NASA SP17069

NASA Thesaurus Astronomy Vocabulary

Scientific and Technical Information Division 1988 National Aeronautics and Space Administration Washington, M= . '

NASA SP-7069

NASA Thesaurus Astronomy Vocabulary

A subset of the NASA Thesaurus prepared for the international Astronomical Union Conference July 27-31,1988 This publication was prepared by the NASA Scientific and Technical Information Facility operated for the National Aeronautics and Space Administration by RMS Associates. INTRODUCTION

The NASA Thesaurus Astronomy Vocabulary consists of terms used by NASA indexers as descriptors for astronomy-related documents. The terms are presented in a hierarchical format derived from the 1988 edition of the NASA Thesaurus Volume 1 -Hierarchical Listing. Main (postable) terms and non- postable cross references are listed in alphabetical order.

READING THE HIERARCHY Each main term is followed by a display of its context within a hierarchy. USE references, UF (used for) references, and SN (scope notes) appear immediately below the main term, followed by GS (generic structure), the hierarchical display of term relationships. The hierarchy is headed by the broadest term within that hierarchy. Terms that are broader in meaning than the main term are listed . above the main term; terms narrower in meaning are listed below the main term. The term itself is in boldface for easy identification. Finally, a list of related terms (RT) from other hierarchies is provided. Within a hierarchy, the number of dots to the left of a term indicates its hierarchical level - the more dots, the lower the level (i.e., the narrower the meaning of the term). For example, the term "ELLIPTICAL GALAXIES" which is preceded by two dots is narrower in meaning than "GALAXIES"; this in turn is narrower than "CELESTIAL BODIES". This relationship can be seen in the hierarchy of any of these ' three terms. While allproader, narrower, and related terms in a hierarchy are main (postable) terms from the NASA Thesaurus, some hierarchy terms do not appear as main terms in the NASA Thesaurus Astronomy Vocabulary The reason is that a term may be part of a hierarchical relationship, but is not itself a valid main entry in an astronomy vocabulary. For example, the displays of "IMPACT DAMAGEw and "METEORITIC DAMAGE" show "DAMAGE" as the broadest term, but there is not a main entry for "DAMAGE", which is too general a term for an astronomy vocabulary. Other features include array terms identified by an infinity symbol which organize related concepts under very general headings; scope notes (SN), which restrict the use of a term to a certain context; and "used for" (UF) terms, which are nonpostable variations of the terms that have been cross refer- enced to the postable main term. TYPICAL HIERARCHICAL LISTING ENTRY

POSTABLE TERM -FAR ULTRAVIOLET RADIATION (200 TO 2000 ANGSTROMS) SCOPE NOTE VACUUM ULTRAVIOLET RADIATION / GS ELECTROMAGNETIC RADIATION USED FOR TERM ULTRAVIOLET RADIATION / - FAR ULTRAVlOLET RADLATlON GENERlC STRUCTURE - - . LYMAN ALPHA RADIATION - - LYMAN BETA RADIATION IONIZING RADIATION ULTRAVIOLET RADIATION - FAR ULTRAVIOLET RADIATION . . LYMAN ALPHA RADIATION - LYMAN BETA RADlATlON RELATED TERMS -RT BREMSSTRAHLUNG MEGELLAN ULTRAVIOLET ASTRONOMY SATELLITE NEAR ULTRAVIOLET RADIATION x RADIATION ULTRAVIOLET TELESCOPES X RAYS

TYPICAL USE CROSS REFERENCE ENTRY

NONPQSTABLE TERM b VACUUM ULTRAVIOLET RADIATION ,y_--~cUSE FAR ULTRAVIOLET RADIATION POSTABLE f ERM

TYPICAL ARRAY TERM ENTRY

ARRAY TERM ----c r CLUSTERS SCOPE SN (USE OF A MORE SPECIFIC TERM IS RECOMMENDED-CONSULT THE TERMS LISTED BELOW) RELATED TERM -RT CLUMPS GALACTIC CLUSTERS GLOBULAR CLUSTERS PLEIADES CLUSTER PRAESEPESTARCLUSTERS STAR CLUSTERS VIRGO GALACTIC CLUSTER NASA THESAURUS

ASTRONOMY VOCABULARY

resoitmow SPE~-(CONX) ACTIVE GALACTIC NUCLEI-(CONX) SYMBIOTIC STARS . ACllVE GALACTIC NUCLEI ULTRAVIOLET SPECTRA RT ACTlVE GALAXIES A STARS VISIBLE SPECTRUM GALACTIC RADIATION GS CELESTIAL BODIES eo NUCLEI . STARS ACCRETION DISKS QUASARS . . EARLY STARS RT ASTROPHYSICS RADIO GALAXIES . . . HOT STARS BINARY STARS SEYFERT GALAXIES . . . . A STARS BLACK HOLES (ASTRONOMY) RT BLUE STARS COOLING FLOWS (ASTROPHYSICS) ACTIVE QAUXIES PECULIAR STARS DISKS (SHAPES) GS CELESTIAL BODIES WOLF-RAYET STARS ECLIPSING BINARY STARS . GALAXIES GALACTIC NUCLEI . . ACTIVE GALAXIES ABIOQENESIS ROTATING DISKS . . . MARKARIAN GALAXIES GS WOLUTION (MVELOPMENT) STEUAR MASS ACCRETION . . . RADIO GALAXIES . BIOLOGICAL EVOLUTION X RAY BINARIES . . . SEYFERT GALAXIES . . ABlOaENESUJ RT ACTIVE GALACTIC NUCLEI RT AUTOCATALYSIS ACCUMUUTOAS GALACTIC NUCLEI CHEMICAL EVOLUTION UF COUECTORS GALACTIC RADlATlON LIFE SCIENCES GS ACCUMULATORS QUASARS PANSPERMIA . ACCUMULATORS (COMPUTERS) SPERMATOGENESIS . WST COLLECTORS ACTIVE MAGNETO PARTICLE TRACER . SOLAR COLLECTORS EXPLORERS ABSORPTION BANDS RT ANODES USE AMPTE (SATELLITES) USE ABSORPTION SPECTRA CONCENTRATORS ENTRAPMENT ACTlVE VOLCANOES ABSORPTION SPECTRA FUEL SYSTEMS USE VOLCANOES UF ABSORPTION BANDS PRESSURE VESSELS SPECTRAL ABSORPTION PRESSURIZING ADVANCED ORBITING SOLAR OBSERVATORY GS SPECTRA USE AOSO . RADIATION SPECTRA ACHONDRITES . . ABSORPTION SPECTRA GS CELESTIAL BODIES ADVANCED RECONN ELECTRIC SPACECRAFT . . . FRAUNHOFER LINES . METEORITES UF ARES (SPACECRAm ... HERZBERG BANDS . . STONY METEORITES GS INTERPLANETARY SPACECRAFT . . . TELLURIC LINES ...ACHONWImS . MARS PROBES . SPECTRAL BANDS . . . . BONWC METEORITE . . ADVANCED RECONN ELECTRIC . . ABSORPTION SPECTRA . . . . KAPOETA ACHONDRITE SPACECRAFT . . . FRAUNHOFER UNES . . . . NORTON COUNTY ACHONDRITE UNMANNED SPACECRAFT . . . HERZBERG BANDS RT CHONDRITES . SPACE PROBES . . . TELLURIC LINES IRON METEORITES . . MARS PROBES RT mABSORPTlON . . . ADVANCED RECONN ELECTRIC BALMER SERIES ACTINOGRAPHS SPACECRAFT m BANDS USE ACTlNOMETERS RT mSPACECRAFT CONTINUOUS RADIATION D UNES ACTINOMETERS ADVANCED X RAY ASTROPHYSICS FACILITY ELECTROMAGNETIC ABSORPTION USE X RAY ASTROPHYSICS FACILITY ELECTROMAGNETIC SPECTRA UF ACTINOGRAPHS ELECTRON SPECTROSCOPY EMISSOGRAPHS ELECTRONIC SPECTRA GS MEASURING INSTRUMENTS ADVECTION , RADIATION MEASURING INSTRUMENTS RT ATMOSPHERIC CIRCULATION EMISSION SPECTRA CONVECTION ENERGY SPECTRA . . ACTINOMETERS . . . INFRARED SPECTROMETERS HEAT TRANSFER FRAUNHOFER LlNE DISCRIMINATORS PECLET NUMBER GALACTIC NUCLEI . . . PYRANOMETERS GAMMA RAY ABSORPTIOMETRY . . . RADIOMETERS AERONOMY H ALPHA LlNE . . . . DlCKE RADIOMETERS . . . . INFRARED DETECTORS RT AIRGLOW H BETA LlNE ALPINE METEOROLOGY H GAMMA LlNE . . . . INFRARED SCANNERS . . . . MICROWAVE RADIOMETERS ATMOSPHERIC COMPOSITION H LINES ATMOSPHERIC PHYSICS IONIZING RADIATION . . . . PASSIVE L-BAND RADIOMETERS . . . . PRESSURE MODULATOR AURORAS K UNES DIAL SATELLITE LASER SPECTROMETERS RADIOMETERS . . . . SPECTRORADIOMETERS GEOPHYSICS LlNE SPECTRA MAGNETOSPHERE-IONOSPHERE MICROWAVE SPECTRA . . . SOLAR SPECTROMETERS . . . SPECTROHELIOGRAPHS COUPLING MOLECULAR SPECTRA MESOMETEOROLOGY MOLECULAR SPECTROSCOPY . . . SPECTROPHOTOMETERS METEOROLOGY OSCILLATOR STRENGTHS . . . . INFRARED SPECTROPHOTOMETERS POLAR CUSPS PARAMAGNETIC RESONANCE UPPER ATMOSPHERE PASCHEN SERIES . . . . ULTRAVIOLET PHOTOACOUSTIC SPECTROSCOPY SPECTROPHOTOMETERS PHOTOLUMINESCENT BANDS . . . ULTRAVIOLET DETECTORS AEROPHYSICS PHOTON ABSORPTIOMETRY . . . . ULTRAVIOLET SPECTROMETERS USE ATMOSPHERIC PHYSICS RAMAN SPECTRA . . . . ULTRAVIOLET RYDBERG SERIES SPECTROPHOTOMETERS AEROSPACE ENVIRONMENTS SCHUMANN-RUNGE BANDS RT DOSIMETERS SN (EXCLUDES SPACECRAFT SELF ABSORPTION FABRY-PEROT SPECTROMETERS INTERVEHICULAR ENVIRONMENTS) SOLAR SPECTRA FIELD INTENSITY METERS UF SPACE ENVISONMENT SOLAR SPECTROMETERS SPECTROMETERS GS ENVIRONMENTS SPECTRUM ANALYSIS . AEROSPACE ENVIRONMENTS SPIN TEMPERATURE ACTIVE GALACTIC NUCLEI . . CISLUNAR SPACE STELLAR SPECTRA GS GALACTIC NUCLEI . DEEP SPACE AFTERGLOWS

AEROSPACE ENVIRONM~(WN~) Am AMOR ASTEROID-(CONT.) . . . INTERPLANETARY SPACE 0s ALBEDO . ASTEROID BELTS . . . INTERSTELLAR SPACE . COSMIC RAY ALBEDO . . ASTEROIDS . . EARTH ORBITAL ENVIRONMENTS . EARTH ALBEDO . . . AMOR ASTEROID RT mAEROSPACE SCIENCES . LUNAR ALBEDO RT ASTRONOMY ARGONQXYGEN ATMOSPHERES RT ABSORPTANCE JUPITER (PLANET) mASTRONAUTICS COSMIC RAYS MARS (PLANET) BlOASFRONAUTlCS EARTH RADIATION BUDGET PLANETARY ORBITS BlOmOCESSlNG EXPERIMENT SOLAR SYSTEM BIOSATELUTES OPTICAL PROPERTIES COSMIC RAYS PlANETARY RADIATION Anuwmrn ASTEROID rn ATMOSPHERE R-ANCE GS CELESTIAL BODIES E~OMAGN€llC RADIATION SOLAR RADIATION . ASTEROID BELTS EXOBIOLOGY SURFACE PROPERTIES . . ASTEROIDS EXTRATERRESTRIAL ENVIRONMENTS . . . AMPHITRITE ASTEROID €XrRATERRESTRIAL UFE ALLENM mourn RT GALIEO PROJECT ~XTRATERRESTRIAL RADIATION GS CELESTIAL BODIES EXTRAVEHICULAR ACTIVITY . METEORITES AMPLITUDES GEOPHYSICAL FLUID FLOW CELLS . . STONY METEORITES GS AMPLITUDES HAZARDOUS MATERIAL DISPOSAL (IN . . . CHONDRITES . PULSE AMPLITUDE SPACE) . . . . CARBONACEOUS CHONDRITES . SCAlTERING AMPLITUDE HELIUM-OXYGEN ATMOSPHERES . . . . . ALLENDE METEORITE RT AMPLIFICATION JUPITER ATMOSPHERE CYCLES LIFE SUPPORT SYSTEMS ALMUCANTAR DIMENSIONS LUNAR ENVIRONMENT USE ELEVATION ANGLE DISPLACEMENT MANNED SPACE FLIGHT FREQUENCIES MARS-ATM~SPHERE m INTENSITY NEPTUNE ATMOSPHERE ALSEP LEVEL (QUANTITY) PANSPERMIA USE APOLLO LUNAR SURFACE EXPERIMENTS MAGNITUDE PLANETARY ENVIRONMENTS PACKAGE OSCILLATIONS RADIATION BELTS PHASE DEVIATION SOLAR RADIATION ALTIMETERS PICOSECOND PULSES SPACE EXPLORATION GS MEASURING INSTRUMENTS PULSES SPACE FLIGHT . DISTANCE MEASURING EQUIPMENT STANDING WAVE RATIOS SPACE HABITATS . . ALTIMETERS VIBRATION SPACE MANUFACTURING . . . LASER ALTIMETERS RADIO ALTIMETERS SPACEBORNE EXPERIMENTS . . . AMrn (SATELLnES) SPACECRAFT CABIN SIMULATORS RT AIRCRAFT INSTRUMENTS SN (ACTIVE MAGNETOSPHERIC PARTICLE THERMAL ENVIRONMENTS ALTlMETRY TRACER EXPLORERS) URANUS ATMOSPHERE . ALTITUDE UF ACTIVE MAGNETO PARTICLE TRACER VACUUM APPROACH INDICATORS EXPLORERS VENUS ATMOSPHERE ASTROLABES GS ARTIFICIAL SATELLITES BAROMETERS . SCIENTIFIC SATELLITES FLIGHT INSTRUMENTS AFERGLOW . . AMPE (SATELLITES) GS AFTERGLOWS HYPSOMETERS RT EARTH MAGNETOSPHERE . HELIUM AFTERGLOW LANDING INSTRUMENTS EUROPEAN SPACE PROGRAMS . OXYGEN AFTERGLOW NAVIGATION AIDS SATELLITE-BORNE INSTRUMENTS RT ATMOSPHERIC IONIZATION NAVIGATION INSTRUMENTS SOLAR WIND GAS DISCHARGES POSITION INDICATORS SPACE PLASMAS GAS IONIZATION RANGE FINDERS SPACEBORNE EXPERIMENTS UGH1 SCAlTERlNG RATE OF CUM0 INDICATORS SATELLITE ALTIMETRY LUMINESCENCE m ANDROMEDA PHOSPHORESCENCE SN (USE OF A MORE SPECIFIC TERM IS PLASMA DECAY ALTIMY RECOMMENDED-CONSUL LT THE TERMS GS ALllMEVRY LISTED BELOW . SATELLITE ALTIMETRY AGB STARS RT ANDROMEDA CONSTELLATION RT ALTIMETERS ANDROMEDA GALAXY USE ASYMPTOTIC GIANT BRANCH STARS ALTITUDE ELEVATION ANDROMEDA CONSTEUATlON AIRGLOW GEODESY GEOIDS GS CONSTELLATIONS UF ATMOSPHERIC EMISSION . ANDROMEDA CONSTEUATION GS ATMOSPHERIC RADIATION RADAR MEASUREMENT RT mANDROMEDA SKY RADIATION TOPOGRAPHY . ANDROMEDA GALAXY . .-~lRcKow . . . GEOCORONAL EMISSIONS ALTITUDE . . . NIGHTGLOW GS ALmUOE ANDROMEDA GALAXY ' . . . TWILIGHT GLOW . FLIGHT ALTITUDE GS CELESTIAL--- BODIES ELECTROMAGNETIC RADIATION . HIGH ALTITUDE GALAXIES . LIGHT NlSlBLE RADIATION) . LOW ALTITUDE . GALACTIC CLUSTERS . . SKY RADIATION . MIDALTITUDE . . LOCAL GROUP (ASTRONOMY) . . . AIRGLOW . SEA LEVEL . . . . ANDROMEDA GALAXY . . . . GEOCORONAL EMISSIONS RT ALTIMETERS RT *ANDROMEDA . . . . NIGHTGLOW ALTIMETRY ANDROMEDA CONSTELLATION . . . . TWILIGHT GLOW APEXES DISK GALAXIES RT AERONOMY AZIMUTH SPIRAL GALAXIES ATMOSPHERIC IONIZATION DISTANCE AURORAS ELEVATION ANGULAR ACCELERATION CHEMILUMINESCENCE ELEVATION ANGLE GS RATES (PER TIME) EARTH ATMOSPHERE HEIGHT . ACCELERATION (PHYSICS) EMISSION POSITION (LOCATION) . ANGULAR ACCELERATION FABRY-PEROT SPECTROMETERS RT aACCELERATlON LIGHT EMISSION AMALTHEA CENTRIFUGAL FORCE NIGHT SKY GS CELESTIAL BODIES CENTRIPETAL FORCE OXYGEN SPECTRA . NATURAL SATELLITES DECELERATION RADIATIVE RECOMBINATION . . JUPITER SATELLITES ROTATION RAYLEIGH SCAlTERlNG . . . AMALTHEA SPIN REDUCTION SKY BRIGHTNESS RT JUPITER (PLANET) TRANSVERSE ACCELERATION SOLAR SYSTEM YO-YO DEVICES ALAIS METEORlTE GS CELESTIAL BODIES AMBIT ANGULAR CORRELATION . METEORITES USE FIELD THEORY (PHYSICS) GS CORRELATION . . STONY METEORITES ANGULAR CORRELATION . . . CHONDRITES AMOR ASTEROID RT DATA CORRELATION . . . . CARBONACEOUS METEORITES UF MINOR PLANET 1221 MATTS (SYSTEMS) . . . . . ALAIS METEORITE GS CELESTIAL BODIES VIEW EFFECTS APOLLO SOYUZ TEST PROJECT

ANGULAR MOMENTUM APEXES APOUO LUNAR EXPERIMENT MODULE-(CONX) GS MOMENTUM UF VERTICES . . . APOUO LUNAR EXPERIMENT . ANGULAR MoMENtuM RT ALTITUDE MODULE RT CIASSICAL MECHANICS APHEUONS MANEUVERABLE SPACECRAFT CLEBSCH-GORDAN COEFFICIENTS APOGEES . APOLLO SPACECRAFT ELECTRON SPlN MAXIMA . . AWUO LUNAR EXPERIMENT KINETICS ORBITS MODULE MOMENTS OF INERTIA -PEAKS MANNED SPACECRAFT PARTICLE SPlN PLATEAUS . APOLLO SPACECRAFT QUANTUM NUMBERS TRAJECTORIES . . AWLLO LUNAR EXPERIMENT QUAMUM THEORY ZENITH lllOMNE QUENCHING (ATOMIC PHYSICS) . LUNAR MODULE RACAH COEFFICIENT APMUOISB . . AWUO LUNAR EXPERIMENT REGGE POLES GS APSIDES MODULE SPlN . III\PHEUOI#) REENTRY VEHICLES SPIN TESTS ORBrrS . RECOVERABLE SPACECRAFT STEUAR ROTATION . ELLIPTICAL ORBITS . . APOLLO SPACECRAFT WIGNER COEFFICIENT . . AWEUONS . . . APOUO LUNAR EXPERIMENT . SOLAR ORBITS MODULE ANGULAR MOTION . . APHUK)NS SOFT LANDING SPACECRAFT USE ANGULAR VELOCITY RT APEXES . APOLLO SPACECRAFT PERIHELIONS . . APOLLO LUNAR EXPERIMENT MODULE ANGULAR VELOCIN . LANDING MODULES UF ANGULAR MOTION APOGEES GS APSIDES LUNAR LANDING MODULES GS RATES (PER TIM9 . . . LUNAR MODULE . ANGULAR VELOCITY . APOGEES ORBITS . . . . APOUO LUNAR EXPERIMENT VELOCITY MODULE . ANGULAR VELOCITY . EARTH ORBITS APOGEES RT LUNAR EXPLORATION RT GYRATION . . LUNAR LANDING ORBITAL VELOCITY . ELLIPTICAL ORBITS REVOLVING . .-A#KIEES ROTATION RT APEXES APOLLO LUNAR SURFACE EXPERIMENTS ROTOR SPEED PERIGEES PACKAGE SAGNAC EFFECT UF ALSEP TACHOMETERS PACKAGES TIP SPEED . INSTRUMENT PACKAGES . NASA PROGRAMS . . AWUO LUNAR SURFACE . NASA SPACE PROGRAMS EXPERIMENTS PACKAGE ANNUAL VARIATIONS . s INSTRUMENTS UF SEASONAL VARIATIONS . . . APOUO APPUCATKINS PROGRAM SPACE PROGRAMS LUNAR EXPLORATION GS VARIATIONS . LUNAR RETROREFLECTORS . PERIODIC VARIATIONS . . NASA SPACE PROGRAMS . . . APOUO APPLICATIONS PROGRAM PAYLOADS . . ANNUAL VARIATIONS r SURFACES RT ATMOSPHERIC CIRCULATION RT AAP 1 MISSION AAP 2 BROWN WAVE- EFFECT- -- MISSION CYCLES AAP 3 MISSION APOLLO PROJECT GREEN WAVE EFFECT AAP 4 MISSION GS PROGRAMS MAGNmC VARIATIONS . LUNAR PROGRAMS METEOROLOGICAL PARAMETERS EARTH RESOURCES PROGRAM . . AWLLO PROJECT METEOROLOGY EARTH RESOURCES SURVEY PROGRAM . NASA PROGRAMS MONSOONS SATURN PROJECT . . NASA SPACE PROGRAMS SEASONS SATURN WORKSHOPS . . . APOLLO PROJECT TEMPORAL MSTRIBUTION SATURN 1 WORKSHOP . PROJECTS WEATHER . . APOLLO PROJECT WIND VARIATIONS . SPACE PROGRAMS ZONAL FLOW (METEOROLOGY) . . NASA SPACE PROGRAMS . . . APOUO PROJECT APOLLO ASTEROIDS RT AAP 1 MISSION ANS GS CELESTIAL BODIES AAP 2 MISSION USE ASTRONOMICAL NEIWERLANDS . ASTEROID BELTS AAP 3 MISSION SATELLITE . . ASTEROIDS AAP 4 MISSION . . . APOUO ASTEROIDS ADVANCED RANGE INSTRUMENTATION RT ASTRONOMY ANTIMATTER AIRCRAFT CHIRON COMMAND SERVICE MODULES GS ANTIMATTER EARTH ORBITS . ANTIPARTICLES LSSM JUPITER (PLANET) LUNAR EXPLORATION . . ANTINEUTRINOS MARS (PLANET) . . ANTINUCLEONS LUNAR EXPLORATION SYSTEM FOR PLANETARY ORBITS APOLLO . . ANTIPROTONS SOLAR SYSTEM . . POSITRONS LUNAR MOBILE LABORATORIES RT DEGENERATE MATTER LUNAR PROBES MATTER (PHYSICS) AWUO FUGmS MANNED SPACECRAFT GS SPACE FLIGHT MARQUARDT R4D ENGINE . MANNED SPACE FLIGHT MERCURY PROJECT ANTINODES . . APOLLO FLIGHTS SATURN LAUNCH VEHICLES RT NODES (STANDING WAVES)- -, . . . APOLLO 5 FLIGHT SATURN WORKSHOPS RAREFACTION . . . APOLLO 6 FLIGHT SATURN 1 WORKSHOP RESONANT FREQUENCIES . . . APOLLO 7 FLIGHT SATURN 5 WORKSHOP STANDING WAVES . . . APOLLO 8 FLIGHT SIM VIBRATION . . . APOUO 9 FLIGHT SITE DATA PROCESSORS WAVELENGTHS . . . APOLLO 10 FLIGHT SKYLAB PROGRAM . . . APOLLO 11 FLIGHT SOFT LANDING SPACECRAFT AOSO . . . APOLLO 12 FLIGHT UF ADVANCE0 ORBITING SOLAR . . . APOLLO 13 FLIGHT APOUO SHORT STACK OBSERVATORY . . . APOLLO 14 FLIGHT RT SPACECRAFT CONFIGURATIONS GS OBSERVATORIES . . . APOLLO 15 FLIGHT . ASTRONOMICAL OBSERVATORIES . . . APOLLO 16 FLIGHT . . ASTRONOMICAL SATELLITES . . . APOLLO 17 FLIGHT &POLLO SOYUZ TEST PROJECT . . . OSO RT SKYLAB PROGRAM UF ASTP . . . . AOSO GS PROGRAMS SOLAR OBSERVATORIES PROJECTS . AWLLO LUNAR EXPERIMENT MODULE OSO APOLLO SOYUZ TEST PROJECT . . GS LUNAR SPACECRAFT . . . AOSO RT INTERNATIONAL COOPERATION APOLLO SPACECRAFT RT SUN . INTERNATIONAL RELATIONS . . AWLLO LUNAR EXPERIMENT MANNED SPACECRAFT MODULE RENDEZVOUS APATITES LUNAR LANDING MODULES SOYUZ SPACECRAFT USE MINERALS . LUNAR MODULE SPACE FLIGHT APOLLO SPACECRAFT

APOLLO SOYUZ w P~JEcT-(WNX) APOLLO 6 FUGHT APOUOGS SPACE MISSIONS GS SPACE FUGHT SPACE14 FLIGHT FLIGHT SPACE PROGRAMS . MANNED SPACE FUGHT . MANNED SPACE FLIGHT SPACE RENDEZVOUS . . APOLLO FUGHTS . . APOLLO FLIGHTS SPACECREW TRANSFER . . . APOUO 8 FUQHT . . . APOLLO 14 FUGHT U.S.S.R. SPACE PROGRAM RT EARTH-MOON TRAJECTORIES RT EARTH-MOON TRAJECTORIES LUNAR EXPLORATION LUNAR EXPLORATION AmLLo SPACECRAFr LUNAR EXPLORATION SYSTEM FOR LUNAR EXPLORATION SYSTEM FOR GS LUNAR SPACECRAFT APOUO APOUO . A#KLO SPACECRMT LUNAR FLIGHT LUNAR FUGHT . . APOLLO LUNAR EXPERIMENT LUNAR LANDING LUNAR LANDING MOWLE LUNAR LAUNCH LUNAR LAUNCH MANEUVERABLE SPACECRAFT LUNAR MOWLE LUNAR MODULE . APouo SPACECRm MANNED SPACECRAFT MANNED SPACECRAFT . . AWUO LUNAR EXPERIMENT MOON-EARTH TRAJECTORIES MOON-EARTH TRAJECTORIES MODULE MANNED SPACECRAFT APQUO 15 FUGHT mu0 9 FLIGHT GS SPACE FLIGHT . APOUO SPACECRAFT GS SPACE FUGHT MANNED SPACE FLIGHT . . AWUO LUNAR EXPERIMENT :dANNED SPACE FUGHT . . APOLLO FLIGHTS MODULE APOLLO FLIGHTS ...... APOUO 15 FUGHT REENTRY VEHICLES . . . APOUO 9 FLIGHT , RT EARTH-MOON TRAJECTORIES RECOVERABLE SPACECRAFT RT EARTH-MOON TRAJECTORIES LUNAR EXPLORATION . . APOUO SPACECRAFT LUNAR EXPLORATION LUNAR EXPLORATION SYSTEM FOR . . . APOLLO LUNAR EXPERIMENT LUNAR EXPLORATION SYSTEM FOR APOLLO MODULE AWLLO LUNAR FLIGHT SOFT LANDING SPACECRAFT LUNAR FUGHT LUNAR LANDING . APOLLO SPACECRAFT LUNAR LANDING LUNAR LAUNCH . . AWUO LUNAR EXPERIMENT LUNAR LAUNCH LUNAR MODULE MODULE LUNAR MODULE RT COMMAND MODULES MANNED SPACECRAFT LANDING MODULES MOOMEARTH TRAJECTORIES LUNAR MODULE APoLLo 10 FLIGHT SIM LUNAR WDULE 5 GS SPACE FUGHT LUNAR MODULE 7 . MANNED SPACE FLIGHT APOUO 16 FLIGHT MANNED ORBITAL LABORATORIES . . APOLLO FLIGHTS GS SPACE FLIGHT SAPURN PROJECT ... APOUOlOFLIGm . MANNED SPACE FLIGHT SERVICE MODULES RT EARTH-MOON TRAJECTORIES . . AWLLO FLIGHTS SKYLAB PROGRAM LUNAR EXPLORATION . . . APOLLO 16 FLIGHT UNIFIED S BAND LUNAR EXPLORATION SYSTEM FOR RT EARTH-MOON TRAJECTORIES APOLLO LUNAR EXPLORATION APOUO TELESCOPE MOUNT LUNAR FUGHT LUNAR EXPLORATION SYSTEM FOR GS SPACECRAFT CONFIGURATIONS LUNAR LANDING APOLLO . APOUO TELESCOPE MOUNT LUNAR LAUNCH LUNAR FLIGHT TELESCOPES LUNAR MODULE LUNAR LANDING . MANNED ORBITAL TELESCOPES MANNED SPACECRAFT LUNAR LAUNCH . . APOW TELESCOPE MOUNT MOON-EARTH TRAJECTORIES LUNAR MODULE RT SKYLAB PROGRAM MANNED SPACECRAFT MOON-EARTH TRAJECTORIES AmLLO 11 FLIGHT APOUO 5 FUQKT GS SPACE FUGHT GS SPACE FLIGHT . MANNED SPACE FLIGHT APWO 17 FLIGHT . MANNED SPACE FUGHT . . APOLLO FLIGHTS GS SPACE FLIGHT . . AWLLO FLIGHTS ... A#KU411FLIGHT . MANNED SPACE FLIGHT . . . mu0 5 FLIGHT RT EARTH-MOON TRAJECTORIES . . APOLLO FLIGHTS RT EARTH-MOON TRAJECTORIES LUNAR EXPLORATION . . . APWO 17 FLIGHT LUNAR EXPLORATION LUNAR EXPLORATION SYSTEM FOR RT EARTH-MOON TRAJECTORIES LUNAR EXPLORATION SYSTEM FOR AWLLO LUNAR EXPLORATION AWUO LUNAR FLIGHT LUNAR EXPLORATION SYSTEM FOR LUNAR FLIGHT LUNAR LANDING APOUO LUNAR LANDING LUNAR LAUNCH LUNAR FLIGHT LUNAR LAUNCH LUNAR MOWLE LUNAR LANDING LUNAR MODULE MANNED SPACECRAFT LUNAR LAUNCH LUNAR SPACECRAFT MOON-EARTH TRAJECTORIES LUNAR MODULE MOON-EARTH TRAJECTORIES MANNED SPACECRAFT MOON-EARTH TRAJECTORIES APOUO 6 FUGHT APOLLO 12 FLIGHT GS SPACE FLIGHT GS SPACE FLIGHT . MANNED SPACE FLIGHT APSIDAL ANGLES . MANNED SPACE FLIGHT USE APSIDES . . APOLLO FUGHTS . . APOLLO FLIGHTS . . . APOUO 6 FLIGHT . . . AWLLO 12 FLIGHT RT EARTH-MOON TRAJECTORIES RT EARTH-MOON TRAJECTORIES APSIDES LUNAR EXPLORATION LUNAR EXPLORATION UF APSIDAL ANGLES LUNAR EXPLORATION SYSTEM FOR LUNAR EXPLORATION SYSTEM FOR GS APSIDES AD~II n APOLLO . APHELIONS -..---., APOGEES LUNAR FLIGHT LUNAR FLIGHT LUNAR LANDING LUNAR LANDING . PERIGEES LUNAR LAUNCH LUNAR LAUNCH . PERIHELIONS LUNAR MODULE LUNAR MODULE . PERILUNES LUNAR SPACECRAFT MANNED SPACECRAFT RT ANGLES (GEOMETRY) MOON-EARTH TRAJECTORIES MOON-EARTH TRAJECTORIES ANTIPODES ELLIPTICAL ORBITS ORBITAL MECHANICS APOUO 7 FLIGHT APOUO 13 FUGHT GS SPACE FLIGHT GS SPACE FLIGHT . MANNED SPACE FLIGHT . MANNED SPACE FLIGHT AQUARID METEOROiDS . . APOLLO FLIGHTS . . APOLLO FLIGHTS GS CELESTIAL BODIES . . . APOLLO 7 FUGHT . . . APOUO 13 FLIGHT METEOROID SHOWERS AT EARTH-MOON TRAJECTORIES RT EARTH-MOON TRAJECTORIES AQUARID METEOROIDS LUNAR EXPLORATION LUNAR EXPLORATION METEOROIDS LUNAR EXPLORATION SYSTEM FOR LUNAR EXPLORATION SYSTEM FOR AQUARID METEOROIDS APOLLO APOLLO RT ORIONID METEOROIDS LUNAR FLIGHT LUNAR FLIGHT LUNAR LANDING LUNAR LANDING ARENPROLAND COMET LUNAR LAUNCH LUNAR LAUNCH GS CELESTIAL BODIES LUNAR MODULE LUNAR MODULE . COMETS MANNED SPACECRAFT MANNED SPACECRAFT . . ARENPROLAND COMET MOON-EARTH TRAJECTORIES MOON-EARTH TRAJECTORIES RT SOLAR SYSTEM ASTRONOMICAL CATALOGS

ARES (SPAcEcRAFr) nssoc~~no~REA~oNS-(CONT) ASTRODYNAMICS-(CONT) USE ADVANCED RECONN ELECTRIC PHOTOOXIDATION CELESTIAL MECHANICS SPACECRAFT REACTION KINETICS mDYNAMlCS VAWR PHASES INTERPLANETARY FLIGHT ARIEL ORBITAL MECHANICS GS CELESTIAL BODIES ASTEROID BELTS ORBITAL RESONANCES (CELESTIAL . NATURAL SATELLITES GS CELESTIAL BODIES MECHANICS) . . ICY SATELLITES . ASTEROID BELTS ORBITS . . . ARlU . . ASTEROIDS m SCIENCE . . URANUS SATELLITES . . . AMOR ASTEROID SPACE EXPLORATION . . . ARIEL . . . AMPHITRITE ASTEROID SPACE FLIGHT RT URANUS (PLANET) . . . AWLLO ASTEROIDS SPACE NAVIGATION . . . CERES ASTEROID m SPACECRAFT . CHIRON TRAJECTORY ANALYSIS ARIES . . COlSSTrLLATlOW ICARUS ASTEROID GS CONSTELLATIONS . . . TORO ASTEROID ARIES CONSTELLATION . . . mAPHY . VESTA ASTEROID RT CELESTIAL BODIES . . . SN (EXCLUDES ASTRONOMICAL RT -BELTS CELESTIAL SPHERE PHOTOGRAPHY) METEOROIDS STARS RT ASTRONOMICAL MAPS REGIONS MAPPING SOLAR SYSTEM PLANETARY MAPPING ARlEllD METEOROIDS SPACE DEBRIS GS CELESTIAL BODIES ASTROLABES METEOROID SHOWERS ASlEROlD CAPTURE ARlETlD METEOROIDS GS MEASURING INSTRUMENTS RT ASTEROIDS . INDICATING INSTRUMENTS . METEOROIDS CELESTIAL BODIES . . ARlEllD MElEORO1DS . . ASTROLABES CONTAINMENT RT ALTIMETERS ENCLOSURES ASTROMElRY AROOS METEORITE PAY LOADS ASTRONOMICAL OBSERVATORIES GS CELESTIAL BODIES RETAINING ASTRONOMY . METrORlTES SOLAR SYSTEM CELESTIAL BODIES . . IRON METrORmS POSITION (LOCATION) . . . AROOS MlEORlTE ASTEROID MlSSKlNS POSITION ERRORS GS SPACE MISSIONS SOLAR POSITION ARRIVALS . FLYBY MISSIONS STAR DISTRIBUTION RT APPROACH . . ASTEROID M)88KWr) STAR TRACKERS LANDING RT ASTEROIDS STARS INTERPLANETARY FLIGHT ARTIFICIAL RADIATION BELTS m MlSSKlNS rnoMETRY GS PARTICLES SPACE EXPLORATION RT ASTROLABES . CHARGED PARTICLES ASTRONOMICAL MAPS . . MAGNETICALLY TRAPPED PARTICLES ASTEROIDS ASTRONOMICAL PHOTOGRAPHY . . . RADIATION BELTS GS CELESTIAL BODIES ASTRONOMY . . . . ARTIFICIAL RADIATION BELTS . ASTEROID BELTS M)UBLE STARS . TRAPPED PARTICLES . . ASTEROIDS HIPPARCOS SATELLITE . . MAGNETICALLY TRAPPED PARTICLES . . . AMOR ASTEROID m MEASUREMENT . . . RADIATION BELTS . . . AMPHITRITE ASTEROID PARALLAX . . . . ARTIFICIAL RADIATION BELTS . . . AWLLO ASTEROIDS SOLAR DIAMETER RT INNER RADIATION BELT . . . CERES ASTEROID STELLAR PARALLAX NUCLEAR EXPLOSIONS . . . CHIRON OUTER RADIATION BELT . . . ICARUS ASTEROID m ASTRONAVIXS m RADIATION . . . TORO ASTEROID SN (USE OF A MORE SPECIFIC TERM IS . . . VESTA ASTEROID RECOMMENDEPCONSULT THE TERMS ASCENT RT ASTEROID CAPTURE LISTED BELOW GS ASCENT ASTEROID MISSIONS RT AEROSPACE ENVIRONMENTS . CLIMBING FLIGHT METEOROIDS ARTIFICIAL GRAVITY RT BALLOONS SOLAR SYSTEM ASTRlONlCS DESCENT SPACE DEBRIS ASTRODYNAMICS LUNAR MODULE ASCENT STAGE ASTRONAUTS TAKEOFF ASrP ASTRONOMY USE AWLLO SOYUZ TEST PROJECT AUXILIARY PROPULSION ASCENT TRAJECTORIES AVIONICS GS TRAJECTORIES ASTRlONtCS BIOASTRONAUTICS . ASCENT TRAJECTORIES RT mASTRONAUTICS BIOSATELLITE 3 RT BALLISTIC TRAJECTORIES AVIONICS COSMONAUTS CLIMBING FLIGHT mCONTROL EARTH-VENUS TRAJECTORIES COASTING FLIGHT mELECTRONICS HUMAN FACTORS ENGINEERING DESCENT TRAJECTORIES GUIDANCE (MOTION) LUNAR BASES FLIGHT MECHANICS SATELLITE COMMUNICATION PROPULSION GUIDANCE (MOTION) SINGLE EVENT UPSETS SOFT LANDING INJECTION GUIDANCE SPACECRAFT COMMUNICATION SPACE EXPLORATION LOFTING SPACECRAFT ELECTRONIC EQUIPMENT SPACE FLIGHT LUNAR MODULE ASCENT STAGE SPACECRAFT INSTRUMENTS SPACE MAINTENANCE MIDCOURSE TRAJECTORIES mTEST EQUIPMENT SPACE NAVIGATION MISSILE TRAJECTORIES SPACECRAFT DOCKING PARABOLIC FLIGHT WEIGHTLESSNESS POST BOOST PROPULSION SYSTEM GS PAYLOADS . RENDEZVOUS TRAJECTORIES A9TRONAVffiATION SPACECRAFT TRAJECTORIES . SPACE SHU'ITLE PAYLOADS GS NAVIGATION AsWlO MISSIONS (STS1 . . . . CELESTIAL NAVIGATION RT mMlSSlONS . ASSOCIATION REACTIONS . ASlRONAVIGATION SPACEBORNE ASTRONOMY GS CHEMICAL REACTIONS RT AIR NAVIGATION SPACEBORNE TELESCOPES INTERPLANETARY NAVIGATlON . ASSOCIATION REACTIONS SPACELAB PAYLOADS GAS-GAS INTERACTIONS INTERSTELLAR TRAVEL . A~~~CIATIONREACTIONS RADIO NAVlGATlON RT ASTROPHYSICS ASTROBIOLOQY SPACE NAVIGATION CHEMICAL EOUlLlBRlUM USE EXOBIOLOGY CONDENSING ASTRONOMICAL CATALOGS ENDOTHERMIC REACTIONS ASTRODYNAMICS GS DOCUMENTS EXOTHERMIC REACTIONS GS CLASSICAL MECHANICS CATALOGS (PUBLICATIONS) INTERSTELLAR CHEMISTRY SPACE MECHANICS ASTRONOMICAL CATALOGS MOLECULAR GASES . . ASTRODYNAMICS RT CLASSIFICATIONS MOLECULAR INTERACTIONS RT mASTRONAUTlCS EPHEMERIDES OXIDATION ASTRONOMICAL OBSERVATORIES NORTHERN SKY PHOTOCHEMICAL REACTIONS CELESTIAL BODIES SKY SURVEYS (ASTRONOMY) ASTRONOMICAL COORDINATES

ASTR~~Lc~rums-(WNT.) AS~RONM~ICAL OISSERVATORK~-(CONT.) nss~cwco~cu.mums-(WNT.) SOUTHERN SKY . . . SPARTAN SATELLITES . . . . 050-5 TABLES (DATA) . . . X RAY ASTROPHYSICS FACILITY .... OSOg . . ASTROPLANE . . . . 050-7 AsrRONOWAL COORDINATES . . ROGMISSION ....OSO-8 GS COORDINATES RT ASTRODYNAMICS . . . QUASAT . ASTRONOMICAL COORDINATES ASTROLABES . . . SAS RT AZIMUTH ASTRONOMY . . . . EXRORER 53 SATELLITE CELESTIAL REFERENCE SYSTEMS CELESTIAL BODIES .... sasl CYLINDRICAL COORDINATES GEOPHYSICAL OBSERVATORIES .... SAS-2 GEOCENTRIC COORDINATES JODRELL BANK OBSERVATORY ....SPIS3 NORTHERN SKY LUNAR OBSERVATORIES . . . SPACE INFRARED TELESCOPE PLANETOCENTRIC COORDINATES ~oRTHERNSKY FACILITY PLANISPHERES RAW ASTRONOMY . . . SPARTAN SATELLITES POLAR COORDINATES SOUTHERN SKY . . . X RAY ASTROPHYSICS FACILITY REFERENCE STARS SPACEBORNE TELESCOPES RT ROSAT MISSION SOLAR LONGITUDE TELESCOPES SPACEBORNE ASTRONOMY SPHERICAL COORDINATES ASTRONOMICAL PHOTOaRAPHY ASTRONOMICAL SPE ;ROSCOPY ASTRONOMICAL MAPS GS IMAGERY GS SPECTROSCOPY GS MAPS . ASTRONOMICAL PHOTOGRAPHY . ASTRONOMICAL SPECTROSCOPY . ASTRONOMICAL MAPS PHOTOGRAPHY RT ASTRONOMY . . PLANISPHERES , ASTRONOMICAL PHOTOGRAPHY CONTINUOUS SPECTRA RT ASTROGRAPHY RT AERIAL PHOTOGRAPHY ELECTROMAGNETIC SPECTRA ASTROMETRY ASTROMRRY INFRARED SPECTROSCOPY CELESTIAL REFERENCE SYSTEMS ASTRONOMY ORGANIC SOLIDS CELESTIAL SPHERE ATMOSPHERIC WINDOWS RADIAL VELOCITY LUNAR MAPS BAKER-NUNN CAMERA RADIATION SPECTRA BLACK AND WHITE PHOTOGRAPHY RADIO ASTRONOMY ASTRONOMICAL M0gEf.S C~RONAGRAPHS RADIO SPECTROSCOPY UF ORRERIES DIFFRACTION LIMITED CAMERAS RAMAN SPECTROSCOPY GS MODELS ELHSKIO-OPTICAL PHOTOGRAPHY SOLAR SPECTRA . ASTRONOMICAL MODELS FAINT OBJECT CAMERA SOUTHERN SKY . . DENSITY WAVE MODEL INFRARED ASTRONOMY SPECTRA . . STELLAR MODELS SPECTROSCOPIC TELESCOPES RT BIG BANG COSMOLOGY LALLEMAND CAMERAS STELLAR SPECTRA COROTATION LUNAR PHOTOGRAPHS ULTRAVIOLET SPECTROSCOPY COSMOLOGY LUNAR PHOTOGRAPHY VISIBLE SPECTRUM MATHEMATICAL MODELS REFERENCE STARS X RAY SPECTROSCOPY MOLECULAR CLOUDS ROCKET-BORNE PHOTOGRAPHY PLANETARIUMS SATELLITE-BORNE PHOTOGRAPHY ASTRONOMICAL TELESCOPES REISSNER-NORDSTROM SOLUTION SCHMIDT CAMERAS USE TELESCOPES SOLAR NEUTRINOS SOUTHERN SKY SOLAR OSCILLATIONS SPACEBORNE PHOTOGRAPHY ASTRONOMY STELLAR OSCILLATIONS SPACEBORNE TELESCOPES UF CELESTIAL OBSERVATION GS ASTRONOMY ~ONOMICAL,NETHERLANDS SATELLITE ASTRONOMICAL PHOTOMETRY . GAMMA RAY ASTRONOMY UF ANS GS OPTICAL MEASUREMENT . INFRARED ASTRONOMY GS OBSERVATORIES . PHOTOMETRY . RADAR ASTRONOMY . ASTRONOMICAL OBSERVATORIES . . ASTRONOMICAL PHOTOMETRY . RADIO ASTRONOMY . . ASTRONOMICAL SATELLITES . . . STELLAR SPECTROPHOTOMETRY . SPACEBORNE ASTRONOMY . . . -AL NETHERLANDS ATMOSPHERIC WINDOWS . ULTRAVIOLET ASTRONOMY SATELLIKE BLINKING . X RAY ASTRONOMY RT NETHERLANDS COMETARY ATMOSPHERES . . X RAY SOURCES DIAL SATELLITE . . . X MY BINARIES ASTRONOMICAL OBSERVATORIES INFRARED PHOTOMETRY RT mAEROSPACE SCIENCES GS OBSERVATORIES SPECTROPHOTOMETRY AMOR ASTEROID . ASTROWOWGAL OBSERVATORIES TELEPHOTOMETRY APOLLO ASTEROIDS . . ASTRONOMICAL SATELLITES ASTROLABES . . . ASTRONOMICAL NETHERLANDS m-L SATEuJlm ASTROMrnY SATELLITE GS ARTIFICIAL SATELLITES mASTRONAUTICS . . :GAMMA RAY OBSERVATORY . SCIENTIFIC SATELLITES ASTRONOMICAL OBSERVATORIES . . . HEAO . . ASTRONOMICAL SATELLITES ASTRONOMICAL PHOTOGRAPHY . . . . HEAO 1 . . . GAMMA RAY OBSERVATORY ASTRONOMICAL SPECTROSCOPY .... Hm2 . . . HUBBLE SPACE TELESCOPE ASTROPHYSICS . . . . HEAO 3 . . . SPACE INFRARED TELESCOPE CELESTIAL BODIES . . . HUBBLE SPACE TELESCOPE FACILITY CELESTIAL MECHANICS . . . INFRARED ASTRONOMY SATELLITE . . . X RAY ASTROPHYSICS FACILITY EARTH LIMB . . . INFRARED SPACE OBSERVATORY OBSERVATORIES HALOS (1.30) . ASTRONOMICAL OBSERVATORIES INFRARED SOURCES (ASTRONOMY) . . . IUE . . ASTRONOMICAL SATELLITES INFRARED TELESCOPES . . . MAGELLAN ULTRAVIOLET . . . ASTRONOMICAL NETHERLANDS MASS TO LIGHT RATIOS ASTRONOMY SATELLITE SATELLITE METEOROID SHOWERS . . . OAO . . . GAMMA RAY OBSERVATORY MISSING MASS (ASTROPHYSICS) .... OAOl . . . HEAO mPHYSlCAL SCIENCES .... OA02 .... HE401 RELIC RADIATION .... 0A03 . . . . HEAO 2 m SCIENCE . . . OSO . . . . HEAO 3 SELENOLOGY . . . . AOSO . . . HUBBLE SPACE TELESMPE SIDEREAL TIME . . . . OSO-1 . . . INFRARED ASTRONOMY SATELLITE SKY SURVEYS (ASTRONOMY) . . . . OSO-2 . . . INFRARED SPACE OBSERVATORY SOLAR NEIGHBORHOOD . . . . 050-3 (ISO) SOLAR PARALLAX . . . . OSO-4 . . . IUE SOUTHERN SKY . . . . OSO-5 . . . MAGELLAN ULTRAVIOLET SPACEBORNE TELESCOPES . . . . OSO-6 ASTRONOMY SATELLITE STELLAR MAGNITUDE . . . . GSO-7 . . . OAO STELLAR MODELS . . . . oso-8 .... OAOl STELLAR OSCILLATIONS . . . QUASAT . . . OA0 2 TELESCOPES . . . SAS . . . OAO 3 . . . . EXPLORER 53 SATELLITE . . . OSO ASTROPHYSICS . . . . SAS-1 . . . . AOSO UF GEOASTROPHYSICS . . . . SAS-2 . . . . OSO-1 GS ASTROPHYSICS . . . . SASJ . . . . OSO-2 . COMPUTATIONAL ASTROPHYSICS . . . SPACE INFRARED TELESCOPE . . . . OSO-3 . STELLAR PHYSICS FACILITY . . . . 050-4 . . SOLAR PHYSICS ATMOSPHERIC ELECTRICITY

~smo~nwcs-(CONT) ATMOSPHERES-(CONT) RT ACCRETION DISKS PLANETARY ATMOSPHERES ASSOCIATION REACTIONS PLANETARY IONOSPHERES WlND (METEOROLOGY) ASTRONOMY PRIMITIVE EARTH ATMOSPHERE WlND DIRECTION BRIGHTNESS DISTRIBUTION SATELUTE ATMOSPHERES WlND PROFILES BRIGHTNESS TEMPERATURE SOLAR ATMOSPHERE WINDPOWER UTILIZATION CELESTIAL BODIES STELLAR ATMOSPHERES CELESTIAL MECHANICS URANUS ATMOSPHERE ATMO!iPHERIC COUPOSlTlON COSMOLOGY GS COMPOSITION (PROPERTY) DEGENERATE MAllER A-ERIC ABSORPTION . ATWOSPmRlC COMPOSITION DENSE PLASMAS USE ATMOSPnERlC AllENUATION . . ATMOSPHERIC MOISTURE DISK OALAXlES . . IONOSPHERIC COMPOSITION GALACTIC EvOLUTKX( RT AERONOMY EWMA RAY ASTRONOMY UF ATMOSPHERIC ABSORPTION AIR GRAND UNIFIED THEORY GS ATTENUATION AIR POLLUTION GRAVrrATlONAL COUAPSE ATMOSPHERE AlTENUATION AlTKEN NUCLEI HELIOSEISMOLOGY . AURORAL ABSORPTION CARBON DLOXIDE CONCENTRATION INTERSTELLAR EXTINCTION . . RT ACOUSTIC ATENUATION CHEMICAL COMPOSITION MAGNETIC FIELD CONFIGURATIONS ATMOSPHERIC LASERS CUMATE CHANGE MASS TO UWT RATIOS COSMIC RAY ALBEDO EARTH ATMOSPHERE MICHELSON INTERFEROMETERS ELECTROMAGNETIC ABSORPTION ELECTRON DENSITY (CONCENTRATION) MISSING MASS (ASTROPHYSICS) ELECTROMAGNETIC SCAlTERING EQUATORIAL ATMOSPHERE NAKED SlNGULARlTlES ELECTROMAGNETIC WAVE GAS COMPOSITION ORION NEBULA TRANSMISSION LACATE (EXPERIMENT) r PHYSICS INFRARED ABSORPTION MIDDLE ATMOSPHERE PLANETARY ROTATION MOLECULAR ABSORPTION MOI~RECONTENT RADlO INTERFEROMETERS PLANETARY ATMOSPHERES OZONE DEPLETION RADlO JETS (ASTRONOMY) RADAR ATTENUATION PARTICULATES REUC RADIATION RADAR PLANETARY ATMOSPHERES sr SCIENCE TRANSMISSION RADIATION ABSORPTION PRIMITIVE EARTH ATMOSPHERE SOLAR NEUTRINOS RADlO AlTENUATION RADlO OCCULTATION SPARTAN SATELLITES RADlO TRANSMISSION RADIOACTIVE CONTAMINANTS SPIN TEMPERATURE SHOCK WAVE ATTENUATION SATELLITE ATMOSPHERES STAR FORMATION SHOCK WAVE PROPAGATION SATURN ATMOSPHERE STELLAR CORES THERMAL ABSORPTION SOLAR MESOSPHERE EXPLORER STELLAR ENVELOPES TRANSMISSION TITAN STELLAR EVOLUTION VEGETATIVE INDEX STELLAR INTERIORS WAVE ATTENUATION ATMOSPHERIC CONDUCTIVITY STELLAR OSCILLATIONS WAVE PROPAGATION GS TRANSPORT PROPERTIES THEORETICAL PHYSICS ATKKWPHERIC CONDUCTIVITY WOLF-RAYET STARS . . . IONOSPHERIC CONDUCTIVITY X RAY ASTROPHYSICS FACiLlTY ATMOSPHERIC CHEMISTRY RT AIR X RAY BINARIES GS ENVIRONMENTAL CHEMISTRY CONDUCTIVITY . ATMOSPHERIC CHEMISTRY r CONDUCTIVITY RT ACID RAIN ELECTRICAL RESISTIVITY ASTROPLANE AEROTHERMOCHEMlSTRY THERMAL CONDUCTIVITY SN (LIMITED TO THE EUROPEAN AIRBORNE AIR POLLUTION ASTRONOMICAL OBSERVATORY) AlTKEN NUCLEI ATMOSPHERIC MNSlTY GS OBSERVATORIES ATMOSPHERIC EFFECTS GS DENSITY (MASSIVOLUME) . ASTRONOMICAL OBSERVATORIES mCHEMlSTRY . ATMOSPHERIC DENSITY . . ASTROPLANE FORMYL IONS RT AIR POLLUTION RT A-300 AIRCRAFT MIDDLE ATMOSPHERE BOLTZMANN DISTRIBUTION AIRBORNE EQUIPMENT NITROUS ACID mDENSlTY INFRARED TELESCOPES PHOTOCHEMICAL OXIDANTS DENSITY (NUMBERIVOLUME) PHOTOCHEMICAL REACTIONS ELECTRON DENSITY (CONCENTRATION) ASYMPTOTIC GIANT BRANCH STARS PHYSICAL CHEMISTRY HUMIDITY UF AGB STARS SATELLITE ATMOSPHERES ION DENSITY (CONCENTRATION) GS CELESTIAL BODIES MAGNETOSPHERIC ELECTRON DENSITY MAGNETOSPHERIC ION DENSITY . STARS ATMOSPHERIC CIRCULATION . . GIANT STARS UF WlND CIRCULATION MAGNETOSPHERIC PROTON DENSITY . . . ASYMPTOTIC GIANT BRANCH GS CIRCULATION METEOROLOGY STARS ATMOSPHERIC CIRCULATION PARTICLE DENSITY (CONCENTRATION) . PLANETARY ATMOSPHERES RT CARBON STARS . . ZONAL FLOW (METEOROLOGY) COLOR-MAGNITUDE DIAGRAM RT ADVECTION PLASMA DENSITY PROTON DENSITY (CONCENTRATION) HERTZSPRUNG-RUSSELL DIAGRAM AIR CURRENTS LATE STARS AIR LAND INTERACTIONS SPACE DENSITY M STARS AIR MASSES MlRA VARIABLES ANNUAL VARIATIONS ATMOSPHERIC DIFFUSION RED GIANT STARS ATMOSPHERIC GENERAL CIRCULATION GS DIFFUSION S STARS EXPERIMENT . ATMOSPtiERlC DIFFUSION STELLAR EVOLUTION BAROCLlNlC INSTABILITY AT BOLTZMANN DISTRIBUTION STELLAR MASS EJECTION BRUNT-VAISALA FREQUENCY MOLECULAR DIFFUSION CIRCULATION DISTRIBUTION POLLUTION TRANSPORT r ATMOSPHERES CIRCUMPOLAR WESTERLIES RADlO SCAlTERING SN (USE OF A MORE SPECIFIC TERM IS CLIMATOLOGY TURBULENT DIFFUSION REWMMENDEPCONSUL T THE TERMS CYCLOGENESIS LISTED BELOW EARTH ATMOSPHERE ATMOSPHERIC EFFECTS AT AIR GROUND WlND RT AEROSOLS ARGON-OXYGEN ATMOSPHERES INTERTROPICAL CONVERGENT ZONES AIR POLLUTION ATMOSPHERIC PRESSURE JET STREAMS lMETEOROLOGYl ATMOSPHERIC CHEMISTRY CABIN ATMOSPHERES MERlDlONAL FLOW ATMOSPHERIC CORRECTION CONTROLLED ATMOSPHERES MIDDLE ATMOSPHERE -P EFFECTS EARTH ATMOSPHERE MIXING HEIGHT EROSION ENVIRONMENTS MONSOONS EXPOSURE EQUATORIAL ATMOSPHERE PLANETARY METEOROLOGY RUSTING GAS MIXTURES PLANETARY WAVES SOIL EROSION GASES POLLUTION TRANSPORT TURBULENCE HELIUM-OXYGEN ATMOSPHERES SEA BREEZE VEGETATIVE INDEX HYPOBARIC ATMOSPHERES SOUTHERN OSCILLATION WlND EFFECTS LIFE SUPPORT SYSTEMS SUPERROTATION WlND EROSION METEOROLOGY TORNAWES MIDDLE ATMOSPHERE TROPICAL STORMS ATMOSPHERIC ELECTRICITY NEPTUNE ATMOSPHERE TURBOPAUSE GS ELECTRICITY NEUTRAL ATMOSPHERES TYPHOONS . ATMOSPHERIC ELECTRICITY NONGRAY ATMOSPHERES UPWELLING WATER . . IONOSPHERIC CU~RENTS NONGRAY GAS VERTICAL AIR CURRENTS . . . ELECTROJETS ATMOSPHERIC EMISSION

ATMOSPHERIC ELECTRICITY-(WNI) ATMOSPHERIC OPTICS-(~NI) amosmaa SCA~RINQ-(WNT.) . . . . AURORAL ELECTROJETS TRANSPARENCE RADIO SCATTERING . . . . EQUATORIAL ELECTROJET VEGETATIVE INDEX SIGNAL FADING RT ATMOSPHERICS VEGETATIVE INDEX BAU LIGHTNING ATMOSPHERIC PHYSICS CLOUD PHYSICS UF AEROPHYSICS ATMOSPHERIC SHEUS DUST STORMS GS AlblOWHERIC PHYSlCS USE ATMOSPHERIC STRATIFICATION EARTH ATMOSPHERE . CLOUD PHYSICS ELECTRIC CORONA RT AERONOMY ATMOSPHERIC STRAnFICAllON ELKXFION DENSITY PROFILES BRUNT-VAISALA FREQUENCY UF ATMOSPHERIC SHEUS UGHlNlNG DUST STORMS GS mAnFIcAnoN UGHTNING SUPPRESSlON INTERNATIONAL MAGNETOSPHERIC . ATMOSPHERIC SCRATIFlCATlOM PRIMITIVE EARTH ATMOSPHERE STUDY RT BRUNT-VAISALA FREQUENCY RING CURRENTS MAGNETOSPHERE-IONOSPHERE PLASMA LAYERS STATIC ELECTRICITY CWWNG SURFACE LAYERS TELLURIC CURRENTS METEOROLOGY NEUTRAL SHEETS ATMOSPHERIC EMWON m PHYSICS ATMOSPHERIC TEMPERATURE USE AIRGLOW PLANETARY MrnROLOGY GS TEMPERATURE SATELLITE ATMOSPHERES A~&PHERICTEMPERATURE . . AURORAL TEMPERATURE ATMOSPHERIC ENTRY IONOSPHERIC TEMPERATURE UF PLANETARY ENTRY . . RT AMBIENT TEMPERATURE GS ATMOSPHERIC ENTRY CLIMATE CHANGE . REENTRY GAS TEMPERATURE HYPERBOLIC REENTRY . . ATMOSPHERIC PRESSURE ISOTHERMS HYPERSONIC REENTRY . . UF BAROMETRIC PRESSURE LACATE (EXPERIMENT) UNCONTROLLED REENTRY . . . PRESSURE PLANETARY ATMOSPHERES (SPACECRAFT) . ATMOSPHERIC PRESSURE PLANETARY TEMPERATURE MANNED REENTRY . . RT ANTICYCLONES RADIO OCCULTATION . . SPACECRAFT REENTRY m ATMOSPHERES UNCONTROLLED REENTRY SODAR . . . CYCLOOENESIS SOUND DETECTING AND RANGING (SPACECRAFT) CYCLONES SUBZERO TEMPERATURE GAS PRESSURE TEMPERATURE GRADIENTS GEOPOTENTIAL HEIGHT TEMPERATURE INVERSIONS AEROCA~JRE HIGH ALTITUDE PRESSURE AERODYNAMIC HEATING THERMAL RESOURCES ISOBARS (PRESSURD WEATHER AEROMANEUVERING ISOSTATIC PRESSURE BOUDES PRESSURE GRADIENTS DESCENT TRAJECTORIES RADIO OCCULTATION ATOMIC CLOCKS EARTH ATMOSPHERE SOUTHERN OSCILLATION GS MEASURING INSTRUMENTS o ENTRY WEATHER . TIME MEASURING INSTRUMENTS ENTRY GUIDANCE ISTS) . . CLOCKS FALLING ATO~CLOCKS ATMOSPHEW RADIATION . . . GALILEO PROJECT RT AUTONOMOUS SPACECRAFT CLOCKS GS ATMOSPHERK: RADIATION GAS GUNS CHRONOMETERS AURORAS ORBIT DECAY . CLOCK PARADOX AURORAL ARCS SPACE FLIGHT . . FREQUENCY STANDARDS RED ARCS . . . GAS MASERS . . RADIO AURORAS . ATMOSPHERIC MODELS . DAWN CHORUS MASERS GS MODELS . IONOSPHERIC NOISE MOLECULAR BEAMS TIME MEASUREMENT . AWOSPHERIC MODELS . . WHISTLERS . . REFERENCE ATMOSPHERES . SKY RADIATION RT BAROCUNIC INSTABILITY . . AIRGLOW ATOMIC SPECTRA CHAPMAN-FERRARO PROBLEM . . . GEOCORONAL EMISSIONS GS SPECTRA ENVIRONMENT MODELS . . . NIGHTGLOW . ATOMIC SPECTRA ENVIRONMENT SIMULATION . . . TWILIGHT GLOW RT BALMER SERIES MATHEMATICAL MODELS . . DAYGLOW LYMAN ALPHA RADIATION NUMERICAL WEATHER FORECASTING . STRATOSPHERE RADIATION LYMAN BETA RADIATION OCEAN MODELS . TROPOSPHERIC RADIATION LYMAN SPECTRA PRIMITIVE EARTH ATMOSPHERE RT CORPUSCULAR RADIATION PASCHEN SERIES SOLAR OSCILLATIONS EARTH RADIATION BUDGET RYDBERG SERIES STELLAR OSCILLATIONS ELECTROMAGNETIC RADIATION VENUS CLOUDS EXTRATERRESTRlAL RADIATION WEATHER FORECASTING A'ITINDE (INCLINATION) GREENHOUSE EFFECT UF SPATIAL ORIENTATION IONOSPHERIC HEATING TILT ATMOSPHERIC MOISTURE LIGHT (VISIBLE RADIATION) TILTING GS COMPOSITION (PROPERTY) vi RADIATION GS AlTlTUDE (INCLINATION) ATMOSPHERIC COMPOSITION -RAYS . , PITCH (INCLINATION) . . ATMOSPHERIC MOISTURE SECONDARY COSMIC RAYS . ROLL . CONCENTRATION (COMPOSITION) TERRESTRIAL RADIATION . SATELLITE ORIENTATION . . MOISTURE CONTENT VLF EMISSION RECORDERS YAW...... ATMOSPHERIC MOISTURE RT HORIZONTAL ORIENTATION MOISTURE ATMOSPHERIC REFRACTION INSTRUMENT ORIENTATION . ATMOSPHERIC MOISTURE GS REFRACTION MISALIGNMENT RT ACID RAIN . ATMOSPHERIC REFRACTION s MOTION ANVIL CLOUDS . . RADIO WAVE REFRACTION mORlENTATlON CAP CLOUDS RT ELECTROMAGNETIC RADIATION m POSITION CIRROCUMULUS CLOUDS LIGHT TRANSMISSION mSPACE ORIENTATION CIRROSTRATUS CLOUDS REFRACTIVITY STABILITY AUGMENTATION CLOUDS (METEOROLOGY) SOLAR RADIATION TILTMETERS DEW POINT WAVE DISPERSION VERTICAL ORIENTATION HUMIDITY PRECIPITATION (METEOROLOGY) ATMOSPHERIC SCATTERING AUGER EFFECT PSYCHROMETERS GS SCATTERING WATER VAPOR WAVE SCATTERING RT COSMIC RAY SHOWERS . . ATMOSPHERIC SCATTERING lo EFFECTS ELECTRON TRANSITIONS ATMOSPHERIC OPTICS . . . TROPOSPHERIC SCATTERING RT ADAPTIVE OPTICS RT ATMOSPHERIC LASERS ATMOSPHERIC LASERS . CIRCUMSOLAR RADIATION AUGER SPECTROSCOPY CLARITY DIFFRACTION GS SPECTROSCOPY HAZE OlFFUSlON AUGER SPECTROSCOPY INFRARED ABSORPTION ELECTROMAGNETIC SCATTERING RT CHEMICAL ANALYSIS LIGHT TRANSMISSION HALOS ELECTRON TRANSITIONS OPACITY LIGHT SCAVERING SPECTROSCOPIC -ANALYSIS .aOPTICS MICROWAVE SCATTERING THERMITES AURGA CONSTEWTION ~MUTH-(CONZ) BARRED GALAXIES GS CONSTEWTIONS CELESTIAL RERRENCE SYSTEMS GS CELESTIAL BODIES . AURIGA CONSTrWTKIN mDIRECTION . GALAXIES RT ZETA AURIGAE STAR ELEVATION ANGLE . . SPIRAL GALAXIES LOOK ANGLES (TRACKING) . . . BARRED GALAXIES RT DISK GALAXIES AURORAL ACTIVITY NAVIGATION GALACTIC STRUCTURE USE AURORAS mORlENTATION POSITION (LOCATION) HUBBLE DIAGRAM L~CALGROUP (ASTRONOMY) AURORAL ARCS STAR CLUSTERS GS ATMOSPHERIC RADIATION STAR DISTRIBUTION . AURORAS STARS . . AURORAL ARCS VIRGO GALACTIC CLUSTER . . . RED ARCS KT mARCS BARYONS B STARS GS PARTICLES AURORAL IONIUTION UF HELIUM STARS . ELEMENTARY PARTICLES GS IONIZATION GS CELESTIAL BODIES FERMIONS STARS . . . GAS IONIZATION . BARYONS EARLY STARS ... . . ATMOSPHERIC IONIZATION . . HYPERONS . . . HOT STARS ...... AURORAL IONIZATION . . . . . XI HYPERONS RT AURORAS . . . . B STARS . . . . . SIGMA ORIONIS . . . . OMEGA-MESONS EXCITATION . . . . RHO-MESONS LIGHT EMISSION RT BLUE STARS SIGMA-MESONS HERBIG-HARO OBJECTS . . . . PHOTOIONIZATION HADRONS UMB BRIGHTENING . RED ARCS BARYONS LIMB DARKENING . . . OMEGA-MESONS PfCUUAR STARS . . . . . RHOMESONS AURORAL IRRADlATK)N STELLAR COMPOSITION . . . SIGMA-MESONS GS IRRADIATION WOLF-RAYET STARS . . . . . AURORAL IRRADIATION RT BARYON RESONANCE RT AURORAS COLD NEUTRONS ELECTRON IRRADIATION BACKGROUND RADIATION DARK MATTER EXCITATION RT BIG BANG COSMOLOGY ETA-MESONS ION IRRADIANON CONTINUOUS RADIATION FAST NEUTRONS MTONINIZATION COR WSCULAR RADIATION GRAVlTlNOS COSMIC BACKGROUND EXPLORER KAONS SATELUTE MESON RESONANCE COSMIC NOISE MESONS GS TEMPERATURE ELECTROMAGNETIC NOISE . ATMOSPHERIC TEMPERATURE MUONS EXTRATERRESTRIAL RADIATION NEUTRONS ..AURORAL TEMPERATURE HIGH ALTITUDE TESTS RT AURORAS NUCLEONS IONOSPHERIC NOISE ION TEMPERATURE PHOTONEUTRONS IONOSPHERIC TEMPERATURE ce RADIATION PIONS RELIC RADIATION PROTONS SKY RADIATION AURORAL ZONES RECOIL PROTONS GS REGIONS S6LAR PROTONS . AURORALZONES BACKSCAlTERINO THERMAL NEUTRONS RT AURORAS GS SCATTERING MAGNETIC POLES . BAcKSCA~TERING BCS THEORY POLAR RADIO BLACKOUT RT FORWARD SCATERlNG UF BARDEEN-COOPER-SCHRIEFFER THEORY POLAR REGIONS LASER PLASMA INTERACTIONS RT MANY BODY PROBLEM NUC~SCATTERING SUPERCONDUCTIVITY SCArnR PROPAGATION AURORAS mTHEORIES UF AURORAL ACTIVITY THERMODYNAMIC COUPLING POLAR AURORAS BAKER-NUNN CAMERA GS ATMOSPHERIC RADIATION GS OPTICAL EQUIPMENT BEDlASmS . AURORAS . CAMERAS GS CELESTIAL BODIES . . AURORAL ARCS . . BAKER-NUNN CAMERA . METEORITES . . . RED ARCS PHOTOGRAPHIC EQUIPMENT . . STONY METEORITES . . RADIO AURORAS . CAMERAS . . . TEKTITES RT AERONOMY . . BAKER-NUNN CAMERA . . . . BEDlASmS AIRGLOW AT ASTRONOMICAL PHOTOGRAPHY AT AUSTRALITES AURORAL IONIZATION SCHMIDT CAMERAS AURORAL IRRADIATION m BELTS AURORAL TEMPERATURE BAUOOHBORNE INSTRUMENTS SN (USE OF A MORE SPECIFIC TERM IS AURORAL ZONES GS MEASURING INSTRUMENTS RECOMMENDEPGONSUL T THE TERMS DAWN CHORUS . BAUOOKBORNE INSTRUMENTS LISTED BELOW) EARTH ATMOSPHERE RT AIRBORNE EOUIPMENT RT ASTEROID BELTS ELECTRON PRECIPITATION BALLOONS CABLES (ROPES) ESRO 4 SATELLITE HIGH ALTITUDE BALLOONS FASTENERS LIGHT EMISSION METEOROLOGICAL INSTRUMENTS GIRDLES MAGNETIC DISTURBANCES RADIOSONDES PROTON BELTS NIGHT SKY TELESCOPES PULLEYS PROTON PRECIPITATION RADIATION BELTS SKY BRIGHTNESS REGIONS SOLAR ACTIVITY BALMER SERIES ROUSE BELTS X RAYS GS SPECTRA SEAT BELTS . RADIATION SPECTRA TERRESTRIAL DUST BELT . . ELECTROMAGNETIC SPECTRA AUSTRALmS LlNE SPECTRA . . . BESSEL-BREDICHIN THEORY GS CELESTIAL BODIES . . . BALMER SERIES . RT COMETS . METEORITES RT ABSORPTION SPECTRA . . STONY METEORITES ATOMIC SPECTRA KOHOUTEK COMET . . . TEKTITES ELECTRON TRANSITIONS RADIATION PRESSURE . . . AUSTRAUTES EMISSION SPECTRA RT BEDlASlTES H BETA LlNE H GAMMA LINE BETA INTERACTIONS AXAF H LINES USE WEAK lNTERACTlONS (FIELD THEORY) USE X RAY ASTROPHYSICS FACILITY HYDROGEN BIG BANG COSMOLOGY AZIMUTH GS COSMOLOGY UF SOLAR AZIMUTH BARDEENCOOPER-SCHRIEFFER THEORY BIG BANG COSMOLOGY RT ALTITUDE USE BCS THEORY RT ASTRONOMICAL MODELS ANGLES (GEOMETRY) BACKGROUND RADIATION ASTRONOMICAL COORDINATES BAROMETRIC PRESSURE COSMIC RAYS BEARING (DIRECTION) USE ATMOSPHERIC PRESSURE GALACTIC EVOLUTION BINARY STARS

BIG BIN^ cosuomv-(WNT) BUCK BODY RADIATION-(WNT) BOSE-EINSTEIN mnmcs GAMMA RAY BURSTS . THERMAL RADIATION USE QUANTUM STATISTICS GRAND UNIFIED THEORY . . BUCK BODY RADIATION GRAVITATIONAL CONSTANT RT BRIGHTNESS DlSTRIBUS1ON BREMSSTRAHLUNG RELATIVITY BRIGHTNESS TEMPERATURE GS ELECTROMAGNETIC RADIATION RELIC RADIATION EMlSSlVlTY . BREMSSTRAHLUNG UNIVERSE HEAT RADIATORS RT CERENKOV RADIATION HOHLRAUMS DIFFRACTION RADIATION BINARY STARS INFRARED RADIATION ELECTRON PHOTON CASCADES GS CELESTIAL BODIES KIRCHHOFF LAW OF RADIATION EIECIRON RADIATION . STARS UGHT WlSlBLE RADIATION) FAR ULTRAVIOLET RADIATION . . DOUBLE STARS NONGRAY ATMOSPHERES WMARAY BURSTS . . . BWYSTARS NONGRAY GAS GAMMA RAYS . . . . CATACLYSMIC VARIABLES PLANCKS CONSTANT NUCLEAR RADIATION . . . . COMPANION STARS RADIANCE RELATIVISTIC PLASMAS . . . . . NEMESIS (STAR) mRADIATION SYNCHROTRON RADIATION . . . . ECLIPSING BINARY STARS SUNUGHT X RAYS . . . . . DWARF NOVAE ULTRAVIOLET RADIATION . . . . . LAMBDA TAURI STARS BRIGHTNESS . . . . . ZETA AURIGAE STAR BLACK HOLES (ASTRONOMY) GS ELECTROMAGNETIC PROPERTIES . . . . SIGMA ORIONIS GS CELESTIAL BODIES OPTICAL PROPERTIES . . . . SYMBIOTIC STARS . STARS . . BRIGHTNESS RT ACCRETION DISKS . . BLACK HOLES (ASTRONOMY) RT BlSTATlC REFLECTIVITY LIMB DARKENING RT ACCRETION DISKS BRIGHTNESS DISTRIBUTION STAR CLUSTERS DEGENERATE MATTER COLOR STELLAR PARALLAX GRAVITATIONAL COLLAPSE DIMMING STELLAR SYSTEMS GRAVITATIONAL LENSES EMlSSlVlTY TWO BODY PROBLEM NAKED SINGULARITIES FLUX (RATE) VARIABLE STARS REISSNER-NORDSTROM SOLUTION GLARE SUPERNOVA REMNANTS HUMAN FACTORS ENGINEERING BKMENESIS wnm HOLES (ASTRONOMY) ILLUMINANCE USE BIOLOGICAL MOLUTION X RAY BINARIES ILLUMINATING INCANDESCENCE BlOLOGlCAL EVOLUTION BLUE STARS m INTENSITY UF BlOGENESlS GS CELESTIAL BODIES LIGHT (VISIBLE RADIATION) GS EVOLUTION (DEVELOPMENT) . STARS LlMB BRIGHTENING . BIOLOGICAL EVOLUTION . . EARLY STARS LUMINANCE . . ABIOGENESIS . . . HOT STARS LUMINESCENCE RT ARCHAEBACTERIA . . . . .BLUE STARS LUMINOSITY m BIOLOGY RT A STARS LUMINOUS INTENSITY CHEMICAL EVOLUTION B STARS LUSTER EUKARYOTES 0 STARS RADIANCE GENE EXPRESSION RADIANT FLUX DENSITY GENETICS BODY TEMPERATURE (NOKBIOLOGICAL) REFLECTANCE LIFE SCIENCES USE TEMPERATURE SKY BRIGHTNESS MUTAGENS STELLAR LUMINOSITY MUTATIONS BOUDES VlSlBIUTY PANSPERMIA GS CELESTIAL BODIES VISION PROKARYOTES . METEOROIDS PROTEIN SYNTHESIS . . BOLIDES BRIGHTNESS DtSTRleVnON . . . CYRILUD METEOROIDS GS DISTRIBUTION (PROPERTY) BL LACERTAE OBJECTS RT ATMOSPHERIC ENTRY . BRMHTNESS DISTRIBUTION GS CELESTIAL BODIES ATMOSPHERIC timnffi ELECTROMAGNETIC PROPERTIES . BL LACERTAE OBJECTS mFIREBALLS . OPTICAL PROPERTIES RT EXTRAGALACTIC RADIO SOURCES METEOR TRAILS . . BRIGHTNESS DISTRIBUTION GALAXIES METEORITES STATISTICAL DISTRIBUTIONS IRREGULAR GALAXIES METEOROID SHOWERS . BRIGHTNESS DISTRIBUTION LUMINOUS INTENSIN PRIBRAM METEORITE AT ASTROPHYSICS POLARIZATION WAVES) BLACK BODY RADIATION RADIANT FLUX DENSITY BOLOGRAW BRIGHTNESS RADIO SOURCES (ASTRONOMY) USE BOLOMETERS BRIGHTNESS TEMPERATURE mDlSTRlBUTlON BUCK AND wnm PHOTOGRAP~Y aoLoMrnr+s GAIACTIC RADIATION GS IMAGERY UF BOLOGRAMS PHOTOGRAPHY . BLACK AND wnm Pm)ioQaArny GS MEASURING INSTRUMENTS RADIANT FLUX DENSITY PHOTOGRAPHY . RADIATION MEASURING INSTRUMENTS RADIO ASTRONOMY . BUCK AND WHITE PHOTOGRAPHY . . BoLoMmRS SOLAR GRANULATION RT ALL SKY PHOTOGRAPHY RT DlCKE RADIOMETERS STELLAR LUMINOSITY ASTRONOMICAL PHOTOGRAPHY ELECTRICAL MEASUREMENT AUTORADIOGRAPHY HEAT MEASUREMENT BRIGHTNESS TEMPERATURE CHRONOPHOTOGRAPHY INFRARED DETECTORS GS TEMPERATURE CINEMATOGRAPHY PHOTOMETERS . BRIGHTNESS TEMPERATURE CLOUD PHO1JGRAPHY POTENTIOMETERS (INSTRUMENTS) AT ASTROPHYSICS COLOR PHOTOGRAPHY RADIATION PYROMETERS BLACK BODY RADIATION ELECTRaOPTlCAL PHOTOGRAPHY RADIOMETERS BRIGHTNESS DISTRIBUTION ELECTRON PHOTOGRAPHY RESISTANCE THERMOMETERS LlMB BRIGHTENING FRAME PHOTOGRAPHY TEMPERATURE MEASUREMENT METEOROLOGY INFRARED PHOTOGRAPHY TEMPERATURE MEASURING PHOTOGRAPHY LUNAR PHOTOGRAPHY INSTRUMENTS RADIO ASTRONOMY PHOTOMlCROGRAPHY TEMPERATURE MEASUREMENT PHOTORECONNAISSANCE rn BOMBARDMENT RADAR PHOTOGRAPHY SN (USE OF A MORE SPECIFIC TERM IS BROKEN SYMMETRY ROCKET-BORNE PHOTOGRAPHY RECOMMENDED-CONSULT THE TERMS WF SYMMETRY BREAKING SATELLITE-BORNE PHOTOGRAPHY LISTED BELOW) GS SYMMETRY SCHLIEREN PHOTOGRAPHY RT HYPERVELOCITY PROJECTILES . BROKEN SYMMETRY SHADOWGRAPH PHOTOGRAPHY IRRADIATION RT GRAND UNIFIED THEORY SPACEBORNE PHOTOGRAPHY METEORITIC DAMAGE MATWEMATICAL MODELS SPECTROHELIOGRAPHS SPUTTERING SUPERGRAVITY SPECTROPHOTOGRAPHY SUPERSYMMETRY STEREOPHOTOGRAPHY BDNWC METEORITE THEORETICAL PHYSICS ULTRAVIOLET PHOTOMETRY GS CELESTIAL BODIES UROGRAPHY . METEORITES BRUDERHEIM METEORITE . . STONY METEORITES GS CELESTIAL BODIES BUCK BODY RADIATION . . . ACHONDRITES . METEORITES GS ELECTROMAGNETIC RADIATION . . . . BONWC METEORITE . . STONY METEORITES CELESTIAL BODIES

CARBON STARS CELESCOPES-(WNT) UF C STARS . . MICROWAVE TUBES GS CELESTIAL BODIES . . . CELESCOPES . STARS MICROWAVE EQUIPMENT GIANT STARS MICROWAVE TUBES BURSIS . . . RED GIANT STARS CELESCOPES GS BURSTS . . . . . CARBON STARS MIRRORS GAMMA RAY BURSTS . . . . . LATE STARS CELESCOPES RADIO BURSTS . . . . COOL STARS OPTICAL EQUIPMENT WAR RADIO BURSTS . . . . . CARBONSTARS IMAGE CONVERTERS TYPE BURSTS ...... 2 RT ASYMPTOTIC GIANT BRANCH STARS CELESCOPES TYPE 3 BURSTS . . . . . IRREGULAR VARIABLE STARS TELESCOPES TYPE 4 BURSTS . . . MlRA VARIABLES CLLESMPES TYPE 5 BURSTS . . . . R CORONAE BOREALIS STARS RT SOLAR INSTRUMENTS RT DD DISTURBANCES STEUAR COMPOSmON EMISSION SUBGIANT STARS EXPLOSIONS CELESTIAL BODIES WOLF-RAYET STARS FRAGMENTATION GS CELESTIAL BODIES IMPLOSIONS . ASTEROID BELTS RUPTURING CARBONACEOUS CHONDRtTES . . ASTEROIDS GS CELESTIAL BODIES . . . AMOR ASTEROID . METEORITES . . . AMPHITRITE ASTEROID . . STONY METEORITES . . APOLLO ASTEROIDS . . . CHONDRITES . . . CERES ASTEROID . . . . CARBONACEOUS CHONDRITES . . CHIRON . . . . . AUENDE METEORITE . . . ICARUS ASTEROID . . . . . MURCHISON METEORITE . . . TOR0 ASTEROID VESTA ASTEROID C STARS . . . BL LACERTAE OBJECTS USE CARBON STARS CARBONACEOUS METEORITES . GS CELESTIAL BODIES . COMFTS . METEORITES . . AREND-ROLAND COMET C-M DIAGRAM . . STONY METEORITES . . COMET HEADS USE COLOR-MAGNITUDE DIAGRAM . . . CHONDRITES . . COMET NUCLEI . . . . CARllONICeOUS METEORmS . . COMET TAILS CALDERAS . . . . . ALAS METEORITE . . ENCKE COMET GS LANDFORMS . . . . . COLD BOKKEVELD METEORITE . . GIACOBINI-ZINNER COMET . CALDERAS . . . . . IVUNA METEORITE . . GRIGGSKJEUERUP COMET RT CONES (VOLCANOES) . . . . . MURRAY METEORITE . . HALLN'S COMET CRATERS . . . . . ORGUEIL METEORITE . . HUMASON COMET LAVA . . . . . TONK METEORITE . . IRASARAKI-ALCOCK COMET MARS VOLCANOES RT EXOBIOLOGY . . KOHOUTEK COMET VOLCANOES METEORITIC COMPOSITION . . MOREHOUSE COMET VOLCANOLOGY . . MRKOS COMET CARRIMTON ROTATION . SCHWASSMANN-WACHMANN COMET CALUSTO USE SOLAR ROTATION . . TEMPEL 2 COMET GS CELESTIAL BODIES . . WEST COMET . FAINT OBJECTS . NATURAL SATELLITES CARTWRAPHY ICY SATELLITES . GALAXIES . . USE MAPPING ACTIVE GALAXIES CALUSTO~ ...... MARKARIAN GALAXIES . . JUPITER SATELLITES CASSEBRAIN OPTICS GALILEAN SATELLITES . . . RADIO GALAXIES . . . RT FIBER opncs SEYFERT GALAXIES . . . . CAUSTO . . . GEOMEfFlICAL OPTICS . . DISK GALAXIES RT CHARON MIRRORS GANYMEDE . . DWARF GALAXIES m OPTICS . . ELLIPTICAL GALAXIES 10 REFLECTING TELESCOPES JUPITER (PLANET) . . GALACTIC CLUSTERS TELESCOPES . . . LOCAL GROUP (ASTRONOMY) . . . . ANDROMEDA GALAXY CANADIAN SPACE -AM CASSOPEIA A . . . VIRGO GALACTIC CLUSTER GS PROGRAMS GS CELESTIAL BODIES . . IRREGULAR GALAXIES . SPACE PROGRAMS . NEBULAE . . MAFFEl GALAXIES . . CANADIAN SPACE PROGRAM . . CASSOPEIA A . . MAGELLANIC CLOUDS . . . ALOUElTE PROJECT . RADIO SOURCES (ASTRONOMY) . . SPIRAL GALAXIES RT AEROSPACE TECHNOLOGY TRANS CASSlOPEIA A . . . BARRED GALAXIES ANIK SATELLITES . . RT ORION NEBULA . . . MILKY WAY GALAXY ANlK 1 . . STARBURST GALAXIES ANlK 2 . INFRARED SOURCES (ASTRONOMY) ANlK 3 CASSOPEIA CONSTELLATION GS CONSTELLATIONS . . INFRARED STARS CANADA . METEORITES CANADIAN SPACECRAFT . CAWOPEIA CONSTrUATlON RT CELESTIAL BODIES . . HARLETON METEORITE COMMUNICATIONS TECHNOLOGY . . IRON METEORITES SATELLITE CELESTIAL SPHERE STARS . . . AROOS METEORITE NASA PROGRAMS . . . ODESSA METEORITE RADARSAT . . . SIKHOTE-ALIN METEORITE SCIENTIFIC SATELLITES CATACLYSMC VARIABLES . . LAZAREV METEORITE SYNCHRONOUS SATELLITES GS CELESTIAL BODIES . . MICROMETEORITES TECHNOLOGY ASSESSMENT . STARS . . OKHANSK METEORITE TECHNOLOGY UTILIZATION . . WUBLE STARS . . STONY METEORITES . . . BINARY STARS . . . ACHONDRITES CANALS . . . . CATACLYSMN: VARIABLES . . . . BONDOC METEORITE GS LANDFORMS . . VARIABLE STARS . . . . KAPOETA ACHONDRITE . CANALS . . . CATACLYSMIC VARIABLES . . . . NORTON COUNTY ACHONDRITE WATERWAYS RT DWARF STARS . . . CHONDRlTES . CANALS ECLIPSING BINARY STARS . . . BRUDERHEIM METEORITE RT DITCHES FLARE STARS . . . . CARBONACEOUS CHOWRITES FLOOD CONTROL HOT STARS . . . . . ALLENOE METEORITE FLUID FLOW NOVAE . . . . . MURCHISON METEORITE GATES (OPENINGS) PERIODIC VARIATIONS . . . . CARBONACEOUS METEORITES GREAT LAKES (NORTH AMERICA) SOLAR OSCILLATIONS . . . . . ALAlS METEORITE IRRIGATION . STELLAR FLARES . . . . . COLD BOKKEVELD METEORITE MARS SURFACE STELLAR MASS EJECTION . . . . . IVUNA METEORITE MATERIALS HANDLING STELLAR OSCILLATIONS . . . . . MURRAY METEORITE PANAMA WHITE DWARF STARS . . . . ORGUEIL METEORITE SEEPAGE . . . . . TONK METEORITE STRAITS CELESCOPES . . . . HVlll'lS CHONDRiTE TROUGHS GS ELECTRON TUBES . . . . PANTAR CHONDRITES WATER FLOW . VACUUM TUBES . . . . PRIERAM METEORITE CELESTIAL, GEODESY

CELESTIAL BODlES-(wN%) CELESTIAL .BODIES-(CON%) CELESTIAL BODIES-(WN%) . . . TEKnTES . . . SATURN (PLANET) . . . IRREGULAR VARIABLE STARS . . . . AUSTRAUTES . . . URANUS (PLANET) . . . . R CORONAE BOREALIS STARS . . . . BEDlASlTES . . PLUTO (PLANET) . . . LAMBDA TAURI STARS . . . TUNGUSK METEORITE . . TERRESTRIAL PLANETS . . . MlRA VARIABLES . METEOROID SHOWERS . . . EARTH (PLANET) . . . . OMICRON cm STAR . . AQUARID MmOROlDS . . . MARS (MET) . . . NOVAE . . ARIEnD METEOROIDS . . . MERCURY (PLANET) . . . . DWARF NOVAE . . CYRILLID METEOROIDS . . . VENUS (PLANET) . . . . HERCULES NOVA . . DRACONID METEOROIDS . PROTOPLANETS . . . SEMIREGULAR VARIABLE STARS . . GEMINID METEOROIDS . RADIO SOURCES (ASTRONOMY) . . . SUPERNOVAE . . LEONID METEOROIDS . . CASSIOPEIA A . . . . SUPERNOVA 1987A . . ORONID METEOROIDS . . EXTRAGALACTIC RADIO SOURCES . . . SYMBIOTIC STARS . . PERSEID METEOROIDS . . . RADIO GAIAXIES . . . T TAURI STARS . . QUADRANTID METEOROIDS . . . RADIO JETS (ASTRONOMY) . . WHITE HOLES (ASTRONOMY) . . TAURID METEOROIDS . . QUASARS . . X RAY STARS . METEOROIDS . . RADIO STARS . STELLAR SYSTEMS . . AQUARID METEOROIDS . . . WLSARS RT ARIES CONSTELLATION . . ARlETlD METEOROIDS . SOLAR 2YSTEM AS+EROID CAPTURE . . BOLIDES . STAR CLUSTERS AITAODYNAMICS- - . . . CYRILUD METEOROIDS . . GLOBULAR CLUSTERS ASTRO~BES . DRACONID METEOROIDS . . . HORIZONTAL BRANCH STARS ASTRONOMICAL OBSERVATORIES . . GEMINID METEOROIDS . . OPEN CLUSTERS ASTRONOMY . . LEONID METEOROIDS . . . PLEIADES CLUSTER ASTROPHYSICS . MICROMETEOROIDS . . . PRAESEPE STAR CLUSTERS z BODIES . . . METEOROID DUST CLOUDS . STARS CASSIOPEIA CONSTELLATION . . . . ZODIACAL DUST . . BLACK HOLES (ASTRONOMY) CENTAURUS CONSTELLATION . . ORIONID METEOROIDS . . DOUBLE STARS CORONA BOREALIS CONSTELLATION . . PERSEID METEOROIDS . . . BINARY STARS CYGNUS CONSTELLATION . . WADRANTID METEOROIDS . . . . CATACLYSMIC VARIABLES GRAVITATIONAL WAVES . . RADIO METEORS . . . . COMPANION STARS IMPACT MELTS . . SPORADIC METEOROIDS . . . . . NEMESIS (STAR) INTERSTELLAR MATER . . TAURID METEOROIDS . . . . ECLIPSING BINARY STARS LYRA CONSTELLATION . NATURAL SATELLITES . . . . . DWARF NOVAE ORBITS . . CHARON . . . . . LAMBDA TAURI STARS SOLAR NEIGHBORHOOD . . ICY SATELLITES . . . . . ZETA AURIGAE STAR SPACE FLIGHT . . . ARlEL . . . . SIGMA ORlONlS UNIVERSE . . . CALLISTO . . . . SYMBIOTIC STARS . . . DlONE . . EARLY STARS CELESTIAL GEODESY . . . ENCELADUS . . . HOT STARS GS GEODESY . . . EUROPA . . . . A STARS . CELESTIAL GEODESY ... GANYMEDE . . . . B STARS RT EXPLORER 29 SATELLITE . . . HYPERION . . . . . SIGMA ORlONlS EXPLORER 36 SATELLITE . . . IAPETUS . . . . BLUE STARS GEODETIC SATELLITES . . . MlMAS . . . . 0 STARS GEOS 1 SATELLITE . . . RHEA (ASTRONOMY) . . . . WHITE DWARF STARS GEOS 2 SATELLITE . . . TETHYS . . . . WOLF-RAYET STARS GEOS 3 SATELLITE . . . TlTANlA . . F STARS INTERNATIONAL SATELLITE GEODESY . . JUPITER SATELLITES . . G STARS U(PERIMENT . . . AMALTHEA . . . SUN TIME . . . GALILEAN SATELUTES . . GIANT STARS . . . . CALUSTO . . . ASYMPTOTIC GIANT BRANCH . . . . EUROPA STARS CELESTIAL MECHANICS . . . . GANYMEDE . . . OMICRON CETl STAR GS CLASSICAL MECHANICS .... 10 . . . RED GIANT STARS . SPACE MECHANICS . . MARS SATELLITES . . . . CARBON STARS . . CELESTIAL MECHANICS . . . DEIMOS . . INFRARED STARS Rf ASTRODYNAMICS . . . PHOBOS . . LATE STARS ASTRONOMY . . MOON . . . COOL STARS ASTROPHYSICS . . SATURN SATELLITES . . . . CARBON STARS EPHEMERIDES . . . DONE . . . . FLARE STARS EQUATIONS OF MOTION . . . ENCELADUS . . . . K STARS FOUR BODY PROBLEM . . . HYPERION . . . . M STARS GRAVITATIONAL WAVES . . . IAPETUS . . . . . VAN BIESBROECK STAR HYPERBOLIC TRAJECTORIES . . . JANUS . . . . MlRA VARIABLES LAGRANGIAN EQUILIBRIUM POINTS . . . MlMAS . . . . OMICRON CETl STAR LONG TERM EFFECTS . . . PHOEBE . . . . S STARS MANY BODY PROBLEM . . . RHEA (ASTRONOMY) . . MAGNETIC STARS mMECHANlCS (PHYSICS) . . . TETHYS . . MAIN SEQUENCE STARS ORBITAL MECHANICS . . . TITAN . . . DWARF STARS ORBITAL RESONANCES (CELESTIAL . . TRITON . . . . DWARF NOVAE MECHANICS) . . URANUS SATELLITES . . . . FLARE STARS ORBITS . . . ARlEL . . . . RED DWARF STARS PERTURBATION THEORY . . . MIRANDA . . . SUN PLANETS . . . OBERON . . METALLIC STARS ROCHE LIMIT . . . TlTANlA . . NEUTRON STARS SCHACH EFFECT . . . UMBRIEL . . . PULSARS SOLAR SYSTEM . NEBULAE . . PECUUAR STARS STARS . . CASSIOPEIA A . . . SIGMA ORlONlS STELLAR ORBITS . . CRAB NEBULA . . . SYMBIOTIC STARS SUN . . GUM NEBULA . . PRAESEPE .STAR CLUSTERS TERRESTRIAL PLANETS . . H I REGIONS . . PROTOSTARS THREE BODY PROBLEM . . H II REGIONS . . . PRE-MAIN SEQUENCE STARS . TRAJECTORY ANALYSIS . . HERBIG-HARO OBJECTS . . . . T TAURI STARS TROJAN ORBITS . . ORION NEBULA . . RADIO STARS TWO BODY PROBLEM . . PLANETARY NEBULAE . . . PULSARS WOLF-RAYET STARS . . REFLECTION NEBULAE . . REFERENCE STARS . PLANETARY RINGS . . SUBDWARF STARS CELESTIAL OB@RVATlON . . JUPITER RINGS . . SUBGIANT STARS USE ASTRONOMY . . SATURN RINGS SUPERGIANT STARS . . URANUS RINGS . R CORONAE BOREALIS STARS CELESTIAL REFERENCE SYSTEMS . PLANETS SUPERMASSIVE STARS RT AIR NAVIGATION . . EXTRASOLAR PLANETS . . VARIABLE STARS ASTRONOMICAL COORDINATES . . GAS GIANT PLANETS . . . CATACLYSMIC VARIABLES ASTRONOMICAL MAPS . . . JUPITER (PLANET) . . . CEPHEID VARIABLES AZIMUTH . . . NEPTUNE (PLANET) . . . FLARE STARS COORDINATES CHARGED PARTICLES

CELESTIAL REFERENCE SYSTEMS-/CONT.) CEP~A-(WNT.) CHARGED PAR~CLES-(CONI) GEOCENTRIC COORDINATES . . CEPSTRA . . . . HEAW NUCLEI INERTIAL REFERENCE SYSTEMS RT OUEFRENCIES . . . . HYPERNUCLEI IN~%RP~ANETARYNAVIGATION . . . . ODD-EVEN NUCLEI INTERSTELLAR TRAVEL CEPSRAL ANALYSIS . . . . ODPODD NUCLEI PLANETOCENTRIC COORDINATES GS DATA PROCESSING . . . PLASMAS (PHYSICS) m REFERENCE SYSTEMS . SIGNAL ANALYSIS . . . . ARGON PLASMA SOLAR LONGITUDE . . CErnAL ANALYSIS . . . . BETA PARTICLES SPHERICAL COORDINATES . VOICE DATA PROCESSING . . . . BOUNDARY LAYER PLASMAS .,,SYSTEMS . . CEPS1RM. AHALYSIS . . . . COLD PLASMAS SPECTRUM ANALYSIS . . . . COLLISIONAL PLASMAS CeLESnAL SPHERE . CEPSIRU ANALYSIS . . . . . STRONGLY COUPLED PLASMAS GS SYMMETRICAL BODIES RT ACOUSTIC MEASUREMENT . . . . COLLISIONLESS PLASMAS . . . . COSMIC PLASMA . BOMES OF REVOLUTION AUDIO FRMUENCIES-- - . . SPHERES ECnOES . . . . CYLINDRICAL PLASMAS . . . CELESTIAL SPHERE MULTIPATH TRANSMISSION . . . . DENSE PLASMAS RT ARIES CONSTELLATION POWER SPECTRA . . . . . PLASMA FOCUS ASTRONOMICAL MAPS SIGNAL REFLECTION . . . . . STRONGLY COUPLED PLASMAS CASSlOPElA CONSTELLATION SIGNATURE ANALYSIS . . . . ELECTRON PLASMA CENTAURUS CONSTELLATION SPECTRALSIGNATURES . . . . ELLIPTICAL PLASMAS CONSTELLATIONS SPEECH RECOGNITION . . . . HELIUM PLASMA CORONA BOREALIS CONSTELLATION TIME LAG . . . . HlGH TEMPERATURE PLASMAS CYGNUS CONSTELLATION VIBRATION MEASUREMENT . . HYDROGEN PLASMA HORIZON . . . . . DEUTERIUM PLASMA LYRA CONSTELLATION CERENKOV COUNTERS . . . . LASER PLASMAS ORBITAL POSITION ESTIMATION GS MEASURING INSTRUMENTS . . . . METALLIC PLASMAS PLANISPHERES . COUNTERS . . . . . CESIUM PLASMA . . RADIATION COUNTERS . . . . MICROPLASMAS ... CERENKOV COUNTERS . . . . NITROGEN PLASMA . . . . NONEQUlLlBRlUM PLASMAS CENTAUR LAUNCH VEHICLE . RADIATION MEASURING INSTRUMENTS . . RADIATION COUNTERS . . . . NONUNIFORM PLASMAS UF CENTAUR VEHICLE . . . . OXYGEN PLASMA GS LAUNCH VEHICLES . . . CERENKOV COUNTERS RT SCINTILLATION COUNTERS . . . . RAREFlED PLASMAS . CENTAUR LAUNCH VEHICLE . . . . RELATIVISTIC PLASMAS . . ATLAS CENTAUR LAUNCH VEHICLE ROTATING PLASMAS CERENKOV EFFECT . . . . ROCKET VEHIWS SEMICONDUCTOR PLASMAS USE CERENKOV RADIATION . . . . . CENTAUR LAUNCH WWLE . . . . SPACE PLASMAS . . ATLAS CENTAUR LAUNCH VEHICLE . . . . . SOLAR WIND RT ATLAS D ICBM CERENKOV RAWATION . . . . . STELLAR WINDS LIQUID PROPELLANT ROCKET ENGINES UF CERENKOV EFFECT . . . .' SPHERICAL PLASMAS SATURN PROJECT GS ELECTROMAGNETIC RADIATION . . . . THERMAL PLASMAS TITAN CENTAUR LAUNCH VEHICLE . CERENKOV RADIATION . . . . TOROIDAL PLASMAS RT BREMSSTRAHLUNG . . IONIZED GASES CENTAUR PROJECT CORPUSCULAR RADIATION . . . LORENYZ GAS GS PROGRAMS COSMIC RAYS . . MAGNETICALLY TRAPPED PARTICLES . NASA PROGRAMS m EFFECTS . . . RADIATION BELTS . . NASA SPACE PROGRAMS GAMMA RAY BURSTS . . . . ARTIF~CIAL RADIATION BELTS . . . CENTAUR PROJECT GAMMA RAYS . . . . INNER RADIATION BELT . PROJECTS LIGHT (VISIBLE RADIATION) . . . . OUTER RADIATION BELT . . CENTAUR PROJECT NUCLEAR RADIATION . . . . PROTON BELTS . SPACE PROGRAMS m RADIATION . . PARTONS . . NASA SPACE PROGRAMS ULTRAVIOLET RADIATION . . PLASMA CLOUDS . . . CENTAUR PROJECT . . . MAGNETIC CLOUDS AT ATLAS CENTAUR LAUNCH VEHICLE CERES ASTEROID . . PLASMA JETS LAUNCH VEHICLES GS CELESTIAL BODIES . . . RADIO JETS (ASTRONOMY) MARINER PROGRAM . ASTEROID BELTS . . PLASMA LAYERS RL-10 ENGINES . . ASTEROIDS . . . PLASMA SHEATHS SURVClOR PROJECT . . . CERES ASTEROID . . PLASMA SLABS . . POSITRONS CENTAUR VEHICLE CHANNEL MULTIPLIERS . . PROTONS USE CENTAUR LAUNCH VEHICLE UF CHANNELTRONS . . . RECOIL PROTONS GS MULTIPLIERS . . . SOLAR PROTONS CENTAURUS CONSTEUATION . CHANNEL MULTIPLIERS RT ANTINEUTRINOS GS CONSTELLATIONS RT AURORAL SPECTROSCOPY ANTIPARTICLES . CENTAURUS CONSTELLATION ELECTRON AVALANCHE BOSONS RT CELESTIAL BODIES MICROCHANNEL PLATES CHARGE TRANSFER CELESTIAL SPHERE PHOTOMULTIPLIER TUBES CORPUSCULAR RADIATION STARS RADIATION COUNTERS COULOMB COLLISIONS COULOMB POTENTIAL CYCLOTRON FREQUENCY CENTIMETER WAVES CHANNELTRONS CYCLOTRON RADIATION GS ELECTROMAGNETIC RADIATION USE CHANNEL MULTIPLIERS CYCLOTRON RESONANCE RADIO WAVES DEUTERON IRRADIATION . . SHORT WAVE RADIATION CHAPMAN-FERRARO PROBLEM ELEMENTARY PARTICLES . . . MICROWAVES RT ATMOSPHERIC MODELS ETA-MESONS . . . . CENTIMETER WAVES EARTH MAGNETOSPHERE GYROFRMUENCY RT COSMIC NOISE INTERPLANETARY MAGNETIC FIELDS HELlOS PROJECT EXTRATERRESTRIAL RADIO WAVES MAGNETOPAUSE HYPERONS MICROWAVE FREQUENCIES r PROBLEMS ION CHARGE SUPERHIGH FREQUENCIES SOLAR WIND KAONS LEPTONS CEPHEID VARIABLES CHARGED PARTICLES LORENTZ FORCE GS CELESTIAL BODIES SN (FOR IONIC PARTICLES SEE IONS) MESON-NUCLEON INTERACTIONS STARS GS PARTICLES MESONS . . VARIABLE STARS CHARGED PARTICLES MUON SPIN ROTATION . . . CEPHEID VARIABLES . . ANTIPROTONS MUONS RT CEPHEUS CONSTELLATION . . ENERGETIC PARTICLES NEUTRAL SHEETS . . . ELECTRONS' NEUTRONS CEPHEUS CONSTELLATION . . . . CONDUCTION ELECTRONS NONADIABATIC THEORY GS CONSTELLATIONS . . . . HlGH ENERGY ELECTRONS x NUCLEI CEPHEUS CONSTELLATION . . . . HOT ELECTRONS NUCLEON-NUCLEON INTERACTIONS RT CEPHEID VARIABLES . . . . N ELECTRONS NUCLEONS . . . . NEGATRONS OMEGA-MESONS CEPSTRA . . . . PI-ELECTRONS PARTICLE CHARGING GS SPECTRA . . . NUCLEI (NUCLEAR PHYSICS) PARTICLE PRECIPITATION POWER SPECTRA .... WEN-EVEN NUCLEI PARTICLE TRAJECTORIES CHARON

CMW P~LES-(WNZ) wmmms4WNZ) CtRcunrsoLnR IEUEXWS-(~N~) PIONS . . STONY METEORITES MEASURING INSTRUMENTS REISSNER-NORDSTROM SOLUTION . . . CHONDRmS MIRRORS RHO-MESONS . . . . BRUDERHEIM METEORITE OPflCAL EQUIPMENT SIGMA-MESONS .... CARBONACEOUS CHONDRITES RADIATION PYROMETERS SINGLE EVENT UPSETS . . . . . ALLENDE--- -- METEORITE SOLAR ENERGY TRAPPED PARTICLES . . . . . MURCHISON METEORITE SOLAR RADIATION . . . . CARBONACEOUS METEORITES . . . . . ALAS METEORITE CIRCUMSTEUAR MATTER CHAROM COLD BOKKEVELD METEORITE GS CELESTIAL BODIES . . . . . USE STELLAR ENVELOPES . NATURAL SATELUTES . . . . . IVUNA METEORm . . . . . MURRAY METEORITE CtSLUNAR SPACE . . . . . ORGUEIL MElEORm GS ENVIRONMENTS TONK DEIMOS . . . . . wrumm . AEROSPACE ENVIRONMENTS EARTH-MOON SYSTEM . . . . msCmXlmm . . CISLUNAR SPACE PANTAR CHONDRlTES EUROPA . . . . . EXTRATERRESTRIAL ENVIRONMENTS PRIERAM METEORITE GALILEAN SATELLITES ...... CISLUNAR SPACE GANYMEM RT ACHONDRITES RT DEEP SPACE CHONDRULE IAPETUS EARTH-MOON TRAJECTORIES TEKTITES 10 INTERPLANETARY SPACE PLANETARY ORBITS LUNAR FLIGHT PLUTO (PLANET) CHONDRUUE LUNAR ORBITS SOLAR SYSTEM RT CHONDRITES r SPACE TITAN ENSTATITE METEORITES m CLOUDS METEORITIC MICROSTRUCTURES CHEMICAL COMPOSmON SN (USE OF A MORE SPECIFIC TERM IS GS COMPOSITION (PROPERM MINERALCGY RECOMMENDEPCONSULT THE TERMS . CHEMICAL COUPaSmON LISTED BELOW . . CARBON DIOXIDE CONCENTRATION CHROYBSPHERE RT CLOUDS (METEOROLOGY) . . STELLAR COMPOSITION GS ENVIRONMENTS WST RT ALKALINITY . EXTRATERRESTRIAL ENVIRONMENTS ELECTRON CLOUDS ATMOSPHERIC COMPOSITION . . STELLAR ATMOSPHERES EXHAUST CLOUDS ATOM CONCENTRATION ... CHROMOSPHERE H I REGIONS BODY COMPOSITION (BIOLOGY) RT CORONAL LOOPS H II REGIONS DISTRIBUTION (PROPERM FACULAE HYDROGEN CLOUDS GAS COMPOSITION PHOTOSPHERE MAGELLANIC CLOUDS IONOSPHERIC COMPOSITION SOLAR ATMOSPHERE MAGNETIC CLOUDS UGANDS SOLAR CORONA METEOROID DUST CLOUDS METALLIC STARS SOLAR PROMINENCES MOLECULAR CLOUDS METALLlClTY SPICULES OORT CLOUD P~ANETARYSTRUCTURE STELLAR STRUCTURE OPHlUCHl CLOUDS SPECTRAL SIGNATURES STELLAR WINDS PARTICLES - PLASMA CLOUDS CHEMICAL EVOLUTION CINDER CONES VENUS CLOUDS GS EVOLUTION (DEVELOPMENT) USE CONES (VOLCANOES) . CHEMICAL EVOLUTION CLUMPS RT ABlOGENESlS CIRCULAR ORBITS RT AGGLOMERATION BIOLOGICAL EVOLUTION GS ORBITS -CLUSTERS m EVOLUTION . CIRCULAR ORBITS PATTERN RECOGNITION EXOBIOLOGY . . STATIONARY ORBITS REGRESSION ANALYSIS LIFE SCIENCES RT EARTH ORBITS ORGANIC COMPOUNDS ECCENTRIC ORBITS ce CLUSTERS PROTEIN SYNTHESIS ELLIPTICAL ORBITS SN (USE OF A MORE SPECIFIC TERM IS EQUATORIAL ORBITS RECOMMENDED-CONSULT THE TERMS CHEYBSPHERE GEOSYNCHRONOUS ORBITS LISTED BELOW. GS EARTH ATMOSPHERE LUNAR ORBITS RT CLUMPS . CHEMOSPHERE ORBKAL MECHANICS GALACTIC CLUSTERS RT BIOSPHERE PLANETARY ORBITS GLOBULAR CLUSTERS EARTH IONOSPHERE POLAR ORBITS PLEIADES CLUSTER HETEROSPHERE QUADRATURES PRAESEPE STAR CLUSTERS HOMOSPHERE SATELLITE ORBITS STAR CLUSTERS LOWER ATMOSPHERE SOLAR ORBITS VIRGO GALACTIC CLUSTER MESOSPHERE SPACECRAFT ORBITS MIDDLE ATMOSPHERE TWENTY-FOUR HOUR ORBITS CN EMISSION- - OZONOSPHERE -UF- CYANIDE EMISSION PLASMASPHERE CIRCUMLUNAR TRAJECTORIES GS ELECTROMAGNETIC RADIATION STRATOSPHERE GS TRAJECTORIES RADIO WAVES THERMOSPHERE . ROUND TRIP TRAJECTORIES RADIO EMISSION TROPOSPHERE . . CIRCUMLUNAR TRAJECTORIES CN EMISSION UPPER ATMOSPHERE . SPACECRAFT TRAJECTORIES EMISSION . . LUNAR TRAJECTORIES RADIO EMISSION CHINESE SPACE PROGRAM . . . CIRCUMLUNAR TRAJECTORIES CN EMISSION GS PROGRAMS RT EARTH ORBITS RT HYDROCYANIC ACID . SPACE PROGRAMS EARTH-MOON TRAJECTORIES MILLIMETER WAVES . . CHINESE SPACE PROGRAM LUNAR FLIGHT RADIO SOURCES (ASTRONOMY) RT CHINA LUNAR ORBITS -RESEARCH PROJECTS MOOKEARTH TRAJECTORIES COBE SPACE MISSIONS REENTRY TRAJECTORIES USE COSMIC BACKGROUND EXPLORER TAIWAN RENDEZVOUS TRAJECTORIES SATELLITE TRANSFER ORBITS CHIRON COESITE UF MINOR PLANET 2060 CIRCUMSOLAR RADIATION GS CHALCOGENIDES GS CELESTIAL BODIES GS EXTRATERRESTRIAL RADIATION OXIDES . ASTEROID BELTS SOLAR RADIATION . . DIOXIDES . . ASTEROIDS . . CIRCUMSOLAR RADIATION . . . SILICON DIOXIDE . . . CHIRON RT ATMOSPHERIC SCATTERING . . . . QUARTZ RT APOLLO ASTEROIDS LIGHT SCATTERING . . COESITE METEOROIDS mRADlATlON SILICON OXIDES PLANETS SCAlTERING . . SILICON DIOXIDE SOLAR SYSTEM SUNLIGHT . . . - - . .. . . - SPACE DEBRIS . . . . COESITE CIRCUMSOLAR TELESCOPES MINERALS CHONDRITES GS TELESCOPES . QUARTZ GS CELESTIAL BODIES CIRCUMSOLAR TELESCOPES . . COESITE . METEORITES RT LENSES SILICON COMPOUNDS COMPANION STARS

COES~-(CONT) COHERENT RIMATION-(CONT) COMA-(CONT) . SILICON OXIDES m RAYS COMET TAILS . . SILICON DIOXIDE WAVE PROPAGATION COMETARY ATMOSPHERES . . . QUARTZ COMETS . . . . COESm COHERENTSOURCES GRIGG-SKJELLERUP COMET RT EARTH CRUST USE COHERENT RADIATION KOHOUTEK COMET EARTH MANTLE RADIATION SOURCES SCREEN EFFECT METEORITES TEMPEL 2 COMET RUTILE UNCONSCIOUSNESS COHERENT TRANSMIWON USE COHERENT RADIATION COMET HEADS GS CELESTIAL BODIES COLD BOKKEVeLD METEORITE . COMETS GS CELESTIAL BODIES COHERENT ANTI-STOKES RAMAN . . COMET HEADS SPecTROSmPY . METEORITES RT -COMA METEORITES USE RAMAN SPECTROSCOPY . . STONY COMETARY ATMOSPHERES . . . CHONORITES SOLAR SYSTEM . . . . CARBONACEOUS M!ZEORlTES COHERENT ELECTROMAGNETIC RIMATION . . . . . COLD BOKKEVELD METEORITE GS COHERENT RADIATION COMET NUCLEI COHERENT ELECTROMAGNETIC GS CELESTIAL BODIES . COLLECTORS RAMATlON . COMETS USE ACCUMULATORS . . COHERENT LlGHT . . COMET NUCLEI ELECTROMAGNETIC RADIATION RT -COMA . COHERENT ELECTROMAGNETIC COLLISION PARAMETERS COMETARY ATMOSPHERES RADIATION GS RATES (PER TIME) OORT CLOUD . . COHERENT LIGHT . COLUSQN PARAMETERS SOLAR SYSTEM RT BEAMS (RADIATIONI . . COLUSION RATES HOLOGRAPHY RT mABSORPTNIN COMET TAILS INFRARED RADIATION BEAM INTERACTIONS GS CELESTIAL BODIES INTERSTELLAR MASERS -CROSS SECTIONS . COMETS IONIZING RADIATION MEAN FREE PATH . . COMET TAILS KRYPTON FLUORIDE LASERS NUCLEAR INTERACTIONS RT mCOMA USERS PARTICLE INTERACTIONS COMETARY ATMOSPHERES LlGHT (VISIBLE RADIATION) PARTICLE THEORY GRIGG-SKJELLERUP COMET MASERS SCATTERING RADIATION PRESSURE MODULATED CONTINUOUS RADIATION SOLAR SYSTEM MONOCHROMATIC RADIATION COLLlSKms SOLAR WIND mRADIATION GS COU1SlONS RADIO WAVES . ATOMIC COLLISIONS COMETARY ATMOSPHERES SQUEEZED STATES (QUANTUM THEORW . COULOMB COUtSlONS RT ASTRONOMICAL PHOTOMETRY STIMULATED EMISSION . INELASTIC COLLISIONS m COMA STIMULATED EMISSION DEVICES . IONIC COLLISIONS COMET HEADS TRAVELING WAVE MASERS . METEORITE COLLISIONS COMET NUCLEI ULTRAVIOLET RADIATION . MIDAIR COLLISIONS COMET TAILS . . BIRD-AIRCRAFT COLLISIONS COMETS COHERENT LIGHT . MOLECULAR COLLISIONS IONOPAUSE GS COHERENT RADIATION . PARTICLE COLUSIONS . COHERENT ELECTROMAGNETIC RT AIR BAG RESTRAINT DEVICES COMETS RADIATION AIR TRAFflC CONTROL GS CELESTIAL BODIES . . COHERENT UGHT AIRCRAFT ACCIDENTS . COMETS ELECTROMAGNETIC RADIATION AIRCRAFT HAZARDS . . AREND-ROLAND COMET . COHERENT ELECTROMAGNETIC AIRCRAFT SAFEN . . COMET HEADS RADIATION COLLISION AVOIDANCE . . COMET NUCLEI . . COHERENT uaw CRASHES . . COMET TAILS . LlGHT (VISIBLE RADlATtON) FLIGHT HAZARDS . . ENCKE COMET . . COHERENT UGHT FLIGHT PATHS . . GIACOBINI-ZINNER COMET RT GAMMA RAY LASERS GAS ATOMIZATION . . GRIGG-SKJELLERUP COMET HCN LASERS PILOT ERROR . . HALLN'S COMET HOLOGRAPHIC INTERFEROMETRY RECOlLlNGS . . HUMASON COMET HOLOGRAPHY SCA'TTERING . . IRASARAKI-ALCOCK COMET LASER OUTPUTS . . KOHOUTEK COMET LASERS COLORCOLOR DIAGRAM . . MOREHOUSE COMET MONOCHROMATIC RADIATION GS DIAGRAMS . . MRKOS COMET NEODYMIUM LASERS . COLORCOLOR DIAGRAM . . SCHWASSMANN-WACHMANN COMET OPTICAL COMPUTERS RT COLOR-MAGNITUDE DIAGRAM . . TEMPEL 2 COMET OPTICAL MEMORY (DATA STORAGE) HERTZSPRUNG-RUSSELL DIAGRAM . . WEST COMET PHASE COHERENCE STELLAR COLOR RT BESSEL-BREDICHIN THEORY PLASMADYNAMIC LASERS STELLAR SPECTRA =COMA RARE GASHALIDE LASERS STELLAR SPECTROPHOTOMETRY COMETARY ATMOSPHERES SCA'TTER PLATES (OPTICS) UBV SPECTRA METEOROID SHOWERS SHlVA LASER SYSTEM METEOROIDS SPECKLE HOLOGRAPHY COLOR-MAGNITUDE DIAGRAM OORT CLOUD SQUEEZED STATES (QUANTUM THEORY) UF C-M DIAGRAM SOLAR SYSTEM STlMULATED EMISSION GS DIAGRAMS TWO-WAVELENGTH LASERS . COLOR-MAGNITUDE DIAGRAM COMMlTlEE ON SPACE RESEARCH ULTRAVIOLET LASERS RT ASYMPTOTIC GIANT BRANCH STARS UF COSPAR (COMMITTEE) COLORCOLOR DIAGRAM RT mAEROSPACE SCIENCES COHERENT RADIANON GLOBULAR CLUSTERS CONFERENCES UF COHERENT SOURCES HERTZSPRUNG-RUSSELL DIAGRAM EUROPEAN SPACE PROGRAMS COHERENT TRANSMISSION HORIZONTAL BRANCH STARS INTERNATIONAL COOPERATION GS COHERENT RADIATION MAIN SEQUENCE STARS NASA PROGRAMS COHERENT ACOUSTIC RADIATION STAR CLUSTERS PROGRAMS . COHERENT ELECTROMAGNETIC STELLAR COLOR RADIATION STELLAR EVOLUTION COMPANION STARS COHERENT LlGHT STELLAR MAGNITUDE GS CELESTIAL BODIES RT BEAMS (RADIATION) . STARS zCOHERENCE m COMA . . DOUBLE STARS COHERENCE COEFFICIENT SN (USE OF A MORE SPECIFIC TERM IS . . . BINARY STARS CONTINUOUS RADIATION RECOMMENDED--CONSUL T THE TERMS . . . COMPANION STARS CORPUSCULARRADIATION LISTED BELOW) . . . . . NEMESIS (STAR) EUSTIC WAVES RT ABERRATION RT PARALLAX ELECTROMAGNETIC RADIATION BLACKOUT (PHYSIOLOGY) STELLAR MOTIONS LlGHT (VISIBLE RADIATION) BLACKOUT PREVENTION VARIABLE STARS OPTICAL PROPERTIES COMET HEADS VISUAL OBSERVATION 7j RADIATION COMET NUCLEI X RAY BINARIES COMPUTATIONAL ASTROPHYSICS

COMPUTATIONAL ASTROPHYSICS COROTATlON GS ASTROPHYSICS . . . boL STARS GS GYRATION . COMPUTATIONAL ASTROPHYSICS . . . . CARBON STARS . ROTATION RT COMPUTATION . . . . FLARE STARS . . COROTATlON COMPUTERIZED SIMULATION . . . . K STARS RT ASTRONOMICAL MODELS MATHEMATICAL MODELS . . . . M STARS EARTH MAGNETOSPHERE -SCIENCE . . . . . VAN BIESBROECK STAR GALACTIC ROTATION . . . . MlRA VARIABLES GALACTIC STRUCTURE CONES WOLeANOEs) . . . . . OMICRON CETl STAR SPIRAL GALAXIES UF CINDER CONES . . . . S STARS STELLAR MOTIONS GS GEOLOGY RT GlAM STARS STEUAR ROTATION . CONES (VmcANoEs1 R CORONAE BOREALIS STARS LANDFORMS STrLLAR ATMOSPHERES CORPUSCUUR RADIATION . CONES (VOLCANOES) STELLAR ENVELOPES SN (LIMITED TO NONELECTROMAGNETIC RT BASALT STrLLAR SPECTRA RADIATION CONSISTING OF ENERGETIC CALOERAS STEUAA TEMPERATURE CHARGED OR NEUTRAL PARTICLES) CRATERS UF PENETRATING PARTICLES EFFUSIVES COOLING FLOWS (AsmoPHYslcs) GS PARTICLES GEOMORPHOLOGY GS FLUID FLOW . CORPUSCULAR RADIATION LAVA . GAS FLOW . . ELECTRON PRECIPITATION MARS VOLCANOES . . CWUNG FLOWS (ASTROPHYSICS) . . ELECTRON RADIATION MOUNTAINS RT ACCRETION DISKS . . . BETA PARTICLES OROGRAPHY COOLING . . . ELECTRON BEAMS PALEOMAGNETISM COSMIC GASES . . . . RELATIVISTIC ELECTRON BEAMS PETROLOGY DARK MATTER . . PRIMARY COSMIC RAYS ROUSE BELTS GALACTIC CLUSTERS . . . SOLAR COSMIC RAYS VOLCANOES GALACTIC EVOLUTION . . RADIATION BELTS VOLCANOLOGY INTERGALACTIC MEDIA . . SOLAR CORPUSCULAR RADIATION INTERSTELLAR GAS . . . SOLAR ELECTRONS CONSTEUATlONS STAR FORMATION . . . SOLAR NEUTRONS GS CONSTELLATIONS X RAY SOURCES . . . SOLAR PROTONS . ANDROMEDA CONSTELLATION RT ALPHA PARTICLES . ARIES CONSTELLATION CQPERNICW SPACECRIFI ATMOSPHERIC RADIATION . AURIGA CONSTELLATION USE OAO 3 BACKGROUND RADIATION . CASSlOPElA CONSTELLATION BEAMS (RADIATION) . CENTAURUS CONSTELLATION CERENKOV RADIATION . CEPHEUS CONSTELLATION CrnKKIS EFFECT CHARGED PARTICLES . CORONA BOREALIS CONSTELLATION RT DISORIENTATION COHERENT RAOIAT~ON . CYGNUS CONSTELLATION -EFFECTS CONTINUOUS RADIATION . LYRA CONSTELLATION METEOROLOGY COSMIC RAYS . ORION CONSTELLATION PLANETARY WAVES ELECTROMAGNETIC RADIATION . SAGllTARlUS CONSTELLATION ROTATING ENVIRONMENTS EXTRATERRESTRIAL RADIATION SCORPIUS CONSTELLATION ROTATION FLUX (RATE) SCUNM CONSTELLATION VESTIBULAR TESTS GALACTIC RADIATION . TAURUS CONSTELLATION INCIDENT RADIATION RT CELESTIAL SPHERE CORONA BOREAUS CONSTELLATION INTERSTELLAR RADIATION PLANISPHERES GS CONSTELLATIONS IONIZING RADIATION STARS . CORONA BOREAUS CONSTELLATION IONS ZODIAC RT CELESTIAL BODIES MESONS CELESTIAL SPHERE NEUTRONS CONgTRUCTlON IN SPACE STARS NUCLEAR PARTICLES USE ORBITAL ASSEMBLY NUCLEAR RADIATION CORONAGRAPHS NUCLEI (NUCLEAR PHYSICS) CONTINlJoUS SPECTRA RT ASTRONOMICAL PHOTOGRAPHY PARTICLE PRODUCTION GS SPECTRA SOLAR OBSERVATORIES PHONON BEAMS . CONTIMUOUS SPECTRA SPECTROHELIOGRAPHS PULSED RADIATION RT ASTRONOMICAL SPECTROSCOPY STARSAT TELESCOPE mRADIATION SOLAR SPECTRA TELESCOPES RADIATION DISTRIBUTION SPECTRAL EMISSION RADIATION PRESSURE STELLAR SPECTRA RADIATION SOURCES CORONAL HOLES *RAYS GS CORONAS CONVECTION REFLECTED WAVES STELLAR CORONAS GS CONVECTION . REFRACTED WAVES . SOLAR CORONA FORCED CONVECTION . SOLAR RADIATION . CORONAL HOLES FREE CONVECTION . . . SOLAR TERRESTRIAL INTERACTIONS RT DECAMETRIC WAVES . RAYLEIGH-BENARD CONVECTION STRATOSPHERE RADIATION BENARD CELLS mHOLES . . RADIO ASTRONOMY . MARANGONI CONVECTION SOLAR RADIO EMISSION COSMIC BACKGROUND EXPLORER SATELLITE RT ADVECTION SOLAR WIND UF COBE BASE HEATING SOLAR X-RAYS GS ARTIFICIAL SATELLITES BOUSSINESQ APPROXIMATION STELLAR STRUCTURE SCIENTIFIC SATELLITES m CONDUCTION ULTRAVIOLET RADIATION . EXPLORER SATELLITES FLUID DYNAMICS . COSMIC BACKGROUND EXPLORER GRASHOF NLdBER SATELLITE HEAT TRANSMISSION CORONAL LOOPS RT BACKGROUND RADIATION HEATING GS CORONAS RADIATION SPECTRA METEOROLOGY . STELLAR CORONAS SPACEBORNE ASTRONOMY MIXING HEIGHT . . SOLAR CORONA STELLAR INTERIORS ... CORONAL LOOPS COSMlC DUST RT CHROMOSPHERE GS PARTICLES SOLAR FLARES CONVECTION CURRENTS . DUST SOLAR LIMB RT AIR CURRENTS . . COSMIC DUST BENARD CELLS . . . INTERPLANETARY DUST ELECTRON BUNCHING CORONAS . . . . METEOROID DUST CLOUDS FLUID FLOW GS CORONAS . . . . ZODIACAL DUST FREE CONVECTION . ELECTRIC CORONA AT INTERGALACTIC MEDIA MIXING HEIGHT . STELLAR CORONAS INTERSTELLAR MATTER RAYLEIGH-BENARD CONVECTION . . SOLAR CORONA METEOROIDS SOLAR GRANULATION . . . CORONAL HOLES MICROMETEORITES VERTICAL AIR CURRENTS . . . CORONAL LOOPS MICROMETEOROIDS RT ELECTRIC ARCS MOLECULAR CLOUDS COOL STARS ELECTRIC DISCHARGES ORGANIC SOLIDS GS CELESTIAL BODIES HALOS REFLECTION NEBULAE . STARS IONIZATION SPACE DEBRIS . . LATE STARS SOLAR SPECTRA TERRESTRIAL DUST BELT CYRlLLlD METEOROIDS

cosulc m-(WNZ) COSMIC RAYS-(WNT:) cosuo~~~-(~NZj VENUS FLY TRAP ROCKET VEHICLE . . COSMlC RAY SHOWERS WHITE HOLES (ASTRONOMY) . . GALACTIC COSMlC RAYS COSUIC GAMMA RAY BURSTS . . GAMMA RAY BURSTS Do COS)IWJS USE GAMMA RAY BURSTS . . PRIMARY COSMIC RAYS SN (USE OF A MORE SPECIFIC TERM IS . . . SOLAR COSMIC RAYS RECOMMENOEPCONSULT THE TERMS COSMIC OISES . . SECONDARY COSMIC RAYS LISTED BELOW GS EXTRATERRESTRIAL MAlTER RT AEROSPACE ENVIRONMENTS RT COSMOS SATELLITES . coswc QISES ALBEDO UNIVERSE . . INTERPLANETARY GAS ALPHA PARTICLES . . INTVISTrUAR GAS BIG BANG COSMOLOGY . . . NEUTRAL GASES CERENKOV RADIATIOU USE COMMIlTEE ON SPACE RESEARCH GASES CORPUSCULAR RADIATION . RAREFIED GASES DEUTERONS CRAB NEBULA . . COSUIC QISES ELECTROMAGNETIC RADIATION GS CELESTIAL BODIES . . . INTERPUNETARY GAS ELECTRON ACCELERATION . NEBULAE . . . INTERSELIAR GAS ELECTRONS . . CRAB NEBULA . . . . NEUTRAL GASES EXTRATERRESTRIAL RADIATION RT ORION NEBULA RT COOLING FLOWS (ASTROPHYSICS) FORBUSH DECREASES SUPERNOVAE DEGENERATE MAlTER GALACTIC RADIATION TAURUS CONSTELLATION ELECTRON GAS GAMMA RAY TELESCOPES GAMMA RAYS INTERGALACTIC MEDIA CRATERING IONIZED GASES HELIOSPHERE INTERSTELLAR RADIATION GS CRATERING ION DENSITY (CONCENTRATION) . PROJECTILE CRATERING COSMIC NOISE MESONS RT CRATERS GS ELECTROMAGNETIC INTERFERENCE NEUTRONS EJECTA RADIO FREQUENCY INTERFERENCE . NUCLEAR PARTICLES IMPACT DAMAGE ELECTROMAGNETIC--- NOISE . . NUCLEI (NUCLEAR PHYSICS) MARS CRATERS . . . COSMIC NOISE TRACKS METEORITE CRATERS RT ALOUETTE PROJECT PARTICS PHOTONS METEORITIC DAMAGE BACKGROUND NOISE NUCLEAR EXPLOSIONS BACKGRWND RADIATION PROTONS CENTIMETER WAVES =RADIATION RADIATION BELTS CRATLIW ELECTROMAGNETIC NOISE RADIATIVE TRANSFER UF MAARS MEASUREMENT METEOR CRATERS GALACTIC RADIATION SINGLE EVENT UPSETS SOLAR RADIATION GS CRATERS GALACTIC RADIO WAVES . LUNAR CRATERS INTERSTELLAR RADIATION STELLAR RADIATION VLF EMISSION RECORDERS . . PTOLEMAEUS CRATER MICROWAVE EMISSION . . TYCHO CRATER MICROWAVES METEORITE CRATERS NOISE STORMS . PLANETARY CRATERS SOLAR RADIATION COSMlC X RAYS . . MARS CRATERS SOLAR RADIO EMISSION GS ELECTROMAGNETIC RADIATION RT CALDERAS . X RAYS CONES (VOLCANOES) COSMIC PLASMA . . COSMIC X RAYS CRATERING GS EXTRATERRESTRIAL MATTER IONIZING RADIATION NECTA . COSMIC PLASMA . X RAYS IMPACT DAMAGE PARTICLES . . COSMIC X RAYS SATELLITE SURFACES . CHARGED PARTICLES RT EXTRATERRESTRIAL RADIATION GALACTIC RADIATION . . ENERGETIC PARTICLES CRITICAL FREQUENCIES . . . PLASMAS (PHYSICS) GAMMA RAY ASTRONOMY GAMMA RAY BURSTS GS FREQUENCIES .... COSMICPL*SYA . CRITICAL FREQUENCIES RT INTERGALACTIC MEDIA GAMMA RAYS X RAY ASTRONOMY RT LIGHT (VISIBLE RADIATION) INTERPLANETARY GAS RESONANT FREQUENCIES PLASMA CLOUDS X RAY BINARIES PLASMAPAUSE CRUSTAL DYNAMICS RELATIVISTIC PLASMAS co5IK)cnEwmy USE EARTH CRUST SOLAR WIND RT COSMOLOGY GEODYNAMICS STELLAR WINDS EXTRATERRESTRIAL MAlTER STRONGLY COUPLED PCASMAS GEOCHEMISTRY INTERSTELLAR CHEMISTRY CRUSTS METEORITIC COMPOSITION GS CRUSTS COSMIC RADIATION . LUNAR CRUST USE COSMlC RAYS . PLANETARY CRUSTS COSMOGONY . . EARTH CRUST COSMIC RADIO WAVES USE COSMOLOGY RT LUNAR MANTLE USE EXTRATERRESTRIAL RADIO WAVES PLANETARY MANTLES COSMOLOGY COSMIC RAY ALBEDO UF COSMOGONY CURVIUNEAR COORDINATES GS ALBEDO GS COSMOLOGY USE SPHERICAL COORDINATES . COSMIC RAY ALBEDO BIG BANG COSMOLOGY RT ABSORPTANCE HUBBLE DIAGRAM CYANIDE EMlSSlON r ABSORPTION . MISSING MASS (ASTROPHYSICS) USE CN EMISSION ATMOSPHERIC AlTENUATION RT ASTRONOMICAL MODELS EARTH ALBEDO ASTROPHYSICS CYCLOTRON RADIATION LUNAR ALBEDO COSMOCHEMISTRY GS ELECTROMAGNETIC RADIATION PRIMARY COSMIC RAYS DARK MATTER . NONTHERMAL RADIATION REFLECTANCE EXISTENCE . . CYCLOTRON RADIATION SECONDARY COSMIC RAYS GALACTIC EVOLUTION . ION CYCLOTRON RADIATION GRAND UNIFIED THEORY RT CHARGED PARTCLES GRAVlTlNOS COSMIC RAY SHOWERS LARMOR PRECESSION HUBBLE CONSTANT LARMOR RADIUS UF MOLIERE FORMULA LOCAL GROUP (ASTRONOMY) z RADIATION GS IONIZING RADIATION MASS DISTRIBUTION COSMIC RAYS NAKED SlNGULARlTlES . . COSMIC RAY SHOWERS PLANETARY EVOLUTION CYGNUS CONSTELLATION RT ' AUGER EFFECT PROTOPLANETS GS CONSTELLATIONS m CASCADES RED SHIFT . CYGNUS CONSTELLATION ELECTRON PHOTON CASCADES STAR DISTRIBUTION RT GELESTIAL BODIES SECONDARY COSMIC RAYS STAR FORMATION CELESTIAL SPHERE zSHOWERS STELLAR EVOLUTION STARS STELLAR MASS ACCRETION COSMIC RAYS STRING THEORY CYRlLLlD METEOROIDS UF COSMIC RADIATION SUPERGRAVITY GS CELESTIAL BODIES GS IONIZING RADIATION SUPERSYMMETRY METEOROID SHOWERS . COSMIC RAYS UNIVERSE . . CYRILUD METEOROIDS B LAYER

DECIMETER WAVES-(CONT.) DENSITY (RATEIAREA) RT MILLIMETER WAVES USE FLUX DENSITY . . BOLIDES PLANETARY RADIATION . . . CYMUD ,wrnORolDs SOLAR RADIO EMISSION DENSITY WAVE MODEL , FIT NATURAL SATELLITES ULTRAHIGH FREQUENCIES GS MODELS . ASTRONOMICAL MODELS DEEP SPACE . . DENSITY WAVE MODEL GS ENVIRONMENTS AT GALACTIC STRUCTURE . AEROSPACE ENVIRONMENTS MASS DISTRIBUTION . . BEeP SPACE SPIRAL GALAXIES . . . INTERPLANETARY SPACE WAVE EQUATIONS . . . INTERSTELM SPACE D LAYER . EXTRATERRESTRIAL ENVIRONMENTS MSCENT TRAJECTORIES USE D REGION . . WPSPACE GS TRAJECTORIES . . . INTERPLANETARY SPACE . DESCENT TRAJECTORIES . . . INTERSTELLAR SPACE . . REENTRY TRAJECTORIES D LINES RT CISLUNAR SPACE RT ASCENT TRAJECTORIES GS SPECTRA FRICTIONLESS ENVIRONMENTS ATMOSPHERIC ENTRY . RADIATION SPECTRA LONG DURATION SPACE FLIGHT BALLISTIC TRAJECTORIES . . ELECTROMAGNETIC SPECTRA =SPACE COASTING FLIGHT . . . LINE SPECTRA FALLING . . . . D LINES DEGENERATE MARER FLIGHT MECHANICS RT ABSORPTION SPECTRA MANNED REENTRY EMISSION SPECTRA GS MATTER (PHYSICS) . DEGENERATE MATTER MIDCOURSE TRAJECTORIES H LINES MISSILE TRAJECTORIES SOLAR SPECTRA AT ANTIMATTER ASTROPHYSICS PARABOLIC FLIGHT BLACK HOLES (ASTRONOMY) REENTRY D REGION COSMIC GASES REENTRY GUIDANCE SN (ALTITUDE RANGE BETWEEN CRITICAL PRESSURE SPACECRAFT TRAJECTORIES APPROXIMATELY 50 AND 90 KM) DENSITY (MASSIVOLUMR TERMINAL GUIDANCE UF D LAYER MA~~ER GS EARTH ATMOSPHERE EF~ATERRESTRIAL FERMI-DIRAC STATISTICS DEUTERONS UPPER ATMOSPHERE . HlGH PRESSURE GS IONS EARTH IONOSPHERE . . NAKED SlNGULARlTIES DEUTERONS LOWER IONOSPHERE . . . . NEUTRON STARS PARTICLES D REWN . . . . NUCLEAR FUSION ELEMENTARY PARTICLES REGIONS . m PHYSICS DEUTERONS D REGION . . . PULSARS RT ALPHA PARTICLES ROTATING MATTER COSMIC RAYS DARK MATTER STELLAR CORES DEUTERIUM PLASMA GS EXTRATERRESTRIAL MATTER STELLAR EVOLUTION PHOTOMAGNETIC EFFECTS . INTERSTELLAR MATTER STELLAR MASS PLASMAS (PHYSICS) . . DARK MARER SUPERMASSIVE STARS POMERANCHUK THEOREM MATTER (PHYSICS) WHITE DWARF STARS PROTONS . DARK MITER RT BARYONS DIAL SATELLITE COOLING FLOWS (ASTROPHYSICS) DEIMOS GS ARTIFICIAL SATELLITES COSMOLOGY GS CELESTIAL BODIES SCIENTIFIC SATELLITES GALACTIC EVOLUTION . NATURAL SATELUTES DIAL SATELUTE INTERGALACTIC MEDIA . . MARS SATELLITES . . RT AERONOMY MISSING MASS (ASTROPHYSICS) . . . DEIUOS ASTRONOMICAL PHOTOMETRY NEUTRINOS RT CHARON EUROPEAN SPACE PROGRAMS UNIVERSE MARS (PLANET) PHOBOS SATELLITE-BORNE INSTRUMENTS DAYGLOW DICHOTOMIES GS ATMOSPHERIC RADIATION DENSlTOMETERS SKY RADIATION GS MEASURING INSTRUMENTS GS CLASSIFICATIONS . HIERARCHIES . . DAYGLOW . DEWOMETERS . ELECTROMAGNETIC RADIATION . . MICRODENSITOMETERS . . DiCHOTOMlES . LIGHT (VISIBLE RADIATION) RT GAMMA RAY ABSORPTIOMETRY . . SKY RADIATION GRAVIMETERS NKERADIOMETERS . . . DAYGLOW OPTICAL EQUIPMENT UF DlCKE TYPE RADIOMETERS Rf GLARE OPTICAL MEASUREMENT GS MEASURING INSTRUMENTS LIGHT SOURCES OPTICAL MEASURING INSTRUMENTS . RADIATION MEASURING INSTRUMENTS SKY PHOTOMETERS . . ACTINOMETERS SOLAR RADIATION PHOTON ABSORPTIOMETRY . . . RADIOMETERS TWILIGHT GLOW TRANSMISSOMETERS . . DICKE RADIOMETERS ULTRAVIOLET RADIATION RT BOLOMETERS THERMOPILES DENSITY (NUMBERIVOLUME) DEBRIS GS DENSITY (NUMBERIVOLUME) GS DEBRIS DlCKE TYPE RADIOMETERS . METEOROID CONCENTRATION USE DlCKE RADIOMETERS . SPACE DEBRIS . PACKING PENSITY RT EJECTA . PARTICLE OENSITY (CONCENTRATION) ENVIRONMENT EFFECTS . . ELECTRON DENSITY DIFFRACTION TELESCOPES FRAGMENTS (CONCENTRATION) USE SPECTROSCOPIC TELESCOPES GLACIAL DRIFT . . . CARRIER DENSITY (SOLID STATE) POLLUTION . . . ELECTRON DENSITY PROFILES DIFFUSE RADIATION r RADIOACTIVE DEBRIS . . . IONOSPHERIC ELECTRON DENSITY UF LUNAR SCATTERING SCRAP . . . MAGNETOSPHERIC ELECTRON RT HEAT TRANSFER WASTES DENSITY LIGHT SCATTERING . . ELECTRON DISTRIBUTION POINT SOURCES DECAMETRIC WAVES . . . ELECTRON DENSITY PROFILES x RADIATION GS ELECTROMAGNETIC RADIATION . ION DENSITY (CONCENTRATION) SPECULAR REFLECTION RADIO WAVES . . . IONOSPHERIC ION DENSITY . DECAMETRIC WAVES . . . MAGNETOSPHERIC ION DENSITY DlONE RT CORONAL HOLES . . . . MAGNETOSPHERIC PROTON GS CELESTIAL BODIES HlGH FREQUENCIES DENSITY . NATURAL SATELLITES VERY HlGH FREQUENCIES . . . PROTON DENSITY . ICY SATELLITES (CONCENTRATION) DlONE DECIMETER WAVES . . . MAGNETOSPHERIC PROTON SATURN SATELLITES GS ELECTROMAGNETIC RADIATION DENSITY DIONE . RADIO WAVES . . PLASMA DENSITY RT SATURN (PLANET) . . SHORT WAVE RADIATION . SPACE DENSITY . . . MICROWAVES RT ATMOSPHERIC DENS;! DISCOVERING . . . . DECIMETER WAVES m DENSITY USE EXPLORATION EARLY APOLLO SURFACE EXPERIMENTS PACKAGE

DWARF NOVAE DlSK GALAXIES mR-FUEAU EiWCT-(WNX) . DOPPLER-FUEAU EFFECT GS CELESTIAL BODIES GS CELESTIAL BODIES . STARS . GALAXIES RT -EFFECTS FlZEAU EFFECT . . DOUBLE STARS DlSK GALAXIES . . . BINARY STARS RT ANDROMEDA GALAXY FREQUENCY SHlFT RADAR NAVIGATION . . . . ECLIPSING BINARY STARS ASTROPHYSICS . . . . . DWARF NOVAE BARRED GAUXIES RED SHlFT STELLAR MOTIONS . . MAIN SEQUENCE STARS ELLIPTICAL GALAXIES . . . DWARF STARS GALACTIC CLUSTERS . . . . DWARF NOVAE GALACTIC EVOLUTlON DOUBLE STARS . . VARIABLE STARS GALACTIC NUCLEI GS CELESTIAL BODIES . . . NOVAE GALACTIC ROTATION . STARS . . . DWARF NOVAE STARS . GALACTIC STRUCTURE . . DOUBLE RT HERCULES NOVA L&AL GROUP (ASTRONOMY) . . . BINARY STARS STELLAR MASS ACCRETION RADIO GALAXIES . . . . CATACLYSMIC VARIABLES STELLAR MASS EJECTION SPIRAL GALAXIES . . . . COMPANION STARS WHITE DWARF STARS STAR CLUSTERS . . . . . NEMESIS (STAR) VIRGO GALACTIC CLUSTER . . . . ECLIPSING BINARY STARS . . . . . DWARF NOVAE DWARF STARS GS CELESTIAL BODIES DISTANCE . . . . . LAMBDA TAURl STARS . . . ZETA AURIGAE STAR STARS GS DISTANCE . MAIN SEQUENCE STARS . DEBYE LENGTH . . . . SIGMA ORIONIS . . . SYMBIOTIC STARS . DWARF STARS . DIFFUSION LENGTH . . . . DWARF NOVAE . MISS DISTANCE RT ASTROMETRY STELLAR MOTIONS . . . . FLARE STARS . OPTICAL SLANT RANGE . . . . RED DWARF STARS , RADAR RANGE RT CATACLYSMIC VARIABLES . RADIO RANGE DOVAP F STARS . RANGE AND RANGE RATE TRACKING USE DOPPLER EFFECT G STARS , REENTRY RANGE K STARS RT AIRCRAFT PERFORMANCE DRACONIO Iurnmaw LATE STARS AiRCRAFT SPECIFICATIONS GS CELESTIAL BODIES NEMESIS (STAR) ALTITUDE , METEOROID SHOWERS SUBDWARF STARS DEPTH . . DRACON1D METEOROIDS SUBGIANT STARS DIMENSIONS . METEOROIDS WHITE DWARF STARS FOCUSING . . DRACONID MflEOROlDS GEOMETRY RT GIACOBINI-ZINNER COMET HEIGHT DYNAMO THEORY LENGTH RT EARTH CORE POSITION (LOCATION) DURATION GEOMAGNETISM PROXIMITY USE TIME TELLURIC CURRENTS RADAR NAVIGATION mTHEORlES s RANGE DUST RANGE (EXTREMES) GS PARTICLES TAKEOFF RUNS . wm a TRAVEL . . COSMIC DUST . . . INTERPLANETARY DUST a DISTURBANCES . . . . METEOROID DUST CLOUDS SN (USE OF A MORE SPECIFIC TERM IS . . . . . ZODIACAL DUST E LAYERS RECOMMENDED-CONSULT THE TERMS . . LUNAR DUST USE E REGION LISTED BELOW . . TERRESTRIAL DUST BELT RT BURSTS RT AEROSOLS E REGION DISORDERS AIR POLLUTION SN (ALTITUDE RANGE BETWEEN ELECTROMAGNETIC INTERFERENCE AITKEN NUCLEI APPROXIMATELY 90 AND 100 KM) IONOSPHERIC DISTURBANCES CLEANING UF E LAYERS IONOSPHERIC STORMS m CLOUDS NIGHT E LAYER MAGNETIC DISTURBANCES COMBUSTION PRODUCTS GS EARTH ATMOSPHERE PERTURBATION CONTAMINANTS . UPPER ATMOSPHERE RADIO AURORAS D~RT . . EARTH IONOSPHERE RADIO BURSTS m DISPERSION . . . E REGION SOLAR ACTIVITY DISPERSIONS . . . . E-1 LAYER STORMS FUMES . . . . E-2 LAYER SUDDEN IONOSPHERIC DISTURBANCES PARTICULATES . . . . SPORADIC E LAYER VORTICES POLLEN REGIONS POWDER (PARTICLES) . E REGION DIURNAL VARIATIONS R CORONAE BOREALIS STARS . E-1 LAYER GS VARIATIONS SANDS . . E-2 LAYER PERIODIC VARIATIONS SMOKE . . SPORADIC E LAYER DIURNAL VARIATIONS SPACE DEBRIS RT LOWER IONOSPHERE RT CYCLES UPPER IONOSPHERE DARKNESS DUST COLLECTORS DAYTIME GS ACCUMULATORS E-1 LAYER MAGNETIC VARIATIONS . DUST COLLECTORS GS EARTH ATMOSPHERE NIGHT SEPARATORS . UPPER ATMOSPHERE NOCTURNAL VARIATIONS . DUST COLLECTORS EARTH IONOSPHERE TROPOPAUSE RT AIR FILTERS . . . E REGION WlND VARIATIONS ELECTROSTATIC PRECIPITATORS . . . . E-1 LAYER EXHAUST SYSTEMS REGIONS DOPPLER EFFECT PRECIPITATORS . E REGION E-1 LAYER UF WVAP . . STELLAR DOPPLER SHlFT DUST STORMS RT SPORADIC E LAYER GS DOPPLER EFFECT GS STORMS . DOPPLER-FIZEAU EFFECT . STORMS (METEOROLOGY) E-2 LAYER RT =EFFECTS. - . DUST STORMS GS EARTH ATMOSPHERE ELASTIC WAVES RT ATMOSPHERIC ELECTRICITY . UPPER ATMOSPHERE ELECTROMAGNETIC RADIATION ATMOSPHERIC PHYSICS . EARTH IONOSPHERE FIZEAU EFFECT MARS (PLANET) . . . E REGION FREQUENCY SHlFT MARS ENVIRONMENT . . . . E-2 LAYER OPTICAL HETERODYNING MARS SURFACE REGIONS RADIAL VELOCITY WlND EFFECTS . E REGION RED SHlFT . . E-2 LAYER SATELLITE DOPPLER POSITIONING DWARF GALAXIES FIT SPORADIC E LAYER STELLAR MOTIONS GS CELESTIAL BODIES . GALAXIES EARLY APOLLO SURFACE EXPERIMENTS DOPPLER-FIZEAU EFFECT . . DWARF GALAXIES PACKAGE GS DOPPLER EFFECT RT LOCAL GROUP (ASTRONOMY) use EASEP EARLY STARS

EARLY STARS EMC~~ATIIIOSP~ERE-(WNX) EARTH uta~-(CONz) GS CELESTIAL BODIES EARTH MAGNETOSPHERE PLANETARY LlMB . STARS ENVIRONMENTS . . EARLY STARS GEOPOTENTIAL HEIGHT EARTH MAGNETOSPHERE . . . HOT STARS GLOBAL AIR POLLUTION GS ENVIRONMENTS . . . . A STARS GREENHOUSE EFFECT . EARTH MAGNETOSPHERE . . . . B STARS METEOR TRAILS . . GEOMAGNETIC TAIL . . . . . SIGMA ORIONIS OPEN PROJECT . . MAGNETOPAUSE . . . . BLUE STARS PLANETARY ATMOSPHERES . . MAGNETOSHEATH . . . . 0 STARS PLASMASPHERE RT AMPTE (SATELLITES) . . . . WHITE DWARF STARS RADIATION BELTS BARIUM' ION CLOUDS . . . . WOLF-RAYET STARS SATELLITE ATMOSPHERES CHAPMAKFERRARO PROBLEM RT LATE STARS SCALE HEIGHT COROTATION MAIN SEOUENCE STARS SUPERROTATION EARTH ATMOSPHERE STAR FORMATION TELECONNECTIONS 1METEOROLOGYI EARTH IONOSPHERE EXOSPHERE EARTH (PLANET) GEOMAGNETIC HOLLOW UF WORUI URTn CORE GEOMAGNETISM GS CELESTIAL BODIES GS CORES GEOS SATELLITES (ESA) . PLANETS . PLANETARY CORES HETEROSPHERE . . TERRESTRIAL PLANETS . . EARTH CORE INTERNATIONAL MAGNETOSPHERIC . . . EARTH (PLANET) LITHOSPHERE EXPLORER RT EASTERN HEMISPHERE . EARTH CORE INTERNATIONAL MAGNETOSPHERIC GEODESY RT DYNAMO THEORY STUDY GEOELECTRICITY GEOPHYSICAL FLUIDS KP INDEX GEOGRAPHY STRUCTURAL PROPERTIES (GEOLOGY) MAGNETK FIELDS GEOLOGY MAGNETOSPHERE-IONOSPHERE GEOMAGNETISM URTnCRU8T COUPLING GEOPHYSICS UF CRUSTAL DYNAMICS a MAGNETOSPHERES mGLOBES GS CRUSTS NEUTRAL SHEETS PLANETARY CRATERS . PLANETARY CRUSTS OPEN PROJECT POLAR CAPS . . EARTH CRUST PLANETARY MAGNETOSPHERES TERRESTRIAL RADIATION UTHOSPHERE PLASMA CLOUDS WESTERN HEMISPHERE . EARTH CRUST PLASMAPAUSE RT COESITE PLASMASPHERE CONTINENTAL DRIFT EARTH AWW POLAR CUSPS CORE SAMPLING GS ALBEDO RADIATION BELTS CRATONS . EARTH ALBEDO RADIATION TRAPPING RT ABSORPTANCE CRUSTAL FRACTURES SATELLITE ATMOSPHERES EARTH MANTLE COSMIC RAY ALBEDO SCREEN EFFECT EARTH RADIATION BUDGET EARTHQUAKE DAMAGE SOLAR PLANETARY INTERACTIONS EARTH RADIATION BUDGET FOLDS (GEOLOGY) SOLAR TERRESTRIAL INTERACTIONS LUNAR CRUST EXPERIMENT SOLAR WIND VELOCITY MASSIFS EBERT SPECTROMETERS SPACE PLASMAS LUNAR ALBEDO PLATES (TECTONICS) THERMOSPHERE SAN ANDREAS FAULT REFLECTANCE STlSHOVlTE TERRESTRIAL RADIATION EARTH MANTLE STRUCTURAL PROPERTIES (GEOLOGY) UF MANTLE (EARTH STRUCTURE) EARTH ATMOSPHERE GS LITHOSPHERE EARTH -RE GS EARTH ATMOSPHERE . EARTH MANTLE . CHEMOSPHERE USE GEODESY PLANETARY MANTLES . FREE ATMOSPHERE . EARTH MANTLE . HETEROSPHERE EARTH IONOSPHERE RT COESITE . HOMOSPHERE SN (ALTITUDES ABOVE APPROXIMATELY 50 EARTH CRUST . LOWER ATMOSPHERE KM) LUNAR MANTLE . . TROPOSPHERE GS EARTH ATMOSPHERE PLATES (TECTONICS) . . . TROPOPAUSE . UPPER ATMOSPHERE REGOLITH . MIDDLE ATMOSPHERE . . EARTH IONQSPHERE STlSHOVlTE . . MESOSPHERE . . . E REGION STRUCTUAAL PROPERTIES (GEOLOGY) . . . MESOPAUSE . . . . E-1 LAYER SUBDUCTION (GEOLOGY) . . STRATOSPHERE . . . . E-2 LAYER . . OZONOSPHERE . . . . SPORADIC E LAYER m EARTH MOTION . . STRATOPAUSE . . . LOWER IONOSPHERE-~ - - SN (USE OF A MORE SPECIFIC TERM IS MIDLATITUDE ATMOSPHERE . . . . D REGION RECOMMENDED-CONSULT THE TERMS PRIMITIVE EARTH ATMOSPHERE . . . UPPER IONOSPHERE LISTED BELOW) . UPPER ATMOSPHERE . . . . F REGION RT EARTH MOVEMENTS . . EARTH IONOSPHERE . . . . F 1 REGION EARTH ORIENTATION . . . E REGION . . . . . F 2 REGION EARTH ROTATION . . . . E-1 LAYER ATMOSPHERIC IONIZATION POLAR WANDERING (GEOLOGY) . . . . E-2 LAYER CHEMOSPHERE SOLAR ORBITS . . . . SPORADIC E LAYER EARTH MAGNETOSPHERE . . . LOWER IONOSPHERE ELECTROJETS EARTH MOVEMENTS . . . D REGION EXOSPHERE GS EARTH MOVEMENTS . . UPPER IONOSPHERE HETEROSPHERE EARTHQUAKES . . . . F REGION HOMOSPHERE . LANDSLIDES . . . . . F 1 REGION INTASAT SATELLITE RT AVALANCHES . . . . . F 2 REGION ION CONCENTRATION CREVASSES . . EXOSPHERE ION DENSITY (CONCENTRATION) CRUSTAL FRACTURES . . THERMOSPHERE w IONOSPHERES z EARTH MOTION . . . TURBOPAUSE IONOSPHERIC PROPAGATION EARTHQUAKE DAMAGE RT ACOUSTIC SOUNDING IONOSPHERIC STORMS GEODYNAMICS AEROSPACE ENVIRONMENTS m LAYERS LARGE APERTURE SEISMIC ARRAY AIR MAGNETOSPHERE-IONOSPHERE SEISMIC WAVES AIR POLLUTION COUPLING SEISMOLOGY AIR QUALITY MESOSPHERE TECTONICS AIRGLOW MIDLATITUDE ATMOSPHERE TSUNAMI WAVES %ATMOSPHERES REGIONS ATMOSPHERIC CIRCULATION SATELLITE ATMOSPHERES EARTH ORBITAL ENVIRONMENTS ATMOSPHERIC COMPOSITION SHEAR LAYERS UF GEO ENVIRONMENTS ATMOSPHERIC ELECTRICITY THERMOSPHERE GEOSYNCHRONOUS EARTH ORBITAL ATMOSPHERIC ENTRY ENVIRONMENTS ATMOSPHERIC GENERAL CIRCULA1'ION EARTH LlMB LEO ENVIRONMENTS EXPERIMENT RT ASTRONOMY LOW EARTH ORelTAL ENVIRONMENTS AURORAS LIBRATION GS ENVIRONMENTS BIOASTRONAUTICS P LIMBS . AEROSPACE ENVIRONMENTS ELECTROMAGNETIC PULSES

EARTH ORBITAL ENVIRONMENTS-(CONZ) EARTIWERCURY TRAJECTORIES ECLIPSES-(CONZ) . . EARTH ORWTAL ENVIRONMENTS GS TRAJECTORIES UMBRAS . EXTRATERRESTRIAL ENVIRONMENTS . SPACECRAFT TRAJECTORIES . . EARTH ORBITAL ENVIRONMENTS . . INTERPLANETARY TRAJECTORIES ECUPSINQ BINARY STARS AT EXTRATERRESTRIAL RADIATION . . . EARTH-MERCURY TRAJECTORIES GS CELESTIAL BODIES SPACECRAFT GLOW RT ELLIPTICAL ORBITS . STARS ORBITAL MECHANICS . . DOUBLE STARS EARTH ORBITING SPACE STATIONS TRANSFER ORBITS . . . BINARY STARS USE SPACE STATIONS . . . . ECLIPSING BINARY STARS EARTHYOON SYSTEM . . . . . DWARF NOVAE RT CHARON . . . . . LAMBDA TAURl STARS EARTH ORm . . ZETA AURIGAE STAR SN (ORBITS AROUND THE EARTH) GRAVITATIONAL FIELDS . . . GRAVITATIONAL WAVES RT ACCRETION DISKS GS ORBITS CATACLYSMIC VARIABLES ORBITS LUNAR RETROREFLECTORS . EARTH ECUPSES nPOOEES MOON . . STELLAR OCCULTATION . . PERIGEES NATURAL SATELUTES ORBITAL MECHANICS SYMBIO'PIC STARS RT APOUO ASTEROIDS VARIABLE STARS CIRCULAR ORBITS SOLAR SYSTEM X RAY BINARIES CIRCUMLUNAR TRAJECTORIES mSYSTEMS ELLIPTICAL ORBITS TWO BODY PROBLEM EOUATORIAL ORBITS ECLIPTIC HANSEN LUNAR THEORY EARTH-MOON TRAJECTORIES RT PLANETS HlLL LUNAR THEORY GS TRAJECTORIES SOLAR ORBITS HlLL METHOD , SPACECRAFT TRAJECTORIES ZODIAC LUNAR ORBITS . . LUNAR TRAJECTORIES ORBITAL LIFETIME . . . EARlKYOOW TRAJECTORIES EINSTEIN OBSERVATORY ORBITAL MECHANICS RT APOUO 5 FLIGHT USE HEAO 2 PARKING ORBITS APOLLO 6 FLIGHT PLANETARY ORBITS APOUO 7 FLIGHT WECTA ~LARORBITS APOLLO 8 FLIGHT RT CRATERING SATEUITE ORBITS APOLLO 0 FUGHT CRATERS SPACECRAFT ORBITS APOLLO 10 FLIGHT MBRlS STATIONARY ORBITS AWLLO 11 FUGHT EJECTION TRANSFER ORBITS AWW12 FLIGHT FRAGMENTS TWENlY-FOUR HOUR ORBITS AWUO 13 FLIGHT IMPACT DAMAGE APOLLO 14 FLIGHT MARS CRATERS EARTH ORIENTATION APOLLO 15 FUGIIT METEORITE CRATERS RT EARTH AXIS AWLLO 16 FUGHT METEORITIC DAMAGE mEARTH MOTION APOUO 17 FUGHT PROJECTILE CRATERING EARTH ROTATION CIRCUMLUNAR TRAJECTORIES WOLF-RAYET STARS NUTATION CISLUNAR SPACE POLAR WANDERING (GEOLOGY) INTERPLANETARY TRAJECTORIES ELECTROMAGNETIC MELDS PRECESSION LUNAR FLIGHT GS ELECTROMAGNETIC FIELDS LUNAR ORBITS . FAR FIELDS MOON-EARTH TRAJECTORIES EARTH PLANETARY STRUCTURE . NEAR FIELDS PARKING ORBITS RT CONTINENTAL DRIFT . SYSTEM GENERATED GEOLOGY RENMNOUS TRAJECTORIES ELECTROMAGNETIC PULSES GEOPHYSICS ROUND TRIP TRAJECTORIES RT ABRIKOSOV THEORY HYDROLOGY TRANSFER ORBITS BIOMAGNETISM LITHOSPHERE BLACKOUT (PROPAGATION) OCEANOGRAPHY EARTKVENUS TRAJECTORIES ELECTROKINETICS PLANETARY COMPOSITION GS TRAJECTORIES ELECTROMAGNETISM PLANETARY STRUCTURE . SPACECRAFT TRAJECTORIES ELECTROMECHANICS PLATES (TECTONICS) . . EARTH-VENUS TRAJECTORIES EXTERNAL SURFACE CURRENTS PRIMITIVE EARTH ATMOSPHERE RT ~A~RONAUTICS FlELD MODE THEORY STRUCTURAL PROPERTIES (GEOLOGY) FLIGHT OmMlanm FlELD STRENGTH =STRUCTURES INTERPIANETARY FUGHT FlELD THEORY (PHYSICS) TECTONICS INTERPLANETARY TRAJECTORIES GRAND UNIFIED THEORY MISSIONS MAGNETIC FlELD CONFIGURATIONS omrrs MAGNETIC FlELD INVERSIONS EARTH RADIATION SPACE MISSIONS MAGNETIC FIELDS USE TERRESTRIAL RADIATION SPACE NAVIGATION QUANTUM ELECTRODYNAMICS SPACECRAFT REENTRY RECIPROCITY THEOREM EARTH RADIATION BUWET TRANSFER ORBITS SOLAR MAGNETIC FIELD GS ENERGY BUDGETS SOMMERFELD APPROXIMATION . EARTH RADIATION BUDGET EASEP SQUEEED STATES (QUANTUM THEC RT ATMOSPHERIC HEAT BUDGET UF EARLY APOLLO SURFACE EXPERlMENl STELLAR MAGNETIC FIELDS ATMOSPHERIC RADIATION PACKAGE UNIFIED FIELD THEORY rn BUOGETS GS PACKAGES WHISTLERS EARTH ALBEW . INSTRUMENT PACKAGES YANG-MILLS FIELDS EARTH RADIATION BUDGET . . EASEP EXPERIMENT RT mINSTRUMENTS ELECTROMAGNETIC INTERACTIONS HEAT BUDGET LUNAR EXPLORATION GS ELECTROMAGNETIC INTERACTIONS TERRESTRIAL RADIATION PAYLOADS . PHOTOPRODUCTION m SURFACES , PLASMA-ELECTROMAGNETIC EARTH ROTATION INTERACTION GS GYRATION ECHELETI'E GRATINGS . . LASER PLASMA INTERACTIONS . ROTATION GS GRATINGS (SPECTRA) RT BIOMAGNETISM . . EARTH ROTATION . ECHELEnr GRATINGS ELECTRODYNAMICS RT -EARTH MOTION RT DIFFRACTION ELECTROMAGNETIC ACCELERATION EARTH ORIENTATION REFLECTION ELECTROSTATICS SIDEREAL TIME ELEMENTARY PARTICLE INTERACTIO SUPERROTATION ECLIPSE PROJECT FEYNMAN DIAGRAMS GS PROGRAMS GRAND UNIFIED THEORY EARTH SHAPE . PROJECTS TINTERACTIONS USE GEODESY . . ECLIPSE PROJECT MESON-MESON INTERACTIONS PHOTONUCLEAR REACTIONS PLASMA RESONANCE EARTH-MARS TRAJECTORIES ECLIPSES GS ECLIPSES QUANTUM MECHANICS GS TRAJECTORIES UNIFIED FlELD THEORY SPACECRAFT TRAJECTORIES . LUNAR ECLIPSES WAVE INTERACTION INTERPLANETARY TRAJECTORIES SOLAR ECLIPSES EARTH-MARS TRAJECTORIES RT ECLIPSING BINARY STARS RT ELLIPTICAL ORBITS LUNAR SHADOW ELECTROMAGNETIC PULSES ORBITAL MECHANICS OCCULTATION GS ELECTROMAGNETIC 'RADIATION TRANSFER ORBITS PENUMBRAS . ELECTROMAGNETIC PULSES

EMlSSlON

ELECTRON DENSITY PROFILES-(CON%) ELECTRONS-(CON%) ELEMENTARY PARTICLES-(CON%) . PARTICLE DENSITY (CONCENTRATION) MAJORITY CARRIERS NUCLEAR RADIATION . . ELECTRON DENSITY m MATERIALS NUCLEI (NUCLEAR PHYSICS) (CONCENTRATION) MINORITY CARRIERS PARTIC~EACCELERATORS . . . ELECTRON DENSITY PROFILES MUONIUM POMERANCHUK THEOREM . . ELECTRON DISTRIBUTION N-NPE SEMICONDUCTORS POSITRON ANNIHILATION . . . ELECTRON DENSITY PROFILES NUCLEAR RADIATION QUANTUM THEORY DISTRIBUTION (PROPERTY) POMERANCHUK THEOREM RADIATION BELTS . ELECTRON DISTRIBUTION QUANTUM NUMBERS ELECTRON DENSITY PROFILES . . RADIATION BELTS ELEVATION ANQLE GRADIENTS SEMICONDUCTORS (MATERIALS) UF ALMUCANTAR eLem . DENSITY PROFILES SUHL EFFECT GS GEOMETRY RT ANGULAR DISTRIBUTION EUCLIDEAN GEOMETRY ATMOSPHERIC ELECTRICITY . ANGLES (GEOMETRY) ATMOSPHERIC IONIZATION ELECTROSTATIC PIASMA . . USE PlASMAS (PHYSICS) . . . ELEVATION MLE RT ALTITUDE ELECTRON DETECTORS AZIMUTH USE ELECTRON COUNTERS ELEMENTARY PARTICLES DATUM (ELEVATION) GS PARTICLES FIELD OF VIEW ELECTRON DISTRIBUTION . ELEMENTARY PARTICLES LOOK ANGLES (TRACKING) GS DENSITY (NUMBERIVOLUME) . . ANTIPARTICLES TOPOGRAPHY . PARTICLE DENSIN (CONCENTRATION) . . . ANTINEUTRINOS ELECTRON OlSTRlBUTION . . . ANTINUCLEONS . . ELLIPTICAL GALAXIES ELECTRON DENSITY PROFILES . . . ANTIPROTONS . . . GS CELESTIAL BODIES DISTRIBUTION (PROPERTY) . . . POSITRONS GALAXIES . ELECTRON DISTRISUTION . . BETA PARTICLES . BOSONS . . ELLIPTICAL GALAXIES . . ELECTRON DENSITY PROFILES . . RT DISK GALAXIES RT CHARGE DISTRIBUTION . . . ALPHA PARTICLES CURRENT DISTRIBUTION . . . MESONS GALACTIC CLUSTERS THOMAS-FERMI MODEL . . . . ETA-MESONS LOCAL GROUP (ASTRONOMY) VERTICAL DISTRIBUTION . . . . KAONS SPIRAL GALAXIES . . . MESON RESONANCE STAR CLUSTERS . VIRGO GALACTIC CLUSTER ELECTROW RUX . . . . . X MESONS USE ELECTRONS . . . . MUONS FLUX (RATE) . . . . PIONS ELLIPTICAL OR- '. . . . VECTOR MESONS UF HOHMANN TRAJECTORIES ELECTRON FLUX DENSITY . . . . . RHO-MESONS HOHMANN TRANSFER ORBITS GS ORBITS SN (LIMITED TO ELECTRON EMISSION OR . . . . . SIGMA-MCSONS DETECTION RATE PER UNIT AREA) . . . PHOTONS . ELLIPTICAL ORBITS UF ELECTRON INTENSITY . . . . LIGHT BEAMS . . APHELIONS GS RATES (PER TIME) . . . XI HYPERONS . . APOGEES . FLUX DENSITY . . DEUTERONS . . PERIGEES . . RADIANT FLUX DENSITY . . FERMIONS . . . PERIHELIONS . . . PARTICLE FLUX DENSITY . . . BARYONS . . TRANSFER ORBITS . . . . ELECTRON FLUX DENSITY . . . . HYPERONS . . . INTERPLANETARY TRANSFER

RT IRRADIANCE . . . . . XI HYPERONS ORBITS RADIANCY . . . . OMEGA-MESONS + RT APSIDES SOLAR FLUX DENSITY . . . . RHO-MESONS CIRCULAR ORBITS . . . . SIGMA-MESONS EARTH ORBITS EARTH-MARS TRAJECTORIES ELECTRON INTENSITY . . . ETA-MESONS EARTH-MERCURY TRAJECTORIES USE ELECTRON FLUX DENSITY . . . LEPTONS . . . . ANTINEUTRINOS ECCENTRIC ORBITS MUONS ELLIPTICITY ELECTRON RADIATION ...... NEUTRINOS EQUATORIAL ORBITS SN (LIMITED TO RADIATION CONSISTING OF SOLAR NEUTRINOS EULER-LAMBERT EQUATION ELECTRONS-EXCLUDES . . . . . MESON RESONANCE LUNAR ORBITS ELECTROMAGNETIC RADIATION) ... NEUTRONS ORBITAL MECHANICS GS PARTICLES ...... COLD NEUTRONS PAS . CORPUSCULAR RADIATION . . . . FAST NEUTRONS PLANETARY ORBITS . . ELECTRON RADIATION .... PHOTONEUTRONS POLAR ORBITS . . . BETA PARTICLES SOLAR NEUTRONS SATELLITE ORBITS ELECTRON BEAMS ...... THERMAL NEUTRONS SOLAR ORBITS . . . . RELATIVISTIC ELECTRON BEAMS PROTONS SPACECRAFT ORBITS RT BREMSSTRAHLUNG ...... RECOIL PROTONS NUCLEAR RADIATION . EMANATION PLASMA RADIATION . . . . SOLAR PROTONS . . GLUONS USE EMISSION PROTON IRRADIATION . . GRAVlTlNOS T RADIATION GRAVITONS RADIATION EFFECTS . EMISSION . . HADRONS UF EMANATION . . . BARYONS GS EMISSION ELECTRON TELESCOPES . . . . OMEGA-MESONS USE PARTICLE TELESCOPES . ACOUSTIC EMISSION . . . . RHO-MESONS EXHAUST EMISSION . . . . SIGMA-MESONS LIGHT EMISSION ELECTRONS . . . MESCJNS . INCANDESCENCE UF ELECTRON FLUX . . . . KAONS . . LUMINESCENCE NONRELATlVlSTlC ELECTRONS . . . . MUONS . BIOLUMINESCENCE GS PARTICLES ...... OMEGA-MESONS . . . CATHODE GLOW . CHARGED PARTICLES . . . . VECTOR MESONS . . . CATHODOLUMINESCENCE . . ENERGETIC PARTICLES . . . . . RHO-MESONS . . . CHEMILUMINESCENCE . . . ELECTRONS . . . . . SIGMA-MESONS . . . ELECTROLUMINESCENCE . . . . CONDUCTION ELECTRONS . . MAGNETIC MONOPOLES . . . FLUORESCENCE . . . . HIGH ENERGY ELECTRONS . . NUCLEONS . . . LASER INDUCED FLUORESCENCE . . . . HOT ELECTRONS . . PARTONS ...PHOSPHORESCENCE . . . . N ELECTRONS . . QUARKS . . . . RESONANCE FLUORESCENCE . . NEGATRONS . . . . TACHYONS . . . . X RAY FLUORESCENCE . . . . PI-ELECTRONS RT ATOMIC STRUCTURE . . . LUNAR LUMINESCENCE AT ACCEPTOR MATERIALS BUBBLE CHAMBERS . . . OPTICAL RESONANCE BETA PARTICLES CHARGED PARTICLES . . PHOTOLUMINESCENCE BOHR MAGNETON DE BROGLlE WAVELENGTHS . . . TRIBOLUMINESCENCE COSMIC RAYS GEOCYCLOTRONS . . . X RAY FLUORESCENCE DONOR MATERIALS HYPERNUCLEI SHOCK WAVE LUMINESCENCE ELECTRON ACCELERATION INSTANTONS . . SONOLUMINESCENCE ELECTRON MASS IONIZING RADIATION . . SPACECRAFT GLOW EXCITONS NEUTRON SCATTERING . . THERMOLUMINESCENCE HOLES (ELECTRON DEFICIENCIES) NUCLEAR INTERACTIONS MICROWAVE EMISSION LEWIS BASE NUCLEAR PARTICLES PARTICLE EMISSION EMISSION SPECTRA

EM~SION-(CONZ) st'Ea-(CONT) ENERGETIC PARTICLES-(CONX) . . ELECTRON EMISSION SPECTRAL SIGNATURES . . . . NONUNIFORM PLASMAS . . REU) EMISSION SPECTRUM ANALYSIS . . . . OXYGEN PLASMA . . . PHOTOELECTRIC EMISSION SPONTANEOUS EMISSION . . . . RAREFIED PLASMAS . . . SECONDARY EMISSION STELLAR SPECTRA . . . . RELATIVISTIC PLASMAS . . IOPd EMISSION SWAN BANDS . . . . ROTATING PLASMAS . . NEUTRON EMISSION SYMBIOTIC STARS . . . . SEMICONDUCTOR PLASMAS . . THERMKIIUIC EMISSION ULTRAVIOLET SPECTRA . . . . SPACE PLASMAS . PHOTOIONIZATION VEGARDKAPLAN BANDS . . . . . SOLAR WIND . RADIO EMISSION VISIBLE SPECTRUM . . . . . STELLAR WINDS . . CN EMISSION X RAY STARS . . . . SPHERICAL PLASMAS . . HYDROXYL EMISSION X RAYS . . . . THERMAL PLASMAS . . RADIO BURSr9 . . . . MROIDAL PLASMAS . . . SOLAR RADIO BURSTS EYUSSIVIW AT GALACTIC COSMIC RAYS . . . . TYPE 2 BURSTS UF PHOTOEMISWTTY RADIO JETS (ASTRONOMY) . . . . TYPE 3 BURSTS GS THERMODYNAMIC PROPERTIES SOLAR COSMIC RAYS . . . TYPE 4 BURSTS . THERMOPHYSICAL PROPERTIES . . . . TYPE 5 BURSTS . . EMISSIVIW ENERGY DENSITY . . XLAR RADIO EMISSION RT BLACK BODY RADIATION USE FLUX DENSITY . . . SOLAR RADIO BURSTS BRIGHTNESS . . . . TYPE 2 BURSTS EMERGING TYPE 3 BURSTS ENERGY SPECTRA . . . . EMITTANCE GS SPECTRA . . . . TYPE 4 BURSTS HOHLRAUMS . . . . TYPE 5 BURSTS . ENERGY SPECTRA INCANDESCENCE . ELECTRONIC SPECTRA . SELF SUSTAINED EMISSION LUMINOSITY SPECTFIAL EMISSION ..NEUTRON SPECTRA . NONGRAY ATMOSPHERES RT ABSORPTION SPECTRA . SPONTANEOUS EMISSION NONGRAY GAS . STIMULATED EMISSION ELECTROMAGNETIC SPECTRA OPTICAL MEASUREMENT- -- . . WATER MASERS GAMMA RAY ASTRONOMY RADIANCE GRIST (TELESCOPE) . THERMAL EMISSION RADIANT FLUX DENSITY . . THERMIONIC EMISSION MASS SPECTRA STEFAKBOCTZMANN LAW MOLECULAR SPECTRA RT AIRGLOW SURFACE PROPERTIES ATOMIC RECOMBlNATlON PLASMA SPECTRA TEMPERATURE POWER SPECTRA BURSTS THERMAL EMISSION DECAY RADIATION SPECTRA m DISCHARGE SHOCK SPECTRA EFFLUX EMISSOGRAPHS SPECTRAL ENERGY DISTRIBUTION EJECTION USE ACTINOMETEQS SPECTROPHOTOVOLTAICS EMERGING RECORDING INSTRUMENTS VIBRATIONAL SPECTRA EMITTERS EXCITATION ENCELADUS ENWATITE IONIZING RADIATION GS CELESTIAL BODIES GS CHALCOGENIDES IRRADIATION . NATURAL SATELLITES . OXIDES NUCLEAR REACTIONS . . ICY SATELLITES . . PYROXENES PAIR PRODUCTION . . . ENCELADUS . . . ENSTATITE QUANTUM THEORY . . SATURN SATELLITES MAGNESIUM COMPOUNDS m RADIATION . . . ENCELADUS . ENSTArn RADIOACTIVE DECAY RT SATURN (PLANET) MINERALS RADIOACTIVITY . PYROXENES RELEASING ENCKE COMET . . ENSTArn SELECTION RULES (NUCLEAR PM'SICS) GS CELESTIAL BODIES SILICON COMPOUNDS SPUTTERING . COMETS . SILICATES . . ENCKE COMET . . PYROXENES EMISSION SPECTRA . . . ENSTATrnE RT CHONDRULE SN (LIMITED TO ELECTROMAGNETIC ENERGETIC PARTICLES IGNEOUS ROCKS RADIATION OF ANY WAVELENGTH GS PARTICLES REGOLITH EMl'llTD FROM EXCITED . CHARGED PARTICLES MATTER-EXCLUDES PARTICLE ROCKS . . ENERGETIC PARTICLES SOILS SPECTRA) . . . ELECTRONS GS SPECTRA . . . . CONDUCTION ELECTRONS . RADIATION SPECTRA . . . . HlGH ENERGY ELECTRONS ta ENTRY . . EMISSION SPECTRA . . . . HOT ELECTRONS SN (USE OF A MORE SPECIFIC TERM IS RT ABSORPTION SPECTRA . . . . N ELECTRONS RECOMMENDED-CONSUL T THE TERMS ATOMIC RECOMBINATION . . . . NEGATRONS LISTED BELOW) BALMER SERIES . . . . PI-ELECTRONS RT ATMOSPHERIC ENTRY CONTINUOUS RADIATION . . . NUCLEI (NUCLEAR PHYSICS) REENTRY D LINES . . . . EVEN-EVEN NUCLEI ELECTROMAGNETIC SPECTRA . . . . HEAVY NUCLEI EPHEMERIDES ELECTRON SPECTROSCOPY . . . . HYPERNUCLEI GS EPHEMERIDES ELECTRONIC SPECTRA . . . . ODD-EVEN NUCLEI PLANET EPHEMERIDES FLAME SPECTROSCOPY . . . . ODD-ODD NUCLEI RT ASTRONOMICAL CATALOGS GAMMA RAY SPECTRA . . . PLASMAS (PHYSICS) CELESTIAL MECHANICS GAMMA RAYS . . . . ARGON PLASMA EPHEMERIS TlME H ALPHA LlNE . . . . dETA PARTICLES ORBITS H BETA LlNE . . . . BOUNDARY LAYER PLASMAS POSITION (LOCATION) H GAMMA LINE . . . . COLD PLASMAS H I1 REGIONS . . . . COLLlSlONAL PLASMAS EPHEMERIS TIME H LINES . . . . . STRONGLY COUPLED PLASMAS GS TlME HYDROXYL EMISSION . . . . COLLISIONLESS PLASMAS . EPHEMERIS TlME INFRARED SPECTRA . . . . COSMIC PLASMA RT EPHEMERIDES K LINES . . . . CYLINDRICALPLASMAS UNIVERSAL TlME LlNE SPECTRA . . . . DENSE PLASMAS LYMAN SPECTRA . . . . . PLASMA FOCUS EQUATIONS OF MOTION MOLECULAR SPECTRA . . . . . STRONGLY COUPLED PLASMAS UF MOTION EOClATlONS MOLECULAR SPECTROSCOPY . . . . ELECTRON PLASMA GS EQUATIONS OF MOTION NUCLEAR RADIATION . . . . ELLIPTICAL PLASMAS OPTICAL EMISSION SPECTROSCOP EULER EQUATIONS OF MOTION . . . . HELIUM PLASMA KINETIC EQUATIONS OPTICAL TRANSITION . . . . HIGH TEMPERATURE PLASMAS PASCHEN SERIES HYDRODYNAMIC EQUATIONS . . . . HYDROGEN PLASMA HELMHOLTZ VORTlClTY EClUATlON PHOTOLUMINESCENT BANDS . . . . . DEUTERIUM PLASMA PLASMA SPECTRA KINEMATIC EQUATIONS . . . LASER PLASMAS NAVIER-STOKES EQUATION RAMAN SPECTRA . . . . METALLIC PLASMAS RYDBERG SERIES REYNOLDS EOUATION . . . . . CESIUM PLASMA RT AUTONOMY SCHUMANN-RUNGE BANDS . . . . MICROPLASMAS BETHE-SALPETER EOUATION SOLAR SPECTRA . . . . NITROGEN PLASMA SOLAR SPECTROMETERS CELESTIAL MECHANICS . . . . NONEQUlLlBRlUM PLASMAS CLASSICAL MECHANICS EXPLORER 48 SATELLITE

EQUATIONS OF MOTlON-(wNr) EUROPEAN SPACE PROGRAMS-(CON~) EXOSAT SATEWTE-(CONT) COMPUTATIONAL FLUID DYNAMICS INTERNATIONAL SATELLITE GEODESY . . EXOSAT SArrLLITE CONTINUITY EQUATION EXPERIMENT ESA SPACECRAFT CONTROL MOMENT GYROSCOPES IRIS SATELLITES . ESA SATELLITES mDYNAMICS ITALIAN SPACE PROGRAM . . EXOSAT SATELLITE EINSTEIN EQUATIONS MARECS MARITIME SATELLITES RT ECCENTRIC ORBITS mEQUATIONS METEOSAT SATELLITE EUROPEAN SPACE PROGRAMS EQUILIBRIUM EQUATIONS OTS (ESA) LUNAR OCCULTATION HAMILTON-JACOB1 EQUATION QUASAT X RAY ASTRONOMY INERTIA PRINCIPLE SPACE MISSIONS X RAY SOURCES KINEMATICS SWEDISH SPACE PROGRAM USSAJOUS RGURES SWISS SPACE PROGRAM EXOSPHERE MACH INERTIA PRINCIPLE SYMPHONIE SATELLITES SN (ALTITUDES ABOVE APPROXIMATELY MOMENTS OF INERTIA U.S.S.R. SPACE PROGRAM MOTION AFTEREmCTS MO KMI GS EARTHATMOWHERE SPlNNlNG UNGUIDED ROCKET EUVE TRAJECTORY . UPPER ATMOSPHERE USE EXTREME ULTRAVIOLET EXPLORER . . EXOSPnERE STABIUTY SATELLITE SYSTEMS STABILITY RT EARTH IONOSPHERE TRAJECTORIES EARTH MAGNETOSPHERE EVECTION HETEROSPHERE TRAJECTORY ANALYSIS USE LUNAR ORBITS VARIABLE MASS SYSTEMS RADIATION BELTS ORBIT PERTURBATION THERMOSPHERE VON ZElPEL METHOD SOLAR GRAVITATION EXPEDITIONS EQUINOXES EVENlNa RT EXPLORATION RT SEASONS RT DAYTIME m MISSIONS SOUR POSlTlON NIGHT SPACE FLIGHT SOLSnCES SUNSET WINTER EXPLORATION m EVOLrnON UF DISCOVERING ESCAPE VELOCrrY SN (US.€ OF A MORE SPECIFIC TERM IS PROSPECTING UF PARABOLIC VELOCITY RECOMMENMPCONSULT THE TERMS GS EXPLORATION GS RATES (PER TIME) LISTED BELOW . LUNAR EXPLORATION . ESCAPE wLocrrr RT BIOGENY . MINERAL EXPLORATION VELrn CHEMICAL EVOLUTION . OIL EXPLORATION . ESCAPE VELOCITY EVOLUTION (DEVELOPMENT) . SPACE EXPLORATION RT mESCAPE EVOLUTlON (UBERATION) RT BOREHOLES HIGH SPEED EXISTENCE DETrCTlON HYPERBOLIC TRAJECTORIES DRILLING mHYPERVELOCITY EVOUmOW (DEVELOPMENT) EXAMINATION ORBITAL VELOCITY GS EVOLUTION (DEVELOPMENT) EXCAVATION PLANETARY GRAVITATION . BIOLOGICAL EVOLUTION EXPEDITIONS SCHWARZSCHILD METRIC . . ABIOGENESIS EXPERIMENTATION VELOCITY ERRORS . CHEMICAL EVOLUTION EXPLOITATION . GALACTIC EVOLUTION GEOLOGICAL SURVEYS ESCARPMENTS . LUNAR EVOLUTION GEOLOGY UF SCARPS . PLANETARY EVOLUTION GEOTHERMAL TECHNOLOGY GS LANDFORMS . STELLAR EVOLUTION INVESTIGATION . ESCARPMENT8 . . STAR FORMATION MINES (EXCAVATIONS) RT CLIFFS . . STELLAR MASS ACCRETION OSS-1 PAYLOAD SLOPES RT mBIOLOGY RESEARCH TOPCGRAPHY mDEVELOPMENT RESERVES mEW3LUTION SAMPLING EXTINCTION SPACE FLIGHT EUROPA GENE EXPRESSION SURVEYS GS CELESTIAL BODIES GENETICS UNDERGROUNO ACOUSTICS . NATURAL SATELLITES GROWTH . . ICY SATELLITES HEREDITY EXPLORER 11 !SATELLITE . . EUROPA INTERSTELLAR EXTINCTION UF GAMMA RAY ASTRONOMY EXPLORER . JUPITER SATELLITES ONTOGENY GS ARTIFICIAL SATELLITES . . . GAULEAN SATELLITES SPECIES DIFFUSION . SCIENTIFIC SATELLITES .... EUROPA EXPLORER SATELLITES AT CHARON . . EXISTENCE . . . EXPLORER 11 SATELLITE JUPITER (PLANET) RT COSMOLOGY RT JUNO 2 LAUNCH VEHICLE m EVOLUTION EUROPEAN SPACE PROGRAMS LlFE SPAN EXPLORER 18 SATELUTE GS PROGRAMS VALlOlTY UF IMP-A . SPACE PROGRAMS IMP-1 . . EUROPEAN SPACE PROGRAMS EXOBfOLOaY INTERPLANETARY EXPLORER FIT AEROSAT SATELLITES UF ASTROBIOLOGY S-74 SATELLITE AMPTE (SATELLITES) SPACE BIOLOGY GS ARTIFICIAL SATELLITES ARIANE LAUNCH VEHICLE RT AEROSPACE ENVIRONMENTS LUNAR SATELLITES AZUR SATELLITE APOLLO EXTENSION SYSTEM EXPLORER 18 SATELLITE COMMllTEE ON SPACE RESEARCH BIOASTRONAUTICS SCIENTIFIC SATELLITES COS-B SATELLITE .a BIOLOGY EXPLORER SATELLITES DIAL SATELLITE CARBONACEOUS METEORITES EXPLORER 18 SATELLITE EARTHNET CHEMICAL EVOLUTION INTERPLANETARY SPACECRAFT ESA SATELLITES ENVIRONMENT MODELS EXPLORER 18 SATELLITE ESRO 1 SATELLITE EXTRATERRESTRIAL LlFE LUNAR SPACECRAFT ESRO 2 SATELLITE LlFE SUPPORT SYSTEMS LUNAREXPLORER SATELLITES 18 SATELLITE ESRO 4 SATELLITE LUNAR ENVIRONMENT - EUROPA LAUNCH VEHICLES PANSPERMIA UNMANNED SPACECRAFT EUROPEAN COMMUNICAT~ONS PLANETARY ENVIRONMENTS SPACE PROBES SATELLITE SPACECRAFT CONTAMINATION EXPLORER 18 SATELLITE EUROPEAN SPACE AGENCY SPACECRAFT ENVIRONMENTS RT DELTA LAUNCH VEHICLE EXOSAT SATELLITE SPACECRAFT STERILIZATION FOREIGN POLICY EXPLORER 42 SATELLITE FRENCH SATELLITES EXOSAT SATELLITE USE UHURU SATELLITE FRENCH SPACE PROGRAMS UF HELOS (SATELLITE) GEOS SATELLITES fESAI. . HIGH ECCENTRIC LUNAR OCCULTATION EXPLORER 48 SATELLITE HEOS SATELLITES SATELLITE GS ARTIFICIAL SATELLITES HIPPARCOS SATELLITE GS ARTIFICIAL SATELLITES SCIENTIFIC SATELLITES INFRARED SPACE OBSERVATORY IISO) . ESA SATELLITES . EXPLORER SATELLITES INTERNATIONAL MAGNETOSPHERIC . . . EXOSAT SATELUTE . . . EXPLORER 48 SATELLITE STUDY . SCIENTIFIC SATELLITES RT SAS EXPLORER 49 SATELLITE

EXPLORER 411 SATEUrn-(WN~) EXTRATERRESTRIAL ENVIRONMENTS-(CONK) EXTRATERRESTRIAL RADUTION-(CONK) SAS-2 .... HEUUM HYDROGEN . . SOLAR CORPUSCULAR RADIATION ATMOSPHERES . . . SOLAR ELECTRONS EXPLORER 49 SATEUJlE . . . JUPITER ATMOSPHERE . . . SOLAR NEUTRINOS UF RADlO ASTRONOMY EXPLORER B . . . . MARS ATMOSPHERE . . . SOLAR NEUTRONS RADlO ASTRONOMY EXPLORER 2 . . . . MERCURY ATMOSPHERE . . . SOLAR PROTONS RAE B . . . . NEPTUNE ATMOSPHERE . . SOLAR COSMlC RAYS RAE 1 . . . . PLANETARY IONOSPHERES . . SOLAR RADIO EMlSSlON RAE 2 . . . . PLUTO ATMOSPHERE . . . SOLAR RADlO BURSTS GS ARTIFICIAL SATELLITES . . . . SATLJRN ATMOSPHERE . . . . TYPE 2 BURSTS . SCIENTIFIC SATELUTES . . . . URANUS ATMOSPHERE . . . . TYPE 3 BURSTS . . EXPLORER SATELLITES . . . . VENUS ATMOSPHERE . . . . TYPE 4 BURSTS . . . €xPLORLR 49 SATELUTE . . . . . VENUS CLOUDS . . . . TYPE 5 BURSTS RT DELTA LAUNCH VEHICLE . . . PLANETARY MAGNETOSPHERES . . SOLAR WIND . . SATELLITE ATMOSPHERES . . SOLAR X-RAYS EXPLORER 53 SATEUm: . . . LUNAR ATMOSPHERE . . SUNUGHT GS ARTIflClAL SATELLITES . . STEUAR ATMOSPHERES . STELLAR RADIATION . SCIENTIFIC SATELLITES . . . CHROMOSPHERE . . STELLAR WINDS . . EXPLORER SATELLITES . . . SOLAR ATMOSPHERE . ZODIACAL LIGHT . . . EXPLORER 53 SATELLITE RT AEROSPACE ENVIRONMENTS RT AEROSPACE ENVIRONMENTS OBSERVATORIES HIGH GRAVITY ENVIRONMENTS mAEROSPACE SCIENCES ASTRONOMICAL OBSERVATORIES LONG DURATION SPACE FLIGHT ATMOSPHERIC RADIATION . ASTRONOMICAL SATELLITES MERCURY SURFACE BACKGROUND RADIATION . . . SAS SPACE EXPLORATION CORPUSCULAR RADIATION . . . . EXPLORER 53 SATELUTE SPACECRAFT ENVIRONMENTS COSMIC RAYS RT SAS3 VENUS SURFACE COSMIC X RAYS EARTH ORBITAL ENVIRONMENTS EXTRATERRESTRIAL INTrUKiENCE ELECTROMAGNETIC NOISE EXPOS (SPACELAB PAYLOAD) ELECTROMAGNETIC RADIATION UF X RAY SPECTROWLARIMETRY GS INTELLIGENCE ELECTRON ACCELERATION PAYLOAD . EXTRATERRESTRIAL INTEUtQENCE EXTFtAGALACTIC RADlO SOURCES GS PAYLOADS RT INTERSTELLAR COMMUNICATION LIGHT (VISIBLE RADIATION) EXPOS (SPACEUB PAYLOAD) INTERSTELLAR TRAVEL . LYMAN ALPHA RADIATION RT EUROPEAN SPACE AGENCY PROJECT sm LYMAN BETA RADIATION SPACELAB SPACE COMMUNICATION UNlDEKnflED FLYING Ol3JECOS MICROWAVE EMISSION POLARIZED ELECTROMAGNETIC EXTARS RADIATION USE X RAY STARS EXTRATERRESTRIAL LIFE POLARIZED RADIATION GS UF!Z SCIENCES mRADIATION ETPENDU) WRATlOW SPACE FUQliT . EXTRATERRESTRIAL UfE RADIATION BELTS USE LONG DURATION SPACE FLIGHT RT AEROSPACE ENVIRONMENTS RADIATIVE TRANSFER BIOSATELLITES RADIO JETS (ASTRONOMY) EXTINCTION EXOBIOLOGY RADlO WAVES GS EXTINCTION GULUVER PROGRAM *RAYS . INTERSTELLAR EXTINCTION LIFE DETECTORS RELIC RADIATION RT EVOLUTION (DEVELOPMENT) SYNCHROTRON RADIATION EXTINGUISHING SYSTEM GENERATED FADING EXTRATERRESTRIAL MATIER ELECTROMAGNETIC PULSES FLUORESCENCE GS EXTRATERRESTRIAL MAlTER TERRESTRIAL RADIATION LASER INDUCED FLUORESCENCE . COSMIC GASES X RAYS NEMESIS (STAR) . . INTERPLANETARY GAS . . INTERSTELLAR GAS EXTRAGALACnC UOHT . . . NEUTRAL GASES EXTRATERRESTRIAL RADlO WAVES USE EXTRATERRESTRIAL RADIATION . COSMIC PLASMA UF COSMIC RADlO WAVES LIGHT (VISIBLE RADIATION) . INTERSTELLAR MAlTER GS ELECTROMAGNETIC RADIATION . . DARK MAlTER . RADlO WAVES EXTRAGALACTIC MEDIA . . INTERSTELLAR GAS . . EXTRATERRESTRIAL RADlO WAVES USE INTERGALACTIC MEDIA . . . NEUTRAL GASES . . . GALACTIC RADlO WAVES RT COSMOCHEMISTRY . . . RADlO BURSTS DEGENERATE MAlTER . . . . SOLAR RADlO BURSTS MAlTER (PHYSICS) . . . . . TYPE 2 BURSTS GS CELESTIAL BODIES VENUS FLY TRAP ROCKET VEHICLE . RADlO SOURCES (ASTRONOMY) . . . . . TYPE 3 BURSTS . . EXTRAGALACTIC RADIO SOURCES . . . . . TYPE 4 BURSTS . . . RADlO GALAXIES EXTRATERRESTRIAL RADIATION . . . . . TYPE 5 BURSTS . . . RADlO JETS IASTRONOMY) UF EXTRAGALACTIC LIGHT . . . SOLAR RADlO EMISSION RT BL IACERTAE OBJECTS SPACE RADIATION . . . . SOLAR RADlO BURSTS EXTRATERRESTRIAL RADIATION STELLAR WPPLER SHIFT . . . . . TYPE 2 BURSTS EXTRATERRESTRIAL RADlO WAVES GS EXTRATERRESTRIAL RADIATION . . . . . TYPE 3 BURSTS QUASARS . EXTRATERRESTRIAL RADlO WAVES . . . . . TYPE 4 BURSTS RADIATION SOURCES . . GALACTIC RADlO WAVES . . . . . TYPE 5 BURSTS RADlO ASTRONOMY . . . NORTH POLAR SPUR (ASTRONOMY) EXTRATERRESTRIAL RADIATION RADlO EMISSION . . RADlO BURSTS EXTRATERRESTRIAL RADlO WAVES . . . SOLAR RADlO BURSTS . . GALACTIC RADlO WAVES -A SOURCES . . . . TYPE 2 BURSTS . . . NORTH POLAR SPUR (ASTRONOMY) . . . . TYPE 3 BURSTS . . RADIO BURSTS EXTRASOLAR PLANETS . . . . TYPE 4 BURSTS . . . SOLAR RADlO BURSTS GS CELESTIAL BODIES . . . . TYPE 5 BURSTS . . . . TYPE 2 BURSTS . PLANETS . . SOLAR RADlO EMISSION . . . . TYPE 3 BURSTS . . EXTRASOUR PLANETS . . . SOLAR RADIO BURSTS . . . . TYPE 4 BURSTS RT GAS GIANT PLANETS . . . . TYPE 2 BURSTS . . . . TYPE 5 BURSTS PLANETARY SYSTEMS . . . . TYPE 3 BURSTS . . SOLAR RADlO EMISSION . . . . TYPE 4 BURSTS . . . SOLAR RADlO BURSTS EXTRATERRESTRIAL ENVIRONMENTS . . . . TYPE 5 BURSTS . . . . TYPE 2 BURSTS GS ENVIRONMENTS . GALACTIC RADIATION . . . . TYPE 3 BURSTS EXTRATERRESTRIAL ENVIRONMENTS . . GALACTIC COSMIC RAYS . . . . TYPE 4 BURSTS . . CISLUNAR SPACE . . GALACTIC RADlO WAVES . . . . TYPE 5 BURSTS . . DEEP SPACE . . . NORTH POLAR SPUR (ASTRONOMY) RT CENTIMETER WAVES . . . INTERPLANETARY SPACE GAMMA RAY BURSTS EXTRAGALACTIC RADlO SOURCES . . INTERSTELLAR SPACE . GEGENSCHEIN MICROWAVE EMISSION . . EARTH ORBITAL ENVIRONMENTS INTERSTELLAR RADIATION MICROWAVES . . LUNAR ENVIRONMENT LUNAR RADIATION MILLIMETER WAVES . . . LUNAR ATMOSPHERE . PLANETARY RADIATION RADlO ASTRONOMY . . PLANETARY ENVIRONMENTS PRIMARY COSMIC RAYS RADlO EMlSSlOj4 . . . MARS ENVIRONMENT . . SOLAR COSMIC RAYS RADlO FREQUENCY INTERFERENCE . . . . MARS ATMOSPHERE . SOLAR RADIATION RADlO JETS (ASTRONOMY) . . . PLANETARY ATMOSPHERES . . CIRCUMSOLAR RADIATION RADlO SOURCES (ASTRONOMY) EXTRATERRESTRIAL RESOURCES F 2 REG~N-(~NZ) FIELD OF VIEW-(CONZ) GS RESOURCES . . F 2 REGION RT BEARING (DIRECTION) . EXTRATERRESTRIAL RESOURCES RT SPREAD F CONICAL SCANNING RT LUNAR EXPLORATION TRANSEQUATORIAL PROPAGATION ELEVATION ANGLE PLANETARY BASES r FIELDS SPACE EXPLORATION LOOK ANGLES (TRACKING) SPACE LOGISTICS GS MEASURING INSTRUMENTS VISUAL FIELDS . RADIATION MEASURING INSTRUMENTS EXTRATERRESTRIAL ROVlNQ VEHICLES . . FABRY-PEROT SPECTROMETERS FIELD THEORY (PHYSICS) USE ROVING VEHICLES UF AMBIT FORCE FlEUlS U[TRUIE ULTRIVKKET EXPLORUI SATELUTE WIGHTMAN THEORY UF EUVE AIRGLOW GS FIELD THEORY IPHYSICS) GS ARTIFICIAL SATELLITES AURORAL SPECTROSCOPY . GRAND UNIFIED THEORY . SCIENTIFIC SATELLITES OPTICAL EQUIPMENT . . UNIFIED FIEU) THEORY . . EXPLORER SATELLITES OPTICAL MEASURING INSTRUMENTS . QUANTUM CHROMODYNAMICS . . . EXTREME ULTRAVIOLET EXPLORER . . INSTANTONS SATELLITE FACULAE . STRONG INTERACTICNS (FIELD RT IUh UF PLAGES (FACULAE) THEORY) ULTRAVIOLET ASTRONOMY SOLAR FACULAE . WEAK INTERACTIONS (FIELD THEORY) GS STELLAR ACTIVITY RT ANTENNA RADIATION PATTERNS . SOLAR ACTIVITY ATTRACTION EXTREME ULTRAVIOLET RADIATION . . FACULAE BOSON FIELDS GS ELECTROMAGNETIC RADIATION RT m ACTIVITY CLOSURE LAW . ULTRAVIOLET RADIATION CHROMOSPHERE CROSSED FIELDS . . EXTREME ULTRAVIOLET RADIATION PHOTOSPHERE DlRAC EQUATION IONIZING RADIATION STARSPOTS DISTRIBUTION (PROPERTY) . ULTRAVIOLET RADIATION SUNSPOTS =DYNAMICS . . EXTREME ULTRAVIOLET RADIATION ELECTROMAGNETIC FIELDS RT BEAMS (RADIATION) FAR FIELDS MAGELLAN ULTRAVIOLET ASTRONOMY FAINT OBJECT CAMERA GS OPTICAL EQUIPMENT m FIELDS SATELUTE FLOW DISTRIBUTION mRADIATION . CAMERAS FLUX (RATE) SOLAR RADIATION . . FAINT OBJECT CAMERA PHOTOGRAPHIC EQUIPMENT FLUX DENSITY . CAMERAS FUNCTION SPACE . . FAINT OBJECT CAUUIA GEOMAGNETISM RT ASTRONOMICAL PHOTOGRAPHY GRAVITATIONAL FIELDS HUBBLE SPACE TELESCOPE GREEN'S FUNCTIONS INFRARED PHOTOGRAPHY LIGHT-CONE EXPANSION OPTICAL MEASURING INSTRUMENTS MAGNETIC FIELD INVERSIONS F DISPLAYS SPACEBORNE ASTRONOMY MAGNETIC FIELDS USE F REGION SPACEBORNE TELESCOPES MAGNETOSTATIC FIELDS ULTRAVIOLET PHOTOGRAPHY MANY BODY PROBLEM F UYER MULTIPOLAR FIELDS USE F REGION FAINT OBJECTS NUCLEAR PHYSICS GS CELESTIAL BODIES NULL ZONES F REGION . FAINT OBJECTS . mPHYSICS SN (ALTITUDES ABOVE APPROXIMATELY RT GALAXIES POMERANCHUK THEOREM ' 1w KM) STARS POTENTIAL FIELDS UF F DISPLAYS PRESSURE DISTRIBUTION F LAYER FAR INFRARED RADIATION QUANTUM ELECTRODYNAMICS QUANTUM THEORY NIGHT F LAYER SN (30 MICRONS TO ABOUT 1M)O MICRONS) GS EARTH ATMOSPHERE GS ELECTROMAGNETIC RADIATION RADIATION DISTRIBUTION . UPPER ATMOSPHERE . INFRARED RADIATION RELATIVITY . . EARTH IONOSPHERE . . FAR INFRARED RADIATION SELF CONSISTENT FIELDS . . . UPPER IONOSPHERE RT LONG WAVE RADIATION SOUND FIELDS . . . . F REGION NEAR INFRARED RADIATION STRING THEORY . . . . . F 1 REGION mRADlATION SUPERGRAVITY . . . . . F 2 REGION RADIO WAVES SUPERSYMMETRY REGIONS SHORT WAVE RADlATlON TEMPERATURE DISTRIBUTION . F REGION SUBMILLIMETER WAVES TENSORS . . F 1 REGION TERRESTRIAL RADIATION mTHEORlES . . F 2 REGION TRAVELING CHARGE YANG-MILLS FIELDS RT PLASMA BUBBLES FAR ULTRAVIOLET RADIATION YANG-MILLS THEORY SN (200 TO 2000 ANGSTROMS) ZERO POINT ENERGY F STIRS UF VACUUM ULTRAVIOLET RADIATION GS CELESTIAL BODIES GS ELECTROMAGNETIC RADIATION . STARS . ULTRAVIOLET RADIATION FILAMENTS (SOLAR PHYSICS) . . F STARS . . FAR ULTRAVIOLET RADIATION USE SOLAR PROMINENCES RT DWARF STARS . . . LYMAN ALPHA RADIATION G STARS . . . LYMAN BETA RADIATION FILTER WHEEL INFRARED SPECTROMETERS GIANT STARS IONIZING RADIATION GS MEASURING INSTRUMENTS MAIN SEQUENCE STARS . ULTRAVIOLET RADIATION . OPTICAL MEASURING INSTRUMENTS STELLAR SPECTRA . . FAR ULTRAVIOLET RADIATION . . INFRARED SPECTROMETERS . . . LYMAN ALPHA RADIATION . . . FILTER WHEEL INFRARED F 1 REGION . . . LYMAN BETA RADIATION SPECTROMETERS GS EARTH ATMOSPHERE RT BREMSSTRAHLUNG . SPECTROMETERS . UPPER ATMOSPHERE MAGELLAN ULTRAVIOLET ASTRONOMY . . INFRARED SPECTROMETERS . . EARTH IONOSPHERE SATELLITE . . . FILTER WHEEL INFRARED . . . URPER IONOSPHERE NEAR ULTRAVIOLET RADIATION SPECTROMETERS . . . . F REGION a RADIATION OPTICAL EQUIPMENT . . . . . F 1 REGION ULTRAVIOLET TELESCOPES . OPTICAL MEASURING INSTRUMENTS REGIONS X RAYS . . INFRARED SPECTROMETERS . F REGION . . . FILTER WHEEL INF#&RED . . F 1 REGION FERMI-DIRAC STATISTICS SPECTROMETERS RT BOSONS RT EBERT SPECTROMETERS F 2 REGION DEGENERATE MATTER x FILTERS GS EARTH ATMOSPHERE FERMIONS INFRARED SPECTROPHOTOMETERS UPPER ATMOSPHERE QUANTUM MECHANICS SOLAR SPECTROMETERS . . EARTH IONOSPHERE QUANTUM STATISTICS- .- . . . UPPER IONOSPHERE -a STATISTICS FILTERGRAMS . . . F REGION RT OPTICAL FILTERS . . . . . F 2 REGION FIELD OF VlEW SOLAR INSTRUMENTS REGIONS GS VIEWING SOLAR PHYSICS . F REGION FIELD OF VlEW SOLAR SPECTRA FIREBALLS m FIREBALLS FUGHT-(CONT) FLUX DENSW-(WNT) SN (USE OF A MORE SPECIFIC TERM IS VERTICAL FLIGHT LOUDNESS REWMMENDEPGONSUL T THE TERMS VISUAL FLIGHT MASS DISTRIBUTION LISTED BELOW) METEOROID CONCENTRATION RT BOLIDES ONSAGER PHENOMENOLOGICAL FLUX (RATE PER UNIT AREA) COEFFICIENT NUCLEAR EXPLOSIONS USE FLUX DENSITY ~o POWER POWER SPECTRA FUMES FLUX (RAm PROTONS UF JET FLAMES SN (LIMITED TO THE TOTAL EMANATION OF mRADIATION LAMINAR FLAMES ENERGY, MATERIAL OR PARTICLES RADlATlON DISTRIBUTION GS FUUES FROM A SINGLE SOURCE PER UNIT RADIATION HAZARDS WFFUSK)N FCAMES . TIME-SEE FLUX DENSITY FOR ENERGY, REMANENCE PREMIXED FLAMES . MATERIAL OR PARTICLE RATE PER SCATTERING FUNCTIONS RT COMBUSTION UNIT AREA) SOLAR MAXIMUM MISSION FIRE DAMAGE UF ELECTRON FLUX SOUND PRESSURE FIREBREAKS NEUTRON FLUX SPECTRA FIRES PARTICLE FLUX X RAY DENSITY MEASIJREMENT FLAME HOLDERS GS RATES (PER nMm FLAME PSOPAGATION . FLUX lRAm FLUX MAPPING m FLARES HEA? FLUX FOREST FIRES . . USE FLUX DENSITY . . MAGNETIC FLUX MAPPING FUELS . . SOLAR FLUX SMOG RT BETA PARTICLES BRIGHTNESS FLYBY MISSIONS FLARE STARS CORPUSCULAR RADIATION GS SPACE MISSIONS UF UV CETI STARS DOSIMETERS . FLYBY MISSIONS GS CELESTIAL BODIES ELECTROMAGNETIC RADIATION . . ASTEROID MISSIONS . STARS EMITTANCE . . GIOTTO MISSION . . LATE STARS m ENERGY . . GRAND TOURS . . . COOL STARS FIELD THEORY (PHYSICS) . . . MARINER JUPITER-SATURN FLYBY . . . . FURE STARS FLUX DENSITY . . . MARINER JUPITER-URANUS FLYBY . . MAIN SEQUENCE STARS GAMMA RAYS . . VOYAGER 1977 MISSION . . DWARF STARS m INTENSITY . . MARINER VENUS-MERCURY 1973 .... FLARESTAFIS LEVEL (QUANTITY) . . MARINER-MERCURY 1973 . . VARIABLE STARS LUMINOUS INTENSITY RT GALILEO PROJECT . . . FUR€ STARS MAGNETIC CIRCUITS GALILEO SPACECRAFT RT CATACLYSMIC VARIABLES MAGNETIC INDUCTION INTERPLANETARY FLIGHT M STARS MAGN~OSTATIC~ LONG DURATION SPACE FLIGHT SOLAR FLARES PARTICLE BEAMS LUNAR FLIGHT STELLAR ACTIVITY PARTICLE DIFFUSION MARINER MARK 2 SPACECRAFT STELLAR FLARES mPOWER MARINER PROGRAM SYMBIOTIC STARS RADIANT FLUX DENSITY r MISSIONS mRADIATION OUTER PLANETS EXPLORERS SPACE FLIGHT r FLASH STEFAN-BOLTZMANN LAW SN (USE OF A MORE SPECIFIC TERM IS SWINGBY TECHNIQUE RECOMMENDED-CONSULT THE TERMS TOPS (SPACECRAFT) FLUX DENSITV VEGA PROJECT USED BELOW) SN (LIMITED TO ENERGY. MATERIAL 0d UF LIGHT DURATION VOYAGER 1 SPACECRAFT PARTICLE RATE PER UNIT AREA. THE VOYAGER 2 SPACECRAFT RT ELECTRIC DISCHARGES QUANTI~USUALLY MEASUREGEE EXPLOSIONS FLUX (RATE) FOR TOTAL EMANATION FLASH WELDING FROM A SINGLE SOURCE PER UNlT FLYING FLASHING (VAPORIZING) TIME) USE FLIGHT UGHT (VISIBLE RADIATION) UF DENSITY (RATEIAREA) RADIOGRAPHY ENERGY DENSITY FORBWH DECREASES SOLAR FLARES FLUX (RATE PER UNlT AREA) UF FORBUSH EFFECT FLUX MAPPING RP COSMIC RAYS = FUGHT GS RATES (PER nRng =EFFECTS SN (USE OF A MORE SPECIFIC TERM IS . FLUX DENSITY MAGNETIC STORMS RECOMMENDED-CONSULT THE TERMS . . CURRENT DENSITY SOLAR FLARES LISTED BELOW . . PHOTON DENSITY SOLAR FURNACES UF FLYING . . RADIANT FLUX DENSITY SOLAR STORMS HlGH ALTITUDE FLIGHT . . . IRRADIANCE HlGH SPEED FLIGHT . . . . ILLUMINANCE FORBUSH EFFECT RT AERODYNAMICS . . . . SOLAR CONSTANT USE FORBUSH DECREASES r AERONAUTICS . . . LUMENS BALLOON FLIGHT . . . LUMINOUS INTENSITY CLIMBING FLIGHT . . . . ILLUMINANCE FORCE FIELDS COASTING FLIGHT . . . . LUMINANCE USE FIELD THEORY (PHYSICS) CRUISING FLIGHT . . . PARTICLE FLUX DENSITY FLIGHT ALTITUDE . . . . ELECTRON FLUX DENSITY FOREIGN BODIES FLIGHT CONTROL . . . . NEUTRON FLUX DENSITY RT AIRCRAFT HAZARDS FLIGHT MECHANICS . . . . PROTON FLUX DENSITY zBODIES FLIGHT OPTIMIZATION . . . RADIANCE INJURIES FLIGHT PATHS . . . RADIANCY METEORITES FLIGHT SAFETY . . . SOLAR FLUX DENSITY FLIGHT TESTS . . . . SOLAR CONSTANT FLIGHT TIME . . SOUND INTENSITY FORMYL IONS FREE FUGHT . . . ZERO SOUND GS IONS GLIDING RT ALPHA PARTICLES MOLECULAR IONS HORIZONTAL FLIGHT ANGULAR DISTRIBUTION . . FORMYL IONS HYPERSONIC FLIGHT ATOM CONCENTRATION . POSITIVE IONS CATIONS LONG DURATION SPACE FLIGHT m DENSITY LUNAR FLIGHT DOSIMETERS FORMYL IONS METEOROLOGICAL FLIGHT ELECTROMAGNETIC RADIATION RADICALS . FORMYL IONS PARABOLIC FLIGHT m ENERGY ROCKET FLIGHT ENERGY DISTRIBUTION RT ATMOSPHERIC CHEMISTRY SOARING FIELD INTENSITY METERS FORMATES SPACE FLIGHT FIELD STRENGTH FORMIC ACID STEERING FIELD THEORY (PHYSICS) HYDROXYL RADICALS SUBORBITAL FLIGHT FLUX (RATE) INTERSTELLAR CHEMISTRY SUPERSONIC FLIGHT GAMMA RAYS INTERSTELLAR MATTER TRAJECTORIES HEAT FLUX TRANSOCEANIC FLIGHT m INTENSITY FOSSIL METEORITE CRATERS TRANSONIC FLIGHT IRRADIATION USE FOSSILS TURNING FLIGHT LEVEL (QUANTITY) METEORITE CRATERS GALILEO PROBE

FOUR BODY PROBLEM GALACTIC CLU~RS-(CONZ) GALACTIC RADIATION RT CELESTIAL MECHANICS MISSING MASS iASTROPHYSICSI . - MANY BODY PROBLEM STAR CLUSTERS . . GALACTIC RADlO WAVES ORBITS STAR DISTRIBUTION . . . NORTH WLAR SPUR (ASTRONOMY) PERTURBATION STELLAR SYSTEMS RT COSMIC NOISE RADlO JETS (ASTRONOMY) J PROBLEMS THREE BODY PROBLEM GALACTIC COSMIC RAYS GS EXTRATERRESTRIAL RADIATION GALACTIC ROTATION FRAUNHOFER UNES . GALACTIC RADIATION RT COROTATlON GS SPECTRA . . GALACTIC COSMIC RAYS DlSK GALAXIES . RADIATION SPECTRA IONlZlNG RADIATION HYDROGEN CLOUDS . . ABSORPTION SPECTRA . COSMIC RAYS IRREGULAA GALAXIES . . . FRAUNHOFER UNES . . GALACTtC COSMIC RAYS STELLAR MOTIONS . . ELECTROMAGNETIC SPECTRA RT ENERGETIC PARTICLES STELLAR SYSTEMS . . . LINE SPECTRA SOLAR ACTWITY EMS VELOCITY DISTRIBUTION . . . . FRAUNHOFER UNES SOLAR WIND . SPECTRAL BANDS GALACTIC STRUCTURE . . ABSORPTION SPECTRA GALACTIC EVOLUTION RT BARRED GALAXIES . . FRAUNHOFER UNES GS EVOLUTION (DEVELOPMENT) COROTATlON RT ABSORPTION SPECTROSCOPY . GALACTIC EVOLUTION DENSITY WAVE MODEL OPTOGALVANIC SPECTROSCOPY RT ASTROPHYSICS DlSK GALAXIES SOLAR SPECTRA BIG BANG COSMOLOGY GALACTIC MASS COOLING FLOWS (ASTROPHYSICS) GALAXIES COSMOLOGY IRREGULAR GALAXIES FREE ATMOSPHERE DARK MAlTER MISSING MASS (ASTROPHYSICS) GS EARTH ATMOSPHERE DlSK GALAXIES . FREE ATMOSPHERE STELLAR SYSTEMS GALACTIC MASS m STRUCTURES RT BIOSPHERE STAR DISTRIBUTION MIDDLE ATMOSPHERE STAR KIRMATION RATE PRIMITIVE EARTH ATMOSPHERE GALAXIES STEUAR EVOLUTION GS CELESTIAL BODIES STELLAR MASS ACCRETION . GALAXIES FRENCH SPACE PROGRAMS . . ACTIVE GALAXIES GS- - PROGRAMS GALACTIC MAGNETIC FIELDS . MARKARIAN GALAXIES . SPACE PROGRAMS . . USE INTERSTELLAR MAGNETIC FIELDS . RADIO GALAXIES FRENCH SPACE PAOQRAMS ...... SEYFERT GALAXIES RT EOLE SATELLITES DlSK GALAXIES EUROPEAN SPACE PROGRAMS . . FRANCE GS MASS . . C'NARF GALAXIES GEOLE~ATELLITES . GALACTN: MASS . . ELLIPTICAL GALAXIES GALACTIC CLUSTERS HERMES MANNED SPACEPLANE RT GALACTIC EVOLUTION . . INTERNATIONAL COOPERATION GALACTIC STRUCTURE . . . LOCAL GROUP (ASTRONOMY) METEOSAT SATELLITE MASS DISTRIBUTION . . . . ANDROMEDA GALAXY STELLAR MASS . . VIRGO GALACTIC CLUSTER r RESEARCH PROJECTS . IRREGULAR GALAXIES SPACE EXPLORATION . . MAFFEI GALAXIES SPACE MISSIONS GALACTIC NUCLEI . . . . MAGELLANG CLOUDS r SPACECRAFT GS GALACTIC NUCLEI SRET SATELLITES . ACTIVE GALACTIC NUCLEI . . SPIRAL GALAXIES BARRED GALAXIES SRET 1 SATELUTE RT ABSORPTION SPECTRA . . . ACCRETION DISKS . . . MILKY WAY GALAXY ACTIVE GALAXIES . . STARBURST GALAXIES FREQUENCY SHIFT DlSK GALAXIES RT BL LACERTAE OBJECTS RT BRlLLOUlN EFFECT RADIO JETS (ASTRONOMY) FAINT OBJECTS DOPPLER EFFECT RADIO SOURCES (ASTRONOMY) GALACTIC STRUCTURE DOPPLER-FIZEAU EFFECT SEYFERT GALAXIES GUM NEBULA GYROTROPISM STARBURST GALAXIES HUBBLE CONSTANT =SHIFT HUBBLE DIAGRAM GALACTIC RADIATION METALLICIN FROST GS EXTRATERRESTRIAL RADIATION NEBULAE RT BAY ICE . GALACTIC RADIATION ORION NEBULA DEW . . GALACTIC COSMIC RAYS QUASARSRADIO SOURCES (ASTRONOMY) FREEZING . . GALACTIC RADlO WAVES ICE . . . NORTH POLAR SPUR (ASTRONOMY) RED SHIFT LOW TEMPERATURE RT ACTIVE GAucnc NUCLEI STAR CLUSTERS ACTIVE GALAXIES STAR FORMATION RATE FROZEN SOILS BRIGHTNESS DISTRIBUTION STARS USE PERMAFROST CORPUSCULAR RADIATION STELLAR SYSTEMS Cos~lCNGSE COSMIC RAYS GALILEAN SATELLITES COSMIC X RAYS GS CELESTIAL BODIES ELECTROMAGNETIC RADIATION . NATURAL SATELLITES GAMMA RAY ASTRONOMY . . JUPITER SATELLITES GAMMA RAY BURSTS . . . GALILEAN SATELLITES G STARS HUBBLE DIAGRAM . . . . CALLISTO GS CELESTIAL BODIES INTERSTELLAR RADIATION . . . . EUROPA . STARS IRREGULAR GALAXIES . . . . GANYMEDE . . G STARS MASS TO LIGHT RATIOS .... 10 . . . SUN NONTHERMAL RADIATION RT CHARON RT DWARF STARS m RADIATION GALILEO PROJECT F STARS RADIATIVE TRANSFER GALILEO SPACECRAFT GIANT STARS SOLAR RADIATION 1 SATELLITE ICY SATELLITES MAIN SEQUENCE STARS SOLAR RADIATION 3 SATELLITE JUPITER (PLANET) STELLAR SPECTRA STELLAR RADIATION TRITON UHURU SATELLITE GALACTIC CLUSTERS GALILEO MISSION GS CELESTIAL BODIES GALACTIC RADIATION EXP BACKGROUND SATS USE GALILEO PROJECT . GALAXIES USE GREB SATELLITES . . GALACTIC CLUSTERS GALILEO PROBE . . . LOCAL GROUP (ASTRONOMY) GALACTIC RADlO WAVES GS INTERPLANETARY SPACECRAFT , ANDROMEDA GALAXY GS ELECTROMAGNETIC RADIATION . JUPITER PROBES . VIRGO GALACTIC CLUSTER RADlO WAVES . . GALILEO PROBE RT AGGLOMERATION . . EXTRATERRESTRIAL RADlO WAVES UNMANNED SPACECRAFT CLUSTERS . . . GALACTIC RADlO WAVES SPACE PROBES COOLING FLOWS (ASTROPHYSICS) EXTRATERRESTRIAL RADIATION JUPITER PROBES DlSK GALAXIES . EXTRATERRESTRIAL RADlO WAVES . . GALILEO PROBC ELLIPTICAL GALAXIES . . GALACTIC RADIO WAVES RT JUPITER (PLANET) METALLICIN . . . NORTH POLAR SPUR (ASTRONOMY) r PROBES GALILEO PROJECT

GAMMA RAY SPECTRA GEQENSCHEIN GS SPECTRA GS ELECTROMAGNETIC RADIATION . RADIATION SPECTRA , LIGHT (VISIBLE RADIATION) GAULEO PROJECT . . ELECTROMAGNETIC SPECTRA . . QEGENSCHEIN UF GALILEO MISSION . . . GAMMA RAY SPECTRA EXTRATERRESTRIAL RADIATION GS PROGRAMS RT EMISSION SPECTRA . GEGENSCHEIN . NASA PROGRAMS IONIZING RADIATION RT NIGHT SKY . . NASA SPACE PROGRAMS POLARIZED LIGHT SKY BRIGHTNESS . . . GAULEO PROdECT 6AMMA RAY SPECTROMETERS . PROJECTS SOLAR RADIATION OS MEASURING INSTRUMENTS TERRESTRIAL DUST BELT . . GAULEO PROJECT . SPECTROMETERS SPACE PROGRAMS ZODIACAL LIGHT . . . (BAUUA RAY SPtE- . . NASA SPACE PROGRAMS RT OPTICAL MEASUREMENT . . . GAULEO PROJECT SOLAR MAXIMUM MISSION GEIGER COUXTERS RT AMPHITRITE ASTEROID SPECTRA UF GEIGER-MUELLER TUBES GS IONlZATlON CHAMBERS ATMOSPHERIC ENTRY SPECTRUM ANALYSIS FLYBY MISSIONS . GEIGER COUNTERS GAULEAN SATELLITES MEASURING INSTRUMENTS JUPITER ATMOSPHERE GAMMA RAY TELESCOPES COUNTERS GS TELESCOPES RADIATION COUNTERS . GAMMA RAY TELESCOPES . . GEIGER COUNTERS GALILEO SPACECRAFT RT COSMIC RAYS RADIATION MEASURING INSTRUMENTS GS INTERPLANETARY SPACECRAFT GAMMA RAY ASTRONOMY RADIATION COUNTERS . JUPITER PROBES GAMMA RAY OBSERVATORY . . GEIGER COUNTERS GALILEO SPACECRAFT RT DOSIMETERS NEUTRON COUNTERS UNMANNED SPACECRAFT GAMMA RAYS . SPACE PROBES OVERVOLTAGE SN (EMITTED BY NUCLEI) PARTICLE TELESCOPES . . JUPITER PROBES UF GAMMA RADIATION . . . GAULEO SPACECRAFT PROPORTIONAL COUNTERS GS ELECTROMAGNETIC RADIATION RADIATION DETECTORS RT FLYBY MISSIONS GAMMA RAYS GAULEAN SATELLITES . . GAMMA RAY BURSTS JUPITER (PLANET) oranffi RADIATION GEffiER4UEUER TUBES mMlSSIONS . GAMMA RAYS USE GEIGER COUNTERS mSPACECRAFF . . GAMMA RAY BURSTS NUCLEAR RADIATION GEMINID METEOROIDS GAMMA RADIATION . WMA RAYS GS CELESTIAL BODIES USE GAMMA RAYS . . GAMMA RAY BURSTS . METEOROID SHOWERS RT BREMSSTRAHLUNG . . GEMINID METEOROIDS GAMMA RAY ASTRONOMY CERENKOV RADIATION . METEOROIDS GS ASTRONOMY COSMIC RAYS . . GEMINID METEOROIDS . GAMMA RAY ASTRONOMY COSMIC X RAYS RT ASTROPHYSICS DECAY GEO ENVIRONMENTS COSMIC X RAYS EMISSION SPECTRA USE EARTH ORBITAL ENVIRONMENTS ENERGY SPECTRA FLUX (RATE) GALACTIC RADIATION FLUX DENSITY OEOASTROPHYSICS GAMMA RAY BURSTS MONOCHROMATIC RADIATION USE ASTROPHYSICS GAMMA RAY TELESCOPES MOSSBAUER EFFECT GEOPHYSICS RADIO ASTRONOMY PHOTOMAGNETIC EFFECTS X RAY ASTRONOMY PHOTONS GEOCORONAL EMISSIONS m RADIATION GS ATMOSPHERIC RADIATION GAMMA RAY ASTRONOMY EXPLORER RADIATION EFFECTS . SKY RADIATION USE EXPLORER 11 SATELLITE RADIATION SHIELDING . . AIRGLOW RADIOACTIVE DECAY ... GEOCORONAL EMISSIONS GAMMA RAY BUR= RADIOACTIVITY ELECTROMAGNETIC RADIATION UF COSMIC GAMMA RAY BURSTS mRAYS . LIGHT (VISIBLE RADIATION) GS BURSTS TRANSVERSE OSCILLATION . . SKY RADIATION . GAMMA RAY BURSTS TRANSVERSE WAVES . . . AIRGLOW ELECTROMAGNETIC RADIATION X RAYS . . . . GEOCORONAL EMISSIONS . GAMMA RAYS GAMMA RAY BURSTS . . GANYMEDE GEODESY EXTRATERRESTRIAL RADIATION GS CELESTIAL BODIES UF EARTH FIGURE . GAMMA RAY BURSTS NATURAL SATELLITES EARTH SHAPE IONIZING RADIATION . . ICY SATELUTES IZSAK ELLIPSOID ' COSMIC RAYS . . GANYMEDE GS GEODESY GAMMA RAY BURSTS ... . . JUPITER SATELLITES . CELESTIAL GEODESY GAMMA RAYS . . . . . GALILEAN SATELLITES RT ALTIMETRY . GAMMA RAY BURSTS ...... GANYMEDE EARTH (PLANET) NUCLEAR RADIATION RT CALLISTO EARTH AXIS GAMMA RAYS CHARON GEODETIC ACCURACY GAMMA RAY BURSTS . . 10 GEODETIC SURVEYS RT BIG BANG COSMOLOGY JUPITER (PLANET) GEOIDS BREMSSTRAHLUNG GEOLOGY CERENKOV RADIATION GEOPHYSICS COSMIC X RAYS GAS GIANT PLANETS GRAVIMETERS GALACTIC RADIATION GS CELESTIAL BODIES LUNAR RETROREFLECTORS GAMMA RAY ASTRONOMY . PLANETS OBLATE SPHEROIDS INTERSTELLAR RADIATION . . GAS GIANT PLANETS 000-4 NUCLEAR PARTICLES . . . JUPITER (PLANET) OGO-5 RADIANT FLUX DENSITY . . . NEPTUNE (PLANET) PERTURBATION STELLAR RADIATION . . . SATURN (PLANETI PHOTOMAPPING X RAY ASTRONOMY . . . URANUS (PLANET) POLAR WANDERING (GEOLOGY) RT EXTRASOLAR PLANETS SATELLITE ALTIMETRY GAMMA RAY OBSERVATORY JUPITER RED SPOT SATELLITE DOPPLER POSITIONING GS ARTIFICIAL SATELLITES NEPTUNE ATMOSPHERE TOPOGRAPHY . SCIENTIFIC SATELLITES PLANETARY COMPOSITION VlNTl THEORY . . ASTRONOMICAL SATELLITES SATURN RINGS . . . GAMMA RAY OBSERVATORY SOLAR SYSTEM GEODYNAMICS OBSERVATORIES URANUS ATMOSPHERE UF CRUSTAL DYNAMICS . ASTRONOMICAL OBSERVATORIES RT CRUSTAL FRACTURES . . ASTRONOMICAL SATELLITES GAUGE INVARIANCE T DYNAMICS . . . GAMMA RAY OBSERVATORY GS INVARIANCE EARTH MOVEMENTS RT GAMMA RAY TELESCOPES . GAUGE INVARIANCE GEOMORPHOLOGY OGO RT ELECTROMAGNETIC RADIATION GEOPHYSICS -- SPACEBORNE ASTRONOMY SUPERGRAVITY PLANETARY QUAKES SPACEBORNE TELESCOPES TRANSFORMATIONS (MATHEMATICS) SHOCK WAVES GRAVITATIONAL EFFECTS

GEOSYNCHRONOUS OR~(CONZ) GRAND UNIFIED THEORY-(CON~~ STATIONARY ORBITS ELECTROMAGNETIC FIELDS SYNCHRONOUS PLATFORMS ELECTROMAGNETIC INTERACTIONS TWENTY-FOUR HOUR ORBITS ELECTROMAGNETISM GEOMAGNETIC CROTCHETS GRAVITATION THEORY USE SUDDEN IONOSPHERIC DISTURBANCES GEP TELESCOPES GRAVITATIONAL FIELDS USE PARTICLE TELESCOPES PARTICLE THEORY GEOMAGNETIC FIELD PLASMA PHYSICS USE GEOMAGNETISM RELATIVITY GERMAN-- INFRARED LABORATORY STRING THEORY GS TELESCOPES STRONG INTERACTIONS (FIELD GEOMAGNETK: HOLLOW SPACEBORNE TELESCOPES . THEORY) GS ANOMALIES . . GERMAN INFRARED LABORATORY . MAGNETIC ANOMALIES SUPERSYMMETRY RT PAYLOADS SYMMETRY . . aEoMAanmC Houow SPACE SHUlTLES RT EARTH MAGNETOSPHERE THEORETICAL PHYSICS SPACELAB WEAK ENERGY INTERACTIONS MAGNETOHYDRODYNAMK: FLOW WEST GERMANY PLASMA CLOUDS WEAK INTERACTIONS (FIELD THEORY) GIACOBINI-ZINNER COMET GEOMAGNETIC STORMS GS CELESTIAL BODIES GRAVITATION USE MAGNETIC STORMS . COMETS UF GRAVITY . . GIACOBINI-ZINNER COMET GS GRAVITATION ARTIFICIAL GRAVITY GEOMAGNETIC TAlL RT DRACONID METEOROIDS . EARTH GRAVITATION GS ENVIRONMENTS GRAVITY ANOMALIES . EARTH MAGNETOSPHERE GIANT STARS LUNAR GRAVITATION . GEOMAGNETIC TAlL GS CELESTIAL BODIES . . PLANETARY GRAVITATION RT' GEOMAGNETISM STARS . . REDUCED GRAVITY FIELDS (HANT STIRS . MAGNETIC . . STELLAR GRAVITATION PLANETARY MAGNETIC FIELDS ASYMPTOTIC GlANT BRANCH . . . . SOLAR GRAVITATION POLAR CUSPS STARS . . OMICRON CETI STAR RT ANTIGRAVITY . . . DRAG GEOMAGNmCAUY TRAPPED PARTKXES . . . RED GIANT STARS CARBON STARS ENVIRONMENTS USE RADIATION BELTS . . . . GEOWTENTIAL RESEARCH MISSION RT COOL STARS GRAVIMETERS F STARS GEOMAGNETISM GRAVITATIONAL CONSTANT G STARS UF GEOMAGNETIC FlELD GRAVITATIONAL EFFECTS K STARS TERRESTRIAL MAGNETISM GRAVITATIONAL FIELDS LATE STARS GS MAGNETIC FIELDS GRAVITATIONAL WAVES M STARS . GEOMAGNETISM GRAVITY GRADIOMETERS MAIN SEQUENCE STARS MAGNETIC PROPERTIES HIGH GRAVITY ENVIRONMENTS S STARS . GEOMAGNETISM ISOSTASY RT AEROMAGNETISM SUBGIANT STARS SUPERGIANT STARS LOW WEIGHT BARIUM ION CLOUDS LUNAR GRAVITY SIMULATOR CONTINENTAL DRIFT PENDULUMS DYNAMO THEORY GMOMISSION ROCHE LIMIT EARTH (PLANET) GS ESA SPACECRAFT SIMILITUDE LAW EARTH GRAVITATION . GlOTTO MISSION SPACECRAFT ENV!RONMENTS EARTH MAGNETOSPHERE . SPACE MISSIONS TERMINAL VELOCITY ELECTROJETS . FLYBY MISSIONS WEIGHT (MASS) FlELD THEORY (PHYSICS) . . GIOTTO MISSION WEIGHTLESSNESS GEOMAGNETIC LATITUDE UNMANNED SPACECRAFT GEOMAGNETIC PULSATIONS . SPACE PROBES GEOMAGNETIC TAlL . . GlOTTO MISSK)II GRAVlTATlON THEORY GEOPHYSICS RT HALLM'S COMET GS GRAVITATION THEORY SUPERGRAVITY lo INCLINATION . RT BlMETRlC THEORIES INTERNATIONAL MAGNETOSPHERIC GLOBULAR CLUSTERS SNDY GAUGE THEORY GS CELESTIAL BODIES GRAND UNIFIED THEORY KP INDEX . STAR CLUSTERS M REG~ON GRAVITATIONAL FIELDS . . GLOBULAR CLUSTERS GRAVITATIONAL WAVE ANTENNAS MAGNETIC ANOMAUES . . . HORIZONTAL BRANCH STARS MAGNETIC DISTURBANCES GRAVlTlNOS RT mCLUSTERS GRAVITONS MAGNETIC EFFECTS COLOR-MAGNITUDE DIAGRAM MAGNETIC EQUATOR STRING THEORY METALLlClTY SUPERSYMMETRY MAGNETIC POLES STAR DISTRIBUTION MAGNETIC SURVEYS mTHEORlES MAGNETOIONICS UNIFIED FlELD THEORY MAGNETOMETERS GLOW MAGNETOSHEATH USE LUMINESCENCE GRAVITATIONAL COLLAPSE MAGSAT A SATELLITE GS GRAVITATIONAL COLLAPSE MAGSAT B SATELLITE GOWARD EXPERIMENT PACKAGE TELESCOPE . WHITE HOLES (ASTRONOMY) MAGSAT SATELLITES USE PARTICLE TELESCOPES RT ASTROPHYSICS MAGSAT 1 SATELLITE BLACK HOLES (ASTRONOMY) PALEOMAGNETISM GRAND TOURS NAKED SlNGULARlTlES PLANETARY MAGNETIC FIELDS UF OUTER PLANET MISSIONS NEUTRAL CURRENTS POLAR CUSPS GS SPACE MISSIONS QUASARS SPACE PLASMAS . FLYBY MISSIONS RELATIVISTIC PLASMAS VARIOMETERS . . GRAND TOURS STELLAR CORES . . . MARINER JUPITER-SATURN FLYBY STELLAR INTERIORS GEOMETRICAL HYDROMAGNEllCS . . . MARINER JUPITER-URANUS FLYBY STELLAR SYSTEMS USE MAGNETOHYDRODYNAMICS . . . VOYAGER 1977 MISSION SUPERNOVAE RT mMlSSlONS OUTER PLANETS EXPLORERS GRAVITATIONAL CONSTANT USE RELATIVITY SPACE FLIGHT GS CONSTANTS VOYAGER 1 SPACECRAFT GRAVITATIONAL CONSTANT GEOSYNCHRONOUS EARTH ORBITAL VOYAGER 2 SPACECRAFT RT BIG BANG COSMOLOGY ENVIRONMENTS USE EARTH ORBITAL ENVIRONMENTS GRAND UNIFIED THEORY GRAVITATIONAL EFFECTS UF GUT GS GRAVITATIONAL EFFECTS GEOSYNCHRONOUS ORBITS GS FlELD THEORY (PHYSICS) GRAVITATIONAL LENSES GS ORBITS . GRAND UNIFIED THEORY LAGRANGIAN EQUILIBRIUM POINTS SPACECRAFT ORBITS . . UNIFIED FlELD THEORY LUNAR GRAVITATIONAL EFFECTS . . SATELLITE ORBITS RT ASTROPHYSICS ~f ACCELERATION STRESSES . . . GEOSYNCHRONOUS ORBITS BIG BANG COSMOLOGY (PHYSIOLOGY) AT CIRCULAR ORBITS BROKEN SYMMETRY ACCELERATION TOLERANCE EQUATORIAL ORBITS COSMOLOGY DROP TOWERS INFRARED ASTRONOMY SATELLITE EINSTEIN EQUATIONS r EFFECTS GRAVITATIONAL LENSES

GRAVITATIONAL EFF€cTs-(~N~) QRlaaSKJULERUP COMET H GAMMA LlNE GEOTROPISM GS CELESTIAL BOMES GS-- SPECTRA- -- GRAVITATIONAL PHYSIOLOGY . COMETS . RADIATION SPECTRA GRAVITROPISM . . GRK;OSI(JELLERUP COMET . . ELECTROMAGNETIC SPECTRA GRAVITY PROBE B RT -COMA . . . LlNE SPECTRA LANGLEY COMPLEX WORDINATOR COMET TAILS . . . . H LINES LOWER BODY NEGATIVE PRESSURE SOLAR SYSTEM . . . . . H GAMMA UNE ORBITAL RESONANCES (CELESTIAL SOLAR WHD RT ABSORPTION SPECTRA MECHANICS) BALMER SERIES REISSNER-NORDSTROM SOLUTION EMISSION SPECTRA QRwo (TUESCOPE) SOLAR SPECTRA STELLAR MASS ACCRmON UF GRAZING INCIDENCE SOLAR STELLAR SYSTEMS TELESCOPE SWINGBY TECHNIQUE H IREGIONS GS TELESCOPES GS CELESTIAL BODIES WEIGHTLESSNESS OWING INCIDENCE TELESCOPES . . NEBULAE . . GRIST CnrLEscOPm GRAVITATIONAL LENSES . . H l REGIONS RT ENERGY SPECTRA HYDROGEN CLOUDS GS GRAVITATIONAL EFFECTS SOLAR COSMIC RAYS . H l REGIONS . GRAVITATIONAL LENSES SPACEUB RT sCLOUDS LENSES SUN . GRAVITATIONAL LENSES HYDROGEN ATOMS RT BLACK HOLES (ASTRONOMY) INTERSTELLAR GAS FOCUSING GROUND TRACKS INTERSTELLAR MATTER GRAVITATIONAL FIELDS GS GROUND TRACKS NEUTRAL ATOMS LIGHT SCAlTERING . SATELLITE GROUND TRACKS NEUTRAL GASES NEUTRON STARS RT AREA NAVIGATION RADIO SPECTRA RELAnvlsnc EWECTS FLIGHT PATHS RELATlVlTY GREAT CIRCLES H II REGIONS STELLAR GRAVITATION ORBITS GS CELESTIAL BODIES WHITE HOLES (ASTRONOMY) mPATHS . NEBULAE mTRACKS . . H ll REGIONS GRAVITATIONAL RADIATION HYDROGEN CLOUDS H ll REGIONS USE GRAVITATIONAL WAVES GROUND WlND . RT mCLOUDS GS WlND (METEOROLOGY) EMISSION SPECTRA GRAVITAfWMAL WAVES GROUND WlND . H ALPHA LlNE UF GRAVITATIONAL RADIATION RT AIR CURRENTS HYDROGEN IONS RT CELESTIAL BODIES ATMOSPHERIC CIRCULATION INTERSTELLAR GAS CELESTIAL MECHANICS CYCLONES INTERSTELLAR MATTER EARTH-MOON SYSTEM GUST LOADS IONIZED GASES GRAVITY WAVES GUSTS s RADIATION MONSOONS r WAVES SQUALLS H LINES STORMS (METEOROLOGY) SN (EXCLUDES SURFACES OF CONSTANT GRAVITINOS TORNADOES MAGNETIC FIEUI STRENGTH) GS PARTICLES WlND DIRECTION GS SPECTRA ELEMENTARY PARTICLES WlND EFFECTS . RADIATION SPECTRA . . GRAVmNOS WlND EROSION . . ELECTROMAGNETIC SPECTRA . NEUTRAL PARTICLES WlND PRESSURE . . . LlNE SPECTRA . . GRAVmNOS WlND PROFILES . . . . H LINES RT BARYONS WlND SHEAR . . . . . H ALPHA UNE COSMOLOGY WlND VELOCITY . . . . . H BETA LlNE DECOUPUNG WINDMILLS (WINDPOWERED MACHINES) . . . . . H GAMMA LINE GRAVITATION THEORY WINDPOWER UTILIZATION RT ABSORPTION SPECTRA GRAVITONS WINDPOWERED GENERATORS BALMER SERIES NEUTRINOS 0 LINES PARTICLE MASS EMISSION SPECTRA SUPERGRAVITY GUM NEBUU K LINES GS CELESTIAL BODIES WEAK ENERGY INTERACTIONS LYMAN SPECTRA . NEBULAE PASCHEN SERIES . . OUIIR NEBUU RYDBERG SERIES GRAVITY RT GALAXIES USE GRAVITATION SOLAR SPECTRA IRREGULAR GAWIES TELLURIC LINES ORION NEBULA GRAVITY ASSIST TRAJECTORIES H WAVES USE SWINGBY TECHNIQUE GUT GS ELECTROMAGNETIC RADIATION USE GRAND UNIFIED THEORY . H WAVES GRAZING INCIDENCE SOUR TELESCOPE OSCILLATIONS USE GRIST (TELESCOPE) . TRANSVERSE OSCILLATION . . H WAVES GRAZING INCIDENCE TELESCOPES TRANSVERSE WAVES GS TELESCOPES H WAVES . GRAZING INCIDENCE TELESCOPES AT ELECTRIC FIELD STRENGTH . . GRIST (TELESCOPE) RT GRAZING INCIDENCE H ALPHA UNE HALLEY'S CUMET X RAY ASTRONOMY GS SPECTRA GS CELESTIAL BODIES X RAY TELESCOPES . RADIATION SPECTRA . COMETS . . ELECTROMAGN€llC SPECTRA . . HALLEY'S COMET GREB SATELUTES . . . LINE SPECTRA RT GlOTTO MISSION SN (GALACTIC RADIATION EXPERIMENTAL . . . . H LINES SOLAR SYSTEM BACKGROUND SATELLITES) . . . . . H ALPHA UNE VEGA PROJECT UF GALACTIC RADIATION EXP AT ABSORPTION SPECTRA BACKGROUND SATS EMISSION SPECTRA HALO ORBIT SPACE STATION GS ARTIFICIAL SATELLITES H II REGIONS GS ARTIFICIAL SATELLITES GREB SATELLITES SOLAR SPECTRA SPACE STATIONS HALO ORBIT SPACE STATION GREENHOUSE EFFECT H BETA LlNE STATIONS AT ATMOSPHERIC HEAT BUDGET GS SPECTRA SPACE STATIONS ATMOSPHERIC RADIATION . RADIATION SPECTRA HALO ORBIT SPACE STATION CLIMATE CHANGE . . ELECTROMAGNETIC SPECTRA RT LUNAR SPACECRAFT EARTH ATMOSPHERE . . . LlNE SPECTRA -I. EFFECTS . . . . H LINES HALOE ENVIRONMENT EFFECTS H BETA LlNE USE HALOGEN OCCULTATION EXPERlhr INSOLATION RT ABSORPTION SPECTRA TERRESTRIAL RADIATION BALMER SERIES ' HALOGEN OCCULTATION EXPERIMENT THERMAL RADIATION EMISSION SPECTRA UF HALOE VENUS CLOUDS SOLAR SPECTRA GS PAYLOADS HELIUM STARS

HALOQEN OCCULTATION EXPERIMENT-(CON ) Ha01-(WNT) HEUOS A-(WNT) . SPACE SHUTTLE PAYLOADS . ASTRONOMICAL OBSERVATORIES . HELIOS SATELLITES . . HALOGEN OCCULTATlON . . ASTRONOMICAL SATELLITES . . HELIOS A EXPERIMENT . . . HEAO UNMANNED SPACECRAFT RT OZONE .... HEAO1 . SPACE PROBES UNMANNED SPACECRAFT . . SOLAR PROBES HALOS . HEAO 1 . . . HEUOS A GS SCATTERING RT OAO . WAVE SCATTERING HEUOS B . . ELECTROMAGNETIC SCATTERING HUO2 GS ARTIFICIAL SATELLITES . . . UGH1 SCATTERING UF EINSTEIN OBSERVATORY . HELIOS SATELLITES . . . . HALOS HEAO B . . HWOS B TRANSMISSION HlGH ENERGY ASTRONOMY UNMANNED SPACECRAFT . ELECTROMAGNETIC WAVE OBSERVATORY B . SPACE PROBES TRANSMISSON HlGH ENERGY ASTRONOMY . . SOLAR PROBES . . LIGHT TRANSMISSION OBSERVATORY 2 . . . HEUOS B . . . UGHT SCATTERING GS OBSERVATORIES HALOS ASTRONOMICAL OBSERVATORIES . . . . . HELIOS PROJECT WAVE PROPAGATION ASTRONOMICAL SATELLITES . . . GS PROGRAMS LIGHT SCATTERING . HEAO . . . . . NASA PROGRAMS . . . HALOS HEAO2 .... NASA SPACE PROGRAMS RT ASTRONOMY UNMANNED SPACECRAFT . . HELlOS PROJECT ATMOSPHERIC SCATTERING . HEAO 2 . . . . PROJECTS CORONAS AT OAO . . HELIOS PROJECT HAZE . SPACE PROGRAMS IMAGES NASA SPACE PROGRAMS RAINBOWS . . UF HEAO C . . . HEUOS PROJECT HlGH ENERGY ASIl3ONOMY RT CHARGED PARTICLES OBSERVATORY C HlGH TEMPERATURE PLASMAS HlGH ENERGY ASTRONOMY SOLAR PROBES OBSERVATORY 3 ZODIACAL LIGHT GS HAMlLTON-JACOBl EQUATION O~SERVATOR~ES . ASTRONOMICAL OBSERVATORIES RT =EQUATIONS HELIOS SATELLITES . EQUATIONS OF MOTION . . ASTRONOMICAL SATELUTES . . . HEAO GS ARTIFICIAL SATELLITES HAMlLTONlAN FUNCTIONS . HEUOS SATELLITES RELATIVISTIC PARTICLES .... HU03 UNMANNED SPACECRAF! . . HEUOS A . HEAO 3 . . HEUOS 8 HANSEN LUNAR THEORY RT OAO . . HEUOS 1 RT EARTH ORBITS . . HELIOS 2 ORBITAL MECHANICS RT MAGNETIC FIELDS PERTURBATION THEORY HEAT BALANCE RT ATMOSPHERIC HEAT BUDGET PARTICLE FLUX DENSITY ce THEORIES BALANCE SOLAR FLUX DENSITY BOILERS HARD LANDING COMBUSTION HELlOS 1 GS LANDING MATERIAL BALANCE GS ARTIFICIAL SATELLITES . HARD LANDING PYROMETALLURGY . HELIOS SATELLITES RT AIRCRAFT LANDING THERMOCHEMICAL PROPERTIES . . HEUOS t CRASH LANDING THERMOCHEMISTRY UNMANNED SPACECRAFT LUNAR LANDING THERMODYNAMIC PROPERTIES . SPACE PROBES PLANETARY LANDING . . SOLAR PROBES SOFT LANDING . . . HEUOS 1 SPACECRAFT LANDING HEAW COSMIC RAY PRIMARIES WATER LANDING USE HEAW NUCLEI PRIMARY COSMIC RAYS HEUOS 2 GS ARTIFICIAL SATELLITES HARLETON anmourn . HELIOS SATELLITES GS CELESTIAL BODIES HEAW NUCLEI HEUOS 2 METEORITES UF HEAW COSMIC RAY PRIMARIES . . . UNMANNED SPACECRAFT HARLETON GS PARTICLES . . wrmurn SPACE PROBES AT IRON MEEORITES . CHARGED PARTICLES . . . SOLAR PROBES STONY METEORITES . . ENERGETIC PARTICLES . . . NUCLEI (NUCLEAR PHYSICS) . . . HEUOS 2 HEAVY NUCLEI HAWKEYE SATELLITES . . . . AT PRIMARY COSMIC RAYS HELIOSEISMOLOGY GS ARTIFICIAL SATELLITES UF SOLAR DYNAMICS SCIENTIFIC SATELLITES SOLAR SEISMOLOGY . . HAWKEYE SATELLITES HELIOCENTRIC ORBITS USE SOLAR ORBITS GS SEISMOLOGY . HELIOSEISMOLOGY HEAO RT ASTROPHYSICS UF HlGH ENERGY ASTRONOMY HEUOGRAPHS USE SPECTROHELIOGRAPHS mSClENCE OBSERVATORIES SOLAR INTERIOR GS OBSERVATORIES SOLAR PHYSICS . ASTRONOMICAL OBSERVATORIES HELIOGRAPHY . . Ab iRONOMlCAL SATELLITES USE SPECTROHELlOGRAPHS HELIOSPHERE HEAO . . . RT COSMIC RAYS . . . . HEAO 1 HEUOMAGNEllSM INTERPLANETARY SPACE . . . . HEAO 2 USE SOLAR MAGNETIC FIELD INTERSTELLAR GAS . . . . HEAO 3 SOLAR ACTIVITY EFFECTS RT OAO HEUOMmRS SOLAR WIND UF HELIOMETRY HEAO A GS MEASURING INSTRUMENTS HELIOSTATS USE HEAO 1 . HELIOMETERS RT r INSTRUMENTS . . PYROHELIOMETERS MIRRORS HEAO B OPTICAL EQUIPMENT REFLECTORS USE HEAO 2 . HELIOMETERS SERVOMOTORS . . PYROHELIOMETERS SOLAR REFLECTORS TELESCOPES HEAO C SYNCHRONIZERS USE HEAO 3 . HELIOMETERS . . PYROHELIOMETERS HELIUM AFTERGLOW HEAO I GS AFTERGLOWS UF HEAO A HELIOMETRY HELIUMAFTERGLOW HlGH ENERGY ASTRONOMY USE HELIOMETERS RT GAS IONIZATION OBSERVATORY A PYROHELIOMETERS PLASMA DECAY HlGH ENERGY ASTRONOMY OBSERVATORY 1 HELIOS A HELIUM STARS GS OBSERVATORIES GS ARTIFICIAL SATELLITES USE B STARS HELOS (SATELLITE)

HELOS (SATELLITE) HIOH GRAVITY ENVIRONMENTS HOHMANN TRANSFER ORBITS USE MOST SATELLITE UF HlGH GRAVITY (ACCELERATION) USE ELLIPTICAL ORBITS GS ENVIRONMENTS TRANSFER ORBITS HERBWRO OBJECTS . HIGH GRAVITY ENVIRONMENTS GS CELESTIAL BODIES RATES (PER TIME) HOMOSPHERE . NEBULAE . ACCELERATION (PHYSICS) GS EARTH ATMOSPHERE . . HERBWARO OBJECTS . . HIGH GRAVITY ENVIRONMENTS . HOMOSPHERE RT B STARS RT mACCELERATION RT BIOSPHERE m BODIES CENTRIFUGES CHEMOSPHERE INFRARED SOURCES (ASTRONOMY) EXTRATERRESTRIAL ENVIRONMENTS EARTH IONOSPHERE INFRARED STARS GRAVITATION LOWER ATMOSPHERE STELLAR RADIATION HUMAN CENTRIFUGES MESOSPHERE STELLAR SPECTRA REDUCED GRAVIN MIDDLE ATMOSPHERE ROTATING ENVIRONMENTS OZONOSPHERE STRATOSPHERE HERCULES NOVA HrnLATITUDES THERMOSPHERE GS CELESTIAL BODIES USE POLAR REGIONS TROPOSPHERE . STARS UPPER ATMOSPHERE . . VARIABLE STARS HlOH SPEED . . . NOVAE UF HlGH SPEED FLIGHT HORIZONTAL BRANCH STARS . . . . HERCULES NOVA GS RATES (PER TIME) GS CELESTIAL BODIES RT DWARF NOVAE . HlGH SPEED . STAR CLUSTERS VELOCIN . . GLOBULAR CLUSTERS HERTLSPRUNG-RUSSELL DIAGRAM . HIGH SPEED . . . HORIZONTAL BRANCH STARS UF HR DIAGRAM RT AIRSPEED RT COLOR-MAGNITUDE DIAGRAM GS DIAGRAMS ESCAPE VELOCITY HERTZSPRUNG-RUSSELL DIAGRAM . HERIZSPRUM(P-RWISEU DIAGRAM GROUND SPEED STELLAR EVOLUTION RT ASYMPTOTIC GIANT BRANCH STARS HYPERSONIC SPEED STELLAR LUMINOSITY COLORCOLOR DIAGRAM LANDING SPEED STELLAR SPECTRA COLOR-MAGNITUDE DIAGRAM UGHT SPEED STELLAR SPECTROPHOTOMETRY HORIZONTAL BRANCH STARS RELATIVISTIC VELOCITY STELLAR EVOLUTION ROTOR SPEED HOT STARS STELLAR LUMINOSITY SUPERSONIC SPEED GS CELESTIAL BODIES STELLAR SPECTRA . STARS HlGH SPEED FLIGHT . . EARLY STARS HERZBERG BANDS USE FLIGHT . . . HOT STARS GS SPECTRA HlGH SPEED . . . . A STARS . RADIATION SPECTRA . . . . B STARS ABSORPTION SPECTRA . . HIGH VACUW ORBITAL SIMULATOR . . . . . SIGMA ORIONIS HERZBERO BANDS . . . UF HlVOS ISIMULATOR) . . . . BLUE STARS SPECTRAL BANDS . SIMULATORS . . . . 0 STARS ABSORPTION SPECTRA GS . . ENVIRONMENT SIMULATORS . . . . WHITE DWARF STARS HERZBERG BANDS . ... SPACE SIMULATORS . . . . WOLF-RAYET STARS RT ;cBANOS . . . . . HIGH VACUUM ORBITAL RT CATACLYSMIC VARIABLES OXYGEN SPECTRA PECULIAR STARS SCHUMANN-RUNGE BANDS SIMULATOR RT SPACE ENVIRONMENT SIMULATION RED DWARF STARS ULTRAVIOLET SPECTRA

HREROSPHERE HlU CURVES HR DIAGRAM GS EARTH ATMOSPHERE USE HlLL METHOD USE HERTZSPRUNG-RUSSELL DIAGRAM . HREROSPHERE ENVIRONMENTS HIU LUNAR THEORY HUBBLE CONSTANT . HREROSPHERE RT EARTH ORBITS GS CONSTANTS RT CHEMOSPHERE ORBITAL MECHANICS . HUBBLE CONSTANT EARTH IONOSPHERE PERTURBATION THEORY RT COSMOLOGY EARTH MAGNETOSPHERE mTHEORlES GALAXIES EXOSPHERE IRREGULAR GALAXIES LOWER ATMOSPHERE HILL METHOD RED SHIFT MIDDLE ATMOSPHERE UF HlLL CURVES VELOCIN MEASUREMENT THERMOSPHERE RT EARTH ORBITS UPPER ATMOSPHERE mMETHOWLOGY HUBBLE DIAGRAM ORBITAL MECHANICS GS COSMOLOGY t HlGH ALTITUDE FLIGHT PERTURBATION THEORY . HUBBLE DIAGRAM USE FLIGHT RT BARRED GALAXIES HlGH ALTITUDE HIPPARCOS SATELLITE GALACTIC RADIATION GS ARTIFICIAL SATELLITES GALAXIES HlGH ECCENTRIC LUNAR OCCULTATION . ESA SATELLITES IRREGULAR GALAXIES SATEUlTE . . HIPPARCOS SATELLITE RED SHIFT USE EXOSAT SATELLITE ESA SPACECRAFT VELOCITY MEASUREMENT . ESA SATELLITES HlGH ENERGY ASTRONOMY OBSERVATORIES . . HIPPARCOS SATELUTE USE HEAO HUBBLE SPACE TELESCOPE RT ASTROMETRY UF LARGE SPACE TELESCOPE EUROPEAN SPACE PROGRAMS , La,.- I HlGH ENERGY ASTRONOMY OBSERVATORY A SPACEBORNE ASTRONOMY SPACE TELESCOPE USE HEAO 1 STELLAR MOTIONS GS ARTIFICIAL SATELLITES STELLAR PARALLAX . SCIENTIFIC SATELLITES HlGH ENERQY ASTRONOMY OBSERVATORY B . . ASTRONOMICAL SATELLITES USE HEAO 2 HlVOS (SIMULATOR) . . . HUBBLE SPACE TELESCOPE USE HlGH VACUUM ORBITAL SIMULATOR OBSERVATORIES HlGH ENERGY ASTRONOMY OBSERVATORY C . ASTRONOMICAL OBSERVATORIES USE HEAO 3 HOWGRAPHS . . ASTRONOMICAL SATELLITES RT CHAPLYGIN EQUATION . . HUBBLE SPACE TELESCOPE TELESCOPES HlGH ENERGY ASTRONOMY OBSERVATORY 1 KINEMATICS SPACEBORNE TELESCOPES USE HEAO 1 VECTOR SPACES . . HUBBLE SPACE TELESCOPE HOWSCOPES RT FAINT OBJECT CAMERA HlGH ENERGY ASTRONOMY OBSERVATORY 2 GS MEASURING INSTRUMENTS SPACE SHUTTLE PAYLOADS USE HEAO 2 RAOlATlON MEASURING INSTRUMENTS SPACEBORNE ASTRONOMY . . HOWSCOPES HlGH ENERGY ASTRONOMY OBSERVATORY 3 RADIATION COUNTERS USE HEAO 3 HUMASON COMET HOHMANN TRAJECTORIES GS CELESTIAL BODIES HlGH GRAVITY (ACCELERATION) USE ELLIPTICAL ORBITS COMETS USE HlGH GRAVITY ENVIRONMENTS TRANSFER ORBITS . HUMASON COMET ICE-(CONT.) IMAGE PROCESSING GS CELESTIAL BODIES . BAY ICE GS IMAGE PROCESSING . METEORITES . GLACIERS , BAND RATlOlNG . . STONY METEORITES . LAKE ICE . GEOMETRIC RECTIFICATION (IMAGERY) . . . CHONDRITES . . ICE FLOES RT ATMOSPHERIC CORRECTION . . . . HVllllS CWNDRITE . LAND ICE CHANGE DETECTION . SEA ICE CLUSTER ANALYSIS HYDROGEN CLows . . ICE FLOES COMPUTER AIDED TOMOGRAPHY GS HYDROGEN CLOUDS . . ICEBERGS DATA PROCESSING . H I REGIONS . . PRESSURE ICE FEATURE IDENTIFICATION AND . H II REGIONS RT AUWS (ICE) LOCATION EXPER . ORION NEBULA CIRQUES (IANDFORMS) FRAMES (DATA PROCESSING) RT mCLOUDS FROST GEOMETRIC ACCURACY DROP SIZE POLAR CAPS GRAY SCALE GALACTIC ROTATION REFRIGERANTS IMAGE ANALYSIS GASES RUNWAY CONDITIONS IMAGERY WULARCLOUDS SLUSH IMAGING TECHNIQUES PLASMA CLOUDS STORMS (METEOROLOGY) MULTISENSOR APPLICATIONS SPIN TEMPERATURE WATER NAP-OF-THE-EARTH NAVIGATION STAR FORMATION ONBOARD DATA PROCESSING OPTICAL DATA PROCESSING VAPOR PHASES ICY SATELUTES VAPORS POINT SPREAD FUNCTIONS GS CELESTIAL BODIES PREPROCESSING . NATURAL SATELLITES PRINCIPAL COMPONENTS ANALYSIS HYDROMAGNETICS . . ICY SATELLITES rn PROCESSING USE MAGNETOHYDRODYNAMICS . . . ARlEL PUSHBROOM SENSOR MODES . . . CALUSTO RASTER SCANN~NG HYMWlUGNRISY . . . DlONE SPATIAL RESOLUTION USE MAGNETOHYDRODYNAMICS . . . ENCELAWS . . . EUROPA IMAGERY GANYMEDE HYDROXYLEMlSSMW ... GS IMAGERY GS ELECTROMAGNETIC RADIATION . . . HYPERION . AERIAL PHOTOGRAPHY . RADIO WAVES . . . IAPENS . ALL SKY PHOTOGRAPHY . . RADIO EMISSION . . . MIMAS . ASTRONOMICAL PHOTOGRAPHY . . . HYDROXYL EM- . . . RHEA (ASTRONOMY) . BLACK AND WHITE PHOTOGRAPHY EMISSION . . . TETHYS . CHROMPWTOGRAPHY . RADIO EMISSION . . . TTTANIA . CINEMATOGRAPHY . . HYDROXYL EWlSSKm RT GAULEAN SATELuTrS . CBUD PHOTOGRAPHY RT EMISSION SPECTRA JUPITER SATELLITES . COLOR PHOTOGRAPHY RADIO SOURCES (ASTRONOMY) SATELUTE SURFACES . ELECTRO-OPTICAL PHOTOGRAPHY SATURN SATELLITES . ELECTRON PHOTOGRAPHY HYPERION . HOLOGRAPHY GS CELESTIAL BODIES ILLUMINANCE . . ACOUSTICAL HOLOGRAPHY . NATURAL SATELLITES SN (LIMITED TO DETECTION RATE PER . . MICROWAVE HOLOGRAPHY . . ICY SATELLITES UNIT AREA OF VISIBLE . . SPECKLE HOLOGRAPHY . . . HYPERION RADIATION-EQUALS LIGHT PRESSURE . . WHITE LIGHT HOLOGRAPHY . . SATURN SATELLITES TIMES SPEED OF LIGHT) . INFRARED IMAGERY . . . HYPERION UF LIGHT PRESSURE . INFRARED PHOTOGRAPHY RT SATURN (PLANET) GS PRESSURE . . COLOR INFRARED PHOTOGRAPHY . RADIATION PRESSURE . KINOFORM HYPERSONIC SPEED . . LUMINOUS INTENSITY . LUNAR PHOTOGRAPHY SN (MACH 5 OR GREATER) . . . ILLUMINANCE . MICROWAVE IMAGERY GS RATES (PER TIME) RATES (PER TIME) . MICROWAVE PHOTOGRAPHY . HYPERSONIC SPEED . FLUX DENSITY . PHOTOMICROGRAPHY VELOCITY . . RADIANT FLUX DENSITY . PHOTORECONNAISSANCE . HYPERSONIC SPEED . . . IRRADIANCE . PIXELS RT HIGH SPEED . . . . ILLUMINANCE . RADAR IMAGERY HYPERSONICS . . . LUMINOUS INTENSITY . RADAR PHOTOGRAPHY mHYPERVELOCITY . . . . ILLUMINANCE . RADIOGRAPHY SUPERSONIC SPEED RT BRIGHTNESS . . ANGIOGRAPHY ILLUMINATING . . AUTORADIOGRAPHY HYPERVELOCITY IMPACT mILLUMINATION . . NEUTRON RADIOGRAPHY GS IMPACT LIGHT (VISIBLE RADIATION) TOMOGRAPHY . HYPERVELOCITY IMPACT LUMINANCE COMPUTER AIDED TOMOGRAPHY RT HYDRODYNAMIC RAM EFFECT LUMINOSITY UROGRAPHY IMPACT MELTS RADIANCY REPRODUCTION (COPYING) MECHANICAL SHOCK SOLAR CONSTANT XEROGRAPHY METEORITE COLLISIONS SOLAR FLUX DENSITY ROCKET-BORNE PHOTOGRAPHY METEORITIC DAMAGE VISIBILITY SATELLITE IMAGERY POINT IMPACT SHADOWGRAPH PHOTOGRAPHY PROJECTILE CRATERING SCHLIEREN PHOTOGRAPHY IMAGE ANALYSIS SPACEBORNE PHOTOGRAPHY RT CLUSTER ANALYSIS SATELLITE-BORNE PHOTOGRAPHY IMAGE ENHANCEMENT SPECTROHELIOGRAPHS IMAGE PROCESSING SPECTROPHOTOGRAPHY IMAGE RESOLUTION STEREOSCOPY PATTERN RECOGNITION . . STEREOPHOTOGRAPHY RADAR IMAGERY . ULTRAVIOLET PHOTOMETRY- IAPENS REMOTE SENSING x RAY IMAGERY GS CELESTIAL BODIES SATELLITE IMAGERY RT ACOUSTO-OPTICS NATURAL SATELLITES . SCENE ANALYSIS APPEARANCE . . ICY SATELLITES ATMOSPHERIC 8 OCEANOGRAPHIC . . . IAPETUS INFORM SYS . . SATURN SATELLITES IMAGE INTENSlFlERS CHANGE DETECTION . . . IAPETUS UF INTENSIFIER TUBES CONTOUR SENSORS RT CHARON GS INTENSIFIERS DISPLAY DEVICES SATURN (PLANET) . IMAGE INTENSIFIERS EARTH RESOURCES . . IMAGE ORTHICONS GEOGRAPhlC INFORMATION SYSTEMS ICARUS ASTEROID RT AMPLIFIERS GEOMETRIC RECTIFICATION IIMAGERY! GS CELESTIAL BODIES IMAGING TECHNIQUES GRAPHIC ARTS . ASTEROID BELTS LALLEMAND CAMERAS GROUND TRUTH . . ASTEROIDS LlGHT AMPLIFIERS IMAGE PROCESSING . . ICARUS ASTEROID NIGHT VISION IMAGE RESOLUTION ORTHICONS MICROWAVE SOUNDING ICE PHOSPHORS MULTISPECTRAL PHOTOGRAPHY GS ICE PHOTOCATHODES MULTISPECTRAL RADAR IME SATELLITE

INDIAN SPACE PROGRAM INFRARED RADIATION-(CONX) ~TOGRAPHY GS PROGRAMS MICROWAVES RADAR SIGNATURES . SPACE PROGRAMS MONOCHROMATIC RADIATION SCENE ANALYSIS . . INDIAN SPACE PROGRAM PLANETARY RADIATION SEA TRUTH RT COMMUNICATION SATELLITES ~LARIZED ELECTROMAGNETIC SIGNATURE ANALYSIS MANNED SPACE FUGHT RADIATION mRESEARCH PROJECTS co RADIATION SATELLITE DESIGN SNFERT GAWIES lME SATELLITE SOLAR RADIATION USE INTERNATIONAL MAGNETOSPHERIC SPACE MISSIONS EXPLORER mSPACECRAFT SUNUGHT SPACECRAFT DESIGN TERRESTRIAL RADIATION TECHNOLOGY UnUZATION THERMAL RADIATION IMP WAVELENGTHS UF INTERPLANETARY MONITORING XENON LAMPS PLATFORM INDONESIAN SPACE PROMAM GS AR~F~CIALSATELLITES GS PROORAMS . SPACE PRCGRAMS INFRARED RAMOMETERS . LUNAR SATELUTES GS MONITORS . . IMP . . IWOOWESIAN SPACE PROGRAM RT INWNESIA . INFRARED RADIOMETERS . SCIENTIFIC SATELLITES RT AERIAL RECONNAISSANCE . EXPLORER SATELLITES PALAPA SATELLITES . PALAPA SATELLITE ATMOSPHERIC CORRECTION . . . IMP DATA ACQUISITION LUNAR SPACECRAFT EARTH RESOURCES PROGRAM . LUNAR SATELLITES INFRARED ASTRONOMY ENVIRONMENTAL MONITORING GS ASTRONOMY FOREST FlRE DETECTION INFRARED ASTRONOMY . PRESSURE MODULATOR RADIOMETERS IMP-A RT ASTRONOMICAL PHOTOGRAPHY RADIOMETRIC CORRECTION INFRARED ASTRONOMY SATELLITE USE EXPLORER 18 SATELUTE SATELLITE-BORNE INSTRUMENTS INFRARED PHOTOMETRY THERMAL MAPPING INFRARED SOURCES (ASTRONOMY) VISIBLE INFRARED SPIN SCAN IMP1 INFRARED SPACE OBSERVATORY (ISO) USE EXPLORER 18 SATELLITE SPACE INFRARED TELESCOPE FACILITY RADIOMETER

IMPACT INFRARED SOURCES (A!SIUONOMY) INFRARE[l ASTROMOMY SATEUJTE GS CELESTIAL BODIES GS IMPACT UF IRAS . ECONOMIC IMPACT . INFRARED SOURCES (ASTRONOMY) GS OBSERVATORIES INFRARED STARS . ELECTRON IMPACT ASTRONOMICAL OBSERVATORIES . . . RT ASTRONOMY . HYPERVELOCITY IMPACT ASTRONOMICAL SATELUVS . . HERBIG-HARO OBJECTS . ION IMPACT . . . INFRARED ASTROWMY SATEWE . POINT IMPACT INFRARED ASTRONOMY RT GEOSYNCHRONOUSORBITS INFRARED ASTRONOMY SATELLITE . PROTON IMPACT INFRARED ASTRONOMY INFRARED RADIATION RT DECELERATION INFRARED SOURCES (ASTRONOMY) HYDRODYNAMIC RAM EFFECT IRAS-ARAKI-ALCOCK COMET IMPINGEMENT INFRARED SPACE OBSERVATORY (ISO) MECHANICAL SHOCK INFRARED PHOTOGRAPHY GS ARTIFICIAL SATELLITES PENETRATION GS IMAGERY . ESA SATELLITES PERCUSSION . INFRARED PHOTOGRAPHY . . INFRARED SPACE OBSERVATORY PRESSURE . . COLOR INFRARED PHOTOGRAPHY US0) SHOCK ABSORBERS PHOTOGRAPHY ESA SPACECRAFT SHOCK RESISTANCE . MULTISPECTRAL PHOTOGRAPHY , ESA SATELLITES SHOCK WAVES . . INFRARED PWOtOQRAPHY . . INFRARED SPACE OBSERVATORY STRESSES ... COLOR INFRARED PHOTOGRAPHY (IS01 AT AERIAL PHOTOGRAPHY OB~ERVATORIE~ IMPACT ACCELERATION ASTRONOMICAL PHOTOGRAPHY . ASTRONOMICAL OBSERVATORIES UF IMPACT DECELERATION BLACK AND WHITE PHOTOGRAPHY . . ASTRONOMICAL SATELLITES GS RATES (PER nMm CINEMATOGRAPHY . . . INFRARED SPACE OBSERVATORY . ACCELERATION (PHYSICS) FAINT OBJECT CAMERA (IS01 . . IMPACT ACCELERATION FOREST FIRE DETECTION TELESCOPES RT rACCELERATlON GEOGRAPHIC INFORMATION SYSTEMS . SPACEBORNE TELESCOPES DECELERATION ICE MAPPING . . INFRARED SPACE OBSERVATORY MECHANICAL SHOCK LUNARPHOTOGRAPHY (I=) PHYSIOLOGICAL ACCELERATION METEOROLOGICAL SATELLITES RT EUROPEAN SPACE PROGRAMS RAILROAD HUMPING TESTS METEOSAT SATELLITE INFRARED ASTRONOMY SHOCK ABSORBERS MULTISPECTRAL BAND CAMERAS SPACEBORNE ASTRONOMY NIMBUS SATELLITES IMPACT DAMAGE RADIOMETERS INFRARED SPECTRA GS DAMAGE SATELLITE-BORNE PHOTOGRAPHY GS SPECTRA . IMPACT DAMACIE TIMBER INVENTORY RADIATION SPECTRA . . METEORITIC DAMAGE ULTRAVIOLET PHOTOGRAPHY ELECTROMAGNETIC SPECTRA . . RAIN IMPACT DAMAGE . . INFRARED SPECTRA RT CRATERING INFRARED PHOTOMETRY RT mABSORPTlON CRATERS GS OPTICAL MEASUREMENT EMISSION SPECTRA EJECTA . PHOTOMETRY INFRARED PHOTOMETRY IMPACT TOLERANCES . . INFRARED PHOTOMETRY INFRARED SIGNATURES MARS CRATERS RT ASTRONOMICAL PHOTOMETRY LINE SPECTRA METEOROID PROTECTION INFRARED ASTRONOMY MICROWAVE SPECTRA PLANETARY CRATERS INFRARED SPECTRA MOLECULAR SPECTRA NEAR INFRARED RADIATION SOLAR SPECTRA STELLAR SPECTRA IMPACT DECELERATION STELLAR SPECTROPHOTOMETRY USE DECELERATION IMPACT ACCELERATION INFRARED RADIATION INFRARED SPECTROMETERS GS ELECTROMAGNETIC RADIATION GS MEASURING INSTRUMENTS . INFRARED RADIATION OPTICAL MEASURING INSTRUMENTS IMPACT MELTS . . FAR INFRARED RADIATION INFRARED SPECTROMETERS GS MELTS (CRYSTAL GROWTH) . . NEAR INFRARED RADIATION FILTER WHEEL INFRARED . IMPACT MELTS RT BEAMS (RADIATION) SPECTROMETERS RT CELESTIAL BODIES BLACK BODY RADIATION RADIATION MEASURING INSTRUMENTS HYPERVELOCITY IMPACT COHERENT ELECTROMAGNETIC ACTINOMETERS LUNAR ROCKS RADIATION INFRARED SPECTROMETERS MELTING ENERGY ABSORPTION INFRARED INSTRUMENTS METEORITES EVAPOROGRAPHY INFRARED SPECTROMETERS MINERALS EXHAUST EMISSION SPECTROMETERS PETROLOGY HEAT INFRARED SPECTROMETERS INFRARED ABSORPTION FILTER WHEEL INFRARED IMS INFRARED SIGNATURES SPECTROMETERS USE INTERNATIONAL MAGNETOSPHERIC INFRARED SOURCES (ASTRONOMY) OPTICAL EOUIPMENT STUDY LIGHT (VISIBLE RADIATION) OPTICAL MEASURING INSTRUMENTS INTERPLANETARYSPACECRAFT

INFRARED SPECTROMETERS-(WNX) INTE~WACTIC MEDIA-(CONE) INTERPLANETARY FUGHT-(CONE) . . INFRARED SPECTROMETERS MASS DISTRIBUTION ASTRODYNAMICS . . . FILTER WHEEL INFRARED STEUAR WINDS EARTH-VENUS TRAJECTORIES SPECTROMrnRS FLYBY MISSIONS RT EBERT SPECTROMETERS INTERUOHTANE FLOORS INTERSTELLAR SPACECRAFT SOLAR SPECTROMETERS USE VALLEYS LONG DURATION SPACE FLIGHT MANNED MARS MISSIONS INFRARED SPECTROSCOPY INTERNATIONAL MAQNETWPHERK: EXPLORER MANNED SPACE FLIGHT GS SPECTROSCOPY UF IME SATELLITE MARINER JUPITER-SATURN FLYBY . INFRARED SPECTROSCOPY GS ARTIFICIAL SATEUmS MARINER JUPITER-URANUS FLYBY RT ABSORPTION SPECTROSCOPY . SClEMlFlC SATELLITES MARINER MARK 2 SPACECRAFT ~ONOMICALSPECTROSCOPY . . EXPLORER SATELLITES ORBITS CHEMICAL ANALYSIS . . . IKIERN*nONATINAL MAGNETOSPHERIC OUTER PLANETS EXPLORERS ELECTRON SPECTROSCOPY EXPLORUI PLANETARY LANDING LASU) SPECTROMRERS RT DELTA LAUNCH VEHICLE RETURN TO EARTH SPACE FLIGHT MOLECULAR SPECTROSCOPY EARTH MAGNETOSPHERE ROUND TRlP TRAJECTORIES MOLECULAR STRUCIURE SPACE EXPLORATION OPTOGALVANIC SPECTROSCOPY INTERNArnNAL MAQNETOSPHERK: STUDY SPACE NAVIGATION RAMAN SPECTROSCOPY UF IMS SPACECRAFT GUIDANCE SPECTROMETERS GS INVESTIGATION TOPS (SPACECRAFT) SPECTROSCOPIC ANALYSIS . INTERNATIONAL MAGNETOSPHERE VACUUM SPECTROSCOPY STUDY INTERPLANETARY GAS RT ATMOSPHERIC PHYSICS GS EXTRATERRESTRIAL MATTER INFRARED STARS EARTH MAGNETOSPHERE . COSMIC GASES . . INTERPLANETARY GAS GS CELESTIALBODIES EUROPEAN SPACE PROGRAMS INFRARED SOURCES (ASTRONOMY) GEOMAGNETISM GASES . RAREFIED GASES . . INFRARED STARS INTERPLANETARY MAGNETIC FIELDS . . STARS . . COSMIC GASES INTERPLANETARY GAS . . INFRARED STARS 1NTERNATK)NAL WlET SUN YEAR . . . RT HERBIG-HARO OBJECTS UF IOSY (INTERNATIONAL YEAR) MEDIA RT SOLAR ACTlVlTY . INTERPLANETARY MEDIUM . . INTERPLANETARY GAS INFRARED TELESCOPeS SOLAR CYCLES SOLAR PHYSICS RT COSMIC PLASMA GS TELEsCoPEs INTERSTEUAR GAS . INFRARED TELWCOPES NEUTRAL GASES . . SPACE INFRARED TELESCOPE IHTERNATmNAL SATELLITE GEODESY SOLAR WIND FACILITY EXPERIMENT UF ISAGEX RT ASTRONOMY INTERPLANETARY MAWETIC FIELDS ASTROPLANE AT CELESTIAL GEOMSY EUROPEAN SPACE PROGRAMS GS MAGNETIC FIELDS . INTERPLANETARY MAGNETIC FIELDS INJUN SATELLITES GEODETIC COORDINATES INTERNATIONAL COOPERATION RT CHAPMAN-FERRARO PROBLEM GS ARTIFICIAL SATELLITES INTERNATIONAL MAGNETOSPHERIC . IWUN SATELLITES SATELLITE TRACKING U.S.S.R. SPACE PROGRAM STUDY . . EXPLORER 25 SATELLITE - MAGNETIC CLOUDS . . INJUN 1 SATELLITE MAGNETIC FIELD RECONNECTION . . INJUN 3 SATELLITE INTERNATIONAL SOLAR POLAR MISSION SOLAR MAGNETIC FIELD . . INJUN 4 SATELLITE USE ULYSSES MISSION INTERPLANETARY MEDIUM INNER RADIATION BELT INTERNATIONAL ULTRAVIOLET EXPLORER GS MEDIA GS ENVIRONMENTS USE IUE . INTERPLANETARY MEDIUM . INNER RADIATION BELT . . INTERPLANETARY DUST PARTICLES . . . METEOROID DUST CLOUDS . CHARGED PARTICLES TRAJECTORIES . . . . ZODIACAL DUST . . MAGNmCALLY TRAPPED PARTICLES . INTERORBlTIL TRAJECTORIES . . INTERPLANETARY GAS . . . RADIATION BELTS INTERPLANETARY TRAJECTORIES RT MAGNETIC CLOUDS . . . . INNER RADIATION BELT ROUND TRlP TRAJECTORIES MASS DISTRIBUTION . TRAPPED PARTICLES SPACECRAFT TRAJECTORIES METEOROIDS . . MAGNETICALLY TRAPPED PARTICLES PLASMA CLOUDS . . . RADIATION BELTS INTERPLANETARY COMMUNICATION SOLAR WIND . . . . INNER RADIATION BELT GS TELECOMMUNICATION RT ARTIFICIAL RADIATION BELTS . SPACE COMMUNICATION INTERPLANETARY MONITORING PLATFORM OUTER RADIATION BELT . . INTEUPUNETARYCOMMUNICATION USE IMP PROTON BELTS RT CIRCUMLUNAR COMMUNICATION m RADIATION EXTRATERRESTRIAL COMMUNICATION INTERPLANETARY NAVIGATION SINGLE EVENT UPSETS FACSIMILE COMMUNICATION GS NAVIGATION LASERS . SPACE NAVIGATION INSERTION LUNAR COMMUNICATION . . INTERPLANETARY NAVIGATION RT COLLATING OPTICAL COMMUNICATION RT ASTRONAVIGATION EMBEDDING RADIO COMMUNICATION CELESTIAL NAVIGATION GRAFTING SATELLITE COMMUNICATION CELESTIAL REFERENCE SYSTEMS IMPLANTATION SPACECRAFT COMMUNICATION RADAR NAVIGATION IMPREGNATING RADIO NAVIGATION INSERTS INTERPLANETARY DUST NETWORK ANALYSIS GS MEDIA INTERPLANETARY PROPULSION TRANSMISSION LOSS . INTERPLANETARY MEDIUM USE INTERPLANETARY SPACECRAFT . . INTERPLANETARY DUST ROCKET ENGINES INSOLATION . . . METEOROID DUST CLOUDS RT GREENHOUSE EFFECT . . . . ZODIACAL DUST INTERPLANETARY SPACE METEOROLOGY PARTICLES UF TRANSLUNAR SPACE SOLAR HEATING ' . DUST GS ENVIRONMENTS SOLAR RADIATION . . COSMIC DUST AEROSPACE ENVIRONMENTS . . . INTERPLANETARY DUST SUNLIGHT . . DEEP SPACE . . . . METEOROID DUST CLOUDS INTERPLANETARY SPACE ZODIACAL DUST INTENSIFIER TUBES . . . . . EXTRATERRESTRIAL ENVIRONMENTS RT METEOROIDS USE IMAGE INTENSIFIERS . DEEP SPACE MlCROMETEOROlOS . . INTERPLANETARY SPACE INTERGALACTIC MEDIA RT CISLUNAR SPACE UF EXTRAGALACTIC MEDIA INTERPLANETARY EXPLORER HELIOSPHERE GS MEDIA USE EXPLORER 18 SATELLITE INTERSTELLAR SPACE INTERGALACTIC MEDIA POLAR CUSPS RT COOLING FLOWS (ASTROPHYSICS) INTERPLANETARY FLIGHT COSMIC DUST UF PLANETARY SPACE FLIGHT INTERPLANETARY SPACECRAFT COSMIC GASES GS SPACE FLIGHT UF INTERPLANETARY RROPULSION COSMIC PLASMA . INTERPUNETARY FLIGHT PLANETARY SPACECRAFT DARK MAiTER RT ASTEROID MISSIONS GS INTERPLANETARY SPACECRAFT INTERPLANETARY TRAJECTORIES

INTERPLANETARY SPACECM-(WNK) INTERPLANETARY SPACECRAFT-(~NK) INTERSIEUAR EXTINCTION-(CONK) , EXPLORER 18 SATELLITE . . . VENERA 12 SATELLITE GS EXTINCTION . JUPITER PROBES . . ZOND 1 SPACE PROBE . INTERSTELLAR EXTINCTION . . GALILK) PROBE . . ZOND 3 SPACE PROBE RT ASTROPHYSICS . . GALILEO SPACECRAFT . . ZOND 4 SPACE PROBE EVOLUTION (DEVELOPMENT) . MARINER SPACE PROBES . . ZOND 5 SPACE PROBE INTERSTELLAR GAS . . MARINER R 2 SPACE PROBE . . ZOND 6 SPACE PROBE RADIATION ABSORPTION . . MARINER 1 SPACE PROBE . . ZOND 7 SPACE PROBE STELLAR EVOLUTION . . MARINER 2 SPACE PROBE . . ZOND 8 SPACE PROBE STELLAR RADIATION . . MARINER 3 SPACE PROBE . VOYAGER 1 SPACECRAFT . . MARINER 4 SPACE PROBE . VOYAGER 2 SPACECRAFT lm-GS EXTFIATERRESTRIAL01s MATTER . . MARINER 5 SPACE PROBE . ZOND SPACE PROBES . . MARINER 6 SPACE PROBE . . ZOND 1 SPACE PROBE . COSMIC GASES . . MARINER 7 SPACE PROBE . . ZOND 2 SPACE PROBE . . INlmsmLLAR GAB . . MARINER 8 SPACE PROBE . . ZOND 3 SPACE PROBE . . . NEUTRAL GASES . . MARINER 9 SPACE PROBE . . ZOND 4 SPACE PROBE . IMERSTELLAR MATTER . . MARINER 10 SPACE PROBE . . ZOND 5 SPACE PROBE . . INTERSTELLAR GAS . . MARINER 11 SPACE PROBE . . ZOND 6 SPACE PROBE . . . NEUTRAL GASES . MARINER SPACECRAFT . . ZOND 7 SPACE PROBE GASES . . MARINER C SPACECRAFT . . ZOND 8 SPACE PROBE . RAREFIED GASES . . MARINER VENUS 67 SPACECRAFT RT ARTIFICIAL SATELLITES . . COSMIC GASES . MARS PROBES INTERSTELLAR SPACECRAFT . . . INTERSTELLAR GAS . . ADVANCED RECONN ELECTRIC LANDING MODULES . . . . NEUTRAL GASES SPACECRAFT MANEUVERABLE SPACECRAFT RT COOLING FLOWS (ASTROPHYSICS) . . MARINER 3 SPACE PROBE MANNED MARS MISSIONS H l REGIONS . . MARINER 4 SPACE PROBE MANNED SPACECRAFT H ll REGIONS . . MARINER 6 SPACE PROBE RENDEZVOUS SPACECRAFT HEUOSPHERE . . MARINER 7 SPACE PROBE REUSABLE SPACECRAFT INTERPLANETARY GAS . . MARINER 8 SPACE PROBE SPACE CAPSULES INTERSTELLAR EXTINCTION . . MARINER 9 SPACE PROBE SPACE EXPLORATION MAGNETIC CLOUDS . . MARS OBSERVER SPACE PROBES MOLECULAR CLOUDS ..MARS 1 SPACECRAFT m SPACECRAFT OPHlUCHl CLOUDS . . MARS 2 SPACECRAFT UNMANNED SPACECRAFT ORION NEBULA . . MARS 3 SPACECRAFT VOYAGER isn MISSION SPIN TEMPERATURE . . MARS 4 SPACECRAFT STAR FORMATION . . MARS 5 SPACECRAFT INTERPLANETARY TRAJECTORIES STELIAR MASS ACCRETION . . MARS 6 SPACECRAFT GS TRAJECTORIES STELLAR WINDS . . MARS 7 SPACECRAFT . SPACECRAFT TRAJECTORIES VIKING SPACECRAFT . . . . INTERPLANETARY TRAJECTORIES INTERSTELLAR MAGNETIC FIELDS . . . VIKING LANDER SPACECRAFT . . . EARTH-MARS TRAJECTORIES UF GALACTIC MAGNETIC FIELDS . . . . VlKlNG LANDER 1 . . . EARTH-MERCURY TRAJECTORIES GS MAGNETIC FIELDS . . . . VIKING LANDER 2 RT EARTH-MOON TRAJECTORIES . INTERSTELLAR MAGNETIC FIELDS . . . VIKING ORBITER SPACECRAFT EARTH-VENUS TRAJECTORIES RT MAGNETIC CLOUDS . . . . VIKING ORBITER 1 GODDARD TRAJECTORY STELLAR MAGNETIC FIELDS . . . . VIKING ORBITER 2 DETERMINATION SYSTEM . . . . VIKING ORBITER 1975 INTERORBITAL TRAJECTORIES INTERSTELLAR MASERS . . . VIKING 1 SPACECRAFT ORBITAL LAUNCHING . . . . VlKlNG LANDER 1 GS STIMULATED EMISSION DEVICES ORBITAL MECHANICS . MASERS . . . . VIKING ORBITER 1 PARKING ORBITS . . . VIKING 2 SPACECRAFT . . INTERSTELLAR MASERS PLANETARY ORBITS RT COHERENT ELECTROMAGNETIC . . . . VlKlNG LANDER 2 RENDEZVOUS TRAJECTORIES . . . . VlKlNG ORBITER 2 RADIATION ROUND TRIP TRAJECTORIES GAS MASERS . . VIKING 75 ENTRY VEHICLE SOLAR ORBITS . . ZOND 2 SPACE PROBE LASERS SPACE NAVIGATION MICROWAVE AMPLiFlERS . PIONEER SPACE PROBES SPACECRAFT GUIDANCE . . PIONEER VENUS 2 ENTRY PROBES MOLECULAR CLOUDS TRANSFER ORBITS RADIATION SOURCES . . . PIONEER VENUS 2 NIGHT PROBE VIKING LANDER SPACECRAFT . . . PIONEER VENUS 2 SOUNDER STIMULATED EMISSION VlKlNG LANDER f WATER MASERS PROBE VIKING LANDER 2 . . PIONEER 1 SPACE PROBE VlKlNG ORBITER SPACECRAFT . . PIONEER 2 SPACE PROBE VIKING ORBITER 1 INTERSTELLAR MATTER GS EXTRATERRESTRIAL MAlTR . . PIONEER 3 SPACE PROBE VIKING ORBITER 2 . INTERSTELLAR MATTER . . PIONEER 4 SPACE PROBE VIKING 1 SPACECRAFT . . DARK MATTER . . PIONEER 5 SPACE PROBE VIKING 2 SPACECRAFT . . PIONEER 6 SPACE PROBE . INTERSTELLAR GAS . . PIONEER 7 SPACE PROBE . . NEUTRAL GASES . . PIONEER 8 SPACE PROBE INTERPLANETARY TRANSFER ORBITS RT CELESTIAL BODIES . . PIONEER 9 SPACE PROBE GS ORBITS COSMIC DUST . . PIONEER 10 SPACE PROBE . ELLIPTICAL ORBITS FORMYL IONS . . TRANSFER ORBITS . . PIONEER 1I SPACE PROBE H I REGIONS . PIONEER VENUS SPACECRAFT . . . INTERPLANETARY TRANSFER H I1 REGIONS . . PIONEER VENUS 1 SPACECRAFT ORBITS INTERSTELLAR CHEMISTRY . . PIONEER VENUS 2 SPACECRAFT . SPACECRAFT ORBITS MASS DISTRIBUTION . TRANSFER ORBITS . . . PIONEER VENUS 2 TRANSPORTER . METALLlClTY BUS . . . INTERPLANETARY TRANSFER MOLECULAR CLOUDS . TOPS (SPACECRAFT) om NEBULAE VENUS PROBES RT AEROASSIST OPHlUCHl CLOUDS . AEROBRAKING . . MAGELLAN SPACECRAFT (NASA) ORION NEBULA AEROCAPTlJRE . . MARINER I SPACE PROBE REFLECTION NEBULAE . MARINER 2 SPACE PROBE AEROMANEUVERING SPIN TEMPERATURE . ORBITAL MECHANICS . . MARINER 5 SPACE PROBE STAR FORMATION MARINER 10 SPACE PROBE STELLAR MASS ACCRETION . . PIONEER VENUS 2 SPACECRAFT ...PIONEER VENUS 2 TRANSPORTER INTERSTELLAR CHEMISTRY INTERSTELLAR MICROWAVE SPECTRA BUS RT ASSOCIATION REACTIONS USE INTERSTELLAR RADIATION . . VENERA SATELLITES CHEMICAL REACTIONS MICROWAVE SPECTRA . . . VENERA 2 SATELLITE mCHEMISTRY . . VENERA 3 SATELLITE COSMOCHEMISTRY INTERSTELLAR RADIATION . VENERA 4 SATELLITE FORMYL IONS UF INTERSTELLAR MICROWAVE SPECTRA VENERA 5 SATELLITE INTERSTELLAR MATTER GS EXTRATERRESTRIAL RADIATION . . VENERA 6 SATELLITE MOLECULAR CLOUDS . INTERSTELLAR RADIATION . . VENERA 7 SATELLITE MOLECULAR INTERACTIONS RT CORPUSCULAR RADIATION . . VENERA 8 SATELLITE REACTION KINETICS COSMIC NOSE . . . VENERA 9 SATELLITE COSMIC RAYS . . . VENERA 10 SATELLITE INTERSTELLAR EXTINCTION ELECTROMAGNETIC RADIATION . . . VENERA 11 SATELLITE UF INTERSTELLAR REDDENING GALACTIC RADIATION IRON METEORITES

I~~LLARRADIATION-(GONI) IQNIZITION CUAMBERS-(CONI) IoNOSPneRIc ELECTRON DENSITY GAMMA RAY BURSTS . SPARK CHAMBERS GS DENSITY (NUMBERIVOLUME) m RADIATION RT mCHAMBERS . PARTICLE DENSITY (CONCENTRATION) RAMATIVE TRAN-R COUNTERS . . ELECTRON- -- DENSITY STELLAR RADIATION WSIMETERS (CONCENTRATION) ELECTRON COUNTERS . . . IONOSPHERIC ELECTRON DENSITY INTERSTELLAR REDDENING IONIZERS RT ARlEL 4 SATELLITE USE INTERSTELLAR EXTINCTION NEUTRON COUNTERS MAGNETOSPHERIC ELECTRON DENSITY RADIATION COUNTERS I- I- SPACE RAOIATION MEASURING ~NSTRUMENTS IONOSPHERIC ION DENSIN 05 ENVIRONMENTS THRESHOLD DETECTORS (DOSIMETERS) Gs DENSITY lNUMBERlVOLUMR . AEROSPACE ENVIRONMENTS . PARTICL~ DENSITY (CONCENTRATIC . . DEEP SPACE IONUATWN COUNTERS . . ION DENSITY (CONCENTRATION) . . . INTERSTEW SPACE USE IONIZATION CHAMBERS . . . IONOSPHERIC ION DENSiTY . EXlRATERRESlRIAL ENVIRONMENTS RADIATION COUNTERS RT MAGNETOSPHERIC ION DENSITY . . DEEP SPACE POSITIVE IONS . . . ItlTERSTELLAR SPACE RT INTEPQLANETARY SPACE IONIZED GASES IONOSPHERIC SOUNDING SN (LIMITED TO PARTIALLY IONIZED GASES; GS SOUNDING INTERSTELLAR SPACECRAFT SEE PLASMAS (PHYSICS) FOR . IONOSPHERK: SOUNDING RT INTERPLANETARY FLIGHT COMPLETELY IONIZED MATTER) RT ALOURTE PROJECT INTERPLANETARY SPACECRAFT GS GASES ALOURTE 1 SATELLITE INTERSTELLAR TRAVEL . IONIZED GASES ALOUETTE 2 SATELLITE SPACE EXPLORATION . . LORENTZ GAS ARIEL 4 SATELLITE PARTICLES ATMOSPHERIC SOUNDING . CHARGED PARTICLES IONOSONOES INTErnLLAR TRAVEL . IONIZED GASES GS SPACE FLIGHT . ORBlS . . . LORENTZ GAS ORBlS CAL SATELLITE . INTERSTELLAR TRAVEL RT COSMIC GASES RT ASTRONAVIGATION ROCKET SOUNDING ELECTRON GAS SATELLITE SOUNDING CELESTIAL REFERENCE SYSTEMS FOKKER-PLANCK EQUATION EXTRATERRESTRIAL INTEWGEMCE GAS IONIZATION INTERmLLAR SPACECRAFT IONOSPnERIC STORMS GAS TEMPERATURE GS IONOSPHERIC DISTURBANCES LONG DURATION SPACE FLIGHT H II REGIONS MANNED SPACE FLIGHT . IONOSPHERIC STORMS HIGH TEMPERATURE GASES . . SUDDEN IONOSPHERIC PLASMAS (PHYSICS) DISTURBANCES 10 RECOMBINATION COEFFICIENT STORMS GS CELESTIAL BODIES IONOSPHERIC STORMS NATURAL SATELLITES . . SUDDEN IONOSPHERIC JUPITER SATELLITES IONIZED PUSMAS . . . . DISTURBANCES GALILEAN SATELUTES USE PLASMAS (PHYSICS) . . . RT aDlSTURBANCES 10 .... EARTH IONOSPHERE RT CALLISTO IONOPAUSE IONOSPHERICS CHARON SN (EXCLUDES PLASMAPAUSE) NOISE STORMS GANYMEDE RT COMETARY ATMOSPHERES SOLAR STORMS JUPITER (PLAN0 PLANETARY ATMOSPHERES SPREAD F PLASMAPAUSE TRAVELING IONOSPHERIC SPACE PLASMAS ION CHAMBERS DISTURBANCES USE lONlZATlON CHAMBERS VENUS ATMOSPHERE IONOSPHERICS ION CYCLOTRON RADIATlON IONOSPUERE-nUGNETOSPnERE COUWNG ' GS ELECTROMAGNETIC INTERFERENCE GS ELECTROMAGNETIC RADIATION USE MAGNETOSPHERE-IONOSPHERE . RADIO FREQUENCY INTERFERENCE . NONTHERMAL RADIATION COUPLING . . ELECTROMAGNETIC NOISE . . CYCLOTRON RADIATION . . . ATMOSPHERICS . . . ION CYCLOTRON RADIATION m IONOSPHERES . . . . IONOSPHERICS RT CYCLOTRON RESONANCE SN (USE OF A MORE SPECIFIC TERM IS . . . . . DAWN CHORUS-- - IONIC WAVES RECOMMENDEPCONSULT THE TERMS . . . . . HISS MAGNETIC PUMPING LISTED BELOW RT IONOSPHERIC STORMS PLASMA RADIATION RT EARTH IONOSPHERE RADIO AURORAS PLASMA WAVES MAGNETOSPHERE-IONOSPHERE a RADIATION COUPLING IQSY (INTERNATIONAL YEAR) PLANETARY IONOSPHERES USE INTERNATIONAL QUIET SUN YEAR ION DENSiTY (CONCENTRATION) GS DENSITY (NUMBERIVOLUME) . PARTICLE DENSITY (CONCENTRATION) IONOSPHERIC COMPOSlTION IRAS GS COMPOSITION (PROPERTY) USE INFRARED ASTRONOMY SATELLITE . ION DENSITY (CONCENTRATlON) . ATMOSPHERIC COMPOSITION . IONOSPHERIC ION DENSITY . . IONOSPHERIC COMPOSITION MAGNETOSPHERIC ION DENSITY . . IRAS-ARAKI-ALCOCK COMET . . . RT ATOM CONCENTRATION . . . . MAGNETOSPHERIC PROTON GS CELESTIAL BODIES CHEMICAL COMPOSITION DENSITY . COMETS GAS COMPOSITION . . PROTON DENSITY . . IRAS-ARAKI-ALCOCK COMET . IONIZATION (CONCENTRATION\ RT INFRARED ASTRONOMY SATELLITE . MAGNETOSPHERIC'PROTON PARTICLE DENSITY (CONCENTRATION) SOLAR SYSTEM . . . PLASMA COMPOSITION DENSITY SATELLITE ATMOSPHERES RT ATMOSPHERIC DENSITY IRIS SATELLITES ATOM CONCENTRATION GS ARTIFICIAL SATELLITES COSMIC RAYS IONOSPHERIC DISTURBANCES . IRIS SATELLITES EARTH IONOSPHERE GS IONOSPHERIC DISNRBANCES RT EUROPEAN SPACE PROGRAMS ELECTRON DENSITY (CONCENTRATION) . IONOSPHERIC STORMS SATELLITE OBSERVATION GERDIEN CONDENSERS . . SUDDEN IONOSPHERIC SOLAR ACTIVITY IONIZATION DISTURBANCES SOLAR CYCLES IONOGRAMS . TRAVELING IONOSPHERIC SOLAR ENERGY PLASMA DENSITY DISTURBANCES SOLAR FLARES POSITIVE IONS RT BLACKOUT (PROPAGATION) SOLAR RADIATION SAHA EQUATIONS mDlSTURBANCES SOLAR SENSORS SPACE DENSITY IONOSPHERIC NOISE MAGNETIC VARIATIONS IRON METEORITES lONlZATlON CHAMBERS UF SIDERITE METEORITES UF ION CHAMBERS IONOSPHERIC DRIFT GS CELESTIAL BODIES IONIZATION COUNTERS RT lrDRlFT . METEORITES GS IONIZATION CHAMBERS DRIFT RATE . . IRON METEORITES . BUBBLE CHAMBERS ELECTROJETS . . . AROOS METEORITE . CLOUD CHAMBERS MAGNETIC RIGIDITY . . . ODESSA METEORITE . GEIGER COUNTERS POLARIZATION (CHARGE SEPARATION) . . . SIKHOTE-ALIN METEORITE . PROPORTIONAL COUNTERS RADIATION BELTS RT ACHONDRITES IFION METEORITES-(CONZ) IUE-(CONE) JUPITER AT~~OSPHERE-(CONZ) HARLETON M€lEORlTE . ASTRONOMICAL OBSERVATORIES GEOPHYSICAL FLUID FLOW CELLS KAMACITE . . ASTRONOMICAL SATELLITES JUPITER (PLANET) WAREV MrnORITE . . . IUE JUPITER RlNGS METEORITIC COMPOSITION RT EXPLORER SATELLITES PLANETARY IONOSPHERES METEORITIC MICROSTRUCTURES EXTREME ULTRAVIOLET EXPLORER PLANETARY METEOROLOGY OKHANSK METEORITE SATELUTE SCHREIBERSITE RADIO ASTRONOMY JUPITER PROBES STONY METEORITES SPACEBORNE ASTRONOMY GS INTERPLANETARY SPACECRAFT TR~ILITE ULTRAVIOLET RADIATION . JUPITER PROBES WIDMANSTATEN STRUCTURE . . GAULEO PROBE . . GALILEO SPACECRAFT UNMANNED SPACECRAFT IRRADIATION GS CELESTIAL BODIES GS tRRADMn0N . METEORITES . SPACE PROBES . AURORAL IRRADIATION . . STONY METEORITES . . JUPmR PROBES . ELECTRON IRRADIATION . . . CHONDRITES . . . GAULEO PROBE . ION IRRADIATION . . . . CARBONACEOUS METEORITES . . . GALILEO SPACECRAFT . . DEUTERON IRRADIATION RT GAULEO PROJECT . . PROTON IRRADIATION JUPITER (PLANET) . NEUTRON IRRADIATION IZSAK ELLIPSOID VOYAGER 1 SPACECRAFT VOYAGER 2 SPACECRAFT . X RAY IRRADIATION USE ELLIPSOIDS RT ACTIVATION GEODESY BEAMS (RADIATION) s EOMBARDMENT JUPITER PROJECT DOSIMETERS GS PROGRAMS ELECTROMAGNETIC ABSORPTION . NASA PROGRAMS ELECTRON PROBES . . NASA SPACE PROGRAMS EMISSION . . . JUPITER PROJECT EXCITATION JANUS . PROJECTS EXPOSURE GS CELESTIAL BODIES . . JUPITER PROJECT FLUX DENSITY . NATURAL SATELLITES . SPACE PROGRAMS IONIZING RADIATION . . SATURN SATELUTES . . NASA SPACE PROGRAMS LASER INDUCED FLUORESCENCE . . . JANUS . . . JUPITER PROJECT NUCLEAR CAPTURE RT SATURN (PLANET) NUCLEAR FUSION NUCLEAR RADIATION JAPANESE SPACE PROGRAY JUPmR RED SPOT PRESERVING GS PROGRAMS RT GAS GIANT PLANETS *RADIATION . SPACE PROGRAMS JUPITER (PLANET) RADIATION DOSAGE . . JAPANESE SPACE PROGRAM PLANETARY SURFACES RADIATION EFFECTS RT METEOROLOGICAL SATELLITES PLANETS RADIATION MEASUREMENT m RESEARCH PROJECTS SURFACE PROPERTIES RADIATION TOLERANCE SATELUTE DESIGN TOPOGRAPHY RADIOBIOLOGY SPACE MISSIONS RADIOGRAPHY SPACE TRANSPORTATION JUPITER RlNGS TARGETS =SPACECRAFT GS CELESTIAL BOfllES SPACECRAFT DESIGN . PLANETARY RlNGS IRREGULAR GALAXIES . . JUPITER RINGS GS CELESTIAL BODIES RT JUPITER (PLANET) JET FLAWS GAWIES JUPITER ATMOSPHERE . USE FLAMES IRREGULAR GALAXIES JUPITER SATELUTES . . JET FLOW RT BL LACERTAE OBJECTS PLANETARY COMPOSITION GALACflC RADIATION PLANETARY STRUCTURE . GALACTIC ROTATION JlmR PLANETOLOGY GALACTIC STRUCTURE USE VIBRATION -RINGS GUM NEBULA SATURN RlNGS HUBBLE CONSTANT JODREU BANK OBSERVATORY SPACE EXPLORATION HUBBLE DIAGRAM GS OBSERVATORIES URANUS RlNGS NEBULAE . JODRELL BANK OBSERVATORY VOYAGER I SPACECRAFT ORION NEBULA RT ASTRONOMICAL OBSERVATORIES QUASARS GROUND STATIONS JUPITER SATELLITES RADIO SOURCES (ASTRONOMY) RADIO TELESCOPES GS CELESTIAL BODIES RED SHlFF . NATURAL SATELLITES STAR CLUSTERS . . JUPITER SATELLITES STARS JUPITER (PLANET) . . . AMALTHEA GS CELESTIAL BODIES . . . GALILEAN SATELLITES IRREGULAR VARIABLE STARS . PLANETS . . . CALLISTO GS CELESTIAL BODIES . . GAS GIANT PLANETS . . EUROPA . STARS . . . JUPITER (PLANET) .... GANYMEDE . . VARIABLE STARS RT AMALTHEA ....10 . . . IRREGULAR VARIABLE STARS AMOR ASTEROID RT ICY SATELLITES . . . . R CORONAE BOREALIS STARS AWLLO ASTEROIDS JUPITER (PLANET) RT CARBON STARS CALLISTO JUPITER RlNGS SEMIREGULAR VARIABLE STARS EUROPA SOLAR SYSTEM GALILEAN SATELLITES ISAGEX GALILEO PROBE USE INTERNATIONAL SATELLITE GEODESY GALILEO SPACECRAFT EXPERIMENT GANYMEDE 10 ISOPHOTES JUPITER ATMOSPHERE RT a ILLUMINATION JUPITER PROBES K LINES JUPITER RED SPOT GS SPECTRA ITALIAN SPACE PROGRAM JUPITER RlNGS RADIATION SPECTRA GS PROGRAMS JUPITER SATELLITES ELECTROMAGNETIC SPECTRA SPACE PROGRAMS VOYAGER 1 SPACECRAFT LINE SPECTRA . ITALIAN SPACE PROGRAM VOYAGER 2 SPACECRAFT K LINES RT EUROPEAN-. - - SPACE PROGRAMS VOYAGER 1977 MISSION RT ABSORPTION SPECTRA ITALY EMISSION SPECTRA ORBITING FROG OTOLITH JUPITER ATMOSPHERE H LINES SlRlO SATELLITE GS ENVIRONMENTS EXTRATERRESTRIAL ENVIRONMENTS K STARS IUE PLANETARY ENVIRONMENTS GS CELESTIAL SODIES UF INTERNATIONAL ULTRAVIOLET PLANETARY ATMOSPHERES STARS EXPLORER JUPITER ATMOSPHERE LATE STARS SAS-D RT AEROSPACE ENVIRONMENTS COOL STARS GS OBSERVATORIES GALILEO PROJECT K STARS LlBRATlON

K STAW(CONZ) LAMBDA TAURI STARS-(CONT) LATE STARS RT DWARF STARS . . . . ECLIPSING BINARY STARS GS CELESTIAL BODIES GIANT STARS . . . . . LAMBDA TAURI STARS . STARS MAIN SEQUENCE STARS . . VARIABLE STARS . . LATE STARS STEW SPECTRA . . . LAMBDA TAURI STARS . . . COOL STARS SUPERGIANT STARS . . . . CARBON STARS LAMINAR FLAMES . . . . FLARE STARS KAMAcm USE FLAMES . . . . K STARS GS ALLOYS LAMINAR FLOW . . . . M STARS . NICKEL ALLOYS . . . . . VAN BIESBROECK STAR . . KAMACITE LANDING . . . . MlRA VARIABLES MINERALS Gs LANDING . . . . . OMICRON CETl STAR .KAYICCIE . AIRCRAFT LANDING . . . . S STARS RT IRON ALLOYS . . CRASH LANDING RT ASYMPTOTIC GIANT BRANCH STARS IRON METEORITES . . . DITCHING (LANDING) DWARF STARS METEORITIC COMPOSITION . . SKID LANDINGS EARLY STARS . BLIND LANDING GIANT STARS KAPOETA ACHONDRITE . GLIDE LANDINGS MAIN SEQUENCE STARS GS CELESTIAL BODIES . . HORIZONTAL SPACECRAFT LANDING RED DWARF STARS . METEORITES . HARD LAWNG RED GIANT STARS . . STONY METEORITES . SOFT LANDING STELLAR EVOLUTION . . . ACHONDRITES . SPACECRAFT LANDING SUBGIANT STARS . . . . KAPOETA ACHONDRITE . HORIZONTAL SPACECRAFT LANDING . . LUNAR LANDING LAUNCH DATlLS KEPLER LAWS . . MARS LANDING RT LAUNCHING GS CLASSICAL MECHANICS . . PLANETARY LANDING SPACECRAFT LAUNCHING . SPACE MECHANICS . TOUCHWWN TIME . . ORBITAL MECHANICS . VERTICAL LANDING TURNAROUND (STS) . . . KEPLER LAWS . WATER LANDING LAWS . . DITCHING (LANDING) LAVA . KEPLER LAWS RT AIR TRAFFIC CONTROL GS EFNSIVES APPROACH . LAVA KILOMETER WAVE ORWl'ING TEQSCOPE APPROACH AN0 LANDING TESTS (STS) RT AGGREGATES GS RADIO EQUIPMENT ARRIVALS CALDERAS . RADIO TELESCOPES GUIDANCE (MOTION) CONES (VOLCANOES) . . KlLOYgTER WAVE ORBmNQ INSTRUMENT FUGHT RULES EARTH RESOURCES TEWCOPE IN!SI'FIUMENT LANDING SYSTEMS IGNEOUS~C~KS- TELESCOPES--- MANEUVERS MAGMA . RADIO TELESCOPES RUNWAYS MARIA . . KILOMETER WAVE ORBmNG TAKEOFF MARS VOLCANOES TELESCOPE VISUAL FLIGHT MINERALS REGOLITH KILOMETRIC WAVES LANDING MOWLES RHYOLITE GS ELECTROMAGNETIC RADIATION GS MODULES ROCKS . KILOMETRIC WAVES . SPACECRAFT MODULES RT -WAVES . . LANDINQ MODULES . . . LUNAR LANDING MODULES KOH~UTEKCOMET . . . . LUNAR MODULE GS CELESTIAL BODIES . . . . . LSSM LAZAREV METEORITE . COMETS . . . MARS EXCURSION MODULE GS CELESTlAL BODIES . . KOHOUTEK COMET SOFT LANDING SPACECRAFT . METEORITES RT BESSEL-BREDICHIN THEORY . LANDING MOWLES . . LAZAREV METEORITE m COMA . . LUNAR LANDING MODULES RT IRON METEORITES RADIATION PRESSURE . . . LUNAR MODULE STONY METEORITES SOLAR SYSTEM . . . . APOLLO LUNAR EXPERIMENT MODULE LDEF LSSM KREEP . . . . USE LONG DURATION EXPOSURE FACILITY GS MINERALS . . . . LUNAR MODULE 5 KREEP . . . . LUNAR MODULE 7 LEM (LUNAR MOWLE) . MARS EXCURSION MODULE ROCKS . . USE LUNAR MODULE LUNAR ROCKS SPACECRAFT COMPONENTS . SPACECRAFT MODULES KREEP . LENS DESIGN . . LANDING MODULES RT GEOLOGY . RT ANTIREFLECTION COATINGS LUNAR LANDING MODULES LUNAR SOIL . . COMPUTER AIDED DESIGN LUNAR MODULE- --- PHOSPHATES r DESIGN LSSM POTASSIUM . . . . . GRADIENT INDEX OPTICS MARS EXCURSION MODULE RARE EARTH ELEMENTS . . . LENSES RT APOLLO SPACECRAFT OPTICAL CORRECTION PROCEDURE INTERPLANETARY SPACECRAFT mOPTlCS LAUNCH VEHICLES PRODUCT DEVELOPMENT MANEUVERABLE SPACECRAFT STlGMATlSM MANNED SPACECRAFT ZOOM LENSES REENTRY VEHICLES REUSABLE SPACECRAFT LAUEMAND CAMERAS SPACE CAPSULES LEO ENVIRONMENTS GS OPTICAL EQUIPMENT SPACECRAFT DOCKING MODULES USE EARTH ORBITAL ENVIRONMENTS . CAMERAS . . LALLEMAND CAMERAS LANDING sms LEONID METEOROIDS PHOTOGRAPHIC EQUIPMENT GS SITES GS CELESTIAL BODIES CAMERAS . LANDING SITES METEOROID SHOWERS . . LALLEMAND CAMERAS . . LUNAR LANDING SITES . . LEONID METEOROIDS RT ASTRONOMICAL PHOTOGRAPHY RT HELIPORTS . METEOROIDS ELECTRO-OPTICAL PHOTOGRAPHY RECOVERY ZONES LEONID METEOROIDS IMAGE CONVERTERS RUNWAYS ,MAG€ INTENSIFIERS TRAJECTORY CONTROL LESA (LUNAR EXPLORATION SYSTEM) IMAGE TRANSDUCERS USE LUNAR EXPLORATION SYSTEM FOR LIGHT AMPLIFIERS LANDSCAPE APOLLO SPECTROSCOPY USE TERRAIN TELEVISION CAMERAS TOPOGRAPHY LlBRATlON RT EARTH LlMB LAMBDA TAURI STARS LARGE INFRARED TELESCOPE ON SPACELAB LISSAJOUS FIGURES GS CELESTIAL BODIES USE LlRTS (TELESCOPE) LUNAR FAR SIDE . STARS LUNAR LlMB . . DOUBLE STARS LARGE SPACE TELESCOPE r MOTION . . . BINARY STARS USE HUBBLE SPACE TELESCOPE NUTATION LIBRA'610NAL MOTION

UBUATION-(WNX) LIGHT (VISIELE RADIATIONF.(WNX) m UMBB ORBITAL RESONANCES (CELESTIAL SOLAR RADIATION SN (USE OF A MORE SPECIFIC TERM IS MECHANICS) THERMAL RADIATION RECOMMENDED-CONSUL T THE TERMS PRECESSION TRANSMIlTANCE LISTED BELOW) ROTATION ULTRAVIOLET SPECTRA RT EARTH LIMB VISIBILITY LlMB BRIGHTENING VISIBLE SPECTRUM LlMB DARKENING UBRATIONAL MOTION LIMBS (ANATOMY) RT LAGRANGE COORDINATES LUNAR LlMB m MOTION UGHT CURVE RT -CURVES PLANETARY LlMB - NWA~ION SOLAR UMB ORBITAL RESONANCES (CELESTIAL UGHT WSlBLE RADIATION) MECHANICS) STELLAR RADIATION UNE 01: SIGHT LIGHT wR*noH RT AREA UFE DETECTORB USE FLASH COORDINATES RT BIOSATELLITES WLSE DURATION m DIRECTION sDETECTORS LOCI EXTRATERRESTRIAL LIFE TARGETS UQHT EMISSON UF OPTICAL EMISSION UGHT (VISIBLE RADIATION) GS EMISSION LlNE SPECTRA UF EXTRAGALACTIC LlGHT LlGHT EMISSION UF SPECTRAL LlNES OPTICAL SPECTRUM . . . INCANDESCENCE GS SPECTRA VISIBLE RADIATION . . LUMINESCENCE . RADIATION SPECTRA GS ELECTROMAGNETIC RADlATiON . . BIOLUMINESCENCE . . ELECTROMAGNETIC SPECTRA UGHT lVlSlBLE RADIATION) . . CATHODE GLOW . . . UNE SPECTRA COHERENT LIGHT . . . . . CAMOWLUMINESCENCE . . . . BALMER SERIES GEGENSCHEIN . . . . . CHEMILUMINESCENCE . . . . D UNES UGHT BEAMS . . . . . ELECTROLUMINESCENCE . . . . ELECTRONIC SPECTRA POLARIZED LIGHT . . . . . FLUORESCENCE . . . . FRAUNHOFER LlNES SKY RADIATION . . . . . LASER INDUCED FLUORESCENCE . . . . H LINES AIRGLOW ...... PHOSPHORESCENCE . . . . . H ALPHA LlNE GEOCORONAL EMISSIONS ...... RESONANCE FLUORESCENCE . . . . . H BETA LlNE NIGHTGLOW ...... X RAY FLUORESCENCE . . . . . H GAMMA LlNE TWlUGHT GLOW ...... LUNAR LUMINESCENCE . . . . K LINES DAYGLOW ...... OPTICAL RESONANCE . . . . LYMAN SPECTRA SUNUGHT . . . . . PHOTOLUMINESCENCE . . . . PASCHEN SERIES ZODIACAL UGHT ...... TRIBOLUMINESCENCE . . . . RYDBERG SERIES RT ATMOSPHERIC RADIATION . . . . TELLURIC LlNES ATTENUATION . . . . x RAYFLUORESCENCE SHOCK WAVE LUMINESCENCE RT ABSORPTION SPECTRA BEAMS (RADIATION) . . . SONOLUMINESCENCE ATOMIC ENERGY LEVELS BLACK BODY RADIATION ...... SPACECRAFT GLOW BOHR THEORY BRIGHTNESS EMISSION SPECTRA CERENKOV RADIATION . . . THERMOLUMINESCENCE RT AIRGLOW FINE STRUCTURE COHERENT ELECTROMAGNETIC AURORAL ABSORPTION FLAME SPECTROSCOPY RADIATION FREQUENCIES COHERENT RADIATION AURORAL IONIZATION AURORAL SPECTROSCOPY HYPERFINE STRUCTURE COLOR INFRARED SPECTRA CRITICAL FREQUENCIES AURORAS DIFFRACTION RADIATION LlGHT (VISIBLE RADIATION) DARKNESS m LlNES DlCHROlSM DIMMING ELECTROMAGNETIC RADIATION M~LECULARSPECTROSCOPY ELECTROMAGNETIC SPECTRA OSCILLATOR STRENGTHS ENERGY ABSORPTION UNEAR POLARIZATION ce OPTICS PRESSURE BROADENING EXCITONS RAMAN SPECTRA EXTRATERRESTRIAL RADIATION SELF SUSTAINED EMISSION SKY BRIGHTNESS RAMAN SPECTROSCOPY m FLASH SPECTRAL EMISSION RESONANCE LlNES GEOMETRICAL OPTICS SEYFERT GALAXIES GLARE STIMULATED EMISSION WHITE HOLES (ASTRONOMY) SOLAR SPECTRA ILLUMINANCE SPECTRAL BANDS INCANDESCENCE SPECTRAL EMISSION UGwT INTENSITY INFRARED RADIATION SPECTRAL ENERGY DISTRIBUTION USE LUMINOUS INTENSITY LlGHT CURVE SPECTRAL LlNE WIDTH LIGHTING EQUIPMENT SPECTRAL RESOLUTION LlNE SPECTRA UGHT PRESSURE SPECTROGRAMS LUMENS USE ILLUMINANCE SPECTRUM ANALYSIS LUMINAIRES STARK EFFECT LUMINANCE. LlGHT SPEED STELLAR SPECTRA LUMINESCENCE GS RATES (PER TIME) ULTRAVIOLET SPECTRA LUMINOSITY . LlGHT SPEED VISIBLE SPECTRUM LUMINOUS INTENSITY VELOCITY MONOCHROMATIC RADIATION . LIGHT SPEED NEAR INFRARED RADIATION LIRlS (TELESCOPE) RT HIGH SPEED UF LARGE INFRARED TELESCOPE ON NEAR ULTRAVIOLET RADIATION RELATIVISTIC VELOCITY OPACITY SPACELAB SCHWARZSCHILD METRIC OPTICAL DEPOLAhlZATION GS TELESCOPES OPTICAL EMISSION SPECTROSCOPY SPACEBORNE TELESCOPES OPTICAL MEASUREMENT UMB BRIGHTENING URlS (TELESCOPE) OPTICAL PROPERTIES RT 8 STARS RT EUROPEAN SPACE AGENCY *OPTICS BRIGHTNESS PAYLOADS PHOTICS BRIGHTNESS TEMPERATURE SPACE SHUTTLES PHOTOMETRY .a LIMBS SPACELAB PHOTONS SOLAR FLUX PHOTONUCLEAR REACTIONS SOLAR FLUX DENSITY LISWOUS FIGURES PHOTOPHILIC PLANTS SOLAR GRANULATION RT ECCENTRIC ORBITS PHOTOPHORESIS SOLAR LlMB EQUATIONS OF MOTION PHOTOSENSITIVITY STELLAR ATMOSPHERES LIBRATION PLANETARY RADIATION STELLAR LUMINOSITY LUNAR ORBITS POLARIZED ELECTROMAGNETIC SATELLITE ORBITS RADIATION LlMB DARKENING POLARIZERS GS DARKENING LITHOLOGY z RADIATION . LlMB DARKENING GS GEOLOGY RAMAN SPECTRA RT B STARS LITHOLOGY REFLECTION BINARY STARS RT REGOLITH REFRACTION *LIMBS ROCKS REFRACTIVITY SOLAR LlMB SHADOWS STELLAR ATMOSPHERES LITHOSPHERE SKY BRIGHTNESS STELLAR LUMINOSITY GS LITHOSPHERE LUMINOUS INTENSIN

~J~~~HERE-(CONT.) LW WA~RAOIA~ION-(WNT.) LUMINANCE-(CONI) . EARTH CORE SOLAR RADIATION ILLUMINANCE . EARTH CRUST ILLUMINATING m INTENSITY . EARTH MANTLE LOOK ANGLES (TRACKING) . EARTH SURFACE IRRADIANCE GS GEOMETRY LlGHT NlSlBLE RADIATION) RT EARTH PLANETARY STRUCTURE EUCLIDEAN GEOMETRY . LUMENS PLANETARY MANTLES ANGLES (GEOMETRY) . . OPTICAL PROPERTIES PLATES (TECTONICS) ANGLES (TRACKING) . . . LooK PHOTOMETRY SUBDUCTION (GEOLOGY) RT AZIMUTH SKY BRIGHTNESS ELEVATION ANGLE SOLAR FLUX DENSITY FIELD OF VIEW UXlSCOPES STELLAR MAGNITUDE UF LOW INTENSITY X RAY IMAGING SCOPES LOR (RENDEZVOUS) LUMINESCENCE GS MEDICAL EQUIPMENT USE LUNAR ORBITAL RENMZVWS . X RAY APPARATUS UF GLOW . . UXISCOPES NOCTILUCENCE LOW EARTH ORWTAL ENVIRONMENTS GS EMISSION RT PORTABLE ECUIPMENT USE EARTH ORBITAL ENVIRONMENTS RADICGRAPHY . LlGHT EMISSION X RAY ASTRONOMY . . LUMINESCENCE X RAY IMAGERY LOW INTENSITY X RAY IMAGING SCOPES . . . BIOLUMINESCENCE USE LlXlSCOPES . . . CATHODE GLOW . . . CATHOWLUMINESCENCE LOCAL GROUP (ASTRONOMY) . . CHEMILUMINESCENCE LOWER ATMOSPHERE . GS CELESTIAL BODIES ELECTROLUMINESCENCE SN (ALTITUDE BELOW ABOUT 50 KM) . . . GALAXIES FLUORESCENCE GS EARTH ATMOSPHERE . . . . . GALACTIC CLUSTERS LASER INDUCED FLUORESCENCE LOWER ATMOSPHERE ...... LOCAL GROUP (ASTRONOMY) . PHOSPHORESCENCE TROPOSPHERE ...... ANDROMEDA GALAXY . . . . RESONANCE FLUORESCENCE TROPOPAUSE . . RT BARRED GALAXIES . . . X RAY FLUORESCENCE RT BIOSPHERE . . . . COSMOLOGY LUNAR LUMINESCENCE CHEMOSPHERE . . . DISK GALAXIES OPTICAL RESONANCE DWARF GALAXIES HETEROSPHERE . . . PHOTOLUMINESCENCE ELLIPTICAL GALAXIES HOMOSPHERE . . . TRIBOLUMINESCENCE SOLAR NEIGHBORHOOD INTASAT SATELLITE . . . . X RAY FLUORESCENCE SPIRAL GALAXIES LACATE (EXPERIMENT) . . . . SHG€K WAVE LUMINESCENCE VIRGO GALACTIC CLUSTER LOW ALTITUDE . . . MESOMETEOROLOGY . . . SONOLUMINESCENCE MIDDLE ATMOSPHERE . . . SPACECRAFT GLOW LOCAL SCIENTIFIC SURVEY MODULE . . . THERMOLUMINESCENCE GS MODULES RT AFTERGLOWS . LOCAL SCIENTIFIC SURVEY MODULE LOWER IONOSPHERE ALKALI VAPOR LAMPS RT INSTRUMENT PACKAGES GS EARTH ATMOSPHERE BRIGHTNESS LUNAR EXPLORATION . UPPER ATMOSPHERE ELECTRON-HOLE DROPS MEASURING INSTRUMENTS . . EARTH IONOSPHERE FRAUNHOFER LINE DISCRIMINATORS . . . LOWER IONOSPHERE ~oILLUMlNATiON LOCALIZATION . . . . D REGION ILLUMINATORS USE POSITION (LOCATION) RT E REGION INCANDESCENCE LlGHT (VISIBLE RADIATION) LOCATION LRV (VEHICLE) LlGHT EMITTING DIODES USE POSITION (LOCATION) USE LUNAR ROVING VEHICLES LUMENS LUMINOSITY LOLA (SIMULATOR) LSSM LUMINOUS INTENSITY USE LUNAR ORBIT AND LANDING UF LUNAR SURFACE SCIENTIFIC MOD1JLES NOCLlLUCENT CLOUDS SIMULATORS GS LUNAR SPACECRAFT OPTICAL TRANSITION . LUNAR LANDING MODULES PLASMA RADIATION . . LUNAR MODULE STELLAR LUMINOSITY LONG DURATION EXPOSURE FAClUTY ...LSBU STOKES LAW OF RADIATION UF LDEF MANNED SPACECRAFT VISIBILITY GS ARTIFICIAL SATELUTES LUNAR MODULE SCIENTIFIC SATELLITES . . LSSM LONG WRAMEXPOWRE . . LUMINESCEW INTENSITY . . MODULES FACIUTY USE LUMINOUS INTENSITY SPACECRAFT MODULES LABORATORIES . . LANDING MODULES SPACE LABORATORIES . . . . LUNAR LANDING MODULES LUMINOSITY LONG DURATION EXPOSURE ...... LUNAR MODULE GS ELECTROMAGNETIC PROPERTIES FACILITY ..... LSSM . OPTICAL PROPERTIES SPACE PLATFORMS SOFT LANDING SPACECRAFT . . LUMINOSITY LONG WRATION EXPOSURE FAClUlY . LANDING MODULES . . . STELLAR LUMINOSITY RT SPACEBORNE EXPERIMENTS . . LUNAR LANDING MODULES RT BRIGHTNESS . . . LUNAR MODULE EMlSSlVlTY LONG DURATION SPACE FUGHT .... LSSM EMITTANCE UF EXTENDED DURATION SPACE FLIGHT SPACECRAFT COMPONENTS ILLUMINANCE GS SPACE FLIGHT . SPACECRAFT MODULES INCANDESCENCE . LONG DURATION SPACE FLIGHT . . LANDING MODULES LlGHT (VISIBLE RADIATION) RT DEEP SPACE . . . LUNAR LANDING MODULES LUMENS EXTRATERRESTRIAL ENVIRONMENTS . . . . LUNAR MODULE LUMINESCENCE mFLIGHT ..... LSSM MASS TO LlGHT RATIOS FLYBY MISSIONS RT APOLLO PROJECT PHOSPHENE INTERPLANETARY FLIGHT mSURFACES RADIANCE INTERSTELLAR TRAVEL RADIANT FLUX DENSITY MANNED MARS MISSIONS LST v!slelur, MANNED SPACE FLIGHT USE HUBBLE SPACE TELESCOPE r MISSIONS LUMINOUS FLUX DENSITY PLANETARY ENVIRONMENTS LUMINANCE USE LUMINOUS INTENSITY SPACE ADAPTATION SYNDROME SN (LIMITED TO EMISSION RATE PER UNlT AREA OF VISIBLE RADIATION) LWMINOUS INTENSITY LONG PERIOD VARIABLES GS PRESSURE SN (LIMITED TO EMISSION OR DETECTION USE MlRA VARIABLES . RADIATION PRESSURE RATE PER UNlT AREA OF VISIBLE . LUMINOUS INTENSITY RADIATION) LONG WAVE RADIATION . . LUMINANCE UF LlGHT INTENSITY GS ELECTROMAGNETIC RADIATION RATES (PER TIME) LUMINESCENT INTENSITY RADIO WAVES . FLUX DENSITY LUMINOUS FLUX DENSITY LONG WAVE RADIATION . . RADIANT FLUX DENSITY GS PRESSURE RT FAR INFRARED RADIATION . . . LUMINOUS INTENSIF RADIATION PRESSURE MONOCHROMATIC RADIATION . . . . LUMINANCE LUMINOUS INTENSITY 2. RADIATION RT BRIGHTNESS ILLUMINANCE SHORT WAVE RADIATION GLARE LUMINANCE LUNA LUNAR PROBES

LUMINOUS IN~ENSIW-(WNZ) LUNAR DUST LUNAR EXPLORATION SYSTEM FOR-(CONT) RATES (PER nMq GS PARTICLES AWLLO 5 FLIGHT . FLUX DENSITY . DUST APOUO 6 FLIGHT . . RADIANT FLUX DENSITY ..LUNARDUST AWUO 7 FLIGHT . . . LUMINOUS INTENSITY SOILS APOLLO 8 FLIGHT . . . . ILLUMINANCE . LUNAR SOIL APOLLO 9 FLIGHT . . . . LUMINANCE . . LUNAR DUST APOUO 10 FLIGHT RT BL LACERTAE OBJECTS RT MOON APOUO 11 FUGHT BRIGHTNESS SELENOLOGY APOUO 92 FLIGHT EMITTANCE APOUO 13 FLIGHT FLUX (RATE) LUNAR ECHOES APOLU) 14 FUGHT INCANDESCENCE 0s ECHOES APOUO 15 FLIGHT mINTENSITY LUNAR ECHOES AWUO 16 FLIGHT IRRADIANCE . . LUNAR RADAR ECHOES APOLLO 17 FLIGHT UGHT (VISIBLE RADIATION) RT RADIO ECHOES raSYSTEMS LUMINESCENCE SELENOLOGY MASS TO LIGHT RATIOS LUNAR FAR SIDE RADIANCY LUNAR ECUPSES RT LIBRATION SEYFERT GALAXIES GS ECLIPSES MOP SOLAR FLUX DENSITY . LUNAR ECUPSES SELEkOLOGY STELLAR MAGNITUDE AT MOON SELENOLOGY LUNAR FIGURE LUNA LUNAR PROBES RT SELENOLOGY USE LUNlK LUNAR PROBES LUNAR EFFECTS UF LUNAR PERTURBATION LUNAR FUGHT GS LUNAR VFECTS LUNAR ALBEW GS SPACE FLIGHT LUNAR GRAVITATIONAL EFFECTS GS ALBEW . LUNAR FUGHT LUNAR nDEs . . LUNAR ALBEDO . RT APOUO 5 FLIGHT RT mEFFECTS RT ABSORPTANCE APOLLO 6 FLIGHT ORBIT PERTURBATION COSMIC RAY ALBEW APOLLO 7 FLIGHT SELENOLOGY EARTH ALBEW APOLLO 8 FLIGHT OPTICAL PROPERTIES APOLLO 9 FLIGHT SURFACE PROPERTIES LUNAR ENVIRONMENT APOLLO 10 FLIGHT GS ENVIRONMENTS AWLLO 11 FLIGHT LUNAR ATMOSPHERE . EXTRATERRESTRIAL ENVIRONMENTS APOUO 12 FLIGHT . UF LUNAR IONOSPHERE . . LUNAR ENVIRONMENT APOLLO 13 FLIGHT GS ENVIRONMENTS . . . LUNAR ATMOSPHERE APOLLO 14 FLIGHT . EXTRATERRESTRIAL ENVIRONMENTS RT AEROSPACE ENVIRONMENTS APOLLO 15 FLIGHT . . LUNAR ENVIRONMENT BIOASTRONAUTICS APOLLO 16 FLIGHT . . . LUNAR ATMOSPHERE EXOBIOLOGY APOLLO 17 FLIGHT . . SATELLITE ATMOSPHERES LIFE SUPPORT SYSTEMS CIRCUMLUNAR TRAJECTORIES . . . LUNAR ATMOSPHERE MOON CISLUNAR SPACE RT MOON PLANETARY ENVIRONMENTS EARTH-MOON TRAJECTORIES PLANETARY ATMOSPHERES SELENOLOGY -s FLIGHT THERMAL ENVIRONMENTS FLYBY MISSIONS LUNAR BASES MOON-EARTH TRAJECTORIES GS SPACE BASES LUNAR EQUATOR ORBITS . LUNAR BASES GS EQUATORS RT AEPS . LUNAR EQUATOR LUNAR FLYINQ VEHICLES co ASTRONAUTICS RT INFRARED IMAGERY RT =FLIGHT VEHICLES lo BASES RADAR IMAGERY LIFTING BODIES MOON SELENOLOGY m VEHICLES ORBITING LUNAR STATIONS SPACE COLONIES LUNAR ESCAPE DEVICES LUNAR GEOLOGY STATIONS RT ESCAPE CAPSULES GS GEOLOGY ESCAPE ROCKETS . LUNAR GEOLOGY LUNAR CINEMATOGRAPHY RT GEOMORPHOLOGY USE LUNAR PHOTOGRAPHY LUNAR EVOLUTION LUNAR CORE GS EVOLUTION (DEVELOPMENT) LUNAR MARIA LUNAR COMPOSITION . LUNAR EVOLUTION LUNAR SEISMOGRAPHS GS COMPOSITION (PROPERTY) RT MOON MOON . LUNAR COMPOSITION PRE-IMBRIAN PERIOD MOONQUAKES RT LUNAR CORE SELENOLOGY PLANETARY GEOLOGY MOON PRE-IMBRIAN PERIOD PRE-IMBRIAN PERIOD LUNAR EXPLORATION REGOLITH SELENOLOGY GS EXPLORATION SEISMOLOGY . LUNAR EXPLORATION SELENOLOGY LUNAR CORE RT APOLLO LUNAR EXPERIMENT MODULE GS CORES APOLLO LUNAR SURFACE EXPERIMENl LUNAR GRAVITATION . LUNAR CORE PACKAGE GS GRAVITATION AT LUNAR COMPOSITION APOLLO PROJECT . LUNAR GRAVITATION LUNAR GEOLOGY APOLLO 5 FLIGHT RT MOON PLANETARY CORES APOLLO 6 FLIGHT PLANETARY GRAVITATION SELENOLOGY APOLLO 7 FLIGHT APOLLO 8 FLIGHT LUNAR CRATERS APOLLO 9 FLIGHT LUNAR GRAVlTATlONAL EFFECTS GS CRATERS APOLLO 10 FLIGHT GS GRAVITATIONAL EFFECTS . LUNAR CRATERS APOLLO 11 FLIGHT . LUNAR GRAVITATIONAL EFFECTS . . PTOLEMAEUS CRATER APOLLO 12 FLIGHT LUNAR EFFECTS . . TYCHO CRATER APOLLO 13 FLIGHT . LUNAR GRAVITATIONAL EFFECTS RT METEORITE CRATERS APOLLO 14 FLIGHT AT =EFFECTS MOON APOLLO 15 FLIGHT SELENOLOGY PRE-IMBRIAN PERIOD APOLLO 16 FLIGHT SELENOGRAPHY APOLLO 17 FLIGHT LUNAR IONOSPHERE SELENOLOGY EASEP USE LUNAR ATMOSPHERE EXTRATERRESTRIAL RESOURCES LUNAR CRUST LOCAL SCIENTIFIC SURVEY MODULE LUNAR LANDING GS CRUSTS MOON GS LANDING LUNAR CRUST SELENOLOGY . SPACECRAFT LANDING RT EARTH CRUST SPACE EXPLORATION . . LUNAR LANDING MOON RT APOLLO LUNAR EXPERIMENT MODULE PLANETARY CRUSTS LUNAR EXPLORATION SYSTEM FOR AWLLO APOLLO 5 FLIGHT SELENOGRAPHY UF LESA (LUNAR EXPLORATION SYSTEM) APOLLO 6 FLIGHT SELENOLOGY RT APOLLO PROJECT APOLLO 7 FLIGHT LUNAR ORBITER

LUNAR LAND~-(WNE) LUNAR LUMINESCENCE LUNAR MODULE-(CONE) APOUO 8 FLIGHT GS EMISSION APOLLO 13 FUGHT APOLLO 9 FLIGHT . LIGHT EMISSION APOLLO 14 FLIGHT APOLLO 10 FUGHT . . LUMINESCENCE APOLLO 15 FLIGHT APOUO 11 FLIGHT . . . LUNAR LUMINESCENCE APOLLO 18 FLIGHT APOLLO 12 FLIGHT RT MOON APOLLO 17 FLIGHT APOLLO 13 FLIGHT SELENOLOGY ASCENT PROPULSION SYSTEMS APOUO 14 FLIGHT APOUO 15 FUGHT LUNAR MAGNETIC FIELDS LUNAR MODULE ASCENT STAGE APOUO 16 FUGHT GS MAGNETIC flELDS RT ASCENT AWUO 17 FLIGHT . LUNAR MAGNETIC FIELDS ASCENT TRAJECTORIES CRASH UINDlNG AT MOON ROCKET ENGINES HARD LANMNG SELENOLOGY STAGE SEPARATION PLANETARY LANDING LANDING SOFT LUNAR MANTLE LUNAR MODULE 5 SURVEYOR PR(XIECT RT CRUSTS GS LUNAR SPACECRAFT EARTH MANTLE . LUNAR LANDING MODULES LUNAR MODULE LUNAR LANDING MOWLES PLANETARY MANTLES . . GS LUNAR SPACECRAFT PLANETARY STRUCTURE . . . LUNAR MODULE 5 . LUNAR LANDING MODULES REGOLITH MANNED SPACECRAFT . . LUNAR MODULE SELENOLOGY . LUNAR MODULE . APOLLO LUNAR EXPERIMENT . . LUNAR MODULE 5 . . SOFT LANDING SPACECRAFT MODULE LUNAR MAPS LANDING MODULES . . LSSM GS MAPS . . . LUNAR LANDING MODULES . . . LUNAR MODULE 5 . LUNAR MAPS LUNAR MODULE 7 RT ASTRONOMICAL MAPS . . LUNAR MODULE ...... LUNAR MODULE 5 MOWLES MOON . SPACECRAFT MODULES SELENOORAPHY RT APOLLO SPACECRAFT . . LANDING MODULES LUNAR MODULE 7 . . . LUNAR LANDING MODULES LUNAR MARIA . . . . LUNAR MODULE GS MARIA GS LUNAR SPACECRAFT LUNAR LANDING MODULES ..... LSSM LUNAR MARIA . . LUNAR MODULE SOFT LANDING SPACECRAFT RT BASALT . . LUNAR MODULE 7 . LANMNG MODULES LUNAR GEOLOGY . . . . . LUNAR LANDING MODULES LUNAR ROCKS MANNED SPACECRAFT LUNAR MODULE . . . LUNAR MODULE SELENOLOGY . . . . . APOLLO LUNAR EXPERIMENT . . LUNAR MOOULE 7 MODULE SOFT LANDING SPACECRAFT LUNAR lYWiLE LABORATORIES . LANDING MODULES . . . . LSSM UF MOLABS . . . . LUNAR MODULE 5 . . LUNAR LANDING MODULES GS LABORATORIES . . . LUNAR MODULE . . . . LUNAR MODULE 7 . LUNAR MOBILE LABORATORIES SPACECRAFT COMPONENTS . . . . LUNAR MODULE 7 SURFACE VEHICLES RT APOLLO SPACECRAFT . SPACECRAFT MODULES . LUNAR SURFACE VEHICLES . . LANDING MODULES LUNAR MOBILE LABORATORIES . . LUNAR OBSERVATORIES . . . LUNAR LANDING MODULES RT AWLLO PROJECT . . . . LUNAR MOWLE MANNED LUNAR SURFACE VEHICLES GS OBSERVATORIES LUNAR OBSERVATORIES . . . . . LSSM SELENOGRAPHY . RT APOLLO EXTENSION SYSTEM RT ASTRONOMICAL OBSERVATORIES MANEUVERABLE SPACECRAFT MANNED SPACECRAFT LUNAR MODULE UF LEM (LUNAR MODULE) LUNAR OCCULTANON REUSABLE SPACECRAFT GS OCCULTATION UNMANNED SPACECRAFT GS LUNAR SPACECRAFT . LUNAR LANDING MODULES . LUNAR OCCULTATION LUNAR MOWLE . . SOLAR ECUPSES . . RT EXOSAT SATELLITE LUNAR LANDING SlTES APOLLO LUNAR EXPERIMENT . . . MOON GS SITES MODULE . LANDING SITES . LSSM SELENOLOGY . . STELLAR OCCULTATION . . LUNAR LANDING sms . . . LUNAR MODULE 5 RT MOON . . . LUNAR MODULE 7 SELENOGRAPHY MANNED SPACECRAFT LUNAR ORBIT AND LANDING SIMULATORS . LUNAR MOWLE UF LOLA iSIMULATORI . . APOLLO LUNAR EXPERIMENT GS SIMUL~TORS ' LUNAR LAUNCH MODULE . LUNAR ORBIT AND LANDING GS LAUNCHING . . LSSM SIMULATORS . ROCKET LAUNCHING . . LUNAR MODULE 5 RT FLIGHT SIMULATORS . . . LUNAR LAUNCH . . LUNAR MODULE 7 TRAINING SIMULATORS RT APOLLO 5 FLIGHT 6 MODULES APOLLO FLIGHT . SPACECRAFT MODULES LUNAR ORBITAL RENDEZVOUS APOLLO 7 FLIGHT . LANDING MODULES UF LOR (RENDEZVOUS) 8 . APOLLO FLIGHT . . . LUNAR LANDING MODULES GS MANEUVERS APOLLO 9 FLIGHT . ORBITAL RENDEZVOUS 10 . . . . LUNAR MODULE APOLLO FLIGHT . . . . . LSSM . LUNAR ORBITAL RENDEZVOUS 1 I APOLLO FLIGHT SOFT LANDING SPACECRAFT RENDEZVOUS APOLLO 12 FLIGHT SPACE RENOEZVOUS 13 LANDING MODULES APOLLO FLIGHT . . LUNAR LANDING MODULES ORBITAL RENDEZVOUS APOLLO 14 FLIGHT . LUNAR ORBITAL RENDEZVOUS 15 . . . LUNAR MODULE APOLLO FUGHT . . . . APOLLO LUNAR EXPERIMENT RT EARTH ORBITAL RENDEZVOUS APOLLO 16 FLIGHT ORBITAL MECHANICS 17 MODULE APOLLO FLIGHT . . . . LSSM SPACECRAFT TRAJECTORIES ORBITAL LAUNCHING . . . . LUNAR MODULE 5 SATURN PROJECT . . . . LUNAR MODULE 7 LUNAR ORBITER SPACECRAFT COMPONENTS GS ARTIFICIAL SATELLITES LUNAR LlMB . SPACECRAFT MODULES . LUNAR SATELLITES RT LIBRATION . . LANDING MODULES . LUNAR ORBITER x LIMBS . . . LUNAR LANDING MODULES . . . LUNAR ORBITER 1 MOON . . . . LUNAR MODULE . . LUNAR ORBITER 2 PLANETARY LIMB . . . . . LSSM . . . LUNAR ORBITER 3 SELENOLOGY RT APOLLO SPACECRAFT . . . LUNAR ORBITER 4 APOLLO 5 FLIGHT . . . LUNAR ORBITER 5 APOLLO 6 FLIGHT LUNAR SPACECRAFT LUNAR LOGISTICS APOLLO 7 FLIGHT LUNAR SATELLITES GS LOGISTICS APOLLO R FLIGHT . LUNAR ORBITER . LUNAR LOGISTICS APOLLO 9 FLIGHT LUNAR ORBITER 1 RT LIFE SUPPORT SYSTEMS APOLLO 10 FLIGHT . . LUNAR ORBITER 2 MANNED LUNAR SURFACE VEHICLES APOLLO 11 FLIGHT . . . LUNAR ORBITER 3 MATERIALS HANDLING APOLLO 12 FLIGHT . . . LUNAR ORBITER 4 LUNAR ORBITER A

LUNAR OREITER-(WNZ) LUNAR ORBITS-(WNT) LUNAR PROBES-(CONE) . . . LUNAR ORBITER 5 TRANSFER ORBITS .... RANGER 6 LUNAR PROBE . . . . RANGER 7 LUNAR PROBE LUNAR ORBITER A LUNAR PERTURBATION .... RANGER 6 LUNAR PROBE USE LUNAR ORBITER 1 USE LUNAR EFFECTS . . . . RANGER 9 LUNAR PROBE . . . SURVEYOR LUNAR PROBES LUNAR PHASES . . . . SURVEYOR 1 LUNAR PROBE LUNAR oRBmR B . . . . SURVEYOR 2 LUNAR PROBE USE LUNAR ORBITER 2 RT MOON o~ PHASES . . . . SURVEYOR 3 LUNAR PROBE SELENOLOGY . . . . SURVEYOR 4 LUNAR PROBE LUNAR ORBITER C TERMINATOR LINES . . . . SURVEYOR 5 LUNAR PROBE USE LUNAR ORBITER 3 . . . . SURVNOR 6 LUNAR PROBE . . . . SURVEYOR 7 LUNAR PROBE LUNAR PHOTOQR*PHS AT APOLLO PROJECT LUNAR ORBITER D GS PHOTOGRAPHS USE LUNAR ORBITER 4 ATLAS ABLE 5 LAUNCH VEHICLE . LUNAR PllotumAPHS MANEWERABLE SPACECRAFT RT ASTRONOMICAL PHOTOGRAPHY PIONEER PROJECT LUNAR ORBITER E PHOTOGRAPHY USE LUNAR ORBITER 5 RANGER PROJECT RANGER PROJECT SOFT LANDING SPACECRAFT SPACEBORNE PHOTOGRAPHY LUNAR ORBITER 1 SURVEYOR PROJECT UF LUNAR ORBITER A LUNAR PHOTOGRAPHY GS ARTIFICIAL SATELLITES LUNAR PROGRAMS UF LUNAR CINEMATOGRAPHY GS PROGRAMS . LUNAR SATELLITES GS IMAGERY LUNAR PROGRAMS . . LUNAR ORBITER . LUNAR PHOTOGRAPHY . . . . LUNAR ORBITER 1 . . APOLLO PROJECT PHOTOGRAPHY . . SURVEYOR PROJECT LUNAR SPACECRAFT . LUNAR PHOTOGRAPHY . LUNAR SATELLITES RT ASTRONOMICAL PHOTOGRAPHY . . LUNAR ORBITER BLACK AND WHITE PHOTOGRAPHY LUNAR RADAR ECHOES . . . LUNAR ORBITER 1 INFRARED PHOTOGRAPHY UF LUNAR SCAlTERING MOON GS ECHOES LUNAR ORBITER 2 RANGER PROJECT . LUNAR ECHOES UF LUNAR ORBITER B SPACEBORNE PHOTOGRAPHY . . LUNAR RADAR ECHOES GS ARTIFICIAL SATELLITES . RADAR ECHOES . LUNAR SATELLITES . . LUNAR RADAR ECHOES . . LUNAR ORBITER LUNAR PROBES RT SELENOLOGY . . . LUNAR ORBITER ,2 GS LUNAR SPACECRAFT . LUNAR PROBES LUNAR SPACECRAFT LUNAR RADIATION . LUNAR SATeiuTES . . LUNlK LUNAR PROBES . . . LUNlK 2 LUNAR PROBE GS EXTRATERRESTRIAL RADIATION . . LUNAR ORBITER . LUNAR RADIATION ... LUNARORBmRZ . . . LUNlK 3 LUNAR PROBE . . . LUNlK 9 LUNAR PROBE RT ocRADlATlON . . . LUNlK 10 LUNAR PROBE SELENOLOGY LUNAR ORBITER 3 . LUNlK 11 LUNAR PROBE UF LUNAR ORBITER C . . . LUNlK 12 LUNAR PROBE LUNAR RANGEFINDING GS ARTIFICIAL SATELLITES . . LUNlK 13 LUNAR PROBE GS RANGEFINDING LUNAR SATELLITES . . . . LUNlK 14 LUNAR PROBE . LUNAR RANGEFINDING LUNAR ORBITER . . . . . LUNIK 16 LUNAR PROBE RT DISTANCE MEASURING EQUIPMENT LUNAR ORBITER 3 ...... LUNlK 17 LUNAR PROBE LASER RANGE FINDERS LUNAR SPACECRAFT . . LUNlK 19 LUNAR PROBE MEASURING INSTRUMENTS LUNAR SATELLITES . . . . LUNlK 20 LUNAR PROBE OPTICAL RANGE FINDERS LUNAR ORBITER ...... LUNlK 22 LUNAR PROBE RANGE FINDERS LUNAR ORBITER 3 ...... RANGER LUNAR PROBES . . . RANGER LUNAR LANDING LUNAR ORBITER 4 LUNAR RAYS VEHICLES SN (EXCLUDES RADIATION) UF LUNAR ORBITER D . . . RANGER 1 LUNAR PROBE GS ARTIFICIAL SATELLITES RT METEORITE CRATERS . . . RANGER 2 LUNAR PROBE MOON . LUNAR SATELLITES . . . RANGER 3 LUNAR PROBE . . LUNAR ORBITER sRAYS . . . RANGER 4 LUNAR PROBE SELENOGRAPHY . . . LUNAR ORBITER 4 . . . RANGER 5 LUNAR PROBE LUNAR SPACECRAFT . . . RANGER 6 LUNAR PROBE . LUNAR SATELLITES . . . RANGER 7 LUNAR PROBE LUNAR ROCKS . . LUNAR ORBITER . . . RANGER 8 LUNAR PROBE GS ROCKS . . . LUNAR ORBITER 4 . . . RANGER 9 LUNAR PROBE . LUNAR ROCKS . . SURVEYOR LUNAR PROBES . . KREEP LUNAR ORBITER 5 . . . SURVEYOR 1 LUNAR PROBE RT GABBRO UF LUNAR ORBITER E . . . SURVEYOR 2 LUNAR PROBE IMPACT MELTS LUNAR MARIA GS ARTIFICIAL SATELLITES . . . SURVEYOR 3 LUNAR PROBE . LUNAR SATELLITES . . . SURVEYOR 4 LUNAR PROBE PARTICLE TRACKS . . LUNAR ORBITER . . . SURVEYOR 5 LUNAR PROBE PRE-IMBRIAN PERIOD . . . LUNAR ORBITER 5 . . . SURVEYOR 6 LUNAR PROBE REGOLITH LUNAR SPACECRAFT . . . SURVEYOR 7 LUNAR PROBE SELENOGRAPHY . LUNAR SATELLITES UNMANNED SPACECRAFT SELENOLOGY . . LUNAR ORBITER . SPACE PROBES . . LUNAR ORBITER 5 . . LUNAR PROBES LUNAR ROTATION . . . LUNlK LUNAR PROBES GS ROTATING BODIES LUNAR ORBITS . . . . LUNlK 2 LUNAR PROBE . LUNAR ROTATION UF EVECTION . . . . LUNlK 3 LUNAR PROBE RT CENTER OF GRAVITY GS ORBITS . . . . LUNlK 9 LUNAR PROBE SELENOLOGY . LUNAR ORBITS . . . . LUNlK 10 LUNAR PROBE SPIN DYNAMICS RT ARTIFICIAL SATELLITES . . . . LUNlK 11 LUNAR PROBE CIRCULAR ORBITS . . . . LUNlK 12 LUNAR PROBE LUNAR ROVING VEHICLES CIRCUMLUNAR TRAJECTORIES . . . . LUNlK 13 LUNAR PROBE UF LRV (VEHICLE) CISLUNAR SPACE . . . . LUNlK 14 LUNAR PROBE GS SURFACE VEHICLES COMMAND SERVICE MODULES . . . . LUNlK 16 LUNAR PROBE . LUNAR SURFACE VEHICLES EARTH ORBITS . . . . LUNlK 17 LUNAR PROBE . . LUNAR ROVING VEHICLES EARTH-MOON TRAJECTORIES . . . . LUNlK 19 LUNAR PROBE . . . LUNOKHOD LUNAR ROVING ELLIPTICAL ORBITS . . . . LUNlK 20 LUNAR PROBE VEHICLES EQUATORIAL ORBITS . . . . LUNlK 22 LUNAR PROBE . . . MANNED LUNAR SURFACE LISSAJOUS FIGURES . . . RANGER LUNAR PROBES VEHICLES MOON . . . . RANGER LUNAR LANDING ROVING VEHICLES ORBITAL MECHANICS VEHICLES . . LUNAR ROVING VEHICLES PARKING ORBITS . . . . RANGER 1 LUNAR PROBE . . . LUNOKHOO LUNAR ROVING PERILUNES . . . . RANGER 2 LUNAR PROBE VEHICLES POLAR ORBITS . . . . RANGER 3 LUNAR PROBE RT PROVING SATELLITE ORBITS .... RANGER 4 LUNAR PROBE RESEARCH VEHICLES SPACECRAFT ORBITS . . . . RANGER 5 LUNAR PROBE nVEHICLES LUNlK 10 LUNAR PROBE

LUNAR SATE- LUNAR SPACECM-(CONT) LUNIK LUNAR PROBES-(CONT) GS ARTIFICIAL SATELLITES . . . RANGER 2 LUNAR PROBE . . LUNlK LUNAR PROBES . LUNAR SATELLITES . . . RANGER 3 LUNAR PROBE . . . LUNlK 2 LUNAR PROBE . . EXPLORER 16 SATELLITE . . . RANGER 4 LUNAR PROBE . . . LUNlK 3 LUNAR PROBE . . EXPLORER 28 SATELLITE . . . RANGER 5 LUNAR PROBE . . . LUNIK 9 LUNAR PROBE . . IMP . . . RANGER 6 LUNAR PROBE . . . LUNlK 10 LUNAR PROBE . . LUNAR ORBITER . . . RANGER 7 LUNAR PROBE . . . LUNlK 11 LUNAR PROBE . . . LUNAR ORBITER 1 . . . RANGER 6 LUNAR PROBE . . . LUNlK 12 LUNAR PROBE . . . LUNAR ORBITER 2 . . . RANGER 9 LUNAR PROBE . . . LUNlK 13 LUNAR PROBE . . . LUNAR ORBITER 3 . . SURVEYOR LUNAR PROBES . . . LUW 14 LUNAR PROBE . . . LUNAR ORBITER 4 . . . SURVEYOR 1 LUNAR PROBE . . . LUNlK 16 LUNAR PROBE . . . LUNAR ORBITER 5 . . . SURVEYOR 2 LUNAR PROBE . . . LUfflK 17 LUNAR PROBE . . ORBITING LUNAR STATIONS . . . SURVEYOR 3 LUNAR PROEE . . . LUNIK 19 LUNAR PROBE LUNAR SPACECRAFT . . . SURVEYOR 4 LUNAR PROBE . . . LUNlK 20 LUNAR PROBE . urmSI SATaLnEs . . . SURVEYOR 5 LUNAR PROBE . . . LUNlK 22 LUNAR PROBE . . EXPLORER 18 SATELLlTE . . . SURVEYOR 6 LUNAR PROBE SOVIET SPACECRAFT . . UZLORER 28 SATELLITE ... SURVEYOR 7 LUNAR PROBE . LWIK LUNAR PROBES . . IMP . LUNAR SATELLITES . . LUNIK 2 LUNAR PROBE . . LLNAR ORBITER . . EXPLORER 18 SATELUTE . . LUNIK 3 LUNAR PROBE . . . LUNAR ORBITER 1 . . EXPLORER 28 SATELLITE . . LUNIK 9 LUNAR PROBE . . . LUNAR ORBITER 2 . . IMP . . LUNlK 10 LUNAR PROBE . . . LUNAR ORBITER 3 . . LUNAR ORBITER . . LUNIK 11 LUNAR PROBE . . . LUNAR ORBITER 4 . . . LUNAR ORBITER 1 . . LUNIK 12 LUNAR PROBE . . . LUNAR ORBITER 5 . . . LUNAR ORBITER 2 . . LUNIK 13 LUNAR PROBE . . ORBITING LUNAR STATIONS . . . LUNAR ORBITER 3 . . LUNlK 14 LUNAR PROBE RT MANEUVERABLE SPACECRAFT . . . LUNAR ORBITER 4 . . LUNIK 16 LUNAR PROBE MANNED SPACECRAFT . . . LUNAR ORBITER 5 . . LUNIK 17 LUNAR PROBE PERILUNES . . ORBITING LUNAR STATIONS . . LUNIK 19 LUNAR PROBE POLAR ORBITS RT APOLLO 5 FUGHT . . LUNlK 20 LUNAR PROBE UNMANNED SPACECRAFT APOLLO 6 FUGHT . . LUNlK 22 LUNAR PROBE ARTIFICIAL SATELLITES UNMANNED SPACECRAFT LUNAR SCAlTERINa HALO ORBIT SPACE STATION . SPACE PROBES USE DIFFUSE RADIATION MANNED SPACECRAFT . . LUNAR PROBES LUNAR RADAR ECHOES RENDUVOUS SPACECRAFT- . . . LUNlK LUNAR PROBES SPACE CAPSULES . . . . LUNlK 2 LUNAR PROBE LUNAR SEISMOQRA~ mSPACECRAFT . . . . LUNlK 3 LUNAR PROBE GS MEASURING INSTRUMENTS SURVEYOR PROJECT ' . . . . LUNlK 9 LUNAR PROBE . VIBRATION METERS UNMANNED SPACECRAFT . . . . LUNlK 10 LUNAR PROBE . . SEISMOGRAPHS . . . . LUNlK 11 LUNAR PROBE . . . LUNAR SEIIMIOQRAPHS LUNAR SURFACE . . . . LUNlK 12 LUNAR PROBE RECORDING INSTRUMENTS GS SATELLITE SURFACES . . . . LUNlK 13 LUNAR PROBE . SEISMOGRAPHS . LUNAR SURFACE . . . . LUNlK 14 LUNAR PROBE . . LUNAR SEISMOGRAPHS RT SELENOLOGY . . . . LUNlK 16 LUNAR PROBE RT LUNAR GEOLOGY SURFACE LAYERS . . . . LUNlK 17 LUNAR PROBE SELENOLOGY SURFACE PROPERTIES . . . . LUNlK 19 LUNAR PROBE m SURFACES . . . . LUNlK 20 LUNAR PROBE LUNAR SHADOW . . . . LUNlK 22 LUNAR PROBE GS SHAWWS LUNAR SURFACE SCIENTIFIC MOWLeS RT LUNOKHOD LUNAR ROVING VEHICLES . LUNAR SHADOW USE LSSM U.S.S.R. SPACE PROGRAM RT ECLIPSES MOON LUNAR SURFACE VEHICLES LUNlK 2 LUNAR PROBE SELENOLOGY GS SURFACE VEHICLES GS LUNAR SPACECRAFT SOLAR ECLIPSES . LUNAR SURFACE VEHICLES . LUNAR PROBES . . LUNAR MOBIG~LABORATORIES . . LUNIK LUNAR PROBES LUNAR SOL . . LUNAR ROVING VEHICLES . . . LUNlK 2 LUNAR PROBE GS SOILS . . . LUNOKHOD LUNAR ROVING SOVIET SPACECRAFT . LUNAR SOIL VEHICLES . LUNlK LUNAR PROBES . . LUNAR DUST MANNED LUNAR SURFACE . . LUNIK 2 LUNAR PROBE RT KREEP VEHICLES UNMANNED SPACECRAFT MINERALS RT CRAWLER TRACTORS . SPACE PROBES mSURFACES . . LUNAR PROBES mVEHlCLES . . . LUNlK LUNAR PROBES WALKING MACHINES . . . . LUNIK 2 LUNAR PROBE

LUNAR SPACECRAFT LUNAR TEMPERATURE LUNlK 3 LUNAR PROBE GS LUNAR SPACECRAFf GS TEMPERATURE GS LUNAR SPACECRAFT . APOLLO SPACECRAFT . LUNAR TEMPERATURE . LUNAR PROBES RT HIGH TEMPERATURE ENVIRONMENTS . . LUNIK LUNAR PROBES . . APOLLO LUNAR EXPERIMENT-. MODULE LOW TEMPERATURE ENVIRONMENTS . . . LUNlK 3 LUNAR PROBE . LUNAR LANDING MODULES MOON SOVIET SPACECRAFT . . LUNAR MODULE SELENOLOGY . LUNlK LUNAR PROBES . . . APOLLO LUNAR EXPERIMENT . . LUNlK 3 LUNAR PROBE MODULE LUNAR TOPOGRAPHY UNMANNED SPACECRAFT . . . LSSM GS TOPOGRAPHY . SPACE PROBES . . . LUNAR MODULE 5 . LUNAR TOPOGRAPHY . . LUNAR PROBES . . . LUNAR MODULE 7 RT MOON . . . LUNlK LUNAR PROBES . LUNAR PROBES SELENOGRAPHY . . . . LUNIK 3 LUNAR PROBE . . LUNIK LUNAR PROBES SELENOLOGY . . . LUNlK 2 LUNAR PROBE SURFACE PROPERTIES LUNlK 9 LUNAR PROBE . . . LUNIK 3 LUNAR PROBE SURFACE ROUGHNESS GS LUNAR SPACECRAFT . . . LUNlK 9 LUNAR PROBE . LUNAR PROBES . . LUNlK 10 LUNAR PROBE LUNAR TRAJECTORIES . . LUNIK LUNAR PROBES . . LUNIK 11 LUNAR PROBE GS TRAJECTORIES . . . LUNlK 9 LUNAR PROBE . . LUNlK 12 LUNAR PROBE . SPACECRAFT TRAJECTORIES SOVIET SPACECRAFT LUNlK 13 LUNAR PROBE . . LUNAR TRAJECTORIES . LUNlK LUNAR PROBES LUNlK 14 LUNAR PROBE . . . CIRCUMLUNAR TRAJECTORIES LUNlK 9 LUNAR PROBE . . . LUNlK 16 LUNAR PROBE . . . EARTH-MOON TRAJECTORIES UNMANNED SPACECRAFT . . . LUNlK 17 LUNAR PROBE . . . MOON-EARTH TRAJECTORIES . SPACE PROBES . . . LUNlK 19 LUNAR PROBE RT PARKING ORBITS . . LUNAR PROBES . . LUNlK 20 LUNAR PROBE TRANSFER ORBITS . . . LUNlK LUNAR PROBES . . . LUNIK 22 LUNAR PROBE . . . . LUNIK 9 LUNAR PROBE . . RANGER LUNAR PROBES LUNlK LUNAR PROBES . . . RANGER LUNAR LANDING UF LUNA LUNAR PROBES LUNlK 10 LUNAR PROBE VEHICLES GS LUNAR SPACECRAFT GS LUNAR SPACECRAFT . . . RANGER 1 LUNAR PROBE . LUNAR PROBES LUNAR PROBES LUNIK 11 LUNAR PROBE

LUNIK 10 LUNAR PROBE-(CONT) LUNlK 19 LUNAR PROBE LYMAN SP€CTRA-(coN~) . . LUNIK LUNAR PROBES GS LUNAR SPACECRAFT . . . . LYMAN SPECTRA . . . LUNlK 10 LUNAR PROBE . LUNAR PROBES RT ATOMIC SPECTRA SOVIET SPACECRAFT . . LUNIK LUNAR PROBES ELECTRONIC SPECTRA . LUNlK LUNAR PROBES . . . LUNlK 19 LUNAR PROBE EMISSION SPECTRA . . LUNlK 10 LUNAR PROBE SOVIET SPACECRAFT H LINES UNMANNED SPACECRAFT . LUNlK LUNAR PROBES SOLAR SPECTRA . SPACE PROBES . . LUNIK 19 LUNAR PRO= SPECTRAL THEORY . . LUNAR PROBES UNMANNED SPACECRAFT ULTRAVIOLET SPECTRA . . . LUNIK LUNAR PROBES . SPACE PROBES . . . . LUNW 10 LUNAR PRC)IIE . . LUNAR PROBES LYRA CONSTELLATION . . . LUNIK LUNAR PROBES GS CONSTELLATIONS LUNIK 11 LUNAR PROBE . . . . LUNIK 19 LUNAR PROBE . LYRA CONSTrLLATlON GS LUNAR SPACECRAFT RT U.S.S.R. SPACE PROGRAM RT CELESTIAL BOMES . LUNAR PROBES CELESTIAL SPHERE . . LUNlK LUNAR PROBES LUNIK 10 LUNAR PROBE STARS . . . LUNIK 11 LUNAR PROBE GS LUNAR SPACECRAFT SOVIET SPACECRAFT . LUNAR PROBES . LUNlK LUNAR PROBES . . LUNIK LUNAR PROBES . . LUNIK 11 LUNAR PROBE . . . LUNIK 20 LUNAR PROBE UNMANNED SPACECRAFT SOVIET SPACECRAFT . SPACE PROBES . LUNlK LUNAR PROBES . . LUNAR PROBES . . LUNlK 20 LUNAR PROBE . . LUNlK LUNAR PROBES UNMANNED SPACECRAFT M REGION . . . . LUNIK 11 LUNAR PROBE . SPACE PROBES GS REGIONS . . LUNAR PROBES . M REGION . . . LUNIK LUNAR PROBES RT GEOMAGNETISM LUNIK 12 LUNAR PROBE SOLAR ATMOSPHERE GS LUNAR SPACECRAFT . . . . LUNlK 20 LUNAR PROBE SOLAR CORPUSCULAR RADIATION LUNAR PROBES . SOLAR WIND . LUNIK LUNAR PROBES LUNIK n LUNAR PROBE . . . LUNIK 12 LUNAR PROBE GS LUNAR SPACECRAFT SOVIET SPACECRAFT . LUNAR PROBES M STARS . LUNIK LUNAR PROBES . . LUNIK LUNAR PROBES GS CELESTIAL BODIES . . LUNIK 12 LUNAR PROBE . . . LUNlK 22 LUNAR PROBE . STARS UNMANNED SPACECRAFT SOVIET SPACECRAFT . . LATE STARS . SPACE PROBES . .LUNIK LUNAR PROBES . . . COOL STARS . . LUNAR PROBES . . LUNlK 22 LUNAR PROBE .... MSTARS . . . LUNIK LUNAR PROBES UNMANNED SPACECRAFT . . . . . VAN BIESBROECK STAR . . . . LUNIK 12 LUNAR PROBE . SPACE PROBES RT ASYMPTOTIC GIANT BRANCH STARS . . LUNAR PROBES FLARE STARS LUNlK 13 LUNAR PROBE . . LUNlK LUNAR PROBES GIANT STARS GS LUNAR SPACECRAFT . . . . LUNIK n LUNAR PROBE MAIN SEQUENCE STARS . LUNAR PROBES RT U.S.S.R. SPACE PROGRAM MIRA VARIABLES . . LUNIK LUNAR PROBES RED GIANT STARS . . LUNIK 13 LUNAR PROBE LUNOKHOD LUNAR ROVING VEHICLES S STARS SOVIET SPACECRAFT GS SURFACE VEHICLES SUBGIANT STARS . LUNlK LUNAR PROBES . LUNAR SURFACE VEHICLES SUPERGIANT STARS . . LUNIK 13 LUNAR PROBE . . LUNAR ROVING VEHICLES SYMBIOTIC STARS UNMANNED SPACECRAFT . . . LUNOKHOO LUNAR ROVING . SPACE PROBES VEHICLES MMRS . . LUNAR PROBES . ROVING VEHICLES USE CRATERS . . . LUNlK LUNAR PROBES . . LUNAR ROVING VEHICLES . . . . LUNIK 13 LUNAR PROBE . . . LUNOKHOD LUNAR ROVING MAWE1 GALAXIES VEHICLES GS CELESTIAL BODIES LUNlK 14 LUNAR PROBE AT LUNIK LUNAR PROBES . GALAXIES GS LUNAR SPACECRAFT U.S.S.R. SPACE PROGRAM . . MAFFEI GALAXIES . LUNAR PROBES mVEHlCLES RT NEBULAE . . LUNlK LUNAR PROBES RADIO ASTRONOMY . . . LUNIK 94 LUNAR PROBE LYMAN ALPHA RADIATION RADIO GALAXIES SOVIET SPACECRAFT GS ELECTROMAGNETIC RADIATION RADIO SOURCES (ASTRONOMY) . LUNIK LUNAR PROBES . ULTRAVIOLET RADIATION SPIRAL GALAXIES . . LUNlK 14 LUNAR PROBE . . FAR ULTRAVIOLET RADIATION UNMANNED SPACECRAFT . . . LYMAN ALPHA RADIATION MAGELLAN MISSION (ESA) . SPACE PROBES IONIZING RADIATION USE MAGELLAN ULTRAVIOLET ASTRONOMY . . LUNAR PROBES . ULTRAVIOLET RADIATION SATELLITE . . . LUNlK LUNAR PROBES . . FAR ULTRAVIOLET RADIATION LYMAN ALPHA RADIATION . . . . LUNIK 14 LUNAR PROBE . . . MAGELLAN PROJECT (NASA) RT ATOMIC SPECTRA SN (DOES NOT INCLUDE THE MAGELLAN EXTRATERRESTRIAL RADIATION LUNIK 16 LUNAR PROBE ULTRAVIOLET ASTRONOMY SATELLITE) POLARIZED ELECTROMAGNETIC GS LUNAR SPACECRAFT UF VENUS RADAR MAPPER PROJECT RADIATION . LUNAR PROBES GS PROGRAMS so RADIATION . . LUNIK LUNAR PROBES NASA PROGRAMS ULTRAVIOLET ASTRONOMY . . . . LUNI . 16 LUNAR PROBE . . NASA SPACE PROGRAMS SOVIET SPACECRAFT . . . MAGELLAN PROJECT (NASA) . LUNIK LUNAR PROBES LYMAN BETA RADIATION . PROJECTS . . LUNIK 16 LUNAR PROBE GS ELECTROMAGNETIC3 RADIATION . . MAGELLAN PROJECT (NASA) UNMANNED SPACECRAFT . ULTRAVIOLET RADIATION . SPACE PROGRAMS . SPACE PROBES . . FAR ULTRAVIOLET RADIATION . . NASA SPACE PROGRAMS . . LUNAR PROBES . . . LYMAN BETA RADIATION . . . MAGELLAN PROJECT (NASA) . . . LUNIK LUNAR PROBES IONIZING RADIATION RT MAGELLAN SPACECRAFT (NASA) . . . . LUNIK 16 LUNAR PROBE . ULTRAVIOLET RADIATION SPACE EXPLORATION . . FAR ULTRAVIOLET RADIATION SPACE MISSIONS LUNIK 17 LUNAR PROBE . . . LYMAN BETA RADlAllOM VENUS ORBITING IMAGING RADAR GS LUNAR SPACECRAFT RT ATOMIC SPECTRA (SPACECRAFT) . LUNAR PROBES EXTRATERRESTRIAL RADIATION VENUS PROBES . . LUNIK LUNAR PROBES POLARIZED ELECTROMAGNETIC VENUS SURFACE . . . LUNlK 17 LUNAR PROBE RADIATION SOVIET SPACECRAFT r RADIATION MAGELLAN SPACECRAFr (NASA) LUNlK LUNAR PROBES ULTRAVIOLET ASTRONOMY SN (DOES NOT INCLUDE THE MAGELAN . . LUNlK 17 LUNAR PROBE ULTRAVIOLET ASTRONOMY SATELLITE) UNMANNED SPACECRAFT LYMAN SPECTRA UF VENUS RADAR MAPPER . SPACE PROBES GS SPECTRA GS INTERPLANETARY SPACECRAFT . . LUNAR PROBES . RADIATION SPECTRA VENUS PROBES . . . LUNlK LUNAR PROBES . . ELECTROMAGNETIC SPECTRA . . MAGELLAN SPACECRAFT (NASA) . . . . LUNIK 17 LUNAR PROBE LINE SPECTRA UNMANNED SPACECRAFT MAGNETOSPHERE-IONOSPHERE COUPLING

MAGNETIC FIELDS MAGNETOHYDRODYNAMIC ACCELERATION MAGELLAN SPACECRMT (UASA)-(aNr) USE PLASMA ACCELERATION . SPACE PROBES GS MAGNETIC FIELDS . . VENUS PROBES . BIOMAONETISM . . . MAGELLAN SPACECRAFT (NASA) . FORCE-FREE MAGNETIC FIELDS MAGNETOHYDRODYNAMICS RT MAGELLAN PROJECT (NASA) . GEOMAGNETISM UF GEOMETRICAL HYDROMAGNETICS RADAR IMAGERY . INTERPLANETARY MAGNETIC FIELDS HYDROMAGNETICS r SPACECRAFT . INTERSTELLAR MAGNETIC FIELDS HYDROMAGNETISM SYNTHETIC APERTURE RADAR . LUNAR MAGNETIC FIELDS MAGNETOGASDYNAMICS VENUS ORBITING IMAGING RADAR . MAGNETIC CLOUDS GS FLUID MECHANICS (SPACECRAFT) . MAGNETOSTATIC FIELDS . FLUID DYNAMICS VENUS SURFACE . NONUNIFORM MAGNETIC FIELDS . . HYDRODYNAMICS . PALEOMAGNETISM . . . MAGNETOHYDRODYNAM1CS . PLANETARY MAGNmC FIELDS . HYDROMECHANICS ~ STEW MAGNETIC FIELDS HYDRODYNAMICS SATELLITE . . . SOLAR MAGNETIC REU3 UF MAGELUN MISSION (EM) . . . . . MAQNeKNWDRODYNAMICS GS ARTIFICIAL SATELUTES . TRAPPED MAGNmC FIELDS RT ALPHA PLASMA DEVICES . ESA SATELLITES BERNSTEIN ENERGY PRINCIPLE CONDUCTING FLUIDS . . MAGELLAN ULTRAVIOLET BETA FACTOR .a DYNAMICS ASTRONOMY SATELLITE CONJUGATE POINTS ELECTRIC ARCS ESA SPACECRAFT CONSTITUTIVE EQUATIONS ELECTROHYDRODYNAMICS . ESA SATELLITES CROSSED FIELDS GAS DYNAMICS DEMAGNETIZATION GAS TRANSPORT , MAGELLAN ULTRAVIOLET ASTRONOMY SATELLITE EARTH MAGNETOSPHERE HALL ACCELERATORS OBSERVATORIES ELECTRIC FIELDS HALL EFFECT . ASTRONOMICAL OBSERVATORIES ELECTROMAGNETIC ACCELERATION HARTMANN FLOW . . ASTRONOMICAL SATELLITES ELECTROMAGNETICFIELDS HARTMANN NUMBER . . . MAGELLAN ULTRAVIOLET ELECTROMAGNETISM IONIZATION ArnONOMY SATELLITE ELECTROMECHANICS MAGNETOHYDRODYNAMIC FLOW RT EXTREME ULTRAVIOLET RADIATION ELECTROKHOLE DROPS MAGNETOHYDRODYNAMIC GENERA FAR ULTRAVIOLET RADIATION FERROMAGNETIC RESONANCE MAGNETOHYDRODYNAMIC STABlLll SPACEBORNE ASTRONOMY FlELD EMISSION MAGNETOHYDRODYNAMIC WAVES FIELD STRENGTH MAGNETOHYDROSTATICS FlELD THEORY (PHYSICS) MAGNETOtONlCS MAGEWCCLOUDS ce FIELDS MAGNETOSONIC RESONANCE GS CELESTIAL BODIES nux PUMPS PINCH EFFECT GALAXIES . GEOMAGNETIC TAIL PLASMA CURRENTS MAGELLANIC CLOUDS . . HEUOS SATELLITES WMADYNAMICS RT ~DC~OUDS INTASAT SATELUTE PLASMA PHYSICS NEBULAE =KERR EFFECTS PLASMA PROPULSION ORION NEBULA LINES OF FORCE PLASMAS (PHYSICS) STAR CLUSTERS LORENTZ FORCE SPACE CHARGE STARS MAGNETIC ENERGY STORAGE SPACE MECHANICS SUPERNOVA 1987A MAGNETIC FlELD RECONNECTION SPACE PLASMAS MAGNETIZATION STELLAR ACTIVITY MAGMA MAGNETO-OPTICS STELLARATORS RT IGNEOUS ROCKS MAGNETOACTIVITY THERMONUCLEAR REACTIONS LAVA URANIUM PLASMAS REGOLITH RHYOLITE ROCKS MAGNETOION1C PLASMA MAGNETS USE PLASMAS (PHYSICS) SOILS MULTIPOLAR FIELDS NONTHERMAL RADIATION MAGNETIC CLOUDS PARTICLE ACCELERATION MAGNETOPAUSE GS MAGNETIC FIELDS PINCH EFFECT GS ENVIRONMENTS . MAGNETIC CLOUDS POLAR CUSPS . EARTH MAGNETOSPHERE PARTICLES POLARITY . . MAGNETOPAUSE , CHARGED PARTICLES RACETRACKS (PARTICLE RT CHAPMAN-FERRARO PROBLEM . . PLASMA CLOUDS ACCELERATORS) MAGNETOSHEATH . . . MAGNETIC CLOUDS RADIATION BELTS MAGNETOSPHERIC INSTABILITY RT rCLOUDS SCREW PINCH POLAR CUSPS INTERPLANETARY MAGNETIC FIELDS SCYLLA SATELLITE ATMOSPHERES INTERPLANETARY MEDIUM SELF CONSISTENT FIELDS SOLAR WIND INTERSTELLAR GAS SQUARE WELLS INTERSTELLAR MAGNETIC FIELDS SUHL EFFECT MAGNETOPLASMAS MAGNETIC FlELD CONFIGURATIONS ZEEMAN EFFECT USE PLASMAS (PHYSICS) SOLAR CORONA SOLAR WlND STELLAR MASS EJECTION MAGNETIC STARS MAGNETOSHEATH GS CELESTIAL BODIES GS ENVIRONMENTS . STARS . EARTH MAGNETOSPHERE MAGNETIC FIELD CONFIGURATIONS ..MAGNETOSHEATH RT ASTROPHYSICS . . MAGNETIC STARS RT PECULIAR STARS RT BOW WAVES ELECTROMAGNETIC FIELDS EARTH ENVIRONMENT FORCE-FREE MAGNETIC FIELDS GEOMAGNETISM HELICAL WINDINGS MAGNETOPAUSE MAGNETIC CLOUDS MAGNETIC STORMS PLASMA SHEATHS MAGNETIC FlELD RECONNECTION UF GEOMAGNETIC STORMS SHOCK FRONTS PLASMA COMPRESSION MAGNETIC SUBSTORMS GS MAGNETIC DISTURBANCES SOLAR PLANETARY INTERACTIONS PLASMA CONTROL SOLAR TERRESTRIAL INTERACTIONS PLASMA PHYSICS . MAGNETIC STORMS POLAR CUSPS STORMS WLOIDAL FLUX . MAGNETIC STORMS SPHEROMAKS DAWN CHORUS MAGNETOSPHERE-IONOSPHERE COUPLING STELLAR MAGNETIC FIELDS FORBUSH DECREASES UF IONOSPHERE-MAGNETOSPHERE NOISE STORMS COUPLING SOLAR STORMS MAGNETIC FIEU) RECONNECTION GS COURLING SOLAR TERRESTRIAL INTERACTIONS . MAGNETOSPHERE-IONOSPHERE GS MAGNETIC PROPERTIES SPREAD F MAGNETOACTIVITY COUPLING SUDDEN IONOSPHERIC DISTURBANCES RT AERONOMY MAGNETIC FlELD RECONNECTION SUDDEN STORM COMMENCEMENTS RT INTERPLANETARY MAGNETIC FIELDS ATMOSPHERIC PMSICS MAGNETIC FlELD CONFIGURATIONS COUPLED MODES MAGNETIC FIELDS EARTH IONOSPHERE MAGNETIC SUBSTORMS EARTH MAGNETOSPHERE MAGNETIC FLUX USE MAGNETIC STORMS MAGNETOSPHERE-IONOSPHERE x IONOSPHERES COUPLING MAGNETIC FlELD RECONt$ECTION SOLAR MAGNETIC FlELD MAGNETOGASDYNAMICS MAGNETOSPHERIC INSTABILITY SPACE PLASMAS USE MAGNETOHYDRODYNAMICS PLANETARY IONOSPHERES m MAGNETOSPHERES MANNED LUNAR SURFACE VEHICLES-(WNX) MAPS SN (USE OF A MORE SPECIFIC TERM IS RT CRAWLER TRACTORS GS MAPS RECOMMENDED-WhSUL T THE XRMS LUNAR LOGISTICS . ASTRONOMICAL MAPS USTW BELOW LUNAR MOBILE LABORATORIES . . PLANISPHERES RT EARTH MAGNETOSPHERE mSURFACES . LUNAR MAPS PLANETARY MAGNETOSPHERES mVEHICLES . METEOROLOGICAL CHARTS WALKING MACHINES . PHOTOMAPS MAGNETOSPHERIC ELECTRON DENSITY . RADAR CLUTTER MAPS RADAR MAPS GS DENSITY (NUMBERIVOLUME) MANNED MARS MISSIBNS . . PARTICLE DENSITY (CONCENTRATION) GS SPACE MISSIONS . RELIEF MAPS ELECTRON DENSITY . MAWED MARS MlSSlOFlS RT BONNE PROJECTION . . CADASTRAL MAPPING (CONCENTRATION) AT INTERPLANETARY FLIGHT . . . MAGNETOSPHERIC ELECTRON INTERPLANETARY SPACECRAFT CHARTS DENSrrY LONG DURATION SPACE FLIGHT COMWTER AIDED MAPPING RT ATMOSPHERIC DENSITY MANNED SPACE- COORDINATES IONOSPHERIC ELECTRON DENSITY MARS (PLANETI DATUM (ELEVATION) PLASMA DENSITY NASA SPACE PROGRAMS GEOGRAPHY RETURN TO EARTH SPACE FLIGHT mGLOBES SPACE EXPLORATION HYPSOGRAPHY MAGNETOSPHERIC ION DENSITY MAPPING GS DENSITY (NUMBERIVOLUMR MERCATOR PROJECTION . PARTI& DENSITY (CONCENTRATION) MANNED ORBITAL SPACE STATIONS NAVIGATION AIDS . . ION DENSITY (CONCENTRATION) USE SPACE STATIONS PHOTOMAPPING . . . MAGNETOSPHERK: ION DENSITY SOlL MAPPING . . . . MAGNETOSPHERIC PROTON MANNED ORBITAL TELESCOPES SURVEYS DENSITY UF MOT (ORBITAL TELESCOPES) THEMATIC MAPPING RT ATMOSPHERIC DENSITY GS TELESCOPES IONOSPHERIC ION DENSITY . MANNED ORBITAL TELESCOPES MARIA PLASMA DENSITY . . APOLLO TELESCOPE MOUNT POSITIVE IONS GS MARIA RT OAO . LUNAR MARIA RT LAVA MAGNETOSPHERIC PROTON DeNSITY MANTLE (EARTH STRUCTURE) METEORITE CRATERS GS DENSITY (NUMBERIVOLUME) USE EARTH MANTLE TOPOGRAPHY . PARTICLE DENSITY (CONCENTRATION) . . ION DENSITY (CONCENTRATION) . . . MAGNETOSPHERIC ION DENSITY MANY BBDY PfWBLEM MARINER C SPACECRAFT . . . . MAGNETOSPHERIC PROTON UF MANY PARTICLE THEORY GS INTERPLANETARY SPACECRAFT DEm RT BCS THEORY . MARINER SPACECRAFT . . . PROTON DENSITY CELESTIAL MECHANICS . . MARINER C SPACECRAFT (CONCENTRATION) ELEMENTARY EXCITATIONS UNMANNED SPACECRAFT . . . . MAGNETOSPHERIC PROTON FIELD THEORY (PHYSICS) . SPACE PROBES DENSITY FOUR BODY PROBLEM . . MARINER SPACECRAFT RT ATMOSPHERIC DENSITY GREEN'S FUNCTIONS . . . MARINER C SPACECRAFT PLASMA DENSITY HARTREE APPROXIMATION ORBITAL MECHANICS MARINER JUPITER-SATURN FLYBY ORBITS MAIN SEQUENCE STARS GS SPACE MISSIONS PARTICLE THEORY GS CELESTIAL BODIES FLYBY MISSIONS PERTURBATION STARS . . GRAND TOURS . PERTURBATION THEORY . . MAIN SEQUENCE STARS . . . MARINER JUPITER-SATURN FLYBY . . . DWARF STARS m PROBLEMS RT INTERPLANETARY FLIGHT . . . . DWARF NOVAE QUANTUM STATISTICS m MISSIONS . . . . FLARE STARS STATISTICAL MECHANICS SPACE FLIGHT . . . . RED DWARF STARS SUPERFLUIDITY . . . SUN THREE BODY PROBLEM MARINER JUPITER-URANUS FLYBY RT COLOR-MAGNITUDE DIAGRAM TROJAN ORBITS GS SPACE MISSIONS EARLY STARS TWO BODY PROBLEM . FLYBY MISSIONS F STARS . GRAND TOURS G STARS MANY PARTICLE THEORY . . . MARINER JUPITER-URANUS FLYBY GIANT STARS USE MANY BODY PROBLEM RT INTERPLANETARY FLIGHT K STARS mMlSSlONS SPACE FLIGHT LATE STARS MAPPING M STARS SN (EXCLUDES CONFORMAL MAPPING) PRE-MAIN SEQUENCE STARS UF CARTOGRAPHY MARINER MARK 2 SPACECRAFT STELLAR EVOLUTION FLUX MAPPING RT FLYBY MISSIONS STELLAR MASS GS MAPPING INTERPLANETARY FLIGHT SUBDWARF STARS . CADASTRAL MAPPING m SPACECRAFT SUBGIANT STARS . COMWTER AIDED MAPPING . ICE MAPPING MARINER PROGRAM MANEUVERS . PHOTOMAPPING GS PROGRAMS GS MANEUVERS . PLANETARY MAPPING . NASA PROGRAMS . AIRCRAFT MANEUVERS . SOlL MAPPING . . NASA SPACE PROGRAMS . EVASIVE ACTIONS THEMATIC MAPPING . . . MARINER PROGRAM . HOVERING THERMAL MAPPING . . . . MARINER VENUS-MERCURY 1973 . ORBITAL RENDEZVOUS RT ASTROGRAPHY . . . MARINER-MERCURY 1973 EARTH ORBITAL RENDEZVOUS BONNE PROJECTION . SPACE PROGRAMS . . LUNAR ORBITAL RENDEZVOUS CONTOURS . . NASA SPACE PROGRAMS . SIDESLIP DECLINATION . . . MARINER PROGRAM. . SPACECRAFT WCKlNG FIXED POINTS (MATHEMATICS) . . . . MARINER VENUS-MERCURY 1973 . SPACECRAFT MANEUVERS FUNCTIONS (MATHEMATICS) . . . . MARINER-MERCURY 1973 . . ORBITAL MANEUVERS GEOGRAPHIC APPLICATIONS PROGRAM RT AGENA B ROCKET VEHICLE AT ACROBATICS GEOGRAPHY AGENA ROCKET VEHICLES AIRCRAFT SPIN HEAT CAPACITY MAPPING MISSION ATLAS AGENA LAUNCH VEHICLES FLIGHT CONTROL HYPSOGRAPHY ATLAS LAUNCH VEHICLES LANDING MAPS CENTAUR PROJECT MANEUVERABILITY MAPSAT FLYBY MISSIONS MINOR CIRCLE TURNING FLIGHT ORTHOPHOTOGRAPHY MARS PROBES SELF MANEUVERING UNITS PHOENIX QUADRANGLE (AZ) SPACE PROBES TAKEOFF PHOTOGRAMMETRY UNMANNED SPACECRAFT TURNING FLIGHT PHOTOGRAPHY VENUS PROBES SCALE (RATIO) MANNED LUNAR SURFACE VEHICLES SPOT (FRENCH SATELLITE) MARINER R 2 SPACE PROBE GS SURFACE VEHICLES SURVEYS GS INTERPLANETARY SPACECRAFT LUNAR SURFACE VEHICLES TERRAIN ANALYSIS MARINER SPA'CE PROBES LUNAR ROVING VEHICLES TOPOGRAPHY . . MARINER R 2 SPACE PROBE . MANNED LUNAR SURFACE TOPOLOGY UNMANNED SPACECRAFT VEHICLES TRIANGULATION . SPACE PROBES MARS ATMOSPHERE

MARINER R 2 SPACE PROBE-(wNr) MARINER 2 SPACE PROBE-(CONT) MARINER 9 SPACE PROBE-(CONT) . . MARINER SPACE PROBES . . VENUS PROBES . SPACE PROBES MARINER R 2 SPACE PROBE . . . MARINER 2 SPACE PROBE . . MARINER SPACE PROBES RT ATLAS AGENA B LAUNCH VEHICLE . . . MARINER 9 SPACE PROBE . . MARS PROBES MARINER SPACE PROBES . . MARINER 9 SPACE PROBE GS INTERPLANETARY SPACECRAFT MARINER 3 SPACE PROBE . MARINER SPACE PROBES GS INTERPLANETARY SPACECRAFT . . MARINER R 2 SPACE PROBE . MARINER SPACE PROBES MARINER 10 SPACE PROBE . . MARINER 1 SPACE PROBE . . MARINER 3 SPACE PROBE GS INTERPLANETARY SPACECRAFT . . MARINER 2 SPACE PROBE . MARS PROBES . MARINER SPACE PROBES . . MARINER 3 SPACE PROBE . . MARINER 3 SPACE PROBE . . MARINER 10 SPACE PROBE MARINER 4 SPACE PROBE UNMANNED SPACECRAFT . VENUS PROBES . . MARINER 10 SPACE PROBE . . MARINER 5 SPACE PROBE . SPACE PROBES . . . MARINER 6 SPACE PROBE . . MARINER SPACE PROBES UNMANNED SPACECRAFT . MARINER 7 SPACE PROBE . . . MARINER 3 SPACE PROBE . SPACE PROBES MARINER 8 SPACE PROBE . . MARS PROBES . . MARINER SPACE PROBES . . MARINER 9 SPACE PROBE . . . MARINER 3 SPACE PROBE . . . MARINER 10 SPACE PROBE . . MARINER 10 SPACE PROBE . . VENUS PROBES . . . MARINER 10 SPACE PROBE . . MARINER 11 SPACE PROBE MARINER 4 SPACE PROBE UNMANNED SPACECRAFT GS INTERPLANETARY SPACECRAFT RT MARINER VENUS-MERCURY 1973 MARINER-MERCURY 1973 . SPACE PROBES MARINER SPACE PROBES . ' . . MARINER SPACE PROBES . . MARINER 4 SPACE PROBE . . . MARINER R 2 SPACE PROBE . MARS PROBES MARINER 11 SPACE PROBE . . . MARINER 1 SPACE PROBE . . MARINER 4 SPACE PROBE GS INTERPLANETARY SPACECRAFT . . . MARINER 2 SPACE PROBE UNMANNED SPACECRAFT . MARINER SPACE PROBES . . . MARINER 3 SPACE PROBE . SPACE PROBES . . MARINER 11 SPACE PROBE . . . MARINER 4 SPACE PROBE . . MARINER SPACE PROBES UNMANNED SPACECRAFT . . . MARINER 5 SPACE PROBE . . . MARINER 4 SPACE PROBE . SPACE PROBES . . . MARINER 6 SPACE PROBE . . MARS PROBES . . MARINER SPACE PROBES . . . MARINER 7 SPACE PROBE . . . MARINER 4 SPACE PROBE . . . MARINER 11 SPACE PROBE . . . MARINER 8 SPACE PROBE . . . MARINER 9 SPACE PROBE MARINER 5 SPACE PROBE MARINER-MERCURY 1973 . . . MARINER 10 SPACE PROBE GS INTERPLANETARY SPACECRAFT GS PROGRAMS . . . MARINER 11 SPACE PROBE . MARINER SPACE PROBES . NASA PROGRAMS . . MARINER 5 SPACE PROBE . . NASA SPACE PROGRAMS MARINER SPACECRAFT . VENUS PROBES . . . MARINER PROGRAM GS INTERPLANETARY SPACECRAFT . . MARINER 5 SPACE PROBE . . . . MARINER-MERCURY 1973 . MARINER SPACECRAFT UNMANNED SPACECRAFT . SPACE PROGRAMS . . MARINER C SPACECRAFT . SPACE PROBES . . NASA SPACE PROGRAMS . . MARINER VENUS 67 SPACECRAFT . . MARINER SPACE PROBES . .'. MARINER PROGRAM UNMANNED SPACECRAFT . . . MARINER 5 SPACE PROBE . . . . MARINER-MERCURY 1973 . SPACE PROBES . . VENUS PROBES SPACE MISSIONS . . MARINER SPACECRAFT . . . MARINER 5 SPACE PROBE . FLYBY MISSIONS . . . MARINER C SPACECRAFT RT ATLAS AGENA LAUNCH VEHICLES . . MARINER-MERCURY 1973 . . . MARINER VENUS 67 SPACECRAFT RT MARINER VENUS-MERCURY 1973 MARINER 10 SPACE PROBE MARINER 6 SPACE PROBE MARINER VENUS 67 SPACECRAFT GS INTERPLANETARY SPACECRAFT GS INTERPLANETARY SPACECRAFT . MARINER SPACE PROBES MARKARIAN GALAXIES . MARINER SPACECRAFT . . MARINER 6 SPACE PROBE GS CELESTIAL BODIES . . MARINER VENUS 67 SPACECRAFT . MARS PROBES . GALAXIES UNMANNED SPACECRAFT . . MARINER 6 SPACE PROBE . . ACTIVE GALAXIES . SPACE PROBES UNMANNED SPACECRAFT . . . MARKARIAN GALAXIES . . MARINER SPACECRAFT . SPACE PROBES RT SEYFERT GALAXIES . . . MARINER VENUS 67 SPACECRAFT . . MARINER SPACE PROBES RT VENUS PROBES . . . MARINER 6 SPACE PROBE m MARS . . MARS PROBES SN (USE OF A MORE SPECIFIC TERM IS MARINER VENUSMERCURY 1973 . . . MARINER 8 SPACE PROBE RECOMMENDED-CONSUL T THE TERMS GS PROGRAMS RT ATLAS AGENA LAUNCH VEHICLES LISTED BELOW , NASA PROGRAMS MARS 69 PROJECT RT MARS (MANNED REUSABLE . . NASA SPACE PROGRAMS SPACECRAFQ . . . MARINER PROGRAM MARINER 7 SPACE PROBE MARS (PLANET) . . . MARINER VENUSMERCURY 1973 GS INTERPLANETARY SPACECRAFT NAVIGATION AIDS . SPACE PROGRAMS . MARINER SPACE PROBES TRACKING STATIONS . . NASA SPACE PROGRAMS . . MARINER 7 SPACE PROBE . . . MARINER PROGRAM MARS PROBES MARS (PLANET) . . . . MARINER VENUSMERCURY 1973 . . MARINER 7 SPACE PROBE GS CELESTIAL BODIES SPACE MISSIONS UNMANNED SPACECRAFT PLANETS FLYBY MISSIONS . SPACE PROBES . TERRESTRIAL PLANETS . . MARINER VENUS-MERCURY 1973 . . MARINER SPACE PROBES . . . MARS (PLANET) RT MARINER 10 SPACE PROBE . . . MARINER 7 SPACE PROBE RT AMOR ASTEROID MARINER-MERCURY 1973 . . MARS PROBES APOLLO ASTEROIDS . . . MARINER 7 SPACE PROBE DEIMOS MARINER 1 SPACE PROBE RT MARS 69 PROJECT DUST STORMS GS INTERPLANETARY SPACECRAFT MANNED MARS MISSIONS . MARINER SPACE PROBES MARINER 8 SPACE PROBE r MARS . . MARINER 1 SPACE PROBE GS INTERPLANETARY SPACECRAFT MARS ATMOSPHERE . VENUS PROBES . MARINER SPACE PROBES MARS ENVIRONMENT . . MARINER 1 SPACE PROBE . . MARINER 8 SPACE PROBE MARS SURFACE UNMANNED SPACECRAFT . MARS PROBES MARS VOLCANOES . SPACE PROBES . . MARINER 8 SPACE PROBE PHOBOS . . MARINER SPACE PROBES UNMANNED SPACECRAFT PLANETARY CRATERS . . . MARINER 1 SPACE PROBE . SPACE PROBES POLAR CAPS . . VENUS PROBES . . MARINER SPACE PROBES . . . MARINER 1 SPACE PROBE . . MARINER 8 SPACE PROBE BARS ATMOSPHERE . . MARS PROBES GS ENVIRONMENTS MARINER 2 SPACE PROBE . . MARINER 8 SPACE PROBE EXTRATERRESTRIAL ENVIRONMENTS GS INTERPLANETARY SPACECRAFT RT MARS 71 PROJECT PLANETARY ENVIRONMENTS . MARINER SPACE PROBES MARS ENVIRONMENT . . MARINER 2 SPACE PROBE MARINER 9 SPACE PROBE MARS ATMOSPHERE . VENUS PROBES GS INTERPLANETARY SPACECRAFT PLANETARY ATMOSPHERES . . MARINER 2 SPACE PROBE MARINER SPACE PROBES MARS ATMOSPHERE UNMANNED SPACECRAFT . . MARINER 9 SPACE PROBE RT AEROSPACE ENVIRONMENTS . SPACE PROBES . MARS PROBES MARS (PLANET) . . MARINER SPACE PROBES . . MARINER 9 SPACE PROBE MARS VOLCANOES . . . MARINER 2 SPACE PROBE UNMANNED SPACECRAFT PLANETARY IONOSPHERES MARS CRATERS

MARS ATMOSPHERE-(CON~) MARS PROBES-(CON%) MARS 1 SPACECRAFT PLANETARY M!3EOROLOGY . . ZOND 2 SPACE PROBE GS INTERPLANETARY SPACECRAFT UNMANNED SPACECRAFT . MARS PROBES MARS CRATERS . SPACE PROBES . . MARS 1 SPACECRAFT GS CRATERS . . MARS PROBES SOVlET SPACECRAFT . PLANETARY CRATERS . . . ADVANCED RECONN ELECTRIC . MARS 1 SPACECRAFT . . MARS CRATERS SPACECRAFT UNMANNED SPACECRAFT RT CRATERING . . . MARINER 3 SPACE PROBE . SPACE PROBES EJECTA . . . MARINER 4 SPACE PROBE . . MARS PROBES IMPACT DAMAGE . . . MARINER 6 SPACE PROBE ... MARS 1 SPACECRAFT METEORITE CRATERS . . . MARINER 7 SPACE PROBE RT U.S.S.R. SPACE PROGRAM METEORITIC DAMAGE . . . MARINER 8 SPACE PROBE MARINER 9 SPACE PROBE . . . MARS 2 SPACECRAFT MARS ENVIRONMENT . . . MARS OBSERVER GS INTERPLANETARY SPACECRAFT MARS 1 SPACECRAFT GS ENVIRONMENTS . . . . NVVtS PROBES . EXTRATERRESTRIAL ENVIRONMENTS . . . MARS 2 SPACECRAFT . . MARS 2 SPACECRAFT . . PLANETARY ENVIRONMENTS . . . MARS 3 SPACECRAFT SOVlET SPACECRAFT MARS 4 SPACECRAFT . . . MARS ENVIRONMENT . . . . MARS 2 SPACECRAFT . . . . MARS ATMOSPHERE . . . MARS 5 SPACECRAFT UNMANNED SPACECRAFT RT DUST STORMS . . . MARS 6 SPACECRAFT . SPACE PROBES MARS (PLANET) . . . MARS 7 SPACECRAFT MARS PROBES . VIKING SPACECRAFT . . MARS VOLCANOES . . . . . MARS 2 SPACECRAFT . . . . VlKlNG LANDER SPACECRAFT RT U.S.S.R. SPACE PRCGRAM MARS EXCURSION MODULE . . . . VIKING LANDER 1 UF MEM (EXCURSION MODULE) . . . . . VlKlNG LANDER 2 . . . . VlKlNG ORBITER SPACECRAF MARS 3 SPACECRAFT GS MODULES GS INTERPLANETARY SPACECRAFT . . . . . VlKlNG ORBITER 1 . SPACECRAFT MODULES . MARS PROBES . . LANDING MODULES . . . . . VlKlNG ORBITER 2 . . . . . VlKlNG ORBITER 1975 . . MARS 3 SPACECRAFT . . . MARS EXCURSION MOWLE SOVIET SPACECRAFT SOFT LANDING SPACECRAFT . . . . VlKlNG 1 SPACECRAFT . . . . . VlKlNG LANDER 1 . MARS 3 SPACECRAFT . LANDING MODULES UNMANNED SPACECRAFT MARS EXCURSION MOWLE . . . . . VlKlNG ORBITER 1 ...... VlKlNG 2 SPACECRAFT . SPACE PROBES SPACECRAFT COMPONENTS . . MARS PROBES . SPACECRAFT MODULES . . . . . VlKlNG LANDER 2 . . . . . VlKlNG ORBITER 2 . . . MARS 3 SPACECRAFT . . LANDING MODULES RT U.S.S.R. SPACE PROGRAM . . . MARS UCURSlOM MODULE . . . ZOND 2 SPACE PROBE MARINER PROGRAM OUTER PLANETS EXPLORERS MARS 4 SPACECRAFT MARS QEOSCIENCE CUMATOLOQY ORBITER VENUS PROBES GS INTERPLANETARY SPACECRAFT USE MARS OBSERVER VOYAGER PROJECT . MARS PROBES ZOND SPACE PROBES ..MARS 4 SPACECRAFT MARS LANDING SOVIET SPACECRAFT GS LANDING MARS 4 MARS SATELLITES SPACECRAFT . SPACECRAFT LANDING UNMANNED SPACECRAFT GS CELESTIAL BODIES . . MARS LANDING SPACE PROBES . NATURAL SATELLITES RT AEPS MARS PROBES . MARS SATELLITES PLANETARY LANDING . . MARS 4 SPACECRAFT SOFT LANDING . . . DEIMOS RT U.S.S.R. SPACE PROGRAM VlKlNG 75 ENTRY VEHICLE . . . PHOBOS MARS 5 SPACECRAFT MARS OBSERVER MARS SURFACE GS INTERPLANETARY SPACECRAFT UF MARS GEOSCIENCE CLIMATOLOGY GS PLANETARY SURFACES . MARS PROBES ORBmR . MARS SURFACE ..MARS 5 SPACECRAFT MGM RT CANALS SOVIET SPACECRAFT GS INTERPLANETARY SPACECRAFT DUST STORMS . MARS 5 SPACECRAFT . MARS PROBES MARS (PLANW UNMANNED SPACECRAFT . . MARS OBSERVER MARS VOLCANOES . SPACE PROBES UNMANNED SPACECRAFT METEORITE CRATERS . . MARS PROBES . SPACE PROBES PLANETARY CRATERS- - . . . MARS 5 SPACECRAFT . . MARS PROBES m SURFACES RT U.S.S.R. SPACE PROGRAM . . . MARS OBSERVER TOPOGRAPHY MARS 6 SPACECRAFT MARS PROBES MARS SURFACE SAMPLES GS INTERPLANETARY SPACECRAFT GS INTERPLANETARY SPACECRAFT GS SAMPLES . MARS PROBES . MARS PROBES . MARS SURFACE SAMPLES .. MARS 6 SPACECRAFT . . ADVANCED RECONN ELECTRIC RT ASSAYING SOVIET SPACECRAFT SPACECRAFT CHEMICAL ANALYSIS . MARS 6 SPACECRAFT . . MARINER 3 SPACE PROBE SPECIMENS UNMANNED SPACECRAFT . . MARINER 4 SPACE PROBE m SURFACES . SPACE PROBES . . MARINER 6 SPACE PROBE VIKING LANDER 1 . . MARS PROBES . . MARINER 7 SPACE PROBE VIKING LANDER 2 . . MARS 6 SPACECRAFT . . MARINER 8 SPACE PROBE RT U.S.S.R. SPACE PROGRAM MARINER 9 SPACE PROBE MARS VOLCANOES MARS OBSERVER GS GEOLOGY MARS 7 SPACECRAFT . MARS 1 SPACECRAFT VOLCANOES GS INTERPLANETARY SPACCCRAFT . . MARS 2 SPACECRAFT . . MARS VOLCANOES . MARS PROBES . . MARS 3 SPACECRAFT LANDFORMS ..MARS 7 SPACECRAFT . . MARS 4 SPACECRAFT . VOLCANOES SOVIET SPACECRAFT . . MARS 5 SPACECRAFT . . MARS VOLCANOES . MARS 7 SPACECRAFT . . MARS 6 SPACECRAFT PLANETARY GEOLOGY UNMANNED SPACECRAFT . . MARS 7 SPACECRAFT . MARS VOLCANOES . SPACE PROBES . . VIKING SPACECRAFT RT BASALT . . MARS PROBES . . VlKlNG LANDER SPACECRAFT . CALDERAS . . . MARS 7 SPACECRAFT . . . . VIKING LANDER 1 CONES (VOLCANOES) RT U.S.S.R. SPACE PROGRAM . . . . VlKlNG LANDER 2 EFFUSIVES- - -- . . VlKlNG ORBITER SPACECRAFT LAVA MARS 69 PROJECT . . . VlKlNG ORBITER 1 MARS (PLANET) GS PROGRAMS . . . VlKlNG ORBITER 2 MARS ATMOSPHERE NASA PROGRAMS . . . . VlKlNG ORBITER 1975 MARS ENVIRONMENT NASA SPACE PROGRAMS . . . VlKlNG 1 SPACECRAFT MARS SURFACE MARS 69 PROJECT . . . . VlKlNG LANDER 1 MOUNTAINS PROJECTS . . . . VIKING ORBITER 1 OROGRAPHY MARS 69 PROJECT VlKlNG 2 SPACECRAFT PALEOMAGNETISM . . . . VlKlNG LANDER 2 SPACE PROGRAMS PETROLOGY NASA SPACE PROGRAMS . . . . VIKING ORBITER 2 ROUSE BELTS VIKING 75 ENTRY VEHICLE MARS 69 PROJECT . . VOLCANOLOGY RT MARINER 6 SPACE PROBE METEORITE COLLISIONS MARS 89 PROJECT-(CONZ) MED~A-(WNZ) MESONS-(WNZ) MARINER 7 SPACE PROBE . . INTERPLANETARY WST . . . . MUONS SPACE EXPLORATION . . . METEOROID DUST CLOUDS . . . . PIONS . . . . ZODIACAL DUST . . . . VECTOR MESONS MARS 71 PROJECT . . INTERPLANETARY GAS . . . . . RHO-MESONS GS PROGRAMS RT -CHANNELS . . . . . SIGMA-MESONS . NASA PRCGRAMS RT BARYONS . . NASA SPACE PROGRAMS MEM (EXCURSION IUODULE) BOSON FIELDS . . . MARS 71 PROJECT USE MARS EXCURSION MOWLE CHARGED PARTICLES . PROJECTS CORPUSCULAR RADIATION . . MARS 71 PROJECT COSMIC RAYS . SPACE PROGRAMS GS EODIES GLUONS NASA SPACE PROGRAMS C~LESTIAL . . . PLANETS LEPTONS . . . MARS 71 PROJECT MESON-NUCLEON INTERACTIONS RT MARINER 8 SPACE PROBE . . TERRESTRIAL PLANETS . . . MERCURY (MET) MUONIUM SPACE EXPLORATION RT MERCURY ATMOSPHERE POMERANCHUK THEOREM MERCURY SURFACE STRANGENESS MASS DISTRIBUTION PLANETARY CRATERS GS DISTRIBUTION (PROPERTY) MESOPAUSE . MASS DlSTRlBUTsON MERCURY AtXOSPHERE SN (ALTITUDE APPROXIMATELY 90 KM) RT AERODYNAMIC BALANCE GS ENVIRONMENTS GS EARTH ATMOSPHERE AERODYNAMIC STABILITY . EXTRATERRESTRIAL ENVIRONMENTS . MIDDLE ATMOSPHERE ANGULAR DISTRIBUTION . . PLANETARY ENVIRONMENTS . MESOSPHERE BALANCE . . . PLANETARY ATMOSPHERES . . . MESOPAUSE BALLAST (MASS) . . . . MERCURY ATMOSPHERE RT STRATOPAUSE CHARGE DISTRIBUTION RT MERCURY (PLANET) COSMOLOGY MERCURY SURFACE MESOSPHERE COUNTERBALANCES PLANETARY MmOROLOOY SN (ALTITUDE RANGE BETWEEN DENSITY WAVE MOML APPROXIMATELY 45 AND 90 KM) -DISTRIBUTION GS EARTH ATMOSPHERE FLUX DENSITY MERCURY MRl FLIGHT GS SPACE FUGHT . MIDDLE ATMOSPHERE FORCE DISTRIBUTION . MESOSPHERE GALACTIC MASS . MANNED SPACE FLIGHT . . . MERCURY FUGHTS . . . MESOPAUSE INTERGALACTIC MEDIA RT CHEMOSPHERE INTERPLANETARY MEDIUM . . . MERCURY MR-1 FW EARTH IONOSPHERE- - INTERSTELLAR MATIER. HOMOSPHERE LOADING MOMENTS MERCURY SURFACE SOLAR MESOSPHERE EXPLORER LOADS (FORCES\ GS PLANETARY SURFACES STRATOPAUSE DDMASSBhU\*' . MERCURY SURFACE MASS TO UGHT RATIOS AT EXTRATERRESTRIAL ENVIRONMENTS METEOROID CONCENTRATION MERCURY (PLANET) METAQALAXY MISSING MASS (ASTROPHYSICS) MERCURY ATMOSPHERE USE UNIVERSE MOMENT DISTRIBUTION PLANETARY CRATERS MOMENTS OF INERTIA SATELUTE SURFACES METALLIC STARS PRESSURE DISTRIBUTION SOLAR SYSTEM GS CELESTIAL BODIES SIZE DISTRIBUTION TERRESTRIAL PLANETS . STARS STAR DISTRIBUTION . . METAWC STARS STATIC LOADS MESON RESONANCE RT ABUNDANCE STRUCTURAL DESIGN CRITERIA GS PARTICLES CHEMICAL COMPOSITION VARIABLE MASS SYSTEMS . ELEMENTARY PARTICLES METAUlClTY . . BOSONS STELLAR ATMOSPHERES MASS RATIOS . . . MESONS STELLAR STRUCTURE GS RATIOS . . . . MESON RESONANCE . MASS RATIOS . . . . . X MESONS METALLlCrrY . . MASS TO LIGHT RATIOS . . FERMIONS RT ABUNDANCE . . PAYLOAD MASS RATIO . . . MESON RESONANCE CHEMICAL ANALYSIS . . PROPELLANT MASS RATIO . NUCLEAR PARTICLES CHEMICAL COMPOSITION RT METALLICITY . . BOSONS GALACTIC CLUSTERS PRESSURE RATIO . . . MESONS GALAXIES STRUCTURAL WEIGHT . . . . MESON RESONANCE GLOBULAR CLUSTERS THRUST-WEIGHT RATIO . . . . . X MESONS HYDROGEN RESONANCE INTERSTELLAR MATTER MASS SPECTRA . MESON RESONANCE MASS RATIOS GS SPECTRA . . X MESONS METALLIC STARS . MASS SPECTRA RT BARYONS METALS RT ENERGY SPECTRA HYPERONS SPECTROSCOPIC ANALYSIS MOLECULAR SPECTRA STAR CLUSTERS RADIATION SPECTRA MESONS STARS GS PARTICLES MASS TO UGHT RATIOS . ELEMENTARY PARTICLES METEOR BURSTS GS RATIOS . . BOSONS USE METEOROID SHOWERS . MASS RATIOS . . . MESONS . . MASS TO LIGHT RATIOS . . . . ETA-MESONS METEOR CRATERS RT ASTRONOMY . . . . KAONS USE CRATERS ASTROPHYSICS . . . . MESON RESONANCE GALACTIC RADIATION . . . . . X MESONS . . . . MUONS METEOR HAZARDS INDEXES (RATIOS) USE METEOROID HAZARDS LUMINOSITY . . . . PIONS LUMINOUS INTENSITY . . . . VECTOR MESONS MASS . . . . . RHO-MESONS METEOR TRAILS MASS DISTRIBUTION . . . . . SIGMA-MESONS UF METEORITIC IONIZATION MISSING MASS (ASTROPHYSICS) . . HAORONS RT BOLIDES RADIANT FLUX DENSITY . . . MESONS EARTH ATMOSPHERE STELLAR LUMINOSITY . . . . KAONS METEOROID SHOWERS STELLAR MASS . . . . MUONS METEOROIDS . . . . OMEGA-MESONS MICROMETEOROIDS . . . . VECTOR MESONS r PATHS MEDIA . . . . . RHO-MESONS PRIBRAM METEORITE SN (EXCLUDES COMMUNICATION . . . . . SIGMA-MESONS RADIO METEORS TECHNIQUES) NUCLEAR PARTICLES SCATTER PROPAGATION GS MEDIA . . BOSONS SPORADIC METEOROIDS . ANISOTROPIC MEDIA . . . MESONS r TRACKS . . ANISOTROPIC FLUIDS . . . . ETA-MESONS UPPER ATMOSPHERE ELASTIC MEDIA . . . . KAONS . INTERGALACTIC MEDIA . . . . MESON RESONANCE . INTERPLANETARY MEDIUM METEORITE COLLISIONS . . . . . X MESONS GS COLLISIONS METEORIm COMPRESSION TESTS

. METEORITE cdilllslok SCHREIBERSITE SPACECRAFT SHIELDING . RT HYPERVELOCITY IMPACT STONY METEORITES SPACECRAFT STRUCTURES METEORITIC DAMAGE TEKTITES METEOROID HAZARDS METEOROID SHOWERS SHARER CONES UF METEOR BURSTS MmoRmc DAMAGE GS CELESTIAL BODIES MmoRrnCOMPRESSON TESTS GS DAMAGE . METEOROID SHOWERS USE COMPRESSION TESTS . IMPACT DAMAGE . . AQUARID METEOROIDS MECHANICAL PROPERTIES . . MmoRmc DAMAGE . . ARIETID METEOROIDS METEORITES RT mBOMBARDMENT . . CIRIUID METEOROIDS CRATERING . . DRACONID METEOROIDS METEORITE CRA-RS EJECTA . . GEMINID METEOROIDS UF FOSSIL MmORITE CRATERS HYPERVELOCITY IMPACT . . LEONID METEOROIDS METEOROID CRATERS MARS CRATERS . . ORIONID METEOROIDS GS CRATERS METEORITE COLLISIONS . . PERSEID METEOROIDS . moRmCRATERS METEORITE CRATERS . . WADRANTID METEOROIDS RT CANADIAN SHIELD METEOROID HAZARDS . . TAURID METEOROIDS CRATERING METEOROID PROTECTION RT ASTRONOMY EJECTA PROJECTILE CRATERING BOLIDES LUNAR CRATERS COMETS LUNAR RAYS METEOR TRAILS MARIA GS DIAMONDS METEORITES MARS CRATERS . METEORITIC DIAMONDS METEOROIDS MARS SURFACE x SHOWERS METEORITES MmoRmc LWST METEORITIC DAMAGE USE MICROMETEOROIDS METEOROIDS PLANETARY CRATERS SN (LIMITED TO SOLID OBJECTS IN SPACE. PROJECTILE CRATERING METEORITIC IONIZATION MUCH SMALLER THAN AN ASTEROID PTOLEMAEUS CRATER USE ATMOSPHERIC IONIZATION AND MUCH LARGER THAN A SHATER CONES METEOR TRAILS MOLECULE) TUNGUSK METEORITE UF METEORS TYCHO CRATER METEORmC MICROSTRUCTURES GS CELESTIAL BODIES GS MICROSTRUCTURE . METEOROIDS MmoRms . METEORmC MICROSTRUCTURES . . AOUARID METEOROIDS SN (LIMITED TO METEOROIDS WHICH HAVE RT CHONDRULE . . ARIETID METEOROIDS REACHED THE SURFACE OF AN IRON METEORITES . . BOLIDES ASTEROID. NATURAL SATELLITE OR METEORITES . . . CYRILLID METEOROIDS PLANm STONY METEORITES . . DRACONID METEOROIDS UF - METEORITE COMPRESSION TESTS TEKTITES . . GEMINID METEOROIDS GS CELESTIAL BODIES WIDMANSTATTEN STRUCTURE . . LEONID METEOROIDS . METEORITES . . MICROMETEOROIDS METEOROID DUST CLOUDS . . HARLETON METEORITE METEOROID CONCENTRATION . . . ZODIACAL DUST . . IRON METEORITES GS COMPOSITION (PROPERTY) . . . . ORIONID METEOROIDS . . . AROOS METEORITE . CONCENTRATION (COMPOSITION) . . PERSEID METEOROIDS . . . ODESSA METEORITE METEOROID CONCENTRATION . . . QUADRANTID METEOROIDS . . . SIKHOTE-AUN METEORITE DENSITY (NUMBERIVOLUME) . . RADIO METEORS . . LAZARN METEORITE METEOROID CONCENTRATIOM . . SPORADIC METEOROIDS . . MICROMETEORITES RT FLUX DENSITY . . TAURID METEOROIDS . . OKHANSK METEORITE MASS DISTRIBUTION . . RT ASTEROID BELTS . . STONY METEORITES SPATIAL DISTRIBUTION ASTEROIDS . . . ACHONDRITES SPORADIC METEOROIDS . . . . BONOOC METEORITE BUMPERS . . . . KAPOETA AC~NDR~TE CHIRON NORTON COUNTY ACHONDRITE METEOROID CRATERS COMETS . . . . USE METEORITE CRATERS . . . CHONDRITES COSMIC DUST . . . . BRUDERHEIM METEORITE HYPERVELOCITY PROJECTILES .... CARBONACEOUS CHONDRITES METEOROID DUST CLOUDS INTERPLANETARY DUST . . . . . ALLENDE METEORITE GS CELESTIAL BODIES INTERPLANETARY MEDIUM . . . . . MURCHISON METEORITE . METEOROIDS METEOR TRAILS . . . . CARBONACEOUS METEORITES . . MICROMETEOROIDS METEORITES . . . . . ALAlS METEORITE . . . METEOROID WST CLOUDS METEOROID HAZARDS . . . . . COLD BOKKNELD METEORITE . . . . ZODIACAL DUST METEOROID SHOWERS . . . . . IVUNA METEORITE MEDIA MICROMETEORITES . . . . . MURRAY METEORITE . INTERPLANETARY MEDIUM NATURAL SATELLITES . . . . . ORGUEIL METEORITE . . INTERPLANETARY DUST PARTICLE TRACKS . . . . . TONK METEORITE . . . METEOROID DUST CLOUDS RADIATION METEOROID SPACECRAFT . . . . HVITTIS CHONDRITE . . . . ZODIACAL DUST SOLAR SYSTEM . . . . PANTAR CHONDRITES PARTICLES SPACE DEBRIS . . . . PRIBRAM METEORITE . DUST TEMPEL 2 COMET . . . TEKTITES COSMIC DUST TOR0 ASTEROID . . . . AUSTRALITES . INTERPLANETARY DUST VESTA ASTEROID . . . . BEDlASlTES METEOROID DUST CLOUDS . . . TUNGUSK METEORITE . . . . . ZODIACAL DUST METEOROLOGICAL ROCKETS RT BOLIDES RT =CLOUDS USE SOUNDING ROCKETS CHONDRULE EXPLORER SATELLITES COESITE TERRESTRIAL DUST BELT METEORS FOREIGN BODIES USE METEOROIDS IMPACT MELTS METEOROID HAZARDS METEORITE-CRATERS UF METEOR HAZARDS MGCO METEORITIC COMPOSITION GS HAZARDS USE MARS OBSERVER METEORITIC MICROSTRUCTURES . FLIGHT HAZARDS METEOROID SHOWERS . . METEOROID HAZARDS MICHELSON INTERFEROMETERS METEOROIDS RT METEORITE COLLISIONS GS MEASURING INSTRUMENTS METEORITIC DAMAGE INTERFEROMETERS METEOROIDS MICHELSON INTERFEROMETERS OPERATIONAL HAZARDS RT ASTROPHYSICS METEORITIC COMPOSITION PROJECTILE CRATERING RADIO ASTRONOMY GS COMPOSITION (PROPERTY) SPECTROMETERS METEORITIC COMPOSITION METEOROID PROTECTION RT CARBONACEOUS METEORITES GS PROTECTION MICRODENSITOMETERS COSMOCHEMISTRY . METEOROID PROTECTION GS MEASURING INSTRUMENTS IRON METEORITES RT BUMPERS . DENSITOMETEPS KAMACITE IMPACT DAMAGE . . MICRODENSITOMETERS METEORITES METEORITIC DAMAGE . OPTICAL MEASURING INSTRUMENTS MINERALS

MICR~~~~METERS-(WNT) M~owAvEs-(CONT) MINERALS-(CON%) . . MtCRODENSKOMElERS io RADIATION . BLOEDITE OPTICAL EQUIPMENT SATELLITE SOLAR ENERGY . BRUCITE . OPTICAL MEASURING INSTRUMENTS CONVERSION . CALCITE . . MlCRODENSKOMElERS SATELLITE SOLAR POWER STATIONS . CHROMITES RT GRAVIMETERS SCATTEROMETERS . COHENITE OPTICAL DENSITY SUBMILUMETER WAVES . CORDIERITE OPTICAL MEASUREMENT WHISTLERS . CRYOLITE PHOTOMETERS . DAWSONITE MIDDLE ATMOSPHERE . DOLOMITE lMlNERAL1 MICRMlrnoRrn GS EARTH ATMOSPHERE . EUXENITE GS CELESTIAL BODIES . MIDDLE ATMOSPHERE . FAYAUTEFELDSPARS . METEORITES . . MESOSPHERE . . MICROMETEORITES . . . MESOPAUSE . FLUORITE RT COSMIC WST . . STRATOSPHERE . FLUORSPAR HYPERVELOCITY PROJECTILES . . . OZONOSPHERE . GARNETS METEOROIDS . . . STRATOPAUSE . . TTTRIUM-ALUMINUM GARNET MlCROMETEOROlOS RT AIR . . YlTRIUM-IRON GARNET TEKTITES AIR POLLUTION . GEHLENITE ZODIACAL DUST a~ ATMOSPHERES . GRAPHITE ATMOSPHERIC CHEMISTRY . . PYROLYTIC GRAPHITE GYPSUM MICROMETEOROIDS ATMOSPHERIC CIRCULATION . UF METEORITIC DUST ATMOSPHERIC COMPOSITION . HEXAHEDRlTE MICROMETEORS CHEMOSPHERE . ILLITE ILMENITE GS CELESTIAL BODIES CLIMATOLOGY . . METEOROIDS EQUATORIAL ATMOSPHERE . IRON ORES . . MICROMETEOROIDS FREE ATMOSPHERE . . HEMATITE . . . METEOROID DUST CLOUDS HETEROSPHERE . KAMACITE . . . . ZODIACAL DUST HOMOSPHERE . KAOLINITE RT COSMIC DUST LOWER ATMOSPHERE . KREEP EXPLORER SATELLITES MIDLATINDE ATMOSPHERE . LIMONITE INTERPLANETARY DUST TR~P~PAUSE . MAGNETITE M~ORTRAILS UPPER ATMOSPHERE . MERWINITE METEORITES ZONAL FLOW (METEOROLOGY) . MICA MICROMETEORITES . . BIOTITE . . FLUOROPHLOGOPITE POYNTING-ROBERTSON EFFECT MILKY WAY GALAXY SPACE DEBRIS . . MUSCOVITE GS CELESTIAL BODIES . MONTICELLITE TERRESTRIAL DUST BELT . GALAXIES ZODIACAL LIGHT . MONTMORILLONITE . . SPIRAL GALAXIES . NEPHELINE . . . MILKY WAY GALAXY . NEPHELITE MICROMETEORS RT ORION NEBULA . OLIVINE USE MICROMETEOROIDS RADlO SOURCES (ASTRONOMY) . . FORSTERITE SOLAR NEIGHBORHOOD . PEROVSKITES MICROPHOTOMETERS STARS . PROUSTITE USE PHOTOMETERS . PYRITES MILLIMETER WAVES . PYROPHYLLITE MICROWAVE EMISSION GS ELECTROMAGNETIC RADIATION . PYROXENES GS ELECTROMAGNETIC RADIATION . RADlO WAVES . . ENSTATITE . RADlO WAVES . . SHORT WAVE RADIATION . PYRRHOTITE . . SHORT WAVE RADIATION . . . MICROWAVES . . TROILITE . . . MICROWAVES . . . . MILLIMETER WAVES . QUARTZ . . . . MICROWAVE EMISSION RT -BEAM PLASMA AMPLIFIERS . . COESlTE EMISSION C BAND . . STlSHOVlTE . MICROWAVE EMISSION CN EMISSION . SCHEELITE RT COSMIC NOISE CYCLOTRON RESONANCE DEVICES . SCHREIBERSITE DIFFRACTION RADIATION DECIMETER WAVES . SERPENTINE EXTRATERRESTRIAL RADIATION ELECTROMAGNETIC NOISE . SIDERITES EXTRATERRESTRIAL RADlO WAVES EXTRATERRESTRIAL RADlO WAVES . SPINEL LINEAR POLARIZATION EXTREMELY HIGH FREQUENCIES . SPODUMENE STELLAR RADIATION FREQUENCIES . TALC SOLAR RADlO EMISSION . TOURMALINE MICROWAVE RADIATION SUBMILLIMETER WAVES . VERMICULITE USE MICROWAVES WAVELENGTHS . WURTZITE ZINCBLENDE MICROWAVE SPECTRA MIMAS RT ALUMINUM SILICATES UF INTERSTELLAR MICROWAVE SPECTRA GS CELESTIAL BODIES ANDESITE GS SPECTRA . NATURAL SATELLITES BAUXITE RADIATION SPECTRA . . ICY SATELLITES BENEFlClATlON . . ELECTROMAGNETIC SPECTRA . . . MIMAS BIOGEOCHEMISTRY . . . RADIO SPECTRA . . SATURN SATELLITES BONE MINERAL CONTENT . . . . MICROWAVE SPECTRA . . . MIMAS BOREHOLES RT ABSORPTION SPECTRA RT SATURN (PLANET) CALCIUM SILICATES INFRARED SPECTRA CRYSTALLlTES MOLECULAR ROTATION MINERALOGY MOLECULAR SPECTRA RT CHONORULE MOLECULAR SPECTROSCOPY CRYSTALLOGRAPHY EARTH RESOURCES GEOCHEMISTRY FELSITE MICROWAVES GEOLOGY FLUOROSILICATES UF MICROWAVE RADIATION MINERAL DEPOSITS GEOLOGY GS ELECTROMAGNETIC RADIATION MINERALS IGNEOUS ROCKS RADlO WAVES PETROLOGY IMPACT MELTS . . SHORT WAVE RADIATION aPHYSlCAL SCIENCES LAVA . . . MICROWAVES LIMESTONE . . . . CENTIMETER WAVES MINERALS LUNAR SOIL . . . . DECIMETER WAVES UF APATITES MINERAL DEPOSITS . . . . MICROWAVE EMISSION ORES MINERAL EXPLORATION . . . . MILLIMETER WAVES GS MINERALS MINERALOGY RT COSMIC NOISE . AKERMANITE MONAZITE SANDS DIFFRACTION RADIATION AMPHIBOLES MULLITES ELECTROMAGNETIC NOISE ANATASE r NUTRIENTS EXTRATERRESTRIAL RADlO WAVES . ARAGONITE OBSIDIAN INFRARED RADIATION . ASBESTOS POTASSIUM SILICATES MICROWAVE FREOUENCIES . BARITE ROCKS MICROWAVE HOLOGRAPHY . BASTNASITE RUTILE MICROWAVE SOUNDING . BERYL SHALES MINOR CIRCLE TURNING FLIGHT MINUULS-(WNE) ~rsslffiMASS ~ASTROPHYSICS~(WNE) MOLECULAR ~~A-GONE) ASTROPHYSICS . . RAMAN SPECTRA SILICATES VIBRATIONAL SPECTRA SODIUM SIUCATES DARK MAlTER . . RT ABSORPTION SPECTRA SOILS DYNAMIC STABlUrY GALACTIC CLUSTERS ELECTROMAGNETIC SPECTRA UNDERGROUND ACOUSTICS SPECTRA ZEOUTES GALACTIC STRUCTURE EMlss~oN MASS DISTRIBUTION ENERGY SPECTRA MASS TO LIGHT RATIOS INFRARED SPECTRA MINOR CIRCLE TURNING NGHT VlRlAL THEOREM MASS SPECTRA GS TURNING FUGHT MICROWAVE SPECTRA . MINOR CIRCLE NRNlffi NGHT OXYGEN SPECTRA RT AIRCRAFT CONTROL m OI SOLAR SPECTRA MANEUVERS SN (USE OF A MORE SPEQnC TERM I =LIAR SPECTRA REG0MM~~l.TlERh4.5 . --- THE SWAN BANDS MINOR PLANET 1221 USTEO BELOW ULTRAVIOLET SPECTRA USE AMOR ASTEROID RT ABORTED MISSIONS VEGARPKAPLAN BANDS ASTEROID MISSIONS VISIBLE SPECTRUM ASTRO MISSIONS (STS) MINOR PLANET 2080 USE CHIRON EARTH-VENUS TRAJECTORIES EXPEDITIONS MOLIERE FORMULA FLYBY MISSIONS USE COSMIC RAY SHOWERS MIR SPACE STATION GALILEO SPACECRAFT SECONDARY COSMIC RAYS GS ARTIFICIAL SATELLITES GRAND TOURS . SPACE STATIONS HEAT CAPACITY MAPPING MISSION . . MIR SPACE STATION LANDSAT FOUOW-ON MISSIONS MONQCHROMATlC RADIATION MANNED SPACECRAFT LONG DURATION SPACE FLIGHT SN (LIMITED TO ELECTROMAGNETIC . MlR SPACE STATION MARINER JUPITER-SATURN FLYBY RADIATION) SOVIET SPACECRAFT MARINER JUPITER-URANUS FLYBY GS ELECTROMAGNETIC RADIATION . MIR SPACE STATION MISSION PLANNING . MONOCHROMATIC RADlATlON STATIONS PLANNING RT BEAMS (RADIATION) . SPACE STATIONS PROGRAMS BRlLLOUlN EFFECT . . MIR SPACE STATION PROJECT PLANNING COHERENT ELECTROMAGNETIC RT SPACE BASES PROJECTS RADIATION SPACE LABORATORIES SOLAR MAXIMUM MISSION COHERENT LIGHT SPACECRAFF DOCKING SOLAR MAXIMUM MISSION-A m FILTERS U.S.S.R. SPACE PROGRAM SPACE FLIGHT GAMMA RAYS SPACE MISSIONS INFRARED RADIATION YIRA cm STAR SPACE SHUTTLE MISSIONS IONIZING RADIATION USE OMICRON Cl3l STAR TARGETS kGwtsleLE RADIATION) ULYSSES MISSION LONG WAVE RADIATION MIRA VARIABLES VOYAGER 1977 MISSION MONOCHROMATIZATION UF LONG PERIOD VARIABLES MONOCHROMATORS GS CELESTIAL BODIES MODULES POLARIZED ELECTROMAGNETIC . STARS GS MODULES RADIATION . . LATE STARS . AIRLOCK MODULES POLARIZED LIGHT . . . COOL STARS . CHEMICAL RELEASE MODULES oc RADIATION . . . . MIRA VARIABLES . ELECTRONIC MODULES RADIO WAVES ...... OMICRON CETl STAR . . MICROMOWLES SHORT WAVE RADIATION . . VARIABLE STARS . LOCAL SCIENTIFIC SURVEY MODULE ULTRAVIOLET RADIATION . . . MIRA VARIABLES . PAYLOAD ASSIST MOWLE X RAYS . . . . OMICRON cm STAR . POWER MODULES (STS) RT ASYMPTOTIC GIANT BRANCH STARS . SERVICE MODULES MONOCnROMATORS CARBON STARS . SPACECRAFT DOCKING MODULES GS MEASURING INSTRUMENTS M STARS . SPACECRAFT MODULES . MONOCHROMATORS RED GIANT STARS . . COMMAND MODULES RADIATION SOURCES S STARS . . COMMAND SERVICE MODULES . MONOCHROMATORS STELLAR OSCILLATIONS . . LANDING MOWLES RT COMPARATORS SUPERGIANT STARS . . . LUNAR LANDING MODULES DUOCHROMATORS . . . LUNAR MODULE GONIOMETERS MIRANDA . . . . . LSSM LIGHT SOURCES GS CELESTIAL BODIES . . . MARS EXCURSION MODULE MONOCHROMATIC RADIATION . NATURAL SATELLITES . . SIM OPTICAL EQUIPMENT . . URANUS SATELLITES RT CIRCUITS OPTICAL MEASURING INSTRUMEIVTS . . . MIRANDA COMPARTMENTS PHOTOGONIOMETERS RT URANUS (PLANET) a COMPONENTS SPECTROPHOTOMETERS INSTRUMENT PACKAGES SPACE TUGS MIRRORS MOON SPARE PARTS GS MIRRORS GS CELESTIAL BODIES . CELESCOPES NATURAL SATELLITES . ETALONS MOLARS . . MOON . FRESNEL REFLECTORS USE LUNAR MOBILE LABORATORIES RT EARTH-MOON SYSTEM . MAGNETIC MIRRORS LIGHT SOURCES . TANDEM MIRRORS MOWAVITE LUNAR ATMOSPHERE PARABOLOID MIRRORS GS ROCKS LUNAR BASES ROTATING MIRRORS . IGNEOUS ROCKS LUNAR COMMUNICATION . SOLrnAS . . OBSIDIAN LUNAR COMPOSITION RT CASSEGRAIN OPTlCS . . . MOWAVIRr: LUNAR CRATERS CIRCUMSOLAR TELESCOPES RT GLASS LUNAR CRUST COLLIMATORS METEORITES LUNAR DUST HELIOSTATS SOILS LUNAR ECLIPSES OPTICAL EQUIPMENT LUNAR ENVIRONMENT OPTICAL RESONATORS MOLECULAR CLOUDS LUNAR EVOLUTION .ro OPTICS RT ASTRONOMICAL MODELS LUNAR EXPLORATION REFLECTING TELESCOPES aCLOUOS LUNAR FAR SIDE REFLECTORS COSMIC OUST LUNAR GEOLOGY SOLAR COLLECTORS HYDROGEN CLOUDS LUNAR GRAVITATION SOLAR REFLECTORS INTERSTELLAR CHEMISTRY LUNAR LANDING SITES SPECULAR REFLECTION INTERSTELLAR GAS LUNAR LIMB TELESCOPES INTERSTELLAR MASERS LUNAR LUMINESCENCE INTERSTELLAR MATTER LUNAR MAGNETIC FIELDS MISSING MASS (ASTROPHYSICSI STAR FORMATION LUNAR MAPS GS COSMOLOGY LUNAR OCCULTATION MISSING MASS (ASTROPHYSICS) MOLECULAR SPECTRA LUNAR ORBITS MASS GS SPECTRA LUNAR PHASES MISSING MASS (ASTROPHYSICS) MOLECULAR SPECTRA LUNAR PHOTOGRAPHY RT ASTRONOMY . . ELECTRONIC SPECTRA LUNAR RAYS NATURAL SATELLITES

MOON-(WNZ) wnw(C0NE) ~~snSPACE PROQRAMS-(CONE) LUNAR SHAWW SWARMING . . . . MARINER-MERCURY 1973 LUNAR SOIL TEETERING . . . MARS 69 PROJECT LUNAR TEMPERATURE TRANSIT TIME . . . MARS 71 PROJECT LUNAR TOPOGRAPHY TRANSLATIONAL MOTION . . . MERCURY PROJECT SELENOGRAPHY TUMBLING MOTION . . . NATIONAL LAUNCH VEHICLE SELENOLOGY TURBULENCE PROGRAM VELOCITY . . . NEW MOONS PROJECT . NIMBUS PROJECT WN-EARTH TRAJECTORIES VERTICAL MOTION . . VERTICAL MOTION SIMULATORS . . . OPEN PROJECT GS TRAJECTORIES PIONEER PROJECT SPACECRAFT TRAJECTORIES VIBRATION . . . . VISCOS(P( . . . PROJECT SET1 . . LUNAR TRAlECTORlES RANGER PROJECT MOON-EARTH TRAJECTORIES YAW ...... AGENA B RANGER PROGRAM RT APOUO 5 FLIGHT . . . . ROVER PROJECT APOLLO 6 FLIGHT MOTION EWATtONS . . . . . SAlL PROJECT APOUO 7 FLIGHT USE EQUATIONS OF MOTION . . . . SATURN PROJECT APOLLO 8 FLIGHT . . . SCOUT PROJECT APOLLO 10 FLIGHT MOVEMENT USE MOTION . . . SKYLAB PROGRAM APOLLO 11 FLIGHT . . STARPROBE MISSION APOLLO 12 FLIGHT . . . . SURVEYOR PROJECT APOLLO 13 FLIGHT MRKOS COMET . . . SYNCHRONOUS COMMUNICATIONS APOLLO 14 FLIGHT GS CELESTIAL BODIES SATELLITE PROJ APOLLO 15 FLIGHT COMETS . . TEKTITE PROJECT APOLLO 16 FLIGHT MRKOS COMET ...... TlROS PROJECT APOLLO 17 FLIGHT . TITAN PROJECT CIRCUMLUNAR TRAJECTORIES . . . MULTISPECTRAL TRACKING TELESCOPES VANGUARD PROJECT EARTH-MOON TRAJECTORIES . . . GS TELESCOPES VIKING MARS PROGRAM GOMlARD TRAJECTORY . . . . SPECTROSCOPIC TELESCOPES VOYAGER PROJECT DETERMINATION SYSTEM . . . . . MULTISPECTRAL TRACKING SPACE PROGRAMS LUNAR FLIGHT . TELESCOPES NASA SPACE PROGRAMS MASS DRIVERS (PAYLOAD DELIVERY) . . RT oPnCAL MEASURING INSTRUMENTS APOLLO APPLICATIONS PROGRAM ORBITAL MECHANICS . . . OPTICAL TRACKING . . . APOLLO PROJECT REENTRY TRAJECTORIES TRACKING (POSITION) ROUND TRIP TRAJECTORIES . . . BIOASTRONAUTICAL ORBITAL SPACE SYSTEM TRANSFER ORBITS MURCHlSON METEORITE . . . CENTAUR PROJECT GS CELESTIAL BODIES . . . EARTH 8 OCEAN PHYSICS MOONQUAKES . METEORITES APPLICATIONS PROGRAM GS SEISMOLOGY . . STONY METEORITES . . . EARTH RESOURCES PROGRAM . MOONQUAKES . . . CHONDRITES .... EARTH RESOURCES SURVEY RT LUNAR GEOLOGY . . . . CARBONACEOUS CHONDRITES PROGRAM LUNAR TIDES . . . . . MURCHISON METEORITE . . . . . SEASAT PROGRAM PLANETARY QUAKES . . . ECHO PROJECT SELENOLOGY MURRAY METEORITE . . . GALILEO PROJECT GS CELESTIAL BODIES . . . GEMINI PROJECT MOREHOUSE COMET METEORITES . . . HELIOS PROJECT GS CELESTIAL BODIES . . STONY METEORITES . . . JUPITER PROJECT COMETS . . CHONDRITES . . . MAGELLAN PROJECT (NASA) MOREHOUSE COMET ...... CARBONACEOUS METEORITES . . . MARINER PROGRAM . . . . . MURRAY Mmmm . . . . MARINER VENUSMERCURY 1973 MORNING . . . . MARINER-MERCURY 1973 RT DAYTIME . . . MARS 69 PROJECT SUNRISE . . . MARS 71 PROJECT . . . MERCURY PROJECT MOSS (SPACE STATIONS) . . . NATIONAL LAUNCH VEHICLE USE SPACE STATIONS PROGRAM . . . NEW MOONS PROJECT MOT (ORBITAL TELESCOPES) NAKED SlNGUURmES . . . NIMBUS PROJECT USE MANNED ORBITAL TELESCOPES GS ANALYSIS (MATHEMATICS) . . . OPEN PROJECT . COMPLEX VARIABLES . . . PIONEER PROJECT rn MOTKIN . . SINGULARITY (MATHEMATICS) . . . PROJECT SET1 SN (USE OF A MORE SPECIFIC TERM IS . . . NAKED SlNGUURmES . . . RANGER PROJECT RECOMMENDEPCOONSUL T THE TERMS RT ASTROPHYSICS . . . . AGENA B RANGER PROGRAM LISTED BELOW) BLACK HOLES (ASTRONOMY) . . . ROVER PROJECT UF MOVEMENT COSMOLOGY . . . SAlL PROJECT RT ACCELERATION (PHYSICS) DEGENERATE MATTER . . SATURN PROJECT ATTITUDE (INCLINATION) GRAVITATIONAL COLLAPSE . . . SCOUT PROJECT BROWNIAN MOVEMENTS POINTS (MATHEMATICS) . . SKYLAB PROGRAM DISPLACEMENT RELATIVITY . . . STARPROBE MISSION DOMAIN WALL SPACE-TIME FUNCTIONS . . . SURVEYOR PROJECT GLIDING THEORETICAL PHYSICS . . . SYNCHRONOUS COMMUNICATIONS GYRATION WHITE HOLES (ASTRONOMY) SATELLITE PROJ HARMONIC MOTION . . . TEKTITE PROJECT HEAD MOVEMENT NASA SPACE PROGRAMS . . TlROS PROJECT HEAVING GS PROGRAMS TITAN PROJECT HIGH ACCELERATION . NASA PROGRAMS . . . VANGUARD PROJECT IMMOBILIZATION . . NASA SPACE PROGRAMS . . . VIKING MARS PROGRAM INERTIA . . . APOLLO APPLICATIONS PROGRAM . . . VOYAGER PROJECT ION MOTION . . . APOLLO PROJECT RT MANNED MARS MISSIONS IONIC MOBILITY . . . BIOASTRONAUTICAL ORBITAL KINEMATICS SPACE SYSTEM NATURAL SATELLITES LIBRATION . . . CENTAUR PROJECT SN (EXCLUDES PLANETS) MOMENTUM . . EARTH & OCEAN PHYSICS UF PLANETARY SATELLITES NUTATION APPLICATIONS PROGRAM GS CELESTIAL BODIES ORBITS . . . EARTH RESOURCES PROGRAM NATURAL SATELLITES OSCILLATIONS . . . . EARTH RESOURCES SURVEY . . CHARON OSCILLATORS PROGRAM . . ICY SATELLITES PARTICLE MOTION . . . . . SEASAT PROGRAM . . ARlEL PARTICLE TRAJECTORIES . . . ECHO PROJECT . . CALLISTO PITCH (INCLINATION) . . . GALILEO PROJECT . . DlONE ROTATION GEMINI PROJECT ENCELADUS SACCADIC EYE MOVEMENTS . . HELIOS PROJECT EUROPA SOLAR ORBITS . . JUPITER PROJECT GANYMEDE SPACECRAFT MOTION . . . MAGELLAN PROJECT (NASA) . . . HYPERION SPACECRAFT TRAJECTORIES . . . MARINER PROGRAM . . IAPETUS STELLAR MOTIONS . . . . MARINER VENUS-MERCURY 1973 . . . MIMAS NEAR INFRARED RADIATION

NATURAL SITE~CONJ.) NEEULAE-(WNZ) NEUTRON DETECTORS . . . RHEA (ASTRONOMY) SUPERNOVAE USE NEUTRON COUNTERS . . . TETHYS . . . TITANIA NEMESIS (STAR) NEUTRON FLUX . . JUPITER SATELUTES UF SOLAR COMPANION STAR USE FLUX (RATE) . . . AMALTHEA GS CELESTIAL BODIES . . . GAULEAN SATELLITES . STARS NEUTRON FLUX DENSITY . . . . CALUSTO . . WUBLE STARS SN (LIMITED TO NEUTRON EMISSION OR . . . . EUROPA . . . BINARY STARS DETECTION RATE PER UNIT AREA) . . . . GANYMEDE . . . . COMPANION STARS GS RATES (PER TIME) ....lo ..... NEYESIE)(8TM). . . FLUX DENSITY . . MARS SATELLITES RT DWARF STARS . . RADIANT nux DENSITY . . . DElMOS MTlNCTlON . . . PARTICLE FLUX DENSITY . . . PHOBOS &ITCLOUD . . . . NEUTRON FLUX DENSlTY ..MOON SOLAR NEIGHeORHOOD RT HIGH FLUX ISOTOPE REACTORS . . SATURN SArrUlTES STELLAR ORBITS IRRADIANCE . . . DlONE NUCLEAR FISSION . . . ENCELADUS RADIANCE . . . HYPERION NEPTUNE (PLANET) RADIANCY . . . IAPETUS GS CELESTIAL BODIES RADIATION SHIELDING . . . JANUS . PLANETS SOLAR NEUTRONS . . . MIMAS . . GAS GIANT PLANETS . . . PHOEBE . . . NEPTUNE (PLANET) NEUTRON SPECTRA . . . RHEA (ASTRONOMY) RT NEPTUNE ATMOSPHERE GS SPECTRA . . . TETHYS TRITON ENERGY SPECTRA . . . TITAN . . NEUTRON SPECTRA . . TRITON NEPTUNE ATUOSPHERE . . URANUS SATELLITES GS ENVIRONMENTS NEUTRON STARS . . . ARIEL . EXTRATERRESTRIAL ENVIRONMENTS SN (EXCLUDES TRACKS OF PARTICLES . . . MIRANDA . . PLANETARY ENVIRONMENTS EMANATING FROM A NUCLEAR . . . OBERON . . . PLANETARY ATMOSPHERES COLLISION) . . . TITANIA . . . . NEPTUNE ATMOSPHERE GS CELESTIAL BODIES UMBRIEL . . . RT AEROSPACE ENVIRONMENTS . STARS RT ARTIFICIAL SATELLITES m ATMOSPHERES . . NEUTRON STARS CYRILLID METEOROIDS GAS GIANT PLANETS . . . PULSARS EARTH-MOON SYSTEM HYDROGEN RT DEGENERATE MATTER METEOROIDS METHANE GRAVITATIONAL LENSES PLANETS NEPTUNE (PLANET) NEUTRAL CURRENTS ROCHE LIMIT PLANETARY IONOSPHERES SUPERNOVA REMNANTS SATELLITE ATMOSPHERES TRITON X RAY BINARIES SATELLITE SURFACES X RAY STARS sSATELLlTES SATURN RINGS NEUTRAL ATOMS NEUTRON TRANSMUTATION SOLAR SYSTEM GS ATOMS USE NUCLEAR REACTIONS TEKTITES . NEUTRAL ATOW URANUS RINGS RT ATOMIC BEAMS CHARGE DISTRIBUTION NEUTRONS m ELEMENTS GS PARTICLES NEAR INFRARED RADIATION H I REGIONS . ELEMENTARY PARTICLES SN (0.75 TO 3 MICRONS) NEUTRAL BEAMS FERMIONS GS ELECTROMAGNEnC RADIATION . . . NEUTRONS . INFRARED RADIATION . . NEIR INFRARED RADIATION NEUTRAL a*su . . . . COLD NEUTRONS . . GS EXTRATERRESTRIAL MATTER FAST NEUTRONS RT FAR INFRARED RADIATION . . . . COSMIC GASES PHOTONEUTRONS INFRARED PHOTOMETRY . . . . . INTERSTELLAR GAS SOLAR NEUTRONS LIGHT (VISIBLE RADIATION) ...... NEUTRAL GASES . . . THERMAL NEUTRONS m RADIATION . INTERSTELLAR MATTER NEUTRAL PARTICLES RADlATlVE HEAT TRANSFER . . INTERSTELLAR GAS RADIATIVE TRANSFER . . . . NEUTRONS NEUTRAL GASES TERRESTRIAL RADIATION ...... COLD NEUTRONS THERMAL RADIATION GASES . . . FAST NEUTRONS . RAREFIED GASES . . . PHOTONEUTRONS . . COSMIC GASES . . . SOLAR NEUTRONS NEAR ULTRAVIOLET RADIATION . . . INTERSTELLAR GAS . . . THERMAL NEUTRONS SN (2000 TO 4000 ANGSTROMS) . . . . NEUTRAL GASES RT BARYONS GS ELECTROMAGNETIC RADIATION RT H l REGIONS CHARGED PARTICLES . ULTRAVIOLET RADIATION INTERPLANETARY GAS CORPUSCULAR RADIATION . . NEAR ULTRAVIOLET RADIATION COSMIC RAYS IONIZING RADIATION NEUTRINOS NEUTRON EMISSION . ULTRAVIOLET RADIATION GS PARTICLES NUCLEAR RADIATION . . NEAR ULTRAVIOLET RADIATION ELEMENTARY PARTICLES NUCLEI (NUCLEAR PHYSICS) RT FAR ULTRAVIOLET RADIATION . . FERMIONS NUCLEON POTENTIAL LIGHT (VISIBLE RADIATION) . . . LEPTONS NUCLEONS m RADIATION . . . . NEUTRINOS RADIATION EFFECTS . . . . . SOLAR NEUTRINOS RADIATION SHIELDING NEBULAE RT ANTINEUTRINOS GS CELESTIAL BODIES DARK MATTER NIGHT . NEBULAE GRAVlTlNOS RT DARKENING . . CASSIOPEIA A NEUTRAL CURRENTS DARKNESS . . CRAB NEBUU DAYTIME . . GUM NEBULA NEUTRON COUNTERS DIURNAL VARIATIONS . . H I REGIONS UF NEUTRON DETECTORS EVENING . . H II REGIONS GS MEASURING INSTRUMENTS , SHADOWS . . HERBIG-HARO OBJECTS . COUNTERS SKY BRIGHTNESS . . ORION NEBULA . . RADIATION COUNTERS TWILIGHT GLOW PLANETARY NEBULAE . . . NEUTRON COUNTERS REFLECTION- - NEBULAE . . . . NEUTRON SPECTROMETERS NlGHT AIRGLOW RT GALAXIES . RADIATION MEASURING INSTRUMENTS USE NIGHTGLOW INTERSTELLAR MATTER . . RADIATION COUNTERS IRREGULAR GALAXIES . . . NEUTRON COUNTERS MAFFEI GALAXIES . . . . NEUTRON SPECTROMETERS NIGHT E LAYER MAGELLANIC CLOUDS RT DOSIMETERS USE E REGION NORTH POLAR SPUR (ASTRONOMY) GEIGER COUNTERS NIGHT SKY OPHlUCHl CLOUDS IONIZATION CHAMBERS OPlK THEORY PROPORTIONAL COUNTERS NlGHT F LAYER SOLAR CORONA SCINTILLATION COUNTERS USE F REGION STAR FORMATION SPARK CHAMBERS NIGHT SKY NUCLEI (NUCLEAR PHYSICS)

NIGHT SKY NORTH POLAR SPUR (ASTRONOMY)-(CONE) NUCLEAR PAR~LES-(CONZ) UF NIGHT E LAYER . . . NORTH POLAR SPUR . . PHOTOELECTRONS NIGHT F LAYER (ASTRONOMY) RT CORPUSCULAR RADIATION GS SKY RT NEBULAE COSMIC RAYS . NffiHT SKY SUPERNOVA REMNANTS ELEMENTARY PARTICLES RT AIRGLOW X RAY SPECTRA FISSION PRODUCTS AURORAS GAMMA RAY BURSTS GEGENSCHEIN NORTHERN SKY NEUTRON CROSS SECTIONS NIGHTGLOW RT ASTRONOMICAL CATALOGS NEUTRON DISTRIBUTION SKY BRIGHTNESS ASTRONOMICAL COORDINATES NEUTRON SCATI'ERING TWILIGHT GLOW ASTRONOMICAL OBSERVATORIES NUCLEON POTENTIAL ZODlACAL UGHT NORTHERN HEMISPHERE NUCLEON-NUCLEON SCATTERING SKY SURVEYS (ASTRONOMY) PARTICLE ACCELERATORS SOUTHERN SKY PARTICLE TRACKS PHOTONEUTRONS UF NIGHT AIRGLOW PI-ELECTRONS GS ATMOSPHERIC RADIATION MORTON COUNTY ACHONDRITE POSITRON ANNIHILATION SKY RADIA 'ION GS CELESTIAL BODIES . PROTON RESONANCE AIRGLOW . METEORITES . . PROTONS . . . NIQHTGLOW . . STONY METEORITES ELECTROMAGNETIC RADIATION . . . ACHONDRITES . LIGHT (VISIBLE RADIATION) . . . . NORTON COUNTY ACHONDRITE NUCLEAR REACTIONS . . SKY RADIATION UF NEUTRON TRANSMUTATION e NOVA GS NUCLEAR REACTIONS SN (USE OF A MORE SPECIFIC TERM IS . NUCLEAR FISSION REWMMENDEP-CONSULT WE TERMS . NUCLEAR INTERACTIONS NIGHT SKY LISTED BELOW) . . NUCLEAR CAPTURE RADIO AURORAS RT NOVA LAUNCH VEHICLES . . . ELECTRON CAPTURE SKY BRIGHTNESS NOVAE . . SPIN-ORBIT INTERACTIONS . . . ELECTRON CAPTURE NOCnLUCENcE NOVAE . . WEAK INTERACTIONS (FIELD USE LUMINESCENCE GS CELESTIAL BODIES THEORY) . STARS . NUCLEAR S~ATTERING NEUTRON SCATTERING NOCnLUCENT CLOUDS . . VARIABLE STARS . . RESONANCE SCATTERING GS CLOUDS (METEOROLOGY) . . . NOVAE . . . NOCnLUCENT CLOUDS . . . . DWARF NOVAE . NUCLEAR TRANSFORMATIONS RT LUMINESCENCE . . . . HERCULES NOVA . . TRANSMUTATION AT CATACLYSMIC VARIABLES . PHOTONUCLEAR REACTIONS mNOVA . PROTON SCAlTERING NOWEQUILIBRIUM RADIATION SHOCK WAVES . PROTON-PROTON REACTIONS GS ELECTROMAGNETIC RADIATION STEUAR MASS . RADIOACTIVE DECAY . NONEQUlLlBRlUM RADIATION STELLAR MASS EJECTION . . ALPHA DECAY RT NONTHERMAL RADIATION SUPERNOVAE . . NEUTRON EMISSION SHOCK WAVE PROPAGATION SYMBIOTIC STARS . SPALLATION . THERMONUCLEAR REACTIONS NONGRAY ATMOSPHERES NUCLEAR FUSION . . NUCLEAR FUSION RT =ATMOSPHERES UF NUCLEOSYNTHESIS . . . CONTROLLED FUSION BLACK BODY RADIATION GS NUCLEAR REACTIONS RT BRAGG CURVE EMlSSlVlTY . THERMONUCLEAR REACTIONS COMPTON EFFECT GRAY GAS . . NUCLEAR FUSION CRITICAL EXPERIMENTS PLANETARY ATMOSPHERES . . . CONTROLLED FUSION CRITICAL MASS RT COLLlSlONAL PLASMAS ELECTRON SCATTERING NONGRAY GAS DEGENERATE MATTER EMISSION GS GASES DENSE PLASMAS HALF LIFE . NONGRAY GAS DEUTERON IRRADIATION HlGH ENERGY INTERACTIONS RT mATMOSPHERES FUSION INHOUR EQUATION BLACK BODY RADIATION FUSION REACTORS mINTERACTIONS EMISSIVITY FUSION WEAPONS INTERNAL CONVERSION HEAT TRANSFER FUSION-FISSION HYBRID REACTORS PAIR PRODUCTION SPECTRAL EMISSION HlGH ENERGY INTERACTIONS PARTICLE INTERACTIONS THERMAL RADIATION IRRADIATION PARTICLE PRODUCTION THERMODYNAMICS MAGNETIC MIRRORS PHOTONEUTRONS MIRROR FUSION POISONING (REACTION INHIBITION) POMERONS NONRELATlVlSnC ELECTRONS -NUCLEAR ENERGY RADIATION ABSORPTION USE ELECTRONS PLASMA FOCUS RAILGUN ACCELERATORS RADIOGENIC MATERIALS STAR FORMATION a REACTION NONTHERMAL EMISSION REACTION KINETICS USE NONTHERMAL RADIATION STELLAR INTERIORS STELLAR PHYSICS REACTIVITY mSYNTHESlS SOLAR NEUTRINOS NONTHERMAL RADIATION TOKAMAK DEVICES STRONG INTERACTIONS (FIELD UF NONTHERMAL EMISSION THEORY) GS ELECTROMAGNETIC RADIATION . NONTHERMAL RADIATION NUCLEAR PARTICLES . . CYCLOTRON RADIATION GS PARTICLES . . . ION CYCLOTRON RADIATION . NUCLEAR PARTICLES NUCLEI (NUCLEAR PHYSICS) . . SYNCHROTRON RADIATION . . ANTIPARTICLES GS PARTICLES RT GALACTIC RADIATION . . . ANTINEUTRINOS . CHARGED PARTICLES ENERGETIC PARTICLES MAGNETIC FIELDS . . . ANTINUCLEONS . . ANTIPROTONS NONEQUILIBRIUM RADIATION ...... NUCLEI (NUCLEAR PHYSICS) mRADIATION . . . . POSITRONS . . . . EVEN-EVEN NUCLEI RADlO WAVES . . BETA PARTICLES . . . . HEAVY NUCLEI THERMAL RADIATION . . BOSONS . . . . HYPERNUCLEI . . . ALPHA PARTICLES . . . . ODD-EVEN NUCLEI . . . MESONS . . . . ODD-ODD NUCLEI NOON . . . . ETA-MESONS RT ATOMS AT DAYTIME . . . . KAONS CORPUSCULAR RADIATION ZENITH . . . . MESON RESONANCE COSMIC RAYS . . . . . X MESONS ELEMENTARY PARTICLES NORTH POLAR SPUR (ASTRONOMY) . . . . MUONS IONS GS EXTRATERRESTRIAL RADIATION . . . . PIONS ISOTOPES EXTRATERRESTRIAL RADIO WAVES . . . VECTOR MESONS NEUTRONS . . GALACTIC RADIO WAVES . . . . . RHO-MESONS NUCLEAR ISOBARS . . . NORTH POLAR SPUR . . . . . SIGMA-MESONS r NUCLEI (ASTRONOMY) ... PHOTONS NUCLEONS . GALACTIC RADIATION . . . XI HYPERONS r PHYSICS . . GALACTIC RADlO WAVES . . NUCLEONS PROTONS NUCLEOSYNTHESlS OBERON-(CONZ) OCCULTA~ON-(WNZ) USE NUCLEAR FUSION . . URANUS SATELLITES . STELLAR OCCULTATION . . . OBERON RT =CONJUNCTION NWArnN RT URANUS (PLANET) ECLIPSES UF NUTATIONAL OSCILLATION EXTINGUISHING PINHOLE OCCULTER FACILITY RT ACTUATION OBSCURATION DISPLACEMENT USE OCCULTATION mDYNAMICS EARTH ORIENTATION ODESSA METEORITE KINEMATICS GS CELESTIAL BODIES UBRAilON GS OBBUIVA+ORIES . METEORITES ASTRONOMICAL OBSERVATORIES mMOTU)N . . . IRON METEORITES PERTURBATION . . ASTRONOMICAL SATELLITES . . . ODESSA Mmoum POLAR WANDERING (GEOLOGY) . . . ASTRONOMICAL NrnERLANOS SATELLITE PRECESSION OKHANSK wmmm ROTATION . . . GAMMA RAY OBSERVATORY . . . HEAO GS CELESTIAL BODIES . . . . HEAO 1 . METEORITES .... HEAO2 . . OKHANSK METEORITE NUTATIONAL OSCllLATlON .... HEAO3 ' RT IRON METEORITES USE ilUTATlON . . . HUBBLE SPACE TELESCOPE STONY METEORITES . . . INFRARED ASTRONOMY SATELLITE . . . INFRARED SPACE OBSERVATORY (I=) UF MlRA CETI STAR . . . IUE GS CELESTIAL BODIES . . . MAGELLAN ULTRAVIOLET . STARS ASTRONOMY SATELLITE . . GIANT STARS 0 STARS ... om . . . OMCRON cm STAR GS CELESTIAL BODIES . . LATE STARS . STARS . . . COOL STARS . . EARLY STARS . . . . MlRA VARIABLES . . . HOT STARS ...OSO . . . . . OMICRON CETI STAR .... OSTARS . . . . AOSO . . VARIABLE STARS RT BLUE STARS . . . . 0501 . . . MlRA VARIABLES WOLF-RAYET STARS . . . . OMICRON cm srn~

OAO OORT CLOUD UF ORBITING ASTRONOMICAL RT mCLOUDS OBSERVATORY COMET NUCLEI 518 SATELLITE COMETS GS OBSERVATORIES NEMESIS (STAR) . ASTRONOMICAL OBSERVATORIES SOLAR SYSTEM . . ASTRONOMICAL SATELLITES . . . SAS . . . OAO . . . . EXPLORER 53 SATELLITE .... OAO1 . . . . SAS-1 OPEN CLUSTERS .... OA02 . . . . SAS-2 GS CELESTIAL BODIES .... OAO3 . . . . SAS-3 . STAR CLUSTERS RT AGENA B ROCKET VEHICLE . . . SPACE INFRARED TELESCOPE . . OPEN CLUSTERS ATLAS LAUNCH VEHICLES FAClLllY . . . PLEIADES CLUSTER HEAO . . . SPARTAN SATELLITES . . . PRAESEPE STAR CLUSTERS HEAO 1 . . . X RAY ASTROPHYSICS FACILITY HEAO 2 . . ASTROPLANE OPEN PROJECT HEAO 3 . . ROSAT MISSION UF ORIGIN OF PLASMAS IN EARTH MANNED ORBITAL TELESCOPES . GEOPHYSICAL OBSERVATORIES NEIGHBORHOOD . ,000 GS PROGRAMS OAO 1 . . . EGO . NASA PROGRAMS UF OAO-A . . . 000-A . . NASA SPACE PROGRAMS GS OBSERVATORIES . . . 060-3 . . OPEN PROJECT . ASTRONOMICAL OBSERVATORIES . . . om-5 . PROJECTS . . ASTRONOMICAL SATELLITES ...POGO . . OPEN PROJECT . . . OAO ....060*: . SPACE PROGRAMS .... Oh01 . . . . OGQ4 . . NASA SPACE PROGRAMS RT ATLAS CENTAUR LAUNCH VEHICLE . . . . OGo-6 . . . OPEN PROJECT . . OSO RT EARTH ATMOSPHERE OAO2 . . . OSO-C EARTH MAGNETOSPHERE UF OAO-A2 . . . om-1 PLASMA DIAGNOSTICS GS OBSERVATORIES PLASMA PHYSICS . ASTRONOMICAL OBSERVATORIES PLASMASPHERE . . ASTRONOMICAL SATELLITES SATELLITE-BORNE INSTRUMENTS . . OAO SPACE PLASMAS .... OAO2 ATLAS CENTAUR LAUNCH VEHICLE . . . OSO-7 . . . OSO-8 OPHlUCHl CLOUDS RT CLOUD PHYSICS OAO 3 . JODRELL BANK OBSERVATORY . LUNAR OBSERVATORIES x CLOUDS UF COPERNICUS SPACECRAFT INTERSTELLAR GAS 0AO-C . SOLAR OBSERVATORIES . . OSO INTERSTELLAR MATTER GS OBSERVATORIES NEBULAE . ASTRONOMICAL OBSERVATORIES . . . AOSO . . ASTRONOMICAL SATELLITES . . . OSO-C . . . OAO . . . OSO-1 OPlK THEORY .... OAO3 . . . 050-2 RT NEBULAE RT ATLAS CENTAUR LAUNCH VEHICLE . . . 050-3 ORION CONSTELLATION . . . OSO-4 ORION NEBULA OAO-A . . . 0%-5 SUPERNOVAE USE OAO 1 . . . 050-6 r THEORIES . . . 093-7 . . . om-8 OAO-A2 OPTICAL DEPTH . . PINHOLE OCCULTER FACILITY USE OPTICAL THICKNESS USE OAO 2 RT ARTIFICIAL SATELLITES

0AO-C OCCULTATION OPTICAL' EMISSION USE OAO 3 UF OBSCURATION USE LIGHT EMISSION GS OCCULTATION OBERQN . LUNAR OCCULTATION OPTICAL SPECTRUM GS CELESTIAL BODIES . . SOLAR ECLIPSES USE LIGHT (VISIBLE RADIATION) NATURAL SATELLITES . RADIO OCCULTATION SPECTRA ORBITS

OPTICAL THICKNESS ORBITAL MECH*NICS-(WNX) ORBITAL VELOCITY-(WNX) UF OPTICAL DEPTH CIRCULAR ORBITS . ORBITAL VELOCITY RT ANTIREFLECTION COATINGS DRIFT RATE RT ANGULAR VELOCITY FERMAT PRINCIPLE EARTH ORBITAL RENDEZVOUS ESCAPE VELOCITY mOPTICS EARTH ORBITS m HYPERVELOCITY REFRACTlVlTY EARTH-MARS TRAJECTORIES VELOCITY ERRORS THICKNESS EARTH-MERCURY TRAJECTORIES EARTH-MOON SYSTEM mBrnffi ASTRONOMICAL OBSERVATORY ELLIPTICAL ORBITS ORBIT CALCULATION USE OAO UF SATELLITE ORBlT CALCUU\TION EQUATORIAL ORBITS RIGHT MECHANICS GS COMPUTATION ORBITIffi LUNAR STATIONS FUGHT OPTlMlZATlON ORBIT CALCULATION GS ARTIFICIAL SATELLITES . OOMlARD TRAJECTORY . . MINIMUM VARIANCE ORBlT LUNAR SATELLITES DETERMINATION SYSTEM . DETERMINATION ORBmffi LUNAR STATIONS HANSEN LUNAR THEORY . . RT FUGHT MECHANICS SPACE STATIONS HILL LUNAR THEORY . GODDARD TRAJECTORY . ORBlTlffi LUNAR STATIONS DETERMINATION SYSTEM HILL METHOD LUNAR SPACECRAFT INTERPLANETARY TRAJECTORIES ORBITAL ELEMENTS LUNAR SATELLITES INTERPLANETARY TRANSFER ORBITS . ORBITAL MECHANICS ORBITING LUNAR STATIONS LAGRANGIAN EQUILIBRIUM POINTS . ORBITAL POSITION ESTIMATION STATIONS LUNAR ORBITAL RENDEZVOUS ORBITAL RESONANCES (CELESTIAL SPACE STATIONS LUNAR ORBITS MECHANICS) ORBITING LUNAR STATIONS MANY BODY PROBLEM QUADRATURES RT LUNAR BASES m MECHANICS (PHYSICS) r SPACECRAFT MOON-EARTH TRAJECTORIES ORBIT DECAY ORBlT CALCULATION RT AERODYNAMIC DRAG ORBlT DECAY ORBrnffi SOLAR OBSERVATORY ATMOSPHERIC ENTRY ORBIT PERTURBATION USE OSO FLIGHT MECHANICS ORBITAL RESONANCES (CELESTIAL ORBITAL MECHANICS MECnANlCSI ORrn SATELLITE LIFETIME ORBITS UF ORBITAL MOTION PARKING ORBITS PERIODIC ORBITS ORBIT EWATWNS PERTURBATION GS ORBITS USE ORBITAL MECHANICS PLANETARY LANDING . CIRCULAR ORBITS POYNTINEROBERTSON EFFECT . . STATIONARY ORBITS ORBITAL ASSEMBLY QUAORANRES . EARTH ORBITS UF CONSTRUCTlON IN SPACE RENDUVOUS . . APCGEES SPACECRAFT ORBITAL ASSEMBLY RENDEZVOUS TWECTORIES . . PERIGEES GS ASSEMBLING ROUND TRIP TRAJECTORIES . ECCENTRIC ORBITS . ORBITAL ASSEMBLY SATELLITE ORBITS . ELLIPTICAL ORBITS RT EXPANDABLE STRUCTURES SATELLITE PERTURBATION . . APHELIONS INFLATABLE SPACECRAFT SPACE NAVIGATION . , APOGEES SELF ERECTING DEVICES SPACECRAFT ORBITS . . PERIGEES SPACE ERECTABLE STRUCTURES . . PERIHELIONS SPACE OPERATIONS CENTER (NASA) SWINGBY TECHNIQUE . . TRANSFER ORBITS SPACE STATION STRUCTURES THRUST PROGRAMMING . . . INTERPLANETARY TRANSFER SPACECRAFT MODULES TRAJECTORY ANALYSIS ORBITS SPACECRAFT STRUCTURES TRANSEARTH INJECTION . EQUATORIAL ORBITS TRANSFER ORBITS . . STATIONARY ORBITS TRANSLUNAR INJECTION LUNAR ORBITS ORBITAL ELEMENTS . TWENTY-FOUR HOUR ORBITS PLANETARY ORBITS RT -ELEMENTS . TWO BODY PROBLEM SOLAR ORBITS ORBlT CALCULATION . ORBlT PERTURBATION . . APHELIONS PERTURBATION THEORY ORBITAL MOTION . . PERIHELIONS SLATER ORBITALS USE ORBITS . SPACECRAFT ORBITS . . SATELLITE ORBITS . . . GEOSYNCHRONOUS ORBITS ORBITAL LAUNCHlffi ORBITAL POSmON ESTIMATION . . . PARKING ORBITS GS ESTIMATING SN (LAUNCHING FROM AN POLAR ORBITS ORBITAL POSITION ESTIMATION . . . ORBIT-EXCLUDES LAUNCHING INTO . . . . STATIONARY ORBITS ORBlT FROM GROUND) RT CELESTIAL SPHERE . TWENTY-FOUR HOUR ORBITS GODDARD TRAJECTORY . . GS LAUNCHING . . TRANSFER ORBITS DETERMINATION SYSTEM . ROCKET LAUNCHING . . . INTERPLANETARY TRANSFER NAVIGATION . . ORBITAL LAUNCHING ORBITS ORBlT CALCULATION RT INTERPLANETARY TRAJECTORIES TROJAN ORBITS =ORIENTATION . LUNAR LAUNCH STELLAR ORBITS POSITION (LOCATION) . PAYLOAD DELIVERY (STS) RT AIRBORNE RANGE AN3 ORBlT POSITION ERRORS SPACECRAFT LAUNCHING DETERMINATION m RANGE TRANSFER ORBITS APEXES SATELLITE ORBITS ARTIFICIAL SATELLITES SPACECRAFT ORBITS ORBITAL LIFETIME ASTRODYNAMICS SPACECRAFT POSITION INDICATORS RT AlTITUDE CONTROL CELESTIAL BODIES STATE ESTIMATION EARTH ORBITS CELESTIAL MECHANICS x CONJUNCTION ORBITAL MANEUVERS ORBITAL RESONANCES (CELESTIAL MECHANIC EARTH-VENUS TRAJECTORIES GS MANEUVERS GS RESONANCE EPHEMERIDES . SPACECRAFT MANEUVERS . ORBITAL RESONANCES (CELESTIAL FLIGHT OPTIMIZATION . . ORBITAL MANEUVERS MECHANICS) FLIGHT PATHS RT ORBlT MANEUVERING ENGINE (SPACE RT ASTRODYNAMICS FOUR BODY PROBLEM SHUTTLE) CELESTIAL MECHANICS GROUND TRACKS SPACE NAVIGATION GRAVITATIONAL EFFECTS c INCLINATION SPACE SHUTTLES LIBRATION INTERPLANETARY FLIGHT LIBRATIONAL MOTION LUNAR FLIGHT ORBITAL MECHANICS ORBlT CALCULATION MANY BODY PROBLEM UF ORBlT EQUATIONS ORBlT PERTURBATION x MOTION GS CLASSICAL MECHANICS ORBITAL MECHANICS ORBITAL MECHANICS . SPACE MECHANICS OSCILLATIONS ORBITALS . . ORBITAL MECHANICS PLANETARY ORBITS r PATHS . . . KEPLER LAWS PLANETARY SYSTEMS QUADRATURES . . . MINIMUM VARIANCE ORBlT SATELLITE ORBITS ROCHE LIMIT DETERMINATION SOLAR ORBITS SATELLITE GROUND TRACKS RT AEROMANEUVERING ORBlT TO ORBlT SCHWARZSCHILD METRIC SHUlTLE ORBITAL VELOCITY SPACE FLIGHT APSIDES GS RATES (PER TIME) SPACE NAVIGATION ASTRODYNAMICS . ORBITAL VELOCITY SPACECRAFT GUIDANCE CELESTIAL MECHANICS VELOCITY STATIONKEEPING ORES

ORBITS-(CON%) -(CONT.) SUBORBITAL FLIGHT . . oso THREE BODY PROBLEM . . . 050-2 TRAJECTORIES . . . OSO-8 DELTA LAUNCH VEHICLE TWO BODY PROBLEM . SOLAR OBSERVATORIES ..OSO ORES . . . AOSO OSO-E USE MINERALS . . . OSOC ARTIFICIAL SATELLITES . . . oso-1 . GEOPHYSICAL SATELLITES . . . oSO-2 . . oso GS CELESTIAL BODIES . . . OSO-3 . . .0883 . METEORITES ...0504 OBSERVATORIES . . STONY METEORITES . . . OSO-5 . ASTRONOMICAL OBSERVATORIES . . . CHONORITES . . . OSOB . . ASTRONOMICAL SATELLITES . . . . CARBONACEOUS METEORITES . . . OSO-7 ...OS0 . . . . . ORQUEIL moRm . . . OSOg . . . . 080-3 RT SUN . GEOPHYSICAL OBSERVATORIES ORIGIN Of PLASMAS IN EARTH NEIQHBORHOOD THOR DELTA LAUNCH VEHICLE . . OSO USE OPEN PROJECT . . . 050-3 OSO-A . SOLAR OBSERVATORIES ORlON CONSTELLATION USE OSO-1 . . OSO GS CONSTELLATIONS . ORlON CONSTELLATION DSO-8 RT OPlK THEORY USE 0.50-2 ORlON NEBULA OSO-D SIGMA ORIONIS os0.c ARTIFICIAL SATELLITES UF 557 SATELLITE . GEOPHYSICAL SATELLITES . . OSO ORlON NEBULA GS ARTIFICIAL SATELLITES ...OSO-r GS CELESTIAL BODIES . GEOPHYSICAL SATELLITES . NEBULAE . . OSO OBSERVATORIES . . ORION NEBULA ...os0.c . ASTRONOMICAL OBSERVATORIES ASTRONOMICAL SATELLITES HYDRCGEN CLOUDS OBSERVATORIES . . OSO . ORION NEBULA . GEOPHYSICAL OBSERVATORIES . . . RT ASTROPHYSICS . . OSO . . . . OSO-4 CASSIOPEIA A . . . os0.c . GEOPHYSICAL OBSERVATORIES CRAB NEBULA . SOLAR OBSERVATORIES . . OSO GAWIES . . OSO . . .oso.r GUM NEBULA . . . os0.c . SOLAR OBSERVATORIES INTERSTELLAR GAS RT DELTA LAUNCH VEHICLE . . OSO INTERSTELLAR MATTER . . . 090J IRREGULAR GALAXIES DELTA LAUNCH VEHICLE 050-D MAGELLANIC CLOUDS USE OSO-4 MILKY WAY GALAXY OPlK THEORY OSO-F ORlON CONSTELLATION 0So.E ARTIFICIAL SATELLITES PLANETARY NEBULAE USE OSO-3 . GEOPHYSICAL SATELLITES STELLAR CORONAS . . OSO SUPERNOVAE 0so.F . . . 050-5 USE OSO-5 OBSERVATORIES ORIONID METEOROIDS . ASTRONOMICAL OBSERVATORIES GS CELESTIAL BODIES OSOB . . ASTRONOMICAL SATELUTES . METEOROID SHOWERS USE OSO-6 ...OSO . . ORIONID METEOROIDS . . . . 050-5 . METEOROIDS 090-H . GEOPHYSICAL OBSERVATORIES . . ORIONID METEOROIDS USE OSO-7 . . OSO RT AQUARID METEOROlDS ... 050.5 OSOJ . SOLAR OBSERVATORIES ORRERIES USE OSOg . . oso USE ASTRONOMICAL MODELS ...050-5 8561 OSO UF OSO-A UF ORBITING SOLAR OBSERVATORY S-16 SATELLITE OSO-G GS ARTIFICIAL SATELLITES GS ARTIFICIAL SATELLITES ARTIFICIAL SATELLITES . GEOPHYSICAL SATELLITES . GEOPHYSICAL SATELLITES . GEOPHYSICAL SATELLITES . . oso . . OSO . . OSO . . . OSO-C ... 050-1 . . .OSO-s . . . oso-1 OBSERVATORIES OBSERVATORIES . . . ow-2 . ASTRONOMICAL OBSERVATORIES . ASTRONOMICAL OBSERVATORIES . . . 0-3 . . ASTRONOMICAL SATELLITES . . ASTRONOMICAL SATELLITES . . . 0934 ... OSO . . . oso . . . OSO-5 . . . . OSO-1 . . . . 0s- . . . OSOd . GEOPHYSICAL OBSERVATORIES . GEOPHYSICAL OBSERVATORIES . . . OSO-7 . . oso . . oso . . . OSO-8 . . . 050-1 ... OSOd OBSERVATORIES . SOLAR OBSERVATORIES . SOLAR OBSERVATORIES . ASTRONOMICAL OBSERVATORIES . . OSO . . oso . . ASTRONOMICAL SATELLITES ... 050-1 ... Oso RT DELTA LAUNCH VEHICLE . . . . AOSO . . . . OSO-1 050-2 OSO-H . . . . OW-2 UF OSO-B ARTIFICIAL SATELLITES . . . . OSO-3 S-17 SATELLITE . GEOPHYSICAL SATELLITES . . . . OSO-4 GS ARTIFICIAL SATELLITES . . oso . . . . OSO-5 . GEOPHYSICAL SATELLITES . . . OSO-7 . . . . OSO-6 . . oso OBSERVATORIES . . . . OSO-7 . . . 050.2 ASTRONOMICAL OBSERVATORIES . . OSO-8 OBSERVATORIES ASTRONOMICAL SATELLITES GEOPHYSICAL OBSERVATORIES . ASTRONOMICAL OBSERVATORIES . . . oso OSO . . ASTRONOMICAL SATELLITES - . . 050-7 OSO GEOPHYSICAL OBSERVATORIES . . 050-2 . OSO GEOPHYSICAL OBSERVATORIES . . 050-7 . . oso . SOLAR OBSERVATORIES . . . 050-2 OSO . SOLAR OBSERVATORIES OSO-7 PARTICLE PRODUCTION

OSO-~-(CONZ) PARTICLE DENSITY (CONCENTRATION)-(CONE) RT DUAL SPIN SPACECRAFT SPACE DENSITY SPATIAL DISTRIBUTION PALEOMAGNETISM GS MAGNETIC FIELDS OSOs . PALEOMAGNETiSM UF OSO-J MAGNETIC PROPERTIES PARTICLE DETECTORS GS ARTIFICIAL SATELLITES PALEOMAGNRISM USE RADIATION COUNTERS GEOPHYSICAL SATELLITES . . RT ARCHAEOLOGY ..OSo CONES (VOLCANOESI ...oso.o CONTIN~NTAL DRIFT. PARTICLE FWX OBSERVATORIES GEOLOGY USE FLUX (RATE) . ASTRONOMICAL OBSERVATORIES GEOMAGNETISM . . ASTRONOMICAL SATELLITES GEOPHYSICS ... OSO ....osod MARS VOLCANOES PMMCLE nux DENSITY REMANENCE SN (LIMITED TO PARTICLE EMlSSlON OR . GEOPHYSICAL OBSERVATORIES ROCKS DETECTION RATE PER UNIT AREA) . . --- VOLCANOES GS RATES (PER TIME) . . ,0506 VOLCANOLOGY . FLUX DENSITY ' . SOLAR OBSERVATORIES . RADIANT FLUX DENSITY . . OSO . PANTAR CHONDRES . . . PARTICLE FLUX DENSITY GS CELESTIAL BODIES . . . . ELECTRON FLUX DENSITY . METEORITES . . . NEUTRON FLUX DENSITY . . STONY METEORITES . . . . PROTON FLUX DENSITY OSS-1 PAYLOAD RT HELIOS SATELLITES GS PAYLOADS mPARTICLE INTENSITY SPACE SHUlTLE PAYLOADS . RADIANCY . . OSS-1 PAYLOAD RADIATION COUNTERS RT EXPLORATION PARABOLIC VELOCITY RADIATION PRESSURE GET AWAY SPECIALS (STS) USE ESCAPE VELOCITY SOLAR CONSTANT INVESTIGATION SOLAR FLUX DENSITY NASA PROGRAMS PARALUX SPACE TRANSPORTATION SYSTEM 0s PARALLAX SPACEBORNE EXPERIMENTS . SOLAR PARALLAX . STELLAR PARALLAX m PARTICLE INTENSITY RT ASTROMETRY SN (USE OF A MORE SPECIFIC TERM IS OUTER PLANET MISSIONS COMPANION STARS RECOMMENDED-CONSULT THE TERMS USE GRAND TOURS mOPTICS USED BELOW RT PARTICLE ENERGY PARTICLE FLUX DENSITY PARKING ORBITS OUTER PLANET SPACECRAFT GS ORBITS USE OUTER PLANETS EXPLORERS . SPACECRAFT ORBITS . . SATELLITE ORBITS PARTICLE INTERACTIONS . . PARKING ORBITS GS PARTICLE INTERACTIONS OUTER PLANETS EXPLORERS . RT EARTH ORBITS . ELEMENTARY PARTICLE UF OUTER PLANET SPACECRAFT EARTH-MOON TRAJECTORIES INTERACTIONS ' PLANETARY EXPLORER FLIGHT OPTIMIZATION . . HIGH ENERGY INTERACTIONS RT DELTA LAUNCH VEHICLE INTERPLANETARY TRAJECTORIES . . . STRONG INTERACTIONS (FIELD EXPLORER SATELLITES LUNAR ORBITS THEORY) FLYBY MISSIONS LUNAR TRAJECTORIES MESON-MESON INTERACTIONS GRAND TOURS ORBITAL MECHANICS MESON-NUCLEON INTERACTIONS INTERPLANETARY FLIGHT m PARKING . . NUCLEAR CAPTURE MARS PROBES PLANETARY ORBITS . . . ELECTRON CAPTURE mSPACECRAFT THRUST PROGRAMMING . . NUCLEON-NUCLEON INTERACTIONS TOPS (SPACECRAFr) TRANSFER ORBITS . . WEAK ENERGY INTERACTIONS VENUS PROBES . . . WEAK INTERACTIONS (FIELD THEORY) PARTICLE ACCELERATION ION ATOM INTERACTIONS OUTER RADIATION BELT GS RATES (PER TIME) . MOLECULAR INTERACTIONS GS PARTICLES . ACCELERATION (PHYSICS) . . MOLECULAR COLLISIONS . CHARGED PARTICLES . . PARTICLE ACCELERATION . NUCLEAR INTERACTIONS . . MAGNETICALLY TRAPPED PARTICLES RT mACCELERATION . . NUCLEAR CAPTURE . . . RADIATION BELTS ELECTROMAGNETIC ACCELERATION . . . ELECTRON CAPTURE . . . . OUTER RADIATION BELT MAGNETIC FIELDS . . SPIN-ORBIT INTERACTIONS TRAPPED PARTICLES PLASMA ACCELERATION . . . ELECTRON CAPTURE . MAGNETICALLY TRAPPED PARTICLES RACETRACKS (PARTICLE . . WEAK INTERACTIONS (FIELD . . RADIATION BELTS ACCELERATORS) THEORY) . . . . OUTER RADIATION BELT PLASMA-PARTICLE INTERACTIONS RT ARTIFICIAL RADIATION BELTS PARTICLE COUNTERS RT BRAGG CURVE INNER RADIATION BELT USE RADIATION COUNTERS CHARM (PARTICLE PHYSICS) PROTON BELTS CHEMICAL REACTIONS co RADIATION PARTICLE DENSIN (CONCENTRATION) COLLISION PARAMETERS GS DENSITY (NUMBERIVOLUME) . ELECTRON PHONON INTERACTIONS ELECTRON SCATTERIN' OXYGEN SPECTRA PARTICLE DENSITY (CONCENTRATION) FEYNMAN DIAGRAMS GS SPECTRA . . ELECTRON DENSITY FLAVOR (PARTICLE PHYSICS) . OXYGEN SPECTRA (CONCENTRATION) m INTERACTIONS RT AIRGLOW . . . CARRIER DENSITY (SOLID STATE) NEUTRAL CURRENTS HERZBERG BANDS . . . ELECTRON DENSITY PROFILES NUCLEAR REACTIONS MOLECULAR SPECTRA . . . IONOSPHERIC ELECTRON DENSITY PHOTONUCLEAR REACTIONS SOLAR SPECTRA . . . MAGNETOSPHERIC ELECTRON DENSITY PHOTOPHORESIS . . ELECTRON DISTRIBUTION QUANTUM CHROMODYNAMICS OZONE LAYER . . . ELECTRON DENSITY PROFILES USE OZONOSPHERE . . ION DENSITY (CONCENTRATION) . . . IONOSPHERIC ION DENSITY PARTICLE PRODUCTION . . . MAGNETOSPHERIC ION DENSITY GS PARTICLE PRODUCTION OZONOSPHERE . . . MAGNETOSPHERIC PROTON KAON PRODUCTION UF OZONE LAYER DENSITY PAIR PRODUCTION GS EARTH ATMOSPHERE . . . PROTON DENSITY PHOTOPRODUCTlON . MIDDLE ATMOSPHERE (CONCENTRATION) RT COMMINUTION . . STRATOSPHERE . . . . MAGNETOSPHERIC PROTON CORPUSCULAR RADIATION ...OZONOSPHERE DENSITY HIGH ENERGY INTERACTIONS RT CHEMOSPHERE PLASMA DENSITY NUCLEAR SADIATION HOMOSPHERE RT ATMOSPHERIC DENSITY NUCLEAR REACTIONS OZONE DEPLETION ESRO 4 SATELLITE PARTICLESRADIOACTIVITY UMKEHR EFFECT ION STRIPPING UPPER ATMOSPHERE IONOSPHERIC COMPOSITION SPALLATION PARTICLE TELESCOPES PERSEID METEOROIDS PHOTODETECTORS UF ELECTRON TELESCOPES GS CELESTIAL BODIES USE PHOTOMETERS GEP TELESCOPES . METEOROID SHOWERS GODDARD EXPERIMENT PACKAGE . . PERSEID UETEOROIDS PHOTOELECTROMAGNETIC DETECTORS TELESCOPE . METEOROIDS USE PHOTOELECTROMAGNETIC EFFECTS PROTON TELESCOPES . . PERSEID METEOROIDS RADIATION MEASURING INSTRUMENTS GS MEASURING INSTRUMENTS COUNTERS . PERSONNEL BROWWON SYSTEMS PHOTOEMISSIVITV RADIATION COUNTERS . . USE SELF MANEUVERING UNITS USE EMISSIVITY . . . PARTICLE TELESCOPES PHOTOELECTRIC EMISSION . RADIATION MEASURING INSTRUMEN1 . . RADIATION COUNTERS rs ParwWATIoN . . . PmLETEllsCOPES GS PERTURMTtON PHOTOGRAMMETRY TELESCOPES . ORBIT PERTURBATION UF PHOTOCUNOMETRY GS PHOTOGRAPHIC MEASUREMENT . PARllCLE TUESCOPES . . SATEUITE PERTURBATION RT GEIGER COUNTERS RT mDISTUR8ANCES . PHOTOQRIMMrnY SATELLITE-BORNE INSTRUMENTS FOUR BODY PROBLEM RT AERIAL PHOTOGRAPHY SCINTILLATION COUNTERS GEODESY MAPPING LONG TERM EFFECTS PHOTOGEOLOGY PHOTORECONNAISSANCE MANY BODY PROBLEM---- PASCHEN SERIES NUTAT~~N PROJECTORS GS SPECTRA ORBITAL MECHANICS RELIEF MAPS . RADIATION SPECTRA OSCILLATIONS STEREOPHOTOGRAPHY . ELECTROMAGNETIC SPECTRA . OSCILLATORS SURVEYS LINE SPECTRA . . . RADIATION PRESSURE TERRAIN ANALYSIS PASCHEN SERIES . . . . SCHACH EFFECT RT ABSORPTION SPECTRA THREE BODY PROBLEM PHOTOGRAPHIC TRACKING ATOMIC SPECTRA TWO BODY PROBLEM GS TRACKING (POSITION) ELECTRON TRANSmONS VARIATIONS . PHOTOGRAPHIC TRACKING EMISSION SPECTRA RT CINETHEODOLITES H LINES OPTlCAL TRACKING HYDROGEN PETROGRAPHY PHOTOGRAPHY GS GEOLOGY SATELLITE TRACKING PETROLOGY PECUUAR STIRS . SPACE DETECTION AND TRACKING PETROQRAPHY GS CELESTIAL BODIES . . SYSTEM RT INLIERS lLANDFORMSI STARS . ROCKS PECUUAR STARS . . SEDIMENTARY RQCKS PHOTOGRAPHS . . . SIGMA ORIONIS GS PWTOGRAPHS . . . SYMBIOTIC STARS . CLOUD PHOTOGRAPHS RT A STARS PETROLOGY . LUNAR PHOTOGRAPHS B STARS GS GEOLOGY . MARS PHOTOGRAPHS HOT STARS . PETROLOGY . MICROPHOTOGRAPHS MAGNETIC STARS . . PETROGRAPHY . MOTION PICTURES STELLAR SPECTRA RT CONES (VOLCANOES) . PHOTOMICROGRAPHS STELLAR SPECTROPHOTOMETRY FORMATIONS RT DISPLAY DEVICES STELLAR STRUCTURE GEOCHEMISTRY IMAGES GEOLOGICAL SURVEYS MOSAICS PENETRATING PARTICLES GEOPHYSICS OPTICAL CORRECTION PROCEDURE IMPACT MELTS USE CORPUSCULAR RADIATION PHOTOGRAPHIC DEVELOPERS INLIERS (LANDFORMS) PHOTOGRAPHIC FILM MARS VOLCANOES PHOTOGRAPHIC PLATES PENUMBRAS MINERALOGY PHOTOGRAPHIC PROCESSING GS SHADOWS ROCKS PHOTOGRAPHIC RECORDING . PENUMBRAS STRATIGRAPHY PHOTOGRAPHY RT ECLIPSES VOLCANOES PIXELS UMBRAS VOLCANOLOGY REPRESENTATIONS SPATIAL FILTERING PERIGEES PHASF: SWITCHING INTERFEROMFlKrRS VISUAL AIDS GS APSIDES GS MEASURING INSTRUMENTS XEROGRAPHY . PERIGEES INTERFEROMETERS ORBITS . PHASE SWKCHING PHOTOGRAPHY . EARTH ORBITS INTERFEROMETERS GS PHOTOGRAPHY . . PERIGEES RT RADIO ASTRONOMY AERIAL PHOTOGRAPHY . ELLIPTICAL ORBITS RADIO TELESCOPES ALL SKY PHOTOGRAPHY . . PERIGEES ASTRONOMICAL PHOTOGRAPHY RT APOGEES m PHASES AUTORADIOGRAPHY PERILUNES SN (USE OF A MORE SPECIFIC TEqM IS BLACK AND WHITE PHOTOGRAPHY RECOMMENDED-CONSUL T THE TERMS CHRONOPHOTOGRAPHY PERIHELIONS LISTED BELOW) CINEMATOGRAPHY GS APSIDES RT CYCLES CLOUD PHOTOGRAPHY PERIHELIONS LIQUID PHASES COLOR PHOTOGRAPHY ORBITS LUNAR PHASES ELECTRO-OPTICAL PHOTOGRAPHY . ELLIPTICAL ORBITS PHASE SHIFT 5LECTRON PHOTOGRAPHY . . PERIHELIONS PHASE TRANSFORMATIONS FRACTOGRAPHY SOLAR ORBITS SOLID PHASES FRAME PHOTOGRAPHY . . PERIHEUONS TERMINATOR LINES HIGH SPEED PHOTOGRAPHY RT APHELIONS VAPOR PHASES HOLOGRAPHY ACOUSTICAL HOLOGRAPHY MICROWAVE HOLOGRAPHY PERILUNES PHOBOS SPECKLE HOLOGRAPHY GS APSIDES GS CELESTIAL BODIES . NATURAL SATELLITES WHITE LIGHT HOLOGRAPHY . PERILUNES INFRARED IMAGERY RT LUNAR ORBITS . . MARS SATELLITES . . . PHOBOS LUNAR PHOTOGRAPHY LUNAR SATELLITES METRIC PHOTOGRAPHY PERIGEES RT DEIMOS MARS (PLANET) MICROWAVE PHOTOGRAPHY MULTISPECTRAL PHOTOGRAPHY INFRARED PHOTOGRAPHY PERIODIC ORBITS PHOEBE COLOR INFRARED PHOTOGRAPHY USE ORBITS GS CELESTIAL BODIES RADAR PHOTOGRAPHY NATURAL SATELLITES ORTHOPHOTOGRAPHY PERMAFROST . SATURN SATELLITES PHOTOMICROGRAPHY UF FROZEN SOILS . . . PHOEBE ROCKET-BORNE PHOTOGRAPHY GS SOILS RT SATURN (PLANET) SHADOWGRAPH PHOTOGRAPHY . PERMAFROST . SCHLIEREN PHOTOGRAPHY RT AUFEIS (ICE) PHOTOCUNOMETRY SPACEBORNE PHOTOGRAPHY POLAR REGIONS USE PHOTOGRAMMETRY . SATELLITE-BORNE PHOTOGRAPHY PIONEER VENUS SPACECRAFT

PuoToMmRs PINHOLE CAMERAS UF MICROPHOTOMETERS GS OPTICAL EQUIPMENT . STEREOSCOPY PHOTODETECTORS . CAMERAS . . STEREOPHOTOGRAPHY GS MEASURING INSTRUMENTS . . PINHOLE CAMERAS , STREAK PHOTOGRAPHY , OPTICAL MEASURING INSTRUMENTS PHOTOGRAPHIC EQUIPMENT . ULTRAVIOLET PHOTOGRAPHY . . PHOTOMETERS . CAMERAS ULTRAVIOLET PHOTOMETRY . . . ELECTROPHOTOMETERS . . PINHOLE CAMERAS . . . ULTRAVIOLET SPECTROMETERS RT APERTURES . UROGRAPHY . . . ULTRAVIOLET PHOTOGRAPHY AT BRIGHTNESS DlSTRl8UTlON SPECTROPHOTOMETERS PINHOLE OCCULTER FACILITY BRIGHTNESS TEMPERATURE . RADIATION MEASURING INSTRUMENTS PINHOLES CAMERAS . . PHO'mums CLOUD PHOTCGRAPHS . . . ELECTROPHOTOMETERS PlNmKE OCCULTER FAClUTY DARKROOMS . . . ULTRAVIOLET SPECTROMETERS GS OBSERVATORIES EARTH OBSERVATIONS (FROM SPACE) . . . ULTRAVIOLET . SOLAR OBSERVATORIES EARTH RESOURCES SPECTROPHOTOMElERS . . PINH0I.E OCCULTER FACILITY EVAWROORAPHY OPTICAL EQUIPMENT RT OCCULTATION EXPOSURE . OPTICAL MEASURING INSTRUMENTS PINHOLE CAMERAS GRAPHIC ARTS . . PHOTOMETERS PINHOLES HS-801 AIRCRAFT . . . ELECTFIOPHOTOMETERS SPACEBORNE ASTRONOMY ICE MAPPING . . . ULTRAVIOLET SPECTROMETERS lMAGERY . . . ULTRAVIOLET PIONEER F SPACE PROBE IMAGING TECHNIQUES SPECTROPHOTOMETERS USE PIONEER 10 SPACE PROBE LUNAR PHOTOGRAPHS RT BOLOMETERS MAPPING OENSITOMETERS PIONEER G SPACE PROBE MARS PHOTOGRAPHS ELECTROPHOTOMETRY USE PIONEER 11 SPACE PROBE MICROPHOTOGRAPHS ELUPSOMETERS MULTISPECTRAL BAND CAMERAS HORIZON SCANNERS MEERPROJECT MULTISPECTRAL BAND SCANNERS INFRARED SPECTROPHOTOMETERS GS PROGRAMS PANORAMIC CAMERAS MICRODENSITOMETERS . NASA PROGRAMS PHOTOGRAPHIC DEVELOPERS NEPHELOMETERS . . NASA SPACE PROGRAMS PHOTOGRAPHIC EMULSIONS OPTICAL MEASUREMENT . . . PIONEER PROJECT PHOTOGRAPHIC EQUIPMENT PHOTOCONWCTORS . PROJECTS PHOTOGRAPHIC FILM PHOTOELECTRIC CELLS . . PIONEER PROJECT PHOTOGRAPHIC MEASUREMENT PHOTOGRAPHIC EQUIPMENT . SPACE PROGRAMS PHOTOGRAPHIC PLAES PHOTOMETRY . . NASA SPACE PROGRAMS PHOTOGRAPHIC PROCESSING PHOTOTRANSISTORS . . . PIONEER PROJECT PHOTOGRAPHIC PROCESSING POLARlMElERS RT LUNAR PROBES EQUIPMENT PYRANOMETERS PIONEER SPACE PROBES PHOTOGRAPHtC RECORDING RADIOMETERS SPACE PROBES PHOTOGRAPHIC RECTIFIERS REFLECTOMETERS PHOTOGRAPHIC TRACKING SPECTROMETERS PIONEER SATURN SPACECRAFT PHOTOGRAPHS SPECTROPHOTOMETERS USE PIONEER 11 SPACE PROBE PHOTOINTERPRETATION TELEPHOTOMETRY PHOTOLITHOGRAPHY TRANSMISSOMETERS PHOTOMAPPING ULTRAVIOLET DETECTORS PIONEER SPACE PROBES PHOTOMAPS GS INTERPLANETARY SPACECRAFT . PfONEER SPACE PROBES PHOTOMASKS . PHOTON DENSITY PHOTOMECHANICAL EFFECT . . PIONEER VENUS 2 ENTRY PROBES GS RATES (PER TIME) . . . PIONEER VENUS 2 NIGHT PROBE PHOTORECONNAISSANCE . FLUX DENSITY PINHOLE CAMERAS . . . PIONEER VENUS 2 SOUNDER . . PHOTON DENSITY PROBE PIXELS RT sauEmD STATES (QUANTUM THEORY) PROJECTORS . . PIONEER 1 SPACE PROBE RADIOGRAPHY . . PIONEER 2 SPACE PROBE RAPID BALLISTICS IDENTIFICATION PHOTONS . . PIONEER 3 SPACE PROBE REPRODUCTION (COPYING) GS PARTICLES . . PIONEER 4 SPACE PROBE TIMBER INVENTORY . ELEMENTARY PARTICLES . . PIONEER 5 SPACE PROBE WAVE FRONT RECONSTRUCTION . . BOSONS . . PIONEER 6 SPACE PROBE XEROGRAPHY . . . PHOTONS . . PIONEER 7 SPACE PROBE . . . . LIGHT BEAMS . . PIONEER 8 SPACE PROBE . NUCLEAR PARTICLES . . PIONEER 9 SPACE PROBE PHOTOMAPPING . . BOSONS . . PIONEER 10 SPACE PROBE GS MAPPING . . . PHOTONS . . PIONEER 11 SPACE PROBE . PHOTOMAPPING RT ANNIHILATION REACTIONS UNMANNED SPACECRAFT RT AERIAL PHOTOGRAPHY COSMIC RAYS . SPACE PROBES COASTAL ZONE COLOR SCANNER ELECTROMAGNETIC RADIATION . . PIONEER SPACE PROBES COLOR PHOTOGRAPHY GAMMA RAYS . . . PIONEER VENUS 2 ENTRY PROBES DMSP SATELLITES LIGHT (VISIBLE RADIATION) . . . . PIONEER VENUS 2 NIGHT PROBE EARTH RESOURCES NUCLEAR RADIATION . . . . PIONEER VENUS 2 SOUNDER GEODESY OPTICAL PROPERTIES PROBE GEOLOGY PHOTON BEAMS . . . PIONEER 1 SPACE PROBE GNOMONIC PROJECTION PHOTONICS . . . PIONEER 2 SPACE PROBE HOLOGRAMMETRY PHOTONUCLEAR REACTIONS . . . PIONEER 3 SPACE PROBE ICE MAPPING PHOTOPRODUCTION . . . PIONEER 4 SPACE PROBE MAPS PLANCKS CONSTANT . . . PIONEER 5 SPACE PROBE OCEAN COLOR SCANNER QUANTUM THEORY . . . PIONEER 6 SPACE PROBE PHOTOGEOLOGY m RADIATION . . . PIONEER 7 SPACE PROBE PHOTOGRAPHY ROTONS . . . PIONEER 8 SPACE PROBE PHOTOINTERPRETATION . . . PIONEER 9 SPACE PROBE ROCKET-BORNE PHOTOGRAPHY . . PIONEER 10 SPACE PROBE SATELLITE-BORNE PHOTOGRAPHY PHOTOSENSORS . . PIONEER 11 SPACE PROBE SOIL MAPPING USE RADIATION MEASURING INSTRUMENTS RT JUNO 2 LAUNCH VEHICLE SPACEBORNE PHOTOGRAPHY PIONEER PROJECT THEMATIC MAPPING PIONEER VENUS SPACECRAFT THERMAL MAPPING PHOTOSPHERE PIONEER VENUS 1 SPACECRAFT TOPOGRAPHY GS PHOTOSPHERE PIONEER VENUS 2 SPACECRAFT . SOLAR GRANULATION SOLAR PROBES PHOTOMAPS AT CHROMOSPHERE GS MAPS FACULAE PIONEER VENUS ORBITER PHOTOMAPS SOLAR ATMOSPHERE USE PIONEER VENUS 1 SPACECRAFT RT AERIAL PHOTOGRAPHY SOLAR PHYSICS PHOTOGRAPHY SPICULES PIONEER VENUS SPACECRAFT RELIEF MAPS STARSPOTS UF PIONEER 12 SPACE PROBE SATELLITE-BORNE PHOTOGRAPHY STELLAR ACTIVITY GS INTERPLANETARY SPACECRAFT SPACEBORNE PHOTOGRAPHY SUN PIONEER VENUS SPACECRAFT THEMATIC MAPPING SUNSPOTS . . PIONEER VENUS 1 SPACECRAFT PIONEER VENUS 1 SPACECRAFT

PIONEER VENUS SPACECRAFT-(CONZ) PIONEER 1 SPACE PROB€-(COWZ) PIONEER 10 SPACE PROBE . . PIONEER VENUS 2 SPACECRAFT . . PIONEER 1 SPACE PROBE UF PIONEER F SPACE PROBE ...PIONEER VENUS 2 TRANSPORTER UNMANNED SPACECRAFT GS INTERPLANETARY SPACECRAFT BUS . SPACE PROBES . PIONEER SPACE PROBES UNMANNED SPACECRAFT . . PIONEER SPACE PROBES . PIONEER 10 SPACE PROBE . PIONEER VENUS SPACECRAFT . . . PIONEER 1 SPACE PROBE UNMANNED SPACECRAFT . . PIONEER VENUS 1 SPACECRAFT RT THOR ABLE ROCKET VEHICLE . SPACE PROBES . . PIONEER VENUS 2 SPACECRAFT . . PIONEER SPACE PROBES . . . PIONEER VENUS 2 TRANSPORTER . . . PIONEER 10 SPACE PROBE Rl IS PIONEER 2 SPACE PROBE GS INTERPLANETARY SPACECRAn RT mPROBES PROBES PIONEERSPACE PIONEER SPACE PROBES m PROBES . PIONEER 2 SPACE PROBE PfONEER 11 SPACE PROBE SPACE PROEES . . UNMANNED SPACECRAFT UF PIONEER G SPACE PROBE . SPACE PROBES PIONEER SATURN SPACECRAFT PIONEER VENUS 1 SPACECRAFT . . PIONEER SPACE PROBES GS INTERPLANETARY SPACECRAFT UF PIONEER VENUS ORBITER . . . PIONEER 2 SPACE PROBE . PIONEER SPACE PROBES GS INTERPLANETARY SPACECRAFT . . PIONEER 11 SPACE PROBE- . PIONEER VENUS SPACECRAFT UNMANNED SPACECRAFT . . PIONEER VENUS 1 SPACECRAFT PIONEER 3 SPACE PROBE SPACE PROBES UNMANNED SPACECRAF,' GS INTERPLANETARY SPACECRAFT PIONEER SPACE PROBES . PIONEER VENUS SPACECRAFT . PIONEER SPACE PROBES . PIONEER 11 SPACE PROBE . . PIONEER VENUS 1 SPACECRAFT . . PIONEER 3 SPACE PROBE RT rPROBES RT PIONEER SPACE PROBES UNMANNED SPACECRAFT . SPACE PROBES r PROBES PIONEER 12 SPACE PROBE . PIONEER SPACE PROBES SPACE PROBES . USE PIONEER VENUS SPACECRAFT . . . PIONEER 3 SPACE PROBE RT JUNO 2 LAUNCH VEHICLE PIONEER VENUS 2 MULTlPROBE SPACECRAFT PLAOES (FACULAE) USE PIONEER VENUS 2 SPACECRAFT USE FACULAE PIONEER 4 LUNAR PROBE PIONEER VENUS 2 NIGHT PROBE USE PIONEER 4 SPACE PROBE PLAINS GS INTERPL4NETARY SPACECRAFT GS LAND . PIONEER SPACE PROBES PIONEER 4 SPACE PROEiE . PLAINS . . PIONEER VENUS 2 ENTRY PROBES UF PIONEER 4 LUNAR PROBE . . COASTAL PLAINS . . . PIONEER VENUS 2 NIGHT PROBE GS INTERPLANETARY SPACECRAFT . . FLOOD PLAINS UNMANNED SPACECRAFT . PIONEER SPACE PROBES . . LLANOS OWENTALES (COLOMBIA) . SPACE PROBES . . MEER4 SPACE PROBB . . PAMPAS . . PIONEER SPACE PROBES UNMANNED SPACECRAFT . . PENEPLAINS . . . PIONEER VENUS 2 ENTRY PROBES . SPACE PROBES . . PLAYAS . . . . PIONEER VENUS 2 NIGHT PROBE . . P!ONEER SPACE PROBES . . TUNDRA RT mPROBES . . . PIONEER 4 SPACE PROBE RT FARMLANDS RT JUNO 2 LAUNCH VEHICLE FLATS (LANDFORMS) PIONEER VENUS 2 SOUNDER PROBE GEOGRAPHY GS INTERPLANETARY SPACECRAFT GRASSLANDS . PIONEER SPACE PROBES PIONEER 5 SPACE PROBE GS INTERPLANETARY SPACECRAFT GREAT PLAINS CORRIDOR (NORTH . . PIONEER VENUS 2 ENTRY PROBES . PIONEER SPACE PROBES AMERICA) . . . PIONEER VENUS 2 SOUNDER LANDFORMS PROBE . . PIONEER 5 SPACE PROBE UNMANNED SPACECRAFT PLATEAUS UNMANNED SPACECRAFT STEPPES . SPACE PROBES . SPACE PROBES . . PIONEER SPACE PROBES TOPOGRAPHY . . PIONEER SPACE PROBES WILDERNESS . . PIONEER VENUS 2 ENTRY PROBES . . . PIONEER 5 SPACE PROBE . RT THOR ABLE ROCKET VEHICLE . . . . PIONEER VENUS 2 SOUNDER PLANET EPHEMERIDES PROBE PIONEER 6 SPACE PROBE GS EPHEMERIDES . PLANET EPHEMERIDES PIONEER VENUS 2 SPACECRAFT GS INTERPLANETARY SPACECRAFT . PIONEER SPACE PROBES RT GEOCENTRIC COORDINATES UF PIONEER VENUS 2 MULTIPROBE PLANETS SPACECRAFT . . PIONEER 6 SPACE PROBE GS INTERPLANETARY SPACECRAFT UNMANNED SPACECRAFT . SPACE PROBES PLANET ORIGINS . PIONEER VENUS SPACECRAFT USE PLANETARY EVOLUTION . . PIONEER VENUS 2 SPACECRAFT . . PIONEER SPACE PROBES . . . PIONEER VENUS 2 TRANSPORTER . . . PIONEER 6 SPACE PROBE BUS RT DELTA LAUNCH VEHICLE PLANETARIUMS . VENUS PROBES JUNO 2 LAUNCH VEHICLE RT ASTRONOMICAL MODELS . . PIONEER VENUS 2 SPACECRAFT DISPLAY DEVICES . . . PIONEER VENUS 2 TRANSPORTER PIONEER 7 SPACE PROBE BUS GS INTERPLANETARY SPACECRAFT PLANETARY ATMOSPHERES UNMANNED SPACECRAFT . PIONEER SPACE PROBES SN (EXCLUDES EARTH ATMOSPHERE) . PIONEER VENUS SPACECRAFT . . PIONEER 7 SPACE PROBE GS ENVIRONMENTS . . PIONEER VENUS 2 SPACECRAFT UNMANNED SPACECRAFT . EXTRATERRESTRIAL ENVIRONMENTS . . . PIONEER VENUS 2 TRANSPORTER . SPACE PROBES . . PLANETARY ENVIRONMENTS BUS . . PIONEER SPACE PROBES . . . PLANETARY ATMOSPHERES RT PIONEER SPACE PROBES . . . PIONEER 7 SPACE PROBE . . HELIUM HYDROGEN -s PROBES AT DELTA LAUNCH VEHICLE ATMOSPHERES z SPACECRAFT JUNO 2 LAUNCH VEHICLE . . . JUPITER ATMOSPHERE . . . MARS ATMOSPHERE . . MERCURY ATMOSPHERE PIONEER VENUS 2 TRANSPORTER BUS PIONEER 6 SPACE PROM . . GS INTERPLANETARY SPACECRAFT . . . . NEPTUNE ATMOSPHERE GS INTERPLANETARY SPACECRAFT . . . . PLANETARY IONOSPHERES PIONEER VENUS SPACECRAFT PIONEER SPACE PROBES . PIONEER VENUS 2 SPACECRAFT . . . . PLUTO ATMOSPHERE . . PIONEER 6 SPACE PROBE . . . SATURN ATMOSPHERE . . PIONEER VENUS 2 TRANSPORTER UNMANNED SPACECRAFT . RllS . . . . URANUS ATMOSPHERE --- . SPACE PROBES . . . . VENUS ATMOSPHERE VENUS PROBES . . PIONEER SPACE PROBES PIONEER VENUS 2 SPACECRAFT . . . . . VENUS CLOUOS . . . PIONEER 8 SPACE PROBE RT LABSORPTION PIONEER VENUS 2 TRANSPORTER AT JUNO 2 LAUNCH VEHICLE x ATMOSPHERES BUS T PROBES UNMANNED SPACECRAFT ATMOSPHERIC ATTENUATION PIONEER VENUS SPACECRAFT ATMOSPHERIC COMPOSITION PIONEER 9 SPACE PROBE ATMOSPHERIC DENSITY PIONEER VENUS 2 SPACECRAFT GS INTERPLANETARY SPACECRAFT PIONEER VENUS 2 TRANSPORTER ATMOSPHERIC TEMPERATURE PIONEER SPACE PROBES EARTH ATMOSPHERE BUS PIONEER 9 SPACE PROBE RT zPROBES . . IONOPAUSE UNMANNED SPACECRAFT LUNAR ATMOSPHERE SPACE PROBES NONGRAY ATMOSPHERES PIONEER 1 SPACE PROBE . . PIONEER SPACE PROBES ORGANIC SOLIDS GS INTERPLANETARY SPACECRAFT . . PIONEER 9 SPACE PROBE PLANETARY METEOROLOGY . PIONEER SPACE PROBES RT ,PROBES PLANETARY RINGS PLANETARY RlNGS

PLANETARY MANTLES PLANETARY ATMOSPHERES-(WNT.) PLANETARY EVOLUTION-(CONT.) PLANETARY GEOLOGY GS PLANETARY MANTLES PRIMITIVE EARTH ATMOSPHERE . EARTH MANTLE RADIATIVE TRANSFER PROTOPLANETS STELLAR woLunoN RT CRUSTS RADIO OCCULTATION LITHOSPHERE SATELLITE ATMOSPHERES LUNAR MANTLE SATURN RlNGS PLANETARY EXPLORATION PLANETARY CRUSTS SOLAR PLANETARY INTERACTlONS USE SPACE EXPLORATION

PLANETARY BASES PLANETARY MAPPINQ PLANETARY EXPLORER GS MAPPING RT EXTRATERRESTRIAL RESOURCES USE OUTER PLANETS EXPLORERS PLANETARY MAPPING SPACE EXPLORATION . RT ASTROGRAPHY STATIONS PLAmTARY QEOLOQY HEAT CAPACITY MAPPING MISSION THERMAL MAPPING PLANETARY COMPOSITIOW GS- - PLANETARY QEOLOQY GS COMPOSITION (PROPERTY) . MARS VOLCANOES . PLANETARY COMPOSmON RT LUNAR GEOLOGY PLANETARY MhSS RT EARTH PLANETARY STRUCTURE PLANETARY CRATERS GS MASS GAS GIANT PLANETS PLANETARY CRUSTS . PLANETARY MASS JUPITER RlNGS PLANETARY EVOLUTION RT PROTOPLANETS SATURN RlNGS PLANETARY STRUCTURE SPACE EXPLORATION PLANETARY SURFACES PLANETARY METEOROLOGY STRUCTURAL PROPERTIES (GEOLOGY) PLNETOLOGY GS METEOROLOGY PLANETS , PLANETARY METEOROLOGY REMOTE SENSING PLANETARY CORES RT ATMOSPHERIC CIRCULATION SOLAR SYSTEM GS CORES ATMOSPHERIC PHYSICS -. SPACE EXPLORATION . PLANETARY CORES JUPITER ATMOSPHERE . . EARTH CORE MARS ATMOSPHERE RT LUNAR CORE PLANETARY- - GRAVITATION MERCURY ATMOSPHERE PLANETS GS GRAVITATION PLANETARY ATMOSPHERES STELLAR CORES . PLANETARY QRAVITATION PLANETOLOGY RT ESCAPE VELOCITY PLANETS PUNETARY CRATER$ LUNAR GRAVITATION VENUS ATMOSPHERE GS CRATERS . PLANETARY CRATERS PLANETARY IONOSPHERES PLANETARY MOTION . .. MARS CRATERS SN (EXCLUDES EARTH IONOSPHERE) USE SOLAR ORBITS . RT EARTH (PLANET) GS ENVIRONMENTS IMPACT DAMAGE . EXTRATERRESTRIAL-. ENVIRONMENTS PLANETARY NEBULAE MARS (PLANET) . . PLANETARY ENVIRONMENTS GS CELESTIAL BODIES MARS SURFACE . . . PLANETARY ATMOSPHERES . NEBULAE MERCURY (PLANET) . . . PLANETARY IONOSPHERES . . PLANETARY NEBULAE MERCURY SURFACE RT =ATMOSPHERES RT ORION NEBULA METEORITE CRATERS m IONOSPHERES PLANETARY GEOLOGY JUPITER ATMOSPHERE PLANETS PLANETARY ORBITS MAGNETOSPHERE-IONOSPHERE GS ORBITS VENUS (PLANET) COUPLING VENUS SURFACE . PLANETARY ORBITS MARS ATMOSPHERE RT AMOR ASTEROID NEPTUNE ATMOSPHERE AWLLO ASTEROIDS PLANETARY CRUSTS SATURN ATMOSPHERE CHARON GS CRUSTS URANUS ATMOSPHERE CIRCULAR ORBITS , PLANETARY CRUSTS VENUS ATMOSPHERE EARTH ORBITS . . EARTH CRUST ELLIPTICAL ORBITS RT LUNAR CRUST ' EOUATORIAL ORBITS PLANETARY GEOLOGY PLANETARY LANDING INTERPLANETARY TRAJECTORIES PLANETARY MANTLES SN (EXCLUDES LANDING ON THE PLANET EARTH) ORBITAL RESONANCES (CELESTIAL GS LANDING MECHANICS) PLANETARY ENTRY , SPACECRAFT LANDING PARKING ORBITS USE ATMOSPHERIC ENTRY . . PLANETARY LANDING POLAR ORSITS RT CRASH LANDING SATELLITE ORBITS PLANETARY ENVIRONMENTS GLIDE LANDINGS SPACECRAFT ORBITS SN (EXCLUDES EARTH) HARD LANDING SWINGBY TECHNIQUE GS ENVIRONMENTS HORIZONTAL SPACECRAFT LANDING TRANSFER ORBITS . EXTRATERRESTRIAL ENVIRONMENTS INTERPLANETARY FLIGHT TWENTY-FOUR HOUR ORBITS . . PLANETARY ENVIRONMENTS LUNAR LANDING VIKING ORBITER SPACECRAFT . . . MARS ENVIRONMENT MARS LANDING . . . . MARS ATMOSPHERE ORBITAL MECHANICS PLANETARY QUAKES . PLANETARY ATMOSPHERES . . ROVING VEHICLES RT EARTHQUAKES . . . HELIUM HYDROGEN SOFT LANDING GEODYNAMICS ATMOSPHERES WATER LANDING MOONQUAKES . . . . JUPITER ATMOSPHERE SEISMIC WAVES . . . . MARS ATMOSPHERE SHOCK WAVES . . . . MERCURY ATMOSPHERE PLANETARY UMB . . . . NEPTUNE ATMOSPHERE RT EARTH LlMB PLANETARY RADIATION . . . PLANETARY IONOSPHERES =LIMBS SN (EXCLUDES TERRESTRIAL RADIATION1 . . . PLUTO ATMOSPHERE LUNAR LlMB . . . . SATURN ATMOSPHERE SOLAR LlMB GS ELECTROMAGNETIC RADIATION . . . . URANUS ATMOSPHERE . PLANETARY RADIATION . . . VENUS ATMOSPHERE EXTRATERRESTRIAL RADIATION . PLANETARY MAQNETIC FIELDS PLANETARY RADIATION . . . . . VENUS CLOUDS GS MAGNETIC FIELDS . . PLANETARY MAGNETOSPHERES RT ALBEDO . . PLANETARY MAQNETIC FIELDS DECIMETER WAVES RT AEROSPACE ENVIRONMENTS RT GEOMAGNETIC TAIL BIOASTRONAUTICS INFRARED RADIATION GEOMAGNETISM LIGHT (VISIBLE RADIATION) EXOBIOLOGY PLANETARY MAGNETOSPHERES LIFE SUPPORT SYSTEMS r RADIATION POLAR CUSPS RADIO WAVES LONG DURATION SPACE FLIGHT SOLAR PLANETARY INTERACTIONS SATURN ATMOSPHERE LUNAR ENVIRONMENT TERRESTRIAL RADIATION PLANETS THERMAL RADIATION PROTOPLANETS PLANETARY MAGNETOSPHERES VLF EMISSION RECORDERS TERRESTRIAL PLANETS GS ENVIRONMENTS THERMAL ENVIRONMENTS EXTRATERRESTRIAL ENVIRONMENTS . PLANETARY ENVIRONMENTS PLANETARY RlNGS PLANETARY EVOLUTION PLANETARY MAGNETOSPHERES GS CELESTIAL BODIES PLANETARY RlNGS UF PLANET ORIGINS RT EARTH MAGNETOSPHERE JUPITER RlNGS GS EVOLUTION (DEVELOPMENT) m MAGNETOSPHERES . PLANETARY EVOLUTION PLANETARY MAGNETIC FIELDS SATURN RlNGS URANUS RlNGS RT COSMOLOGY SOLAR PLANETARY INTERACTIONS PLANETARY ROTATION PLASMAPAUSE-(WNZ)PLASMAS (PHYSICS) PUNWRY RI-(WNZ) PUN~(CONZ) . . . VENUS (PLANEI) RT PLANETARY ATMOSPHERES SOLAR WlND PLANETS RT CELESTIAL MECHANICS m RlNGS CHIRON ECUPTlC PLASMAS (PHYSICS) JUPITER RED SPOT SN (LIMITED TO COMPLETELY IONIZED PLANETARY ROTATION NATURAL SATELUTES MATTER: FOR PARTIALLY IONIZED GS GYRATION PLANET EPHEMERIDES GASES SEE IONIZED GASES) . ROTATION UF ELECTROSTATIC PLASMA PLANETARY ROTATION PLANETARY CORES . . PLANETARY CRATERS IONIZED PLASMAS RT ASTROPHYSICS P~ANEFARYENVIRONMENTS MAGNETOIONIC PLASMA PLANETOCOGY MAGNETOPLASMAS ROTATING BODIES PUNETARY GEOLOQY PLANETARY METEOROLOGY PMMOIDS STELLAR ROTATION PLANETARY RlNGS GS PARTtCLES PaOTOPLANETS . CHARGED PARTICLES PLANETARY SATELLITES SATURN RlNGS . . ENERGETIC PARTICLES USE NATURAL SATELUTES SOLAR SYSTEM . . . PLASMAS (PHYSICS) Sl'Y . . . . ARGON PLASMA PLANETARY SPACE FLIGHT . . . . BETA PARTICLES USE INTERPLANETARY FLIGHT . . . . BOUNDARY LAYER PLASMAS PLANISPHERES . . . COLD PLASMAS GS MAPS . . . . . COLLlSlONAL PLASMAS PLANETARY SPACECRAFT , ASTRONOMICAL MAPS USE INTERPLANETARY SPACECRAFT PLANISPHERES . . . . STRONGLY COUPLED PLASMAS . . . . . COLLISIONLESS PLASMAS RT ASTRONOMICAL COORDINATES . PLANETARY STRUCTURE CELESTIAL SPHERE . . . . COSMIC PLASMA AT CHEMICAL COMPOSITION CONrnLLATIONS . . . . CYLINDRICAL PLASMAS EARTH PLANETARY STRUCTURE POLAR COORDINATES . . . . DENSE PLASMAS JUPITER RlNGS . . . . . PLASMA FOCUS LUNAR MANTLE . . . . . STRONGLY COUPLED PLASMAS PLASYI ACCELERATION PLANETARY GEOLOGY . . . . ELECTRON PLASMA UF MAGNETOHYDRODYNAMIC . . . . ELLIPTICAL PLASMAS PLANETOLOGY ACCELERATION URANUS RlNGS . . . . HELIUM PLASMA GS RATES (PER TIM@ . . . . HIGH TEMPERATURE PLASMAS . ACCELERATION (PHYSICS) . . . . HYDROGEN PLASMA PLANETARY SURFACES . . PLASMA ACCELERATION GS PLANETARY SURFACES . . . . . DEUTERIUM PLASMA RT mACCELERATION . . . LASER PLASMAS . MARS SURFACE PARTICLE ACCELERATION . . MERCURY SURFACE . . . . METALLIC PLASMAS PLASMAS (PHYSICS) . CESIUM PLASMA . VENUS SURFACE WAVE PROPAGATION . . . . RT EARTH SURFACE . . . . MICROPLASMAS JUPITER RED SPOT . . . . NITROGEN PLASMA PLASMA ARCS PLANETARY GEOLOGY . . . . NONEQUlLlBRlUM PLASMAS USE PLASMA JETS ROVING VEHICLES . . . . NONUNIFORM PLASMAS SATURN RlNGS . . . . OXYGEN PLASMA SURFACE PROPERTIES PLASMA CLOUDS -. . . . . RAREFIED PLASMAS x SURFACES GS PARTICLES . . . . RELATIVISTIC PLASMAS TOPOGRAPHY . CHARGED PARTICLES . . . . ROTATING PLASMAS . . PLASMA CLOUDS * . . . . SEMICONDUCTOR PLASMAS . . . MAGNETIC CLOUDS PLANETARY SYSTEMS . . . . SPACE PLASMAS RT CHEMtCAL CLOUDS . . . . . SOLAR WlND GS PLANETARY SYSTEMS mCLOUDS SOLAR SYSTEM . . . . . STELLAR WINDS . COSMIC PLASMA RT EXTRASOLAR PLANETS . . . . SPHERICAL PLASMAS EARTH MAGNETOSPHERE . . . . THERMAL PMSMAS ORBITAL RESONANCES (CELESTIAL GEOMAGNETIC HOLLOW MECHANICS) . . . . TOROIDAL PLASMAS HYDROGEN CLOUDS m SYSTEMS RT ALPHA PLASMA DEVICES INTERPLANETARY MEDIUM BEAM PLASMA AMPLIFIERS ION SHEATHS BLACKOUT (PROPAGATION) PLANETARY TEMPERATURE PLASMAPAUSE CHEMICAL ELEMENTS GS TEMPERATURE PLASMAS (PHYSICS) COMBUSTION PHYSICS . PLANETARY TEMPERATURE CORE FLOW RT ATMOSPHERIC TEMPERATURE SATURN RlNGS PLASMA DISCHAROES CYCLOPS PLASMA ACCELERATOR USE USMA JETS DEBYE LENGTH DEUTERON IRRADIATION PLANETESIMALS DEUTERONS USE PROTOPLANETS PLASMA JETS UF PLASMA ARCS DUOPLASMATRONS PLASMA DISCHARGES ELECTRIC ARCS PLANETOCENTRIC COORDINATES GS PARTICLES ELECTRON ENERGY GS COORDINATES . CHARGED PARTICLES GASES . PLANETOCENTRIC COORDINATES . . PLASMA JETS HIGH TEMPERATURE FLUIDS . . GEOCENTRIC COORDINATES . . . RADIO JETS (ASTRONOMY) IONIZED GASES RT ASTRONOMICAL COORDINATES RT mARCS IONS CELESTIAL REFERENCE SYSTEMS CROSSED FIELD GUNS KELVIN-HELMHOLTZ INSTABILITY SPHERICAL COORDINATES DROP TRANSFER LANDAU FACTOR ELECTRON BEAMS LASER FUSION PLANETOLOGY ELECTRON BOMBARDMENT LASER PLASMA INTERACTIONS RT JUPITER RlNGS FLUID JETS LIGHT IONS PLANETARY GEOLOGY ION INJECTION LlOUVlLLE EQUATIONS PLANETARY METEOROLOGY mJETS LOW DENSITY RESEARCH PLANETARY ROTATION LOW DENSITY WlND TUNNELS MAGNETIC COMPRESSION PLANETARY STRUCTURE MAGNETIC LENSES MAGNETOHYDRODYNAMIC FLOW SATURN RlNGS PLASMA TORCHES TERRESTRIAL PLANETS PLASMAS (PHYSICS) PLASMATRONS MICROWAVE PLASMA PROBES PLANETS PULSE DlFFRACTlCN ONSAGER PHENOMENOLOGICAL GS CELESTIAL BODIES RELATIVISTIC ELECTRON BEAMS PLANETS RELATIVISTIC PLASMAS COEFFICIENT EXTRASOLAR PLANETS TOROIDAL DISCHARGE z PHYSICS PLASMA ACCELERATION . . GAS GIANT PLANETS VAPOR JETS JUPITER (PLANET) PLASMA ACCELERATORS NEPTUNE (PLANET) PLASMAPAUSE PLASMA ARC CUTTING SATURN (PLANET) SN (LIMITED TO EARTH'S ATMOSPHERE) PLASMA ARC WELDING URANUS (PLANET) RT COSMIC PLASMA PLASMA CHEMISTRY PLUTO (PLANET) EARTH MAGNETOSPHERE PLASMA CLOUDS TERRESTRIAL PLANETS IONOPAUSE PLASMA COMPOSITION EARTH (PLANET) PLASMA CLOUDS PLASMA COMPRESSION MARS (PLANET) PLASMA OSCILLATIONS PLASMA CONDUCTIVITY MERCURY (PLANET) PLASMA PHYSICS PLASMA CONTROL POSITION

PLUTO ATMOSPHERE WURIM~Y-(WNX) wns(PHYSICS~(WNZ) POLARIZATION WAVES) PLASMA COOLING & ENVIRONMENTS PLASMA CORE REACTORS . EXTRATERRESTRIAL ENVIRONMENTS PLASMA CURRENTS . . PLANETARY ENVIRONMENTS PLANETARY ATMOSPHERES cc POLARIUTION PLASMA CYLINDERS . . . SN (USE OF A MORE SPECIFIC TERM IS PLASMA DECAY . . . . PLUTO ATMOSPHERE RT PLUTO (PLANET) RECOMMENDEP-CONSUL T THE TERMS PLASMA DENSITY LISTED BELOW) PLASMA DIAGNOSTICS RT ANTIFERROELECTRICITY PLASMA DIFFUSION POINT SOURCES BIPOLARITY PLASMA DIODES GS RADIATION SOURCES LINEAR POLARIZATION PLASMA DISPLAY DEVICES . POINT SOURCES MAGNETIZATlON PLASMA DRIFT RT DIFFUSE RADIATION OVERHAUSER EFFECT PLASMA DYNAMICS -ENERGY SOURCES PHOTOELASTIC ANALYSIS PLASMA ENGINES HUYGWS PRINCIPLE POLARIZATION (CHARGE SEPARATION) PLASMA EWIUBRIUM LIGHT SOURCES POLARIZATION (SPIN ALIGNMENT) PZMAETCHING SPHERICAL WAVES POLARlZATlON (WAVES) PLASMA FLUX MEASUREMENT POLARIZED RADIATION PLASMA FREQUENCIES POLAR AURORAS PLASMA GENERATORS USE AURORAS PLASMA GUNS POLARIZED ELECTROMAGNETIC RADIATION P~ASMAHEATING POLAR CAP ABSORPTION GS ELECTROMAGNETIC RADIATION PLASMA INTERACTION EXPERIMEN GS ENERGY ABSORPTION . POLARIZED ELECTROMAGNETIC PLASMA INTERACTIONS . RADIATION ABSORPTION RADIATION PLASMA JET SYNTHESIS . . ELECTROMAGNETIC ABSORPTION . . POLARIZED LlGHT PLASMA JET WIND TUNNELS . . . POLAR CAP ABSORPTION . . SYNCHROTRON RADIATION PLASMA JETS . THERMAL ABSORPTION POLARIZED RADIATION PLASMA LAYERS . . POUR CAP ABSORPTION . POLARIZED ELECTROMAGNETIC PIASMA UFETlME RT mABSORPllON RADIATION P~MALOSS . . POLARIZED UGHT PLASMA OSCILLATIONS POLAR CAPS . . SYNCHROTRON RADIATION PLASMA PHYSICS RT ANTARCTIC REGIONS RT CROSS POLARlZATlON PLASMA PINCH ARCTIC REGIONS EXTRATERRESTRIAL RADIATION PLASMA POTENTIALS mCAPS FARADAY EFFECT PLASMA POWER SOURCES EARTH (PLANET) INFRARED RADIATION PLASMA PRESSURE Ibt.-- KERR &LS PLASMA PROBES MARS (PLANET) LlGHT (VISIBLE RADIATION) PLASMA PROPULSION LINEAR POLARIZATION PLASMA PUMPING LYMAN ALPHA RADIATION WLAR CUSPS PLASMA RADIATION LYMAN BETA RADIATION RT AERONOMY PLASMA RESONANCE MAGNETO-OPTICS PLASMA SHEATHS mCUSPS MONOCHROMATIC RADIATION EARTH MAGNETOSPHERE POLARIZATION (WAVES) PLASMA SLABS GEOMAGNETIC LATITUDE POLARIZERS PLASMA SPECTRA GEOMAGNETIC TAIL PLASMA SPRAYING mRADIATION GEOMAGNETISM PLASMA TEMPERATURE RADIATIVE TRANSFER GEOPHYSICS PLASMA TORCHES INTERPLANETARY SPACE RADIO WAVES PLASMA TURBULENCE STELLAR RADIATION LINES OF FORCE PLASMA WAVES ULTRAVIOLET RADIATION MAGNETIC FIELD CONFIGURATIONS PLASMA-ELECTROMAGNETIC MAGNETIC FIELDS INTERACTION MAGNETOPAUSE PLASMA-PARTICLE INTERACTIONS POLARIZED UGHT PLANETARY MAGNETIC FIELDS PLASMADYNAMIC LASERS GS ELECTROMAGNETIC RADIATION POLAR REGIONS PLASMAGUIDES . LlGHT (VISIBLE RADIATION) SPACE PLASMAS PLASMAPAUSE . . POLARIZED LIGHT PLASMASPHERE . POLARIZED ELECTROMAGNETIC PLASMATRONS POLAR REGIONS RADIATION RADIATION BELTS UF HIGH LATITUDES . . POLARIZED UGHT RAREFIED GAS DYNAMICS GS REGIONS POLARIZED RADIATION SCY LLA . POLAR REGIONS . . POLARIZED ELECTROMAGNETIC SOLAR PHYSICS . . ANTARCTIC REGIONS RADIATION SPACE CHARGE . . . MCMURDO SOUND . . POLARIZED LlGHT SPHINX . . . ROSS ICE SHELF RT GEGENSCHEIN STELLAR MAGNETIC FIELDS . . ARCTIC REGIONS KERR MAGNETOOPTICAL EFFECT TEARING MODES IPLASMAS) RT AURORAL ZONES MONOCHROMATIC RADIATION THERMAL DISSOCIATION . CLIMATOLOGY OPTICAL ACTIVITY THERMODYNAMICS GEOGRAPHY OPTICAL DEPOLARIZATION THERMONUCLEAR REACTIONS PERMAFROST OPTICAL POLARIZATION TWO STAGE PLASMA ENGINES POLAR CUSPS PHOTOELASTICITY TEMPERATE REGIONS ZODIACAL LlGHT TIMBERLINE PLASMASPHERE RT ATMOSPHERIC IONIZATION POLARIZED RADIATION CHEMOSPHERE POLARIMETERS GS POLARIZED RADIATION EARTH ATMOSPHERE UF SPECTROPOLARIMETERS POLARIZED ELASTIC WAVES EARTH MAGNETOSPHERE GS MEASURING INSTRUMENTS . POLARIZED ELECTROMAGNETIC OPTICAL MEASURING INSTRUMENTS OPEN PROJECT . RADIATION PLASMAS (PHYSICS) . . POLARIMETERS . . POLARIZED LlGHT UPPER ATMOSPHERE OPTICAL EQUIPMENT . . SYNCHROTRON RADIATION . OPTICAL MEASURING INSTRUMENTS RT CAUSTICS lOPTlCSl . . POLARIMETERS ELASTIC WAVES ' PLASMOIDS RT CHEMICAL ANALYSIS USE PLASMAS (PHYSICS) ELECTROMAGNETIC RADIATION ELLIPSOMETERS EXTRATERRESTRIAL RADIATION OPTICAL MEASUREMENT LINEAR POLARIZATION PLEIADES CLUSTER PHOTOMETERS PLASMA RADIATION GS CELESTIAL BODIES POLARIMETRY rPOLARlZATlON . STAR CLUSTERS POLARISCOPES POLARIZATION CHARACTERISTICS POLARIZERS . . OPEN CLUSTERS r RADIATION . . . PLEIADES CLUSTER POLAROGRAPHY r RAYS RT xCLUSTERS SOLAR MAXIMUM MISSION TAURUS CONSTELLATION POLARIMETRY r POSITION PLUTO (PLANET) GS OPTICAL MEASUREMENT SN (USE OF A MORE SPECIFIC TERM IS GS CELEST!AL BODIES POLARIMETRY RECOMMENDED--CONSULT THE TERMS PLANETS RT OPTICAL ACTIVITY LISTED BELOW) . . PLUTO (PLANET) OPTICAL MEASURING INSTRUMENTS RT AlTITUDE (INCLINATION) RT CHARON PHOTOMETRY POSITION (LOCATION) PLUTO ATMOSPHERE POLARIMETERS POSITION (TITLE) POSITION (LOCATION)

PRIMARY COSMIC RAYS-(CONT) PROTON DENSITY (CONCENTRATION)-(CONT) WSmOIl (LOC*TK)W) . . . PROTON DENSITY UF LOCALIZATION GS EXTRATERRESTRIAL RADIATION (CONCENTRATION) LOCATION . PRIMARY COSMIC RAYS MAGNETOSPHERIC PROTON GS POSITION (LOCATION) . . SOLAR COSMIC RAYS . . . . DENSITY . SOLAR POSITION IONIZING RADIATION RT ALTITUDE . COSMIC RAYS RT ATMOSPHERIC DENSITY ASTROLABES . . PRIMARY COSMIC RAYS ATOM CONCENTRATION AZIMUTH . . . SOLAR COSMIC RAYS PLASMA DENSITY BEARING (DIRECTION) PARTICLES SPACE DENSITY CBWTING . CORPUSCULAR RADIATION COUOCATION . . PRIMARY COSWlC RAYS PROTON FLUX BENSITY COORDINATES . . . SOLAR COSMIC RAYS St4 (LIMITED TO PROTON EMISSION OR DETECTION RT COSMIC RAY ALBEW DETECTlON RATE PER UNIT AREA) DISTANCE HEAW NUCLEI GS-- RATES (PER TIME) EPHEMERIDES SECONDARY COSMIC RAYS . FLUX ~ENSITY. EXPOSURE . . RADIANT FLUX DENSITY FIXING PRIMITIVE EARTH ATMOSPHERE . . . PARTICLE FLUX OENSIW GEOMETRY GS EARm ATMOSPHERE . . . . PROTON FLUX DENSITY LATITUDE . PRIMITIVE URTn ATUIOSPHERE RT IRRADIANCE LONGITUDE RT mATMOSPHERES RADIANCY MISALIGNMENT ATMOSPHERIC COMPOSITION RADIATION COUNTERS NAVIGATION ATMOSPHERIC ELECTRICITY SOLAR FLUX DENSITY ORBITAL POSITION ESTIMATION ATMOSPHERIC MODELS mORlENTATlON EARTH PLANETARY STRUCTURE PROTON IRRADIATION mPOINTS FREE ATMOSPHERE GS IRRADIATION POSITION ERRORS PLANETARY ATMOSPHERES . ION IRRADIATION POSITION SENSING . . PROTON IRRADIATION POSITIONING PROJECT sm AT DEUTERON IRRADIATION RADAR BEACONS UF SEARCH FOR EXTRATERRESTRIAL ELECTRON RADIATION sms INTELLIGENCE SOUND RANGING SET1 PROTON TELESCOPES SPATIAL DISTRIBUTION GS PROGRAMS USE PARTICLE TELESCOPES SPHERICAL COORDINATES . NASA PROGRAMS STATIONS . . NASA SPACE PROGRAMS PROTON-PROTON REACTIONS SURVEYS . . . PROJECT sm GS NUCLEAR REACTIONS TRACKING (POSITION) . PROJECTS , PROTON-PROTON REACTIONS . . PROJECT sm RT ANNIHILATION REACTIONS POWER DENSITY (ELECTROMAONETIC) . SPACE PROGRAMS m INTERACTIONS USE RADIANT FLUX DENSITY . . NASA SPACE PROGRAMS POMERONS . . . PROJECT SET1 THERMONUCLEAR REACTIONS POYNTINEROBERTSON EFFECT RT EXTRATERRESTRIAL INTELLIGENCE RT =EFFECTS RADIO COMMUNICATION PROTONS MlCROMETEOROlDS RADIO SIGNALS GS PARTICLES ORBITAL MECHANICS CHARGED PARTICLES RADIATION EFFECTS PROMINENCES . . PROTONS ZODIACAL DUST GS PROMINENCES . . . RECOIL PROTONS ZODIACAL LIGHT . SOLAR PROMINENCES . . . SOLAR PROTONS RT SOLAR ACTIVITY . ELEMENTARY PARTICLES PRAESEPE STAR CLUSTERS . . FERMIONS GS CELESTIAL BODIES PROPAGATION VELOCITY . . . PROTONS . STAR CLUSTERS GS RATES (PER TIME) . . . . RECOIL PROTONS . .-OPEN CLUS~ERS . PROPAGATION VELOCm . . . . SOLAR PROTONS . . . PRA-PE STAR CLUSTERS VELOCITY RT ALPHA PARTICLES STARS . PROPAGATION VELOCITY ANTIPROTONS . . PRAESEPE STAR CLUSTERS RT ELECTROMAGNETIC RADIATION BARYONS RT -oCLUSTERS GROUP VELOCITY COSMIC RAYS PHASE VELOCITY DEUTERONS PRE-MAIN SEOUENCE STARS PROPAGATION MODES FLUX DENSITY GS CELESTIAL BODIES WAVE PROPAGATION HYDROGEN IONS . STARS IONS . .-PROTOSTARS PROPORTIONAL COUNTERS NUCLEAR PARTICLES . . . PRE-MAIN SEOUENCE STARS GS IONIZATION CHAMBERS NUCLEI (NUCLEAR PHYSICS) . . . . T TAURI STARS . PROPORTIONAL COUNTERS NUCLEON POTENTIAL RT MAIN SEQUENCE STARS MEASURING INSTRUMENTS NUCLEONS STAR FORMATION . COUNTERS POSITIVE IONS STELLAR EVOLUTION . . RADIATION COUNTERS . . . PROPORTIONAL COUNTERS PRECESSION , RADIATION MEASURING INSTRUMENTS GS GYRATION . . RADIATION COUNTERS . PRECESSION . . . PROPORTIONAL COUNTERS PROTOPLANETS LARMOR PRECESSION RT DOSIMETERS UF PLANETESIMALS PROTON PRECESSION GEIGER COUNTERS GS CELESTIAL BODIES QUENCHING (ATOMIC PHYSICS) NEUTRON COUNTERS PROTOPLANETS RT EARTH ORIENTATION RT COSMOLOGY GYROSCOPES PROSPECTINa PLANETARY ENVIRONMENTS GYROSCOPIC STABILITY USE EXPLORATION PLANETARY EVOLUTION LARMOR RADIUS PLANETARY MASS LIBRATION PROTON BELTS PLANETS MUON SPIN ROTATION GS PARTICLES SOLAR ORBITS NUTATION . CHARGED PARTICLES SOLAR SYSTEM POLAR WANDERING (GEOLOGY) . . MAGNETICALLY TRAPPED PARTICLES STELLAR EVOLUTION ROTATION . . . RADIATION BELTS VORTEX PRECESSION . . . . PROTON BELTS PROTOSTARS . TRAPPED PARTICLES GS CELESTIAL BODIES PRIBRAM METEORITE . . MAGNETICALLY TRAPPED PARTICLES STARS GS CELESTIAL BODIES . . . RADIATION BELTS PROTOSTARS METEORITES . . . . PROTON BELTS . . . PRE-MAIN SEOUENCE STARS . . STONY METEORITES RT *BELTS T TAURI STARS . . CHONDRITES INNER RADIATION BELT AT STAR FORMATION . . . . PRIBRAM METEORITE OUTER RADIATION BELT STELLAR EVCILUTION RT BOLIDES STELLAR MASS ACCRETION METEOR TRAILS PROTON DENSITY (CONCENTRATION) GS DENSITY (NUMBERIVOLUME) PTOLEMAEUS CRATER PRIMARY COSMIC RAYS . PARTICLE DENSITY (CONCENTRATION) GS CRATERS UF HEAVY COSMIC RAY PRIMARIES . . ION DENSITY (CONCENTRATION) . LUNAR CRATERS RADIANT FLUX DENSITY

PTOLEMAEUS CRATUI-(CON~) OUADRATURE~-(CON~) . . PTOLEMAEUS CRATER SPACE MECHANICS RT METEORITE CRATERS R CORONAE SOBEAUS STARS QUANTUM STATISTICS UF RCB STARS PULSARS UF BOSE-EINSTEIN STATISTICS GS CELESTIAL BODIES GS CELESTIAL BODIES RT BOSONS . STARS , RADlO SOURCES (ASTRONOMY) FERMI-DIRAC STATISTICS . . SUPERGIANT STARS RADlO STARS F~RMIONS . . . R CORONAE BOREALIS STARS . PULSARS MANY BODY PROBLEM . . VARIABLE STARS . STARS mSTATlSTlCS . . . IRREGULAR VARIABLE STARS . . NEUTRON STARS SUPERFLUlOlTY . . . . R CORONAE BOREAUS STARS ... WLS*RS THOHAS-FERMl MODEL RT CARBON STARS . . RADIO STARS COOL STARS ... PULSIRs DUST RT DEGENERATE MATTER WmTuu THEORY STELLAR ENVELOPES QUASARS UF WIGHTMAN THEORY STELLAR MASS EJECTION RADIATION SOURCES GS THEORETICAL PHYSICS RADlO ASTRONOMY . QUANTUM THEORY . . BOHR THEORY RADAR ASTRONOMY RADlO BURSTS GS ASTRONOMY SUPERNOVA REMNANTS RT ANGULAR MOMENTUM ATOMIC THEORY . RADAR ASTRONOMY CHARM (PARTICLE PHYSICS) RT RADlO ASTRONOMY PULSED RADIATION DE BROGLIE WAVELENGTHS GS PULSED RADIATION DlRAC EQUATION RADAR MAPS ELECTROMAGNETIC PULSES ELEMENTARY PARTICLES GS MAPS . . SYSTEM GENERATED EMISSION . RADAR MAPS ELECTROMAGNETIC PULSES ENERGY LEVELS RT MAP MATCHING GUIDANCE RT CONTINUOUS RADIATION FIELD THEORY (PHYSICS) METEOROLOGICAL CHARTS CORPUSCULAR RADIATION FLAVOR (PARTICLE PHYSICS) RADAR IMAGERY Eusnc WAVES FORBIDMNTRANSITIONS ELECTROMAGNETIC RADIATION GROUND STATE RADIAL VELOCtTY GAMMA RAY LASERS HAMlLTONlAN FUNCTIONS GS RATES (PER TIME) LASER DAMAGE KLEIN-WNHAM POTENTIAL . RADIAL VELOCITY LASERS MAGNETIC MONOPOLES VELOCITY PICOSECOND PULSES MANDELSTAM REPRESENTATION . RADIAL VELOCITY PULSE AMPLITUDE MOLECULAR ORBITALS RT ASTRONOMICAL SPECTROSCOPY PULSE DIFFRACTION NUCLEAR PHYSICS WPPLER EFFECT WLSE DURATION NUCLEAR SPIN RADAR TARGETS PULSE GENERATORS PARITY RED SHIFT PULSE MOWLATlON PERTURBATION THEORY VELOCITY MEASUREMENT PULSE RATE PHOTONS r RADIATION PHYSICAL OPTICS r RAYS RADIANCE PLANCKS CONSTANT SN (DIRECTIONAL EMISSION RATE PER QUANTUM ELECTRONICS UNlT AREA OF RADIATION) PYRANOMETERS QUANTUM OPTICS GS ELECTROMAGNETIC PROPERTIES GS MEASURING INSTRUMENTS mRADlATlON . OPTICAL PROPERTIES . RADIATION MEASURING INSTRUMENTS RADIATION LAWS . . RADIANCE . . ACTINOMETERS SCHUMANN-RUNGE BANDS RATES (PER TIME) . . . PYRANOMETERS SQUEEZED STATES (QUANTUM THEORY) . FLUX DENSITY AT PHOTOMETERS STATISTICAL DISTRIBUTIONS . . RADIANT FLUX DENSITY RADIOMETERS STATISTICAL MECHANICS . . . RADIANCE SKY RADIATION STRING THEORY RT BLACK BODY RADIATION SUPERGRAVITY BRIGHTNESS PYROHEUOMETERS- -- - SUPERSYMMETRY EMlSSlVlTY UF HEL~~METRY m THEORIES EMIITANCE GS MEASURING INSTRUMENTS WAVE EQUATIONS GLARE . HELIOMETERS INCANDESCENCE . . PYROHEUOMETERS QUASARS m INTENSITY OPTICAL EQUIPMENT UF QSO (RADIO SOURCES) IRRADIANCE . HELIOMETERS QUASI-STELLAR RADlO SOURCES LUMENS . . PYROHEUOMETERS GS CELESTIAL BODIES LUMINOSITY TELESCOPES . RADlO SOURCES (ASTRONOMY) NEUTRON FLUX DENSITY . HELIOMETERS . . QUASARS SOLAR FLUX DENSITY . . PYROHELIOMETERS RT ACTIVE GALACTIC NUCLEI TRANSMISSOMETERS ACTIVE GALAXIES VISIBILITY EXTRAGALACTIC RADlO SOURCES GALAXIES RADIANCY GRAVITATIONAL COLLAPSE SN (EMISSION RATE PER UNlT AREA OF IRREGULAR GALAXIES RADIATION) PULSARS GS RATES (PER TIME) QSO (RADIO SOURCES) RADlO ASTRONOMY FLUX DENSITY USE QUASARS RADlO BURSTS . . RADIANT FLUX DENSITY RADlO EMISSION . . . RADIANCY QUADRANTID METEOROIDS RADlO GALAXIES RT ELECTRON FLUX DENSITY GS CELESTIAL BODIES RADlO JETS (ASTRONOMY) ILLUMINANCE . METEOROID SHOWERS RADlO STARS LUMINOUS INTENSITY . . QUADRANTID METEOROIDS STARS NEUTRON FLUX DENSITY . METEOROIDS X RAY SPECTRA PARTICLE FLUX DENSITY QUADRANTID METEOROIDS PROTON FLUX DENSITY SOLAR FLUX DENSITY QUASAT QUADRANTS SN (QUASAR SATELLITE) GS GEOMETRY RADIANT ENERGY GS OBSERVATORIES USE RADIATION . EUCLIDEAN GEOMETRY . ASTRONOMICAL OBSERVATORIES . . ANALYTIC GEOMETRY . . ASTRONOMICAL SATELLITES . . . QUADRANTS . . . QUASAT RADIANT FLUX DENSITY SN (DYNES/CM-SEC AS DISTINGUISHED RT EUROPEAN SPACE PROGRAMS QUADRATURE APPROXIMATION NASA PROGRAMS FROM RADIATION PRESSURE-DYNES/SQ CM) USE QUADRATURES RADlO ASTRONOMY UF POWER DENSITY (ELECTROMAGNETIC) RADlO TELESCOPES RADIANT INTENSITY QUADRATURES SPACEBORNE ASTRONOMY RADIATION INTENSITY UF QUADRATURE APPROXIMATION VERY LONG BASE INTERFEROMETRY RT CIRCULAR ORBITS GS RATES (PER TIME) ORBIT CALCULATION FLUX DENSITY ORBITAL MECHANICS QUASI-STELLAR RADlO SOURCES RADIANT FLUX DENSITY ORBITS USE QUASARS IRRADIANCE RADIANT HEATING

RAW FLUX om-(WNZ) RAOIATION-(WNZ) RAOIATION-(WNZ) . . . . ILLUMINANCE GRAVITATIONAL WAVES ULTRAVIOLET RADfATlON . . . . SOLAR CONSTANT HARMONIC RADIATION VOLTERRA EQUATIONS . . . LUMENS HEATING . . . LUMINOUS INTENSITY INCIDENT RADIATION INFRARED RADIATION . . . . ILLUMINANCE RADIATION BELTS INNER RADIATION BELT . . . . LUMINANCE UF GEOMAGNETICALLY TRAPPED INTERSTELLAR RADIATION . . . PARTICLE FLUX DENSITY PARTICLES ION CYCLOTRON RADIATION . . . . ELECTRON FLUX DENSITY VAN AUEN RADIATION BELTS . . . . NEUTRON FLUX DENSITY IONIZING-RADIATION GS PARTICLES IRRADIATION . . . . PROTON FLUX DENSITY CHARGED PARTICLES KIRCHHOFF LAW RAMATION . . . . RADIANCE OF MAGNEllCAUY TRAPPED PARTICLES LIGHT (VISIBLE RADIATION) . . . . . RADIANCY . . . RAMITION BELTS . . . SOW FLUX DENSITY LONG WAVE RADIATION . . . . ARTIFICIAL RADIATION BELTS . . . . SOLAR CONSTANT LONGKUWNAL WAVES . . . . INNER RADIATION BELT RT BL LACERTAE OBJECTS LUNAR RADIATION . OUTER RADIATION BELT LYMAN ALPHA RADIATION . . . BRIGHTNESS PROTON BELTS LYMAN BETA RADIATION . . . . BRIGHTNESS DISTRIBUTION CORPUSCULAR RADIATION MICROWAVES . WSIMETERS . RAMATION BELTS MODULATED CONTINUOUS RADIATION . EMlSSlVlTY TRAPPED PARTICLES MONOCHROMATIC RADIATION . EMllTANCE MAGNETICALLY TRAPPED PARTICLES NEAR INFRARED RADIATION . . FAR FIELDS RAMATION BELTS NEAR ULTRAVIOLET RADIATION . . . FLUX (RATE) . ARTIFICIAL RADIATION BELTS NONTHERMAL RADIATION . . . GAMMA RAY BURSTS . . . INNER RADIATION BELT NUCLEAR MEDICINE . LASER OUTPUTS OUTER RADIATION BELT NUCLEAR RADIATION . . . . LUMINOSITY PROTON BELTS NUCBN POTENTIAL . . . . MASER OUTPUTS RT AEROSPACE ENVIRONMENTS MASS TO LIGHT RATIOS OUTER RADIATION BELT PHOTONS m BELTS POST-BLAST NUCLEAR RADIATION COSMIC RAYS PLANE WAVES o RADIATION EARTH ATMOSPHERE PLANETARY RADIATION RADIATION COUNTERS EARTH MAGNETOSPHERE PLASMA RADIATION RADIATION PRESSURE ELECTRON DENSITY (CONCENTRATION) POURIZED ELECTROMAGNETIC RADIO SPECTRA ELECTRON PRECIPITATION RADIATION SCAlTERlNG FUNCTIONS ELECTRON TRAJECTORIES SOLAR REFLECTORS POLARIZED RADIATION POST-BLAST NUCLEAR RADIATION ELECTRONS SOUND INTENSITY ELEMENTARY PARTICLES PULSED RADIATION VIEW EFFECTS ENTRAPMENT QUANTUM THEORY RADIANT FLUX DENSITY EXOSPHERE RAOIANT HEATINQ EXTRATERRESTRIAL RADIATION RADIANT HEATING UF RADIATION HEATING IONIZING RADIATION RADIATION ABSORPTION GS HEATING IONOSPHERIC DRIFT RADIATION BELTS . RADIANT HEATING MAGNETIC FIELDS RADIATION CHEMISTRY RT =ENERGY MIRROR POINT RADIATION COUNTERS GAS HEATING PLASMAS (PHYSICS) RADIATION DAMAGE x RADIATION PROTON PRECIPITATION RADIATION DETECTORS RADIATIVE HEAT TRANSFER PROTONS RADIATION DlSTRl+!TlON RADIATIVE TRANSFER m RADIATION RADIATION DOSAGE SOLAR HEATING SOLAR RADIATION RADIATION EFFECTS TRAPPING RADIATION HARDENING RAMANT INTENSITY RADIATION HAZARDS UPPER ATMOSPHERE USE RADIANT FLUX DENSITY RADIATION INJURIES RADIATION LAWS RADIATION COUNTERS m RADIATION RADIATION MEASUREMENT UF IONIZATION COUNTERS SN (USE OF A MORE SPECIFIC TERM IS RADIATION MEASURING INSTRUMENTS PARTICLE COUNTERS RECOMMENDEPCONSULT THE TERMS RADIATION METEOROID SPACECRAFT PARTICLE DETECTORS LISTED BELOW RADIATION PRESSURE GS MEASURING INSTRUMENTS UF RADIANT ENERGY RADIATION PROTECTION . COUNTERS RADIATION EMISSION RADIATION PYROMETERS . RADIATION COUNTERS RT ALPHA PARTICLES RADIATION SHIELDING ... CERENKOV COUNTERS ANTENNA RADIATION PATTERNS RADIATION SICKNESS . . . ELECTRON COUNTERS ARTIFICIAL RADIATION BELTS RADIATION SOURCES . . . GEIGER COUNTERS ATMOSPHERIC RADIATION RADIATION SPECTRA . . . NEUTRON COUNTERS BACKGROUND NOISE RADIATION THERAPY . . . . NEUTRON SPECTROMETERS BACKGROUND RADIATION RADIATION TOLERANCE . . . PARTICLE TELESCOPES BASE HEATING RADIATION TRANSPORT . . . PROPORTIONAL COUNTERS BEAMS (RADIATION) RADIATION TRAPPING . . . QUANTUM COUNTERS BLACK BODY RADIATION RADIATIVE TRANSFER . . . SCINTILLATION COUNTERS CERENKOV RADIATION RADIOACTIVITY . . . SPARK CHAMBERS CIRCUMSOLAR RADIATION RADIOLOGY RADIATION MEASURING INSTRUMENTS COHERENT ACOUSTIC RADIATION REFLECTED WAVES RADIATION COUNTERS COHERENT ELECTROMAGNETIC RELIC RADIATION CERENKOV COUNTERS RADIATION RESONANCE FLUORESCENCE ELECTRON COUNTERS COHERENT RADIATION SELF ABSORPTION GEIGER COUNTERS CONTINUOUS RADIATION SHORT WAVE RADIATION ... NEUTRON COUNTERS CORPUSCULAR RADIATION SILICON RADIATION DETECTORS . . . . NEUTRON SPECTROMETERS COSMIC RAYS SKY RADIATION . . . PARTICLE TELESCOPES CYCLOTRON RADIATION SOLAR CORPUSCULAR RADIATION . . . PROPORTIONAL COUNTERS DIFFUSE RADIATION SOLAR RADIATION . . . QUANTUM COUNTERS EARTH RADIATION BUDGET SOLAR RADIATION SHIELDING . . . SCINTILLATION COUNTERS EXPERIMENT SOLAR RADIATION 1 SATELLITE . . . SPARK CHAMBERS ELASTIC WAVES SOLAR RADIATION 3 SATELUTE RT BUBBLE CHAMBERS ELECTROMAGNETIC NOISE SOLAR WIND CHANNEL MULTiRlERS ELECTROMAGNETIC RADIATION SOUND WAVES CLOUD CHAMBERS ELECTRON RADIATION SPECTRAL EMISSION COINCIDENCE CIRCUITS EMISSION STANDING WAVES DOSIMETERS EXTRATERRESTRIAL RADIATION STELLAR RADIATION ELECTROSTATIC PROBES EXTREME ULTRAVIOLET RADIATION STOKES LAW OF RADIATION FLUENCE FALLOUT STRATOSPHERE RADIATION GAS DISCHARGE TUBES FAR INFRARED RADIATION SYNCHROTRON RADIATION HODOSCOPES FAR ULTRAVIOLET RADIATION TEMPERATURE EFFECTS ION TRAPS (INSTRUMENTATION) FLUX (RATE) TERRESTRIAL RADIATION IONIZATION CHAMBERS FLUX DENSITY THERMAL RADIATION IONIZING 'RADIATION GALACTIC RADIATION TRAP PROGRAM NUCLEAR EMULSIONS GAMMA RAYS TROPOSPHERIC RADIATION PARTICLE FLUX DENSITY GEOPHYSICS ULTRASONIC RADIATION PROTON FLUX DENSITY RADIO ASTRONOMY

RADIATION COUNTERS-(WNT) RmmnON MEASURING INSTRUMENTS-(CONK) RADIATION sou~c~s-(WNT) RADIANT FLUX DENSITY . . EBERT SPECTROMETERS ELECTRON SOURCES mRADIATION . . ELECTROSTATIC PROBES EXTRAGALACTIC RADlO SOURCES SPECTROMETERS . . FABRY-PEROT SPECTROMETERS mGENERATORS . . HOWSCOPES HEAT SOURCES RADIATION DETECTORS . . INFRARED INSTRUMENTS INTERSTELLAR MASERS GS MEASURING INSTRUMENTS . . . INFRARED Di3ECTORS ION SOURCES . RADIATION MEASURING INSTRUMENTS . . . . FUR DETECTORS LIGHT SOURCES . . RIDUTIONDETECTORS . . . INFRARED SCANNERS PULSARS . . . DOSIMETERS . . . INFRARED SPECTROMETERS m RADIATION . . . . THRESHOLD D€rECTORS . . . INFRARED SPECTROPHUTOMETERS RADIO SOURCES (ASTRONOMY) (DOSlM€ERS) . . PHOTOMEFERS RADIOACTIVE MAYERIALS . . . GOLAY DETECTOR CELLS . . . NCTROPHOTOMETERS SOUND GENERATORS . . . SILICON RADIATION DETECTORS . . . ULTRAVIOLET SPECTROMETERS ~SOURCES~ RT -DETECTORS . . . ULTRAVIOLET X RAY STARS GEIGER COUNTERS SPECTROPHOTOMETERS HEAL% PHYSICS . . RADIATION COUNTERS RADIATION SPECTRA MULTI-ANODE MICROCHANNEL ARRAYS . . . CERENKOV COUNTERS GS SPECTRA m RADIATION . . . ELECTRON COUNTERS . RADIATION SPECTRA SATELLITE-BORNE INSTRUMENTS . . . GEIGER COUNTERS . . ABSORPTION SPECTRA VELA SATELLITES ... NEUTRON COUNTERS . . . FRAUNHOFER LINES . . . . NEUTRON SPECTROMETERS . . . HERZBERG BANDS RADIATION DISTRIBUTION . . . PARTICLE TELESCOPES . . . TELLURIC LINES UF RADIATION FIELDS . . . PROPORTIONAL COUNTERS . . ELECTROMAGNETIC SPECTRA GS DISTRIBUTION (PROPERTY) . . . QUANTUM COUNTERS . . . GAMMA RAY SPECTRA . RADIATION DlSTRlEUTlON . . . SCINTILLATION COUNTERS . . . INFRARED SPECTRA . . ANTENNA RADIATION PATTERNS . . . SPARK CHAMBERS . . . LlNE SPECTRA . . . SIDELOBES . . RADIATION DETECTORS . . . . BALMER SERIES . . DIFFRACTION PATTERNS . . . DOSIMETERS . . . . D UNES THRESHOLD DETECTORS . . . KOSSEL--.-- PATTERN ...... ELECTRONIC SPECTRA . . . RAINBOWS (DOSIMETERS) . . . . FRAUNHOFER LINES RT CORPUSCULAR RADIATION . . . GOCAY DETECTOR CEUS . . . . H LINES ELASTIC WAVES . . . SILICON RADIATION DETECTORS . . . . . H ALPHA LlNE ELECTROMAGNETIC RADIATION . . RIOMETERS . . . . . H BETA LlNE FIELD THEORY (PHYSICS) RT mDETECTORS . . . . . H GAMMA UNE FLUX DENWN EARTH RADIATION BUDGET . . . . K LINES NULL ZONES EXPERIMENT . . . . LYMAN SPECTRA m PATERNS HEALTH PHYSICS . . . . PASCHEN SERIES a RADIATION IONIZATION CHAMBERS . . . . RYOBERG SERIES VERTICAL DISTRIBUTION MONITORS . . . . TELLURIC LINES WAVE DISPERSION NUCLEAR EMULSIONS . . . RADlO SPECTRA OPTICAL MEASURING INSTRUMENTS . . . . MICROWAVE SPECTRA m RADIATION RADIATION EMISSION . . . RAMAN SPECTRA SAFETY DEVICES USE RADIATION . . . STELLAR SPECTRA SOLAR INSTRUMENTS . . . . SOLAR SPECTRA VELA SATELUTES . . . UBV SPECTRA RADIATION FIELDS VIEW EFFECTS USE RADIATION DISTRIBUTION . . . ULTRAVIOLET SPECTRA . . . VIBRATIONAL SPECTRA RADIATION METEOROID SPACECRAFT . . . VISIBLE SPECTRUM RADIATION HEATING . . . X RAY SPECTRA USE RADIANT HEATING RT METEOROIDS mRADlATlON . . EMISSION- SPECTRA mSPACECRAFT RT ASTRONOMICAL SPECTROSCOPY RAIHATION INTENSITY SPACECRAFT CONFIGURATIONS COSMIC BACKGROUND EXPLORER USE RADIANT FLUX DENSITY SATELLITE ENERGY SPECTRA RADIATION LAWS RADIATION METERS USE RADIATION MEASURING INSTRUMENTS MASS SPECTRA GS -LAWS NOISE SPECTRA . RADIATION LAWS PLASMA SPECTRA . KIRCHHOFF LAW OF RADIATION RADIATION PRESSURE mRADIATION . . STEFAN-BOLTZMANN LAW SN (DYNESISO CM AS DISTINGUISHED . . STOKES LAW OF RADIATION FROM RADIANT FLUX RT ELECTROMAGNETIC RADIATION DENSITY-DYNESICM-SEC) RADIATIVE TRANSFER QUANTUM THEORY GS PRESSURE GS RADIATIVE TRANSFER m RADIATION . RADIATION PRESSURE . RADIATIVE HEAT TRANSFER . . ELECTRON PRESSURE RT ATMOSPHERIC CORRECTION COSMIC RAYS RADIATION MEASURING INSTRUMENTS . . LUMENS ELECTROMAGNETIC RADIATION UF PHOTOELECTROMAGNETIC DETECTORS . . LUMINOUS INTENSITY ENERGY TRANSFER PHOTOSENSORS . . . ILLUMINANCE RADIATION METERS . . . LUMINANCE EXTRATERRESTRIAL RADIATION GS MEASURING INSTRUMENTS . .. SOUND PRESSURE GALACTIC RADIATION . RADIATION MEASURING RT BAROCLlNlC WAVES HEAT TRANSFER INSTRUMENTS BESSEL-BREDICHIN THEORY HEAT TRANSMISSION . . ACTINOMETERS COMET TAILS INTERSTELLAR RADIATION . . . INFRARED SPECTROMETERS CORPUSCULAR RADIATION NEAR INFRARED RADIATION . . . PYRANOMETERS ELASTIC WAVES PLANETARY ATMOSPHERES . . . RADIOMETERS ELECTROMAGNETIC RADIATION POLARIZED ELECTROMAGNETIC . . . . DlCKE RADIOMETERS KOHOUTEK COMET RADIATION . . . . INFRARED DETECTORS PARTICLE FLUX DENSITY RADIANT HEATING . . . . INFRARED SCANNERS PERTURBATION m RADIATION . . . . MICROWAVE RADIOMETERS PHOTOPHORESIS RADIATION TRANSPORT . . . PASSIVE L-BAND RADIOMETERS RADIANT FLUX DENSITY RADlO BURSTS . RADlO STARS . . . . PRESSURE MODULATOR .p RADIATION RADIOMETERS SOLAR FLUX DENSITY SOLAR RADIATION . . . . SPECTRORADIOMETERS SOLAR RADIATION STELLAR ATMOSPHERES . . . SOLAR SPECTROMETERS SOLAR WIND STELLAR RADIATION . . . SPECTROHELIOGRAPHS STELLAR WINDS . . . SPECTROPHOTOMETERS RADlO ASTRONOMY . . . . INFRARED RADIATION SOURCES GS ASTRONOMY SPECTROPHOTOMETERS UF COHERENT SOURCES . RADlO ASTRONOMY . . ULTRAVIOLET GS RADIATION SOURCES RT ASTRONOMICAL OBSERVATORIES SPECTROPHOTOMETERS MONOCHROMATORS ASTRONOMICAL- SPECTROSCOPY- -- . . ULTRAVIOLET DETECTORS NEUTRON SOURCES BRIGHTNESS D~STR~BUTION~ . . . . ULTRAVIOLET SPECTROMETERS . WlNT SOURCES BRIGHTNESS TEMPERATURE . . . . ULTRAVIOLET RT CORPUSCULAR RADIATION CORONAL HOLES SPECTROPHOTOMETERS DUOCHROMATORS EXTRAGALACTIC RADlO SOURCES . . BOLOMETERS ELECTROMAGNETIC RADIATION EXTRATERRESTRIAL RADlO WAVES RADlO ASTRONOMY EXPLORER B

RADIO ~cno€s-(WNZ) RADIO M~oRs-~WNT) Rnwo mm-(WNT) RADIO METEORS GAMMA RAY ASTRONOMY AURORAL ECHOES . . GHOSTS RT ATMOSPHERIC IONIZATION LIE METEOR TRAILS UNEAR POLARIZATION HARVARD RADlO METEOR PROJECT MAFFEI GALAXIES INFRARED REFLECTION MICHELSON INTERFEROMETERS LUNAR ECHOES RADlO OBSERVATION PHASE SWITCHING INTERFEROMETERS RADAR REFLECTORS RT OBSERVATION PULSARS ULTRAVIOLET REFLECTION SPACE OBSERVATIONS (FROM EARTH) QUASARS WASAT Rnwo EMISSION RAW0 OCCULTATION OS ELECTROMAGNETIC RADIATION 0s OCCULTATION . RAW WAVES . RAW OCCULTATION . . RADIO EMISSION RT ATMOSPHERIC COMPOSITION SAS-3 . . . CN EMISSION ATMOSPHERIC PRESSURE wSC1ENCE . . . HYDROXYL EMISSION ATMOSPHERIC TEMPERATLIRE VERY HIGH FREQUENCY RAW . . . RADIO BURSTS PLANETARY ATMOSPHERES EQUIPMENT . . . . SOLAR RADlO BURSTS SPACE PROBES VERY LARGE ARRAY WLA) . . . . . TYPE 2 BURST.? SPACECRAFT TRAJECTORIES VERY LONG BASE INTERFEROMETRY . . . . . TYPE 3 BURSTS VERY LONG BASELINE ARRAY (VLBA) . . . . . TYPE 4 BURSTS RADlO REFLECTION . . . . . TYPE 5 BURSTS USE RADlO ECHOES . . . SOLAR RADlO EMISSION RADIO ASTRONOMY EXPLORER B . . . . SOLAR RADlO BURSTS USE EXPLORER 49 SATELLITE RADIO SOURCES (ASTRONOMY) . . . . . TYPE 2 BURSTS SN (LIMITED TO EXTRATERRESTRIAL RADlO . . . . . TYPE 3 BURSTS SOURCES) RADIO ASTRONOMY EXPLORER SATELLITE . . . . . TYPE 4 BURSTS GS CELESTIAL BODIES GS ARTIFICIAL SATELLITES . . . . . TYPE 5 BURSTS RADIO SOURCES (ASTRONOMY) . SCIENTIFIC SATELLITES . EMISSION CASSIOPEIA A . EXPLORER SATELLITES . . . . RADlO EMISSION . . EXTRAGALACTIC RADlO SOURCES . . . RAW ASTRONOMY EXPLORER . . CN EMISSION . . RADlO GALAXIES SATELLITE . . HYDROXYL EMISSION . . . RADIO JETS (ASTRONOMY) . . RADIO BURSTS . . WASARS RADIO ASTRONOMY EXPLORER 2 . . . SOLAR RADIO BURSTS . . RADlO STARS USE EXPLORER 49 SATELUTE . . . . TYPE 2 BURSTS . . . PULSARS . . . . TYPE 3 BURSTS RT BL LACERTAE OBJECTS RADIO AURORAS . . . . TYPE 4 BURSTS CN EMISSION GS ATMOSPHERIC RADIATION . . . . TYPE 5 BURSTS EXTRATERRESTRIAL RADlO WAVES . AURORAS . . SOLAR RADlO EMISSION GALACTIC NUCLEI . . RADIO AURORAS . . . SOLAR RADlO BURSTS GALAXIES RT aDISTURBANCES . . . . TYPE 2 BURSTS HYDROXYL EMISSION IONOSPHERICS . . . TYPE 3 BURSTS IRREGULAR GALAXIES NIGHTGLOW . . . . TYPE 4 BURSTS SOLAR ACTIVITY . . . . TYPE 5 BURSTS MILKY WAY GALAXY RT EXTRAGALACTIC RADIO SOURCES RADIATION SOURCES RADIO BURSTS EXTRATERRESTRIAL RADlO WAVES r SOURCES GS BURSTS QUASARS . RADIO BURSIS RADlO JETS (ASTRONOMY) RADIO SPECTRA . . SOLAR RADlO BURSTS GS SPECTRA . . . TYPE 2 BURSTS RABIO FREQUENCY RADIATION . RADIATION SPECTRA . . . TYPE 3 BURSTS USE RADlO WAVES . . ELECTROMAGNETIC SPECTRA . . . TYPE 4 BURSTS . . . RADlO SPECTRA . . . TYPE 5 BURSTS RADIO QALAXIES . . . . MICROWAVE SPECTRA ELECTROMAGNETIC RADIATION GS CELESTIAL BODIES RT CARRIER WAVES . RADlO WAVES . GALAXIES ELECTROMAGNETIC NOISE . . EXTRATERRESTRIAL RADlO WAVES . . ACTIVE GALAXIES H I REGIONS . . . RADIO BURSTS . . . RADIO GALAXIES RADIANT FLUX DENSITY . . . . SOLAR RADlO BURSTS . RADlO SOURCES (ASTRONOMY) . TYPE 2 BURSTS ...... WITIAGAIACTIC RADlO SOURCES RADlO SPECTROSCOPY . . TYPE 3 BURSTS ...... RADIO GALAXIES GS SPECTROSCOPY . . TYPE 4 BURSTS . . . RT ACTIVE GALACTIC NUCLEI . RADlO SPECTROSCOPY . TYPE 5 BURSTS ' . . . . DISK GALAXIES RT ASTRONOMICAL SPECTROSCOPY RADlO EMlSSlON . . MAFFEI GALAXIES ULTRAVIOLET SPECTRA RADIO BURSTS . . . QUASARS ULTRAVIOLET SPECTROSCOPY . . SOLAR RADlO BURSTS . . X RAY SPECTROSCOPY . TYPE 2 BURSTS . . . . RADIO INTERFEROMETERS . . . . . TYPE 3 BURSTS GS MEASURING INSTRUMENTS . . . . . TYPE 4 BURSTS RADlO STARS . INTERFEROMETERS GS CELESTIAL BODIES . . . . . TYPE 5 BURSTS . . RADIO INTERFEROMETERS EMISSION . RADlO SOURCES (ASTRONOMY) RT ASTROPHYSICS . . RADlO STARS . RADlO EMISSION ORION (RADIO INTERFEROMETRY . . RADlO BURSTS . PULSARS NETWORK) . STARS . . . SOLAR RADlO BURSTS VERY LONG BASE INTERFEROMETRY . . . . TYPE 2 BURSTS . . RADlO STARS . . . . TYPE 3 BURSTS . . . PULSARS . . . . TYPE 4 BURSTS RADlO JETS (ASTRONOMY) RT QUASARS . . . . TYPE 5 BURSTS GS CELESTIAL BODIES RADIATIVE TRANSFER EXTRATERRESTRIAL RADIATION . RADlO SOURCES (ASTRONOMY) STELLAR RADIATION . EXTRATERRESTRIAL RADlO WAVES . . EXTRAGALACTIC RADIO SOURCES . . RADlO BURSTS . . . RADIO JETS (ASTRONOMY) RADIO TELESCOPES . . . SOLAR RADlO BURSTS PARTICLES GS RADlO EQUIPMENT . . . . TYPE 2 BURSTS . CHARGED PARTICLES RADlO TELESCOPES . . . . TYPE 3 BURSTS . . PLASMA JETS . KILOMETER WAVE ORBITING . . . . TYPE 4 BURSTS . . . RADIO JETS (ASTRONOMY) TELESCOPE . . . . TYPE 5 BURSTS RT ASTROPHYSICS . . VERY LARGE ARRAY (VLA) ENERGETIC PARTICLES RT ,L DISTURBANCES . . VERY LONG BASELINE ARRAY (VLBA) PULSARS EXTRATERRESTRIAL RADIATION TELESCOPES QUASARS EXTRATERRESTRIAL RADlO WAVES . RADIO TELESCOPES RADIATIVE TRANSFER GALACTIC NUCLEI . . KILOMETER WAVE ORBITING SOLAR RADlO EMISSION GALACTIC RADlO WAVES TELESCOPE STELLAR RADIATION QUASARS . VERY LARGE ARRAY (VLA) RADlO ASTRONOMY . . VERY LONG BASELINE ARRAY IVLBAI RADlO EMISSION RADlO ECHOES RT ANTENNAS . UF RADlO REFLECTION JODRELL BANK OBSERVATORY GS ECHOES RADIO METEORS OPTICAL EQUIPMENT . RADlO ECHOES GS CELESTIAL BODIES PHASE SWITCHING INTERFEROMETERS RT ANGELS (RADAR) . METEOROIDS QUASAT RANGER 3 LUNAR PROBE

LUNAR LANDING RADIO WAVES RADIOM~ERS-(CONT) RANGER VEHICLES-(CONZ) RT BOLOMETERS . SPACE PROBES UF RADlO FREQUENCY RADIATION LUNAR PROBES GS ELECTROMAGNETIC RADIATION FOREST FIRE DETECTION . . HORIZON SCANNERS . . . RANGER LUNAR PROBES . RAM0 WAVES . RANGER LUNAR LANDING DECAMETRIC WAVES INFRARED PHOTOGRAPHY . . . . . VEHtCLES EXTRATERRESTRIAL RADlO WAVES INFRARED TRACKING . . RT BE-3 ENGINE GALACTIC RADlO WAVES KNUDSEN GAGES . . . ar VEHICLES . . . RADIO BURSTS PHOTOMETERS . . . . SOLAR RADIO BURSTS PYRANOMETERS . . . . . TYPE 2 BURSTS RADIOMETRIC RESOLUTION RAN- LUNAR PROBES . . . . . TYPE 3 BURSTS SPEClROPHOTOMETERS UF RANGER SATELLITES . . . . . TYPE 4 BURSTS THERMISTORS GS LUNAR SPACECRAFT . . . . . TYPE 5 BURSTS ULTRAVIOLET DETECTORS . LUNAR PROBES . . . SOLAR RADlO EMISSION . . RAWER LUNAR PROBES . . SOLAR RADK) BURSTS RAE0 . . . RANGER LUNAR IANDING . . VEHICLES . . . . . TYPE 2 BURSTS USE EXPLORER 49 SATELLITE . . . . . TYPE 3 BURSTS . . . RANGER 1 LUNAR PROBE . . . . . TYPE 4 BURSTS . . . RANGER 2 LUNAR PROBE RAE 1 ... RANGER 3 LUNAR PROBE . . . . . TYPE 5 BURSTS USE EXPLORER 49 SATELUTE . . LONG WAVE RADIATION . . . RANGER 4 LUNAR PROBE . . RADlO EMISSION . . . RANGER 5 LUNAR PROBE . . . CN EMISSION RAE 2 ...RANGER 6 LUNAR PROBE . . . HYDROXYL EMISSION USE EXPLORER 49 SATELLITE . . . RANGER 7 LUNAR PROBE . . . RADlO BURSTS . . . RANGER 8 LUNAR PROBE . . . . SOLAR RADlO BURSTS RAINBOWS . . . RANGER 9 LUNAR PROBE . . . . . TYPE 2 BURSTS GS DISTRIBUTION (PROPERTY) UNMANNED SPACECRAFT . . . . . TYPE 3 BURSTS . RADIATION DISTRIBUTION . SPACE PROBES . . . . . TYPE 4 BURSTS . . DIFFRACTION PATERNS . . LUNAR PROBES . . . . . TYPE 5 BURSTS . . . RAINBOWS . . . RANGER LUNAR PROBES . . . SOLAR RADIO EMISSION RT HALOS . . . . RANGER LUNAR LANDING . . . . SOLAR RADIO BURSTS LIGHT TRANSMISSION VEHICLES . . . . . TYPE 2 BURSTS RAIN . . . RANGER 1 LUNAR PROBE . . . . . TYPE 3 BURSTS . . . . RANGER 2 LUNAR PROBE . . . RANGER 3 LUNAR PROBE . . . . . TYPE 4 BURSTS RAMAN EFECT . RANGER 4 LUNAR PROBE . . . . . TYPE 5 BURSTS USE RAMAN SPECTRA ...... SHORT WAVE RADIATION .... RANGER 5 LUNAR PROBE . . . MICROWAVES .... RANGER 6 LUNAR PROBE RAMAN SCATTERING .... RANGER 7 LUNAR PROBE . . . . CENTIMETER WAVES USE RAMAN SPECTRA . . . . DECIMETER WAVES . . . . RANGER 8 LUNAR PROBE . . . . MICROWAVE EMISSION .... RANGER 9 LUNAR PROBE . MILLIMETER WAVES RAMAN SPECTRA RT ATLAS AGENA B LAUNCH VEHICLE . . . UF RAMAN EFFECT . . . SUBMILLIMETER WAVES RAMAN SCATTERING . . SKY WAVES RANGER PROJECT WHISTLERS GS SCATTERING GS PROGRAMS . . . WAVE SCATTERING RT ATMOSPHERICS . . NASA PROGRAMS ELECTROMAGNETIC SCATTERING COHERENT ELECTROMAGNETIC . . . . NASA SPACE PROGRAMS RAMAN SPECTRA RADIATION ...... RANGER PROJECT SPECTRA ELECTROMAGNETIC NOISE . . . . AGENA B RANGER PROGRAM MOLECULAR SPECTRA ELECTROMAGNETIC SURFACE WAVES . . PROJECTS RAMAN SPECTRA EXTRATERRESTRIAL RADIATION . . . . RANGER PROJECT RADIATION SPECTRA FAR INFRARED RADIATION . . . . AGENA B RANGER PROGRAM ELECTROMAGNETIC SPECTRA FREQUENCIES . . . SPACE PROGRAMS RAMAN SPECTRA GROUND WAVE PROPAGATION . . . . . NASA SPACE PROGRAMS MONOCHROMATIC RADIATION RT ABSORPTION SPECTRA . . . RANGER PROJECT MULTIPATH TRANSMISSION EMISSION SPECTRA . . . . AGENA B RANGER PROGRAM LIGHT WlSlBLE RADIATION) NONTHERMAL RADIATION RT AGENA B ROCKET VEHICLE PLANETARY RADIATION UNE SPECTRA AGENA ROCKET VEHICLES POLARIZED ELECTROMAGNETIC MOLECULAR ROTATION ATLAS LAUNCH VEHICLES RADIATION NONLINEAR OPTICS LUNAR PHOTOGRAPHS SCATTER PROPAGATION VIBRATIONAL SPECTRA LUNAR PHOTOGRAPHY SOLAR RADIATION LUNAR PROBES SOLITARY WAVES RAMAN SPECTROSCOPY THERMAL RADIATION UF COHERENT ANTI-STOKES RAMAN RANGER SATELLITES TRANSVERSE WAVES SPECTROSCOPY USE RANGER LUNAR PROBES TRAVELING WAVES GS SPECTROSCOPY TROPOSPHERIC WAVES . MOLECULAR SPECTROSCOPY . . RAMAN SPECTROSCOPY RANGER 1 LUNAR PROBE RT ASTRONOMICAL SPECTROSCOPY GS LUNAR SPACECRAFT RADIOMETEOROGRAPHS INFRARED SPECTROSCOPY . LUNAR PROBES GS MEASURING INSTRUMENTS LINE SPECTRA . . RANGER LUNAR PROBES . METEOROLOGICAL INSTRUMEN1 OPTOGALVANIC SPECTROSCOPY . . RANGER 1 LUNAR PROBE . . RADIOMETEOROGRAPHS RAYLEIGH SCAlTERlNG UNMANNED SPACECRAFT RADlO EQUIPMENT SPECTROSCOPIC ANALYSIS . SPACE PROBES . RADlO TRANSMITTERS . . LUNAR PROBES . . RADIOMETEOROGRAPHS . . . RANGER LUNAR PROBES RANGER BLOCK 3 TELEVISION SYSTEM .... RANGER 1 LUNAR PROBE RECORDING INSTRUMENTS GS COMMUNICATION EQUIPMENT . RADIOMETEOROGRAPHS . SPACECRAFT TELEVlSlON TRANSMITERS . . RANGER BLOCK 3 TELEVISION RANGER 2 LUNAR PROBE . RADlO TRANSMITERS SYSTEM GS LUNAR SPACECRAFT . . RADIOMETEOROGRAPHS TELECOMMUNICATION . LUNAR PROBES RT RADlO TELEMETRY . SPACECRAFT TELEVISION . . RANGER LUNAR PROBES RADIOSONDES ... RANGER 2 LUNAR PROBE . . RANGER BLOCK 3 TELEVISION , SYSTEM UNMANNED SPACECRAFT SPACE PROBES RADIOMETERS TELEVISION SYSTEMS . SPACECRAFT TELEVISION . . LUNAR PROBES GS MEASURING INSTRUMENTS RANGER LUNAR PROBES RADIATION MEASURING INSTRUMEN? . . RANGER BLOCK 3 TELEVISION .... RANGER 2 LUNAR PROBE ACTINOMETERS SYSTEM . . . RADIOMETERS RT ,SYSTEMS . . . . DlCKE RADIOMETERS RANGER 3 LUNAR PROBE . . . . INFRARED DETECTORS RANGER LUNAR LANDING VEHICLES GS LUNAR SPACECRAFT . . . . INFRARED SCANNERS GS LUNAR SPACECRAFT LUNAR PROBES . . MICROWAVE RADIOMETERS LUNAR PROBES RANGER LUNAR PROBES . . . PASSIVE L-BAND RADIOMETERS . RANGER LUNAR PROBES . . . RANGER 3 LUNAR PROBE . . . . PRESSURE MODULATOR . . . RANGER LUNAR LANDING UNMANNED SPACECRAFT RADIOMETERS VEHICLES SPACE PROBES . . . . SPECTRORADIOMETERS UNMANNED SPACECRAFT . . LUNAR PROBES RANGER 4 LUNAR PROBE

RANGER 3 LUNAR PUOBE-(CONX) RED ARCS-(coNX) REFRACTING TELESCOPES . . . RANGER LUNAR PROBES RT eoARCS GS TELESCOPES . . . . RANGER 3 LUNAR PROBE AURORAL IONIZATION . REFRACTING TELESCOPES RT LENSES OPTICAL EQUIPMENT RANGER 4 LUNAR PROBE RED DWARF STARS OPTICAL MEASURING INSTRUMENTS GS LUNAR SPACECRAFT GS CELESTIAL BODIES SPECTROSCOPIC TELESCOPES . LUNAR PROBES . STARS STRATOSMPE TELESCOPES . . RANGER LUNAR PROBES . . MAIN SEQUENCE STARS . . . RAM4 LUNAR PROBE . . . DWARF STARS UNMANNED SPACECRAFT . . . . RED DWARF STARS REFRACTIVE INDEX . SPACE PROBES RT HOT STARS USE REFRACTIVITY . . LUNAR PROBES LATE STARS . . . RANGER LUNAR PROBES STrLLAR LUMINOSITY REFRACTIVITY . . . . RANGER 4 LUNAR PROBE STELLAR MAGNITUDE UF REFRACTIVE INDEX RT AMAGENA B UUNCH VEHICLE SUBDWARF STARS GS ELECTFlOMAGNETlC PROPERTIES SUPERNOVA REMNANTS . OPTICAL PROPERTIES WHITE DWARF STARS . . RVRACTIVIN RANGER 5 LUNAR PROBE RT ATMOSPHERIC REFRACTION GS LUNAR SPACECRAFT BIREkaINGENCE . LUNAR PROBES RED GIANT STARS BIREFRINGENT COATINGS RANGER LUNAR PROBES . . GS CELESTIAL BODIES BIREFRINGENT FILTERS . . . RANGER 5 LUNAR PROBE . STARS BREWSTER ANGLE UNMANNED SPACECRAFT . . GIANT STARS GRADIENT INDEX OPTICS SPACE PROBES . . . . RED GIANT STARS ISOTROPISM LUNAR PROBES ...... CARBON STARS LIGHT (VISIBLE RADIATION) . . . RANGER LUNAR PROBES RT ASYMPTOTIC GIANT BRANCH STARS OPACI~;, RANGER 5 LUNAR PROBE . . . . LATE STARS OPTICAL THICKNESS M STARS POLARIZATION (WAVES) RANGER 8 LUNAR PROBE MlRA VARIABLES RATIOS GS LUNAR SPACECRAFT S STARS REFRACTION . LUNAR PROBES STELLAR EVOLUTION REFRACTOMETERS . . RANGER LUNAR PROBES STELLAR LUMINOSITY SNELLS LAW . . . RANQER 6 LUNAR PROBE UNDERWATER OPTICS UNMANNED SPACECRAFT RED SHIFT . SPACE PROBES RT COSMOLOGY REGOLITH . . LUNAR PROBES COPPLER EFFECT GS ROCKS . . . RANGER LUNAR PROBES WPPLER-F IZEAU EFFECT . REGOLITH . . . . RANGER 8 LUNAR PROBE GALAXIES RT BASALT HUBBLE CONSTANT BEDROCK RANGER 7 LUNAR PROBE HUBBLE DIAGRAM BRECCIA GS LUNAR SPACECRAFT IRREGULAR GALAXIES CARBONACEOUS ROCKS . LUNAR PROBES RADIAL VELOCITY COAL . . RANGER LUNAR PROBES EARTH MANTLE . . . RANGER 7 LUNAR PROBE REFERENCE STARS EARTH RESOURCES UNMANNED SPACECRAFT GS CELESTIAL BODIES ENSTATITE . SPACE PROBES . STARS GEOLOGY . . LUNAR PROBES . REFERENCE STARS IGNEOUS ROCKS RANGER LUNAR PROBES . . . . RT ASTRONOMICAL COORDINATES LAVA . . . . RANGER 7 LUNAR PROBE ASTRONOMICAL PHOTOGRAPHY LITHOLOGY CELESTIAL NAVIGATION LUNAR GEOLOGY RANGER 8 LUNAR PROBE NAV~ATIONAIDS LUNAR MANTLE GS LUNAR SPACECRAFT SPACE NAVIGATION LUNAR ROCKS . LUNAR PROBES MAGMA . . RANGER LUNAR PROBES OLIVINE . . . RANGER 8 LUNAR PROBE REFLECTING TELESCOPES PER1WTlTE UNMANNED SPACECRAFT GS TELESCOPES PYROXENES . SPACE PROBES . REFLECTING TELESCOPES ROCK INTRUSIONS . . LUNAR PROBES . . STARSAT TELESCOPE SELENOLOGY . . . RANGER LUNAR PROBES RT CASSEGRAIN OPTICS STRATIGRAPHY . . . . RANGER 8 LUNAR PROBE MIRRORS OPTICAL EQUIPMENT REISSNER-NORDSTROM SOLUTION OPTICAL MEASURING INSTRUMENTS RT ASTRONOMICAL MODELS RANGER 9 LUNAR PROBE PARABOLOID MIRRORS GS LUNAR SPACECRAFT BLACK HOLES (ASTRONOMY) REFLECTORS LUNAR PROBES CHARGED PARTICLES . SCHMIDT TELESCOPES RANGER LUNAR PROBES GRAVITATIONAL EFFECTS . . SPECTROSCOPIC TELESCOPES RANGER 9 LUNAR PROBE RELATIVITY . . . STRATOSCOPE TELESCOPES UNMANNED SPACECRAFT . SPACE PROBES RELATIVISTIC EFFECTS . . LUNAR PROBES REFLECTION NEBULAE RT DIMENSIONS . . . RANGER LUNAR PROBES GS CELESTIAL BODIES m EFFECTS . . . . RANGER 9 LUNAR PROBE . NEBULAE GRAVITATIONAL LENSES . . REFLECTION NEBULAE MASS RAY TRACING RT COSMIC DUST RELATIVITY RT DIFFRACTION INTERSTELLAR MATTER TIME GEOMETRICAL OPTICS LIGHT SCATTERING VELOCITY GEOMETRICAL THEORY OF DIFFRACTION REFRACTED RADIATION RELATIVISTIC PARTICLES GRADIENT INDEX OPTICS USE REFRACTED WAVES GS PARTICLES GRAZING INCIDENCE . RELATIVISTIC PARTICLES OPTICAL MEASUREMENT . . RELATIVISTIC ELECTRON BEAMS REFLECTANCE REFRACTED RAYS RT HAMILTONJACOBI EQUATION TRACKING (POSITION) USE REFRACTED WAVES TRANSMITTANCE RELATIVISTIC PLASMAS REFRACTED WAVES GS PARTICLES RCB STARS UF REFRACTED RADIATION CHARGED PARTICLES USE R CORONAE BOREALIS STARS REFRACTED RAYS ENERGETIC PARTICLES RT CORPUSCULAR RADIATION . . . PLASMAS (PHYSICS) REACTION JET BACKPACKS EIKONAL EQUATION . . . . RELATIVISTIC PLASMAS USE SELF MANEUVERING UNITS ELASTIC WAVES RT ASTRON THERMONUCLEAR REACTOR ELECTROMAGNETIC RADIATION BREMSSTRAHLUNG RED ARCS INCIDENT RADIATION COSMIC PLASMA GS ATMOSPHERIC RADIATION PHOTON BEAMS ELECTRON PLASMA . AURORAS REFLECTED WAVES GRAVITATIONAL COLLAPSE . . AURORAL ARCS REFRACTION HIGH TEMPERATURE PLASMAS . . . RED ARCS rn WAVES PINCH EFFECT ROCKET SOUNDING RU*TIVISTIC m&wM-(CoN~) RESOLUTION-(WNT) . SPECTRAL RESOLUTION GS SOUNDING PLASMA JETS . ROCKET SOUNDING PLASMA RADIATION . TEMPORAL RESOLUTION PLASMA-PARTICLE INTERACTIONS RT ACCURACY RT ACOUSTIC SOUNDING ATMOSPHERIC SOUNDING PONOEROMOTlVE FORCES AUTOMATIC TRAFFIC ADVISORY AND RESOLUTION BARIUM ION CLOUDS NO SPHERIC SOUNDING RELA~VISTICVELOCITY BLURRING CHARAGER RECOGNITION JUDI-DART ROCKET GS RATES (PER TIM0 MICROWAVE SOUNDING RELATIVISTIC VELOCITY CONTRAST . MFlNmON SATELUTE SOUNDING VELOCITY SOUNDING ROCKETS . RELATIVISTK: VELOCITY DYNAMIC CHARACTERISTICS RT HlGH SPEED ERRORS FOCI s HYPERVELOCITY ROCKET-BORNE PHOTOGRAPHY LIGHT SPEED HlGH RESOLUTION COVERAGE GS IMAGERY PARTICLE MOTION ANTENNAS . ROCKET-BORNE PHOTOGRAPHY IMAGE CONTRAST PHOTOGRAPHY IMAGE ENHANCEMENT RELATIVITY . ROCKET-BORNE PHOTOGRAPHY LEGlBlUTY RT AERIAL PHOTOGRAPHY UF GEOMETRODYNAMICS LOCI SPACE-TIME CONTINUUM ASTRONOMICAL PHOTOGRAPHY r OPTICS BLACK AND WHITE PHOTOGRAPHY RT BIG BANG COSMOLGGY PERCEPTION CONTINUUMS PHOTOMAPPING m POWER DIFFERENTIAL GEOMETRY SATELLITE-BORNE PHOTOGRAPHY PRECISION SPACEBORNE PHOTOGRAPHY FIELD THEORY (PHYSICS) RESOLUTION CELL GRAND UNIFIED THEORY SENSITIVITY GRAVITATIONAL LENSES SPATIAL FILTERING ROCKS GRAVITY PROBE B STARK EFFECT UF STONES (ROCKS) INERTIAL REFERENCE SYSTEMS mTHRESH0U)S GS ROCKS LIGHTGONE EXPANSION TOLERANCES (MECHANICS) . ANDESITE LORENTZ CONTRACTION VISIBILITY ATAXITE NAKED SlNGULARlTlES . VISION . BEDROCK NONRELAT~V~S~CMECHANICS . . BALTIC SHIELD (EUROPE) PARADOXES . . BATHOLITHS PONDEROMOTIVE FORCES RESOLVING POWER . BRECCIA USE RESOLUTION . GNEISS SOLUTION . IGNEOUS ROCKS . . ANORTHOSITE SCHWARZSCHILD METRIC RETURN TO EARTH SPACE FLIGHT GS SPACE FUGHT . . BASALT SPACE-TIME FUNCTIONS . . DlORlTE STRING THEORY . RETURN TO EARTH SPACE FLIGHT AT INTERPLANETARY FLIGHT . . DUNITE SUPERGRAVITY . . ECLOGITE TENSOR ANALYSIS MANNED MARS MISSIONS SPACECRAF'REENTRY . . FELSITE UNIFIED FIELD THEORY . . GABBRO . GRANITE RELIC RADIATION RHEA (ASTRONOMY) . OBSIDIAN RT ASTRONOMY GS CELESTIAL BODIES . . MOLDAVITE ASTROPHYSICS , NATURAL SATELLITES . . PERlDOTlTE BACKGROUND RADIATION . . ICY SATELLITES . . PUMICE BIG BANG COSMOLOGY . . . RHEA (ASTRONOMY) . . RHYOLITE EXTRATERRESTRIAL RADIATION . . SATURN SATELLITES . . SYENITE m RADIATION . . . RHEA (ASTRONOMY) . . TRACHYTE UNIVERSE RT SATURN (PLANETI . LUNAR ROCKS SOLAR SYSTEM . . KREEP RELIEF MAPS . METAMORPHIC ROCKS GS MAPS . . QUARTZITE RELIEF MAPS RIFT VAUEYS . USE VALLEYS REGOLITH RT HYPSOGRAPHY . SCHIST PHOTOGRAMMETRY . SEDIMENTARY ROCKS PHOTOMAPS RILLS . . CARBONACEOUS ROCKS TOPOGRAPHY USE VAUEYS . . . COAL . . . . ANTHRACITE RENDEZVOUS . . . LIGNITE -n RINGS . GS RENDEZVOUS SN (USE OF A MORE SPECIFIC TERM IS . . LIMESTONE . SPACE RENDEZVOUS RECOMMENDED-CONSUL T THE TERMS . . SANDSTONES . . ORBITAL RENDEZVOUS LISTED BELOW . . SHALES . . . EARTH ORBITAL RENDEZVOUS RT ANNULI . SHATER CONES . . . LUNAR ORBITAL RENDEZVOUS BODIES OF REVOLUTION RT AGGREGATES RT APOLLO SOYUZ TEST PROJECT CIRCLES (GEOMETRY) BAUXITE FLIGHT MECHANICS JUPITER RINGS BOREHOLES INTERCEPTION 0 RING SEALS CLAYS ORBITAL MECHANICS PLANETARY RlNGS CONTACTS (GEOLOGY) REINFORCEMENT RlNGS CROSSBEDDING (GEOLOGY) RENDEZVOUS TRAJECTORIES RING STRUCTURES DIRT GS TRAJECTORIES RlNGS (MATHEMATICS) DOLOMITE (MINERAL) . RENDEZVOUS TRAJECTORIES SATURN RlNGS EARTH RESOURCES RT ASCENT TRAJECTORIES STORAGE RlNGS (PARTICLE EFFUSIVES CIRCUMLUNAR TRAJECTORIES ACCELERATORS) ENSTATITE EARTH ORBITAL RENDEZVOUS TOROIDAL PLASMAS FOLDS (GEOLOGY) EARTH-MOON TRAJECTORIES TORUSES FORMATIONS FLIGHT MECHANICS URANUS RlNGS GEOLOGY INTERPLANETARY TRAJECTORIES VORTEX RlNGS GYPSUM ORBITAL MECHANICS INLIERS (LANDFORMS) ORBITAL RENDEZVOUS KARST SPACE RENDEZVOUS ROCHE LIMIT LANDSLIDES SPACECRAFT DOCKING GS RANGE (EXTREMES) LATERITES SPACECRAFT TRAJECTORIES . ROCHE LIMIT LAVA RT CELESTIAL MECHANICS LEDGES DIMENSIONAL STABILITY LITHOLOGY RESOLUTION GRAVITATION UF RESOLVING POWER MAGMA NATURAL SATELLITES METAMORPHISM (GEOLOGY) GS RESOLUTION ORBITS ANGULAR RESOLUTION MINERALS ROTATING BODIES NUNATAKS HlGH RESOLUTION TWO BODY PROBLEM IMAGE RESOLUTION OLIVINE . RADAR RESOLUTION OUTLIERS (LANDFORMS) . RADIOMETRIC RESOLUTION ROCKET SONDES PALEOMAGNETISM SPATIAL RESOLUTION USE SOUNDING ROCKETS PETROGRAPHY ROENTGEN SATELLITE ROCKS-(WNT.) ROTAT~N-(WNT.) S-74 SATELLITE PETROLOGY ANGULAR VELOCITY USE EXPLORER 18 SATELLITE PYROXENES AXES OF ROTATION QUARTZ CIRCULATION SAGIlTARIUS CONSTELLATtON REEFS CORlOLlS EFFECT GS CONSTELLATIONS ROCK INTRUSIONS CROSS POLARIZATION , SAGITTARIUS CONSTELLATIOM ROCK MECHANICS FARADAY EFFECT IMAGE ROTATION SERPENTINE SALYUT SPACE STATION SOILS LIBRATION GS ARTIFICIAL SATELLITES STRATIGRAPHY m MOTION SPACE STATIONS NWATION . TUNNELING (EXCAVATION) SALYUT SPACE STATION PITCH (INCLINATION) . . MANNED SPACECRAFT POLARIZATION (SPIN ALIGNMENT) ROENTGEN SATEWrr SALYUT SPACE STATION POLARIZATION WAVES) . USE ROSAT MISSION SOVIET SPACECRAFT PRECESSION . SALYUT SPACE STATION RNOLVING STATIONS ROSAT MISSION ROLL . SPACE STATIONS UF ROENTGEN SATELLITE ROTARY STABILITY SALYUT SPACE STATION GS ARTIFICIAL SATELLITES ROTATING BODIES . . RT SOYUZ SPACECRAFT . ROSAT MISSION ROTATING LIQUIDS SPACE BASES OBSERVATORIES ROTATING MAmR SPACE LABORATORIES , ASTRONOMICAL OBSERVATORIES ROTONS SPACECRAFT DOCKING . . ROSAT MISSION TOROUE U.S.S.R. SPACE PROGRAM RT ASTRONOMICAL SATELLITES VORTEX AVOIDANCE INTERNATIONAL COOPERATION VORTICES SPACEBORNE ASTRONOMY YAW SAS SPACEBORNE TELESCOPES UF SMALL ASTRONOMY SATELLITES X RAY ASTRONOMY ROUND TRlP TRAJECTORIES GS OBSERVATORIES X RAY SOURCES ASTRONOMICAL OBSERVATORIES X RAY TELESCOPES GS TRAJECTORIES . ROUND TRlP TRAJECTORIES . . ASTRONOMICAL SATELLITES . . CIRCUMLUNAR TRAJECTORIES . . . SAS ROTATING RT EARTH-MOON TRAJECTORIES . . . . EXPLORER 53 SATELLITE USE ROTATION INTERORBITAL TRAJECTORIES . . . . SAS1 INTERPLANETARY FUGHT . . . . SASZ ROTATING BODIES INTERPLANETARY TRAJECTORIES . . . . SAS-3 UF ROTATING VEHICLES MOON-EARTH TRAJECTORIES RT EXPLORER 48 SATELLITE SOLID ROTATION ORBITAL MECHANICS UHURU SATELLITE GS ROTATING BOOlES SPACECRAFT TRAJECTORIES . LUNAR ROTATION SWINGBY TECHNIQUE SAS-D . ROTATING CYLINDERS USE IUE ROTATING DISKS . ROVING VEHICLES ROTATING SPHERES UF EXTRATERRESTRIAL ROVING VEHICLES ROTORS SAS-1 . GS SURFACE VEHICLES SMALL ASTRONOMY SATELLITE 1 COMPRESSOR ROTORS UF . . ROVING VEHICLES OBSERVATORIES . . FLYWHEELS . GS LUNAR ROVING VEHICLES , ASTRONOMICAL OBSERVATORIES IMPELLERS ...... LUNOKHOD LUNAR ROVING . . ASTRONOMICAL SATELLITES . . . PUMP IMPELLERS VEHICLES . . ROTARY WINGS . . . SAS RT PLANETARY LANDING . . . . SAS-1 . . . CIRCULATION CONTROL ROTORS PLANETARY SURFACES LIFTING ROTORS RT RADIO ASTRONOMY . . . RESEARCH VEHICLES . . . . BEARINGLESS ROTORS SPACEBORNE ASTRONOMY TOROIDAL WHEELS RIGID ROTORS . . . mVEHlCLES . . . TILTING ROTORS SAS-2 . . . TIP DRIVEN ROTORS UF SMALL ASTRONOMY SATELLITE 2 . . . X WING ROTORS RYDBERG SERIES GS OBSERVATORIES . . TAIL ROTORS GS SPECTRA . ASTRONOMICAL OBSERVATORIES . . . HELICOPTER TAIL ROTORS . RADIATION SPECTRA . . ASTRONOMICAL SATELLITES . . TIP VANES . . ELECTROMAGNETIC SPECTRA . . . SAS . . TURBINE WHEELS . . . LINE SPECTRA . . . . SAS2 RT AXES OF ROTATION . . . . RYDBERG SERIES RT EXPLORER 48 SATELLITE m BODIES RT ABSORPTION SPECTRA RADIO ASTRONOMY PLANETARY ROTATION ATOMIC SPECTRA SPACEBORNE ASTRONOMY ROCHE LIMIT ELECTRON TRANSITIONS ROTARY GYROSCOPES EMISSION SPECTRA SAS-3 ROTARY STABILITY H LINES UF SMALL ASTRONOMY SATELLITE 3 ROTATION HYDROGEN GS OBSERVATORIES SPINNING UNGUIDED ROCKET . ASTRONOMICAL OBSERVATORIES TRAJECTORY . . ASTRONOMICAL SATELLITES . . . SAS ROTATING MITER . . . SAS-3 RT DEGENERATE MATTrR RT EXPLORER 53 SATELLITE MAVER (PHYSICS) RADIO ASTRONOMY ROTATION S STARS SPACEBORNE ASTRONOMY SPlN DYNAMICS GS CELESTIAL BODIES X RAY ASTRONOMY . STARS ROTATING VEHICLES . . LATE STARS SATAN (SENSOR) USE ROTATING BODIES . . . COOL STARS USE TERRAIN ANALYSIS VEHICLES . . . . S STARS RT ASYMPTOTIC GIANT BRANCH STARS SATELLITE ATMOSPHERES ROTATION GIANT STARS GS ENVIRONMENTS UF ROTATING M STARS EXTRATERRESTRIAL ENVIRONMENTS WHIRL MlRA VARIABLES SATELLITE ATMOSPHERES WHIRLING RED GIANT STARS LUNAR ATMOSPHERE GS GYRATION RT L ATMOSPHERES . ROTATION S-16 SATELLITE ATMOSPHERIC CHEMISTRY . . AUTOROTATION USE OSO-1 ATMOSPHERIC COMPOSITION . . COROTATION ATMOSPHERIC PHYSICS EARTH ATMOSPHERE . . COUNTER ROTATION S-17 SATELLITE EARTI-! IONOSPHERE . . EARTH ROTATION USE OSO-2 . . MOLECULAR ROTATION EARTH MAGNETOSPHERE . . MUON SPlN ROTATION IONOSPHERIC COMPOSITION . . PLANETARY ROTATION MAGNETOPAUSE . . SATELLITE ROTATION NATURAL SATELLITES . . STELLAR ROTATION PLANETARY ATMOSPHERES . . SOLAR ROTATION S-57 SATELLITE STELLAR ATMOSPHERES . RT ANGULAR ACCELERATION USE OSO-C TITAN SEASONS

SATELLWE ATMOSPHERE~(~N~) SATURN PUOJECT-(CON~) SCHRElBERSm TRITON RIFT (REACTOR IN FLIGHT TEST) GS IRON COMPOUNDS UPPER ATMOSPHERE VOYAGER PROJECT . SCHREIBERSITE MINERALS SATELLITE DESIGN SATURN RINGS . SCHREIBERSITE GS SPACECRAFT DESIGN GS CELESTIAL BODIES NICKEL COMWUNDS . SATELLITE DESIGN . PLANETARY RINGS . SCHREtBERSITE RT COMPUTER AIDED DESIGN . . SATURN RINGS PHOSPHORUS COMWUNDS rn DESIGN RT GAS GIANT PLANETS . PHOSPHIDES INDIAN SPACE PROGRAM JUPITER RINGS . . SCHRElBERBm JAPANESE SPACE PROGRAM NATURAL SATELLITES RT IRON MmORlTES PRODUCT DEVELOPMENT PLAWTARY ATMWERES METEORITIC COMPOSITION SPACECRAFT STRUCTURES PLANETARY COMPOSITION STONY METEORITES STRUCTURAL DESIGN PLANETARY SURFACES SYSTEMS ENGINEERING PLANETARY TEMPERATURE SCHWARZSCHILD METRIC PLANETOLOGY RT BlMETRlC THEORIES SATELLITE MANEUVERS PLANETS COORDINATE TRANSFORMATIONS USE SPACECRAFT MANEUVERS -RINGS ESCAPE VELOCITY SOLAR SYSTEM GRAVITATIONAL FIELDS SAI~LUTE ORBIT CALCULATION URANUS RINGS IONIZATION USE ORBIT CALCULATION LIGHT SPEED SATURN SATELLITES ORBITALS SATELLITE SURFACES GS CELESTIAL BODIES ORBITS SN (RESTRICTED TO NATURAL SATELLITES) . NATURAL SATELLITES RELATIVITY GS SATELLfTE SURFACES . . SATURN SATELLITES . LUNAR SURFACE . . . DlONE SCHWASSMANKWACHMANN COMET RT CRATERS . . . ENCELADUS GS CELESTIAL BODIES ICY SATELLITES . . . HYPERION . COMETS MERCURY SURFACE . . . IAPETUS . . SCHWASSMANN-WACHMANN COMET NATURAL SATELUTES . . . JANUS . . . MlMAS mSURFACES SClNTlLLATlON TERRAIN ANALYSIS . . . WEBE . . . RHEA (ASTRONOMY) RT GUNT TETHYS PHOSPHORESCENCE SATEum-BORNE INSTRUMENTS . . . TITAN GS MEASURING INSTRUMENTS . . . RT ICY SATELUTES SClNTILLATlON COUNTERS . SATELLITE-BORNE INSTRUMENTS UF SCINTILLATORS . . AMPS (SATELLITE PAYLOAD) SClNTlLLOMEERS RT AMPTE (SATEUITESI SATURN WORKSHOPS GS ARTIFICIAL SATELLITES GS MEASURING INSTRUMENTS DIAL SATELLITE . . COUNTERS INFRARED RADIOMETERS . ORBITAL WORKSHOPS . . SATURN WORKSIWPS . . RADIATION COUNTERS INSTRUMENT PACKAGES . . . SCINTILLATION COUNTERS rn INSTRUMENTS . . . SATURN 1 WORKSHOP . . . SATURN 5 WORKSHOP . RADIATION MEASURING INSTRUMENTS OPEN PROJECT . . RADIATION COUNTERS PARTICLE TELESCOPES MANNED SPACECRAFT . ORBITAL WORKSHOPS . . . SCINTILLATION COUNTERS RADIATION DETECTORS RT CERENKOV COUNTERS REMOTE SENSORS . . SATURN WORKSHOPS . . . SATURN 1 WORKSHOP NEUTRON COUNTERS SINGLE EVENT UPSETS PARTICLE TELESCOPES SOLAR BACKSCATTER UV . . . SATURN 5 WORKSHOP RT AlRLOCK MODULES PHOTOMULTIPLIER TUBES SPECTROMETER PHOTOPEAK VISIBLE INFRARED SPIN SCAN APOLLO APPLICATIONS PROGRAM RADIOMETER APOUO PROJECT MULTIPLE DOCKING ADAPTERS SCINTILLATORS SATURN (PLANET) SKYLAB PROGRAM USE SCINTILLATION COUNTERS GS CELESTIAL BODIES SPACE STATIONS . PLANETS SCINTILLOMETERS . . GAS GIANT PLANETS SAUDI ARABIAN SPACE PROGRAM USE SCINTILLATION COUNTERS . . . SATURN (PLANET) GS PROGRAMS RT DlONE . SPACE PROGRAMS SCORPIO CONSTEUATtON ENCELADUS . . SAUDI ARABIAN SPACE PROGRAM USE SCORPIUS CONSTELLATION HYPERION RT ARABSAT IAPETUS ARCOMSAT JANUS SAUDI ARABIA SCORPlUS CONSTELLATION MlMAS SPACE SHUTTLE MISSION 51-G UF SCORPIO CONSTELLATION PHOEBE GS CONSTELLATIONS RHEA (ASTRONOMY) SCALE MODELS . SCORPIUS CONSTELLATION =SATURN GS MODELS RT ZODIAC TETHYS . SCALE MODELS TITAN RT AERODYNAMIC CONFIGURATIONS SCUTUM CONSTELLATION AIRCRAFT MODELS GS CONSTELLATIONS SATURN ATMOSPHERE REYNOLDS EQUATION . SCUTUM CONSTELLATION GS ENVIRONMENTS SCALING LAWS RT ZODIAC . EXTRATERRESTRIAL ENVIRONMENTS SEMISPAN MODELS SIMILARITY THEOREM . . PLANETARY ENVIRONMENTS SEARCH FOR EXTRATERRESTRIAL . . . PLANETARY ATMOSPHERES SIMILITUDE LAW SPACECRAFT MODELS INTELLIGENCE . . . . SATURN ATMOSPHERE USE PROJECT SET1 RT ATMOSPHERIC COMPOSITION WlND TUNNEL MODELS PLANETARY IONOSPHERES PLANETARY RADIATION SCARPS SEASONAL VARIATIONS USE ESCARPMENTS USE ANNUAL VARIATIONS SATURN PROJECT GS PROGRAMS SCHMIDT CAMERAS SEASONS NASA PROGRAMS GS OPTICAL EQUIPMENT GS SEASONS . NASA SPACE PROGRAMS . CAMERAS AUTUMN . . . SATURN PROJECT . . SCHMIDT CAMERAS SPRING (SEASON) PROJECTS PHOTOGRAPHIC EQUIPMENT SUMMER . . SATURN PROJECT CAMERAS WINTER SPACE PROGRAMS SCHMIDT CAMERAS RT ANNUAL VARIATIONS . . NASA SPACE PROGRAMS AT ASTRONOMICAL PHOTOGRAPHY CLIMATOLOGY . . . SATURN PROJECT BAKER-NUNN CAMERA CROP CALENDARS RT APOLLO APPLICATIONS PROGRAM TELESCOPES EQUINOXES APOLLO SPACECRAFT METEOROLOGY CENTAUR LAUNCH VEHICLE SCHMIDT TELESCOPES SOLAR POSITION LAUNCH VEHICLES GS TELESCOPES SOLSTICES LUNAR LAUNCH . SCHMIDT TELESCOPES WEATHER PEGASUS SATELLITES RT REFLECTING TELESCOPES WlND VARIATIONS SECONDARY COSMIC RAYS

SECONDARY COSMIC RAYS SELF MANEUVERING UNm SHOWERS-(CONX) UF MOLIERE FORMULA UF PERSONNEL PROPULSION SYSTEMS RT COSMIC RAY SHOWERS FLOOD PREDICTIONS GS-- IONIZING RADIATION REACTION JET BACKPACKS . COSMIC RAYS SMU (MANEUVERING UNITS) METEOROID SHOWERS . . SECONDARY COSMIC RAYS SPACE SELF MANEUVERING UNITS RAlN RT ATMOSPHERIC RADIATION GS SELF MANEUVERING UNlTS RAlN FORESTS COSMIC RAY ALBEDO . IMLSS RAINSTORMS MSMlC RAY SHOWERS RT ASTRONAUT MANEUVERING EQUIPMENT €kCTRON DECAY RATE EXTRAVEHICULAR ACTIVITY SID (IONOSPHERE DISTURBANCES) ELECTRON PHOTON CASCADES D(TRAMHIcuLAR MOBILITY UNITS USE SUDDEN IONOSPHERIC DISTURBANCES ELEClXON PRECIPITATION MANEWERS PRIMARY COShUC RAYS MANNED MANEUVERING UNITS SIDEREAL TIME SINGLE EVENT UPSETS GS TIME SEMIREGMLM VARIABLE STARS . SIOEREAL TfME GS CELESTIAL BODIES RT ASTRONOMY SEISMOLoaY . STARS EARTH ROTATION GS SEISMOLOGY . . VARIABLE STARS STELLAR MOTIONS . HELIOSEISMOLOGY . . . SEMIREGUUR VARIABLE STARS TIME MEASUREMENT . MOONQUAKES RT IRREGULAR VARIABLE STARS UNITS OF MEASUREMENT RT CRUSTAL FRACTURES PERIODIC VARIATIONS EARTH MOVEMENTS SIDERITE METEORITES EARTHQUAKE DAMAGE SEPAC (PAYLOAD) USE IRON METEORITES EARTHQUAKES UF SPACE EXPER WITH PARTICLE GEOLOGY ACCELERATORS GEOPHYSICS GS PAYLOADS SIGMA ORlONlS ISOSTASY . SEPAC (PAYLOAD) GS CELESTIAL BODIES LARGE APERTURE SEISMIC ARRAY RT a ACCELERATORS . STARS LUNAR GEOLOGY PARTICLE ACCELERATORS . . DOUBLE STARS ROUSE BELTS SPACELAB . . . BINARY STARS mSCIENCE . . . . SIGMA ORlONlS SEISMIC WAVES . . EARLY STARS sm HOT STARS SUBDUCTION (GEOLOGY) USE PROJECT SET1 . . . TIDAL WAVES . . . . B STARS . . . . . SIGMA ORIONIS SEXTANTS . . PECUUAR STARS GS MEASURING INSTRUMENTS . . . SKiMA ORIONIS SELENOQRAPHY . OPTICAL MEASURING INSTRUMENTS RT GEOGRAPHY RT ORION CONSTELLATION . . SEXTANTS STELLAR SYSTEMS LUNAR CRATERS OPTICAL EQUIPMENT LUNAR CRUST . OPTlCAL MEASURING INSTRUMENTS LUNAR LANDING SITES . . SEXTANTS SIKHOTE-ALIN METEORITE LUNAR MAPS RT NAVIGATION AIDS GS CELESTIAL BODIES LUNAR MOBILE LABORATORIES POSITION INDICATORS . METEORITES LUNAR RAYS STADIMETERS . . IRON METEORITES LUNAR ROCKS THEODOLITES SIKHOTE-ALIN METEORITE LUNAR TOPOGRAPHY TRANSITS MOON SINGLE EVENT UPSETS SELENOLOGY SEYFERT GALAXIES GS RADIATION EFFECTS SURFACE PROPERTIES GS CELESTIAL BODIES . SINGLE EVENT UPSETS . GALAXIES RT ASTRlONlCS . . ACTIVE GALAXIES AVIONICS SELENOLOGY . . . SEYFERI O*UXIES CHARGED PARTICLES RT ASTRONOMY RT ACTIVE GALACTIC NUCLEI COSMIC RAYS LUNAR COMPOSITION GALACTIC NUCLEI ELECTRON-HOLE DROPS LUNAR CORE INFRARED RADIATION INNER RADIATION BELT LUNAR CRATERS LINE SPECTRA IONIZATION LUNAR CRUST LUMINOUS INTENSITY MICROELECTRONICS LUNAR DUST MARKARIAN GALAXIES RADIATION DAMAGE LUNAR ECHOES SPIRAL GALAXIES RADIATION DOSAGE LUNAR ECLIPSES STELLAR SPECTRA SATELLITE-BORNE INSTRUMENTS LUNAR EFFECTS ULTRAVIOLET RADIATION SECONDARY COSMIC RAYS LUNAR ENVIRONMENT SPACECRAFT CHARGING LUNAR EQUATOR SPACECRAFT ELECTRONIC EQUIPMENT LUNAR EVOLUTION SHADOWS LUNAR EXPLORATION GS SHADOWS LUNAR FAR SIDE . LUNAR SHADOW SlRTF USE SPACE INFRARED TELESCOPE FACILITY LUNAR FIGURE . PENUMBRAS LUNAR GEOLOGY RT CLOUD COVER LUNAR GRAVITATION CLOUDS (METEOROLOGY) SKY LUNAR GRAVITATIONAL EFFECTS DARKNESS GS SKY LUNAR LIMB ILLUMINATING . NIGHT SKY LUNAR LUMINESCENCE LIGHT (VISIBLE RADIATION) RT CLOUD COVER LUNAR MAGNETIC FIELDS NIGHT CLOUDS (METEOROLOGYI LUNAR MANTLE SELF SHADOWING DAYGLOW LUNAR MARIA UMBRAS RAYLEIGH SCATTERING LUNAR OCCULTATION SUNLIGHT LUNAR PHASES SHORT WAVE RADIATION LUNAR RADAR ECHOES SN (RADIO WAVES) SKY BRIGHTNESS LUNAR RADIATION GS ELECTROMAGNETIC RADIATION GS ELECTROMAGNETIC PROPERTIES LUNAR ROCKS . RADIO WAVES OPTICAL PROPERTIES LUNAR ROTATION . . SHORI WAVE RADIATION SKY BRIGHTNESS LUNAR SEISMOGRAPHS . . . MICROWAVES RT AIRGLOW LUNAR SHADOW . . . . CENTIMETER WAVES AURORAS LUNAR SOIL . . . . DECIMETER WAVES BRIGHTNESS LUNAR SURFACE . . . . MICROWAVE EMISSION CLOUD COVER LUNAR TEMPERATURE . . . . MILLIMETER WAVES DAYTIME LUNAR TIDES . . . SUBMILLIMETER WAVES GEGENSCHEIN LUNAR TOPOGRAPHY RT FAR INFRARED RADIATION GLARE MOON HIGH FREQUENCIES LIGHT (VISIBLE RADIATION) MOONQUAKES LONG WAVE RADIATION LIGHT EMISSION REGOLITH MONOCHROMATIC RADIATION LUMINANCE SELENOGRAPHY co RADIATION NIGHT NIGHT SKY -c SHOWERS NIGHTGLOW SELF DEPLOYING SPACE STATIONS SN (USE OF A MORE SPECIFIC TERM IS SOLAR RADIATION USE SELF ERECTING DEVICES RECOMMENOED-CONSUL T THE TERMS SUNLIGHT SPACE STATIONS LISTED BELOW) ZODIACAL LIGHT SOLAR ACTIVITY

SKY RADIATION SKYUSB 2-(WNZ) SOFT LANDIW(CONX) GS ATMOSPHERIC RADIATION SATURN 18 LAUNCH VEHICLES RT AIRCRAFT LANDING . SKY RADIATION SANRN 5 LAUNCH VEHICLES .D ASTRONAUTICS . . AIRGLOW SPACE MISSIONS CRASH LANDING . . . GEOCORONAL EMISSIONS GLIDE LANDINGS HARD LANDING . . . NIGHTGLOW SKYLAB-~~- - 3 . . . TWILIGHT GLOW UF SL 3 HORIZONTAL SPACECRAFT LANDING . . DAYGLOW GS ARTIFICIAL SATELLITES LUNAR LANDING ELECTROMAGNETIC RADIATION . ORBrrAL WORKSHOPS MARS LANDING . UGHT (VISIBLE RADIATION) . . SKYLAB 3 PLANETARY LANDING . . sm UADUT~OW . SPACE STATIONS SPACECRAFT LANDING . . . AIRGLOW . . SKYLAB 3 SURVEYOR PROJECT . . . . GN)CORONAL EMISSIONS LABORATORIES VIKING 75 ENTRY VEHICLE . . . . NIGHTGLOW . SPACE LABORATORIES WATER LANDING . . . . TWILIGHT GLOW . . MANNED ORBITAL LABORATORIES . . . DAYGLOW . . . SKYUSB 3 SOFT RECOVERY RT BACKGROUND RADIATION MANNED SPACECRAFT USE SOFT LANDING WRANOMETERS . MANNED ORBITAL LABORATORIES *RADIATION . . SKYLAB 3 STRATOSPHERE RADIATION SOILS . ORBITAL WORKSHOPS GS SOILS SUNLIGHT . . SKYLAB 3 ALLUVIUM THERMAL RADIATION . STATIONS . DIRT TROPOSPHERIC RADIATION . SPACE STATIONS . GRAVELS . . SKYLAB 3 . LATERITES SKY SURVEYS (ASTRONOMY) RT AIRLOCK MODULES . LUNAR SOlL GS OBSERVATION COMMAND SERVICE MODULES . . LUNAR DUST . SKY SURVEYS (ASTRONOMY) EREP . MUD SURVEYS MULTIPLE DOCKING ADAPTERS . PERMAFROST . SKY SURVEYS (ASTRONOMY) SATURN 18 LAUNCH VEHICLES . SANDS RT ASTRONOMICAL CATALOGS SATURN 5-LAUNCH VEHICLES . . MONAZITE SANDS ASTRONOMY SPACE MISSIONS . . TAR SANDS INDEXES (DOCUMENTATION) RT ANDESITE NORTHERN SKY SKYLAB 4 ANORTHOSITE SOUTHERN SKY UF SL 4 ATAXITE GS ARTIFICIAL SATELLITES BARREN LAND SKY WAVES :ORBITAL WORKSHOPS BASALT GS ELECTFIOMAGNETIC RADIATION . . SKYUB 4 BEDROCK . RADIO WAVES . SPACE STATIONS BENTONITE . . SKY WAVES . . SKYLAB 4 BOREHOLES . . . WHISTLERS LABORATORIES BRECCIA RT GROUND WAVE PROPAGATION . SPACE LABORATORIES CARBONACEOUS ROCKS IONOSPHERIC NOISE . . MANNED ORBITAL LABORATORIES CLAYS . . . SKYLAB 4 COAL SKYLAB SPACE STATlON (UNMANNED) MANNED SPACECRAFT CONSERVATION USE SKYLAB 1 . MANNED ORBITAL LABORATORIES CULTIVATION ' . . SKYLAB 4 DELTAS SKYUB 1 . ORBITAL WORKSHOPS DlORlTE UF SKYLAB SPACE STATION (UNMANNED) . . SKYUB 4 DUNITE SL 1 STATIO~S EARTH RESOURCES GS ARTIFICIAL SATELUTES . SPACE STATIONS ECLOGITE . ORBITAL WORKSHOPS . . SKYUB 4 ENSTATITE . . SKYLAB 1 RT AIRLOCK MODULES FORMATIONS . SPACE STATIONS COMMAND SERVICE MODULES GEOLOGY . . SKYLAB 1 EREP GNEISS LABORATORIES MULTIPLE DOCKING ADAPTERS GRANITE . SPACE LABORATORIES SATURN 10 LAUNCH VEHICLES IGNEOUS ROCKS . . MANNED ORBITAL LABORATORIES SATURN 5 LAUNCH VEHICLES :'.LITE . . . SKYLAB 1 SPACE MISSIONS KAOLlNlTE MANNED SPACECRAFT LAND . MANNED ORBITAL LABORATORIES SL 1 LANDSLIDES . . SKYLAB 1 USE SKYLAB 1 LAVA . ORBITAL WORKSHOPS LIMESTONE . . SKYUSB 1 SL 2 LYSIMETERS STATIONS USE SKYLAB 2 MAGMA SPACE STATIONS MINERALS . . SKYLAB 1 Sb 3 MOLDAVITE RT AIRLOCK MODULES USE SKYLAB 3 MUSKEGS COMMAND SERVICE MODULES OBSIDIAN OLIVINE EREP SL 4 PERlDOTlTE MULTIPLE DOCKING ADAPTERS USE SKYLAB 4 SPACE MISSIONS PLANTING POLYURETHANE FOAM SMALL AmONOMY SATELLITE 1 POROUS MATERIALS SKYLAB 2 USE SAS-1 PUMICE UF SL 2 PYROXENES GS ARTIFICIAL SATELLITES SMALL ASTRONOMY SATELLITE 2 QUARTZ . ORBITAL WORKSHOPS USE SAM ROCKS . . SKYLAB 2 . SPACE STATIONS SANDSTONES SMALL ASTRONOMY SATELLITE 3 SEDIMENTARY ROCKS SKYLAB 2 . . USE SASS SERPENTINE LABORATORIES SHALES SPACE LABORATORIES . SOlL EROSION . . MANNED ORBITAL LABORATORIES SMALL ASTRONOMY SATELLITES SOlL MAPPING SKYLAB 2 USE SAS . . . SOlL MOISTURE MANNED SPACECRAFT SOlL SCIENCE MANNED ORBITAL LABORATORIES SMM-A STRIP MINING . . SKYLAB 2 USE SOLAR MAXIMUM MISSION-A SYENITE ORBITAL WORKSHOPS TRACHYTE SKYLAB 2 SMU (MANEUVERING UNITS) TUNNELING (EXCAVATION) STATIONS USE SELF MANEUVERING UNITS VADOSE WATER SPACE STATIONS VEGETATION GROWTH . . SKYLAB 2 SOFT LANDING RT AIRLOCK MODULES SN (SPACECRAFT OR AIRCRAFT) COMMAND SERVICE MODULES UF SOFT RECOVERY SOLAR ACTIVITY EREP GS LANDING GS STELLAR ACTIVITY MULTIPLE DOCKING ADAPTERS SOFT LANDING SOLAR ACTIVITY SOLAR ACTIVITY EFFECTS

SOUR MITY-(WNE) SOLAR CORWSCULAR RADIATION-(WNZ) SOUR FLUX . . FACULAE . . SOLAR CORPUSCULAR RADIATION SN (LIMITED TO ENERGY OR PARTICLES . . SOLAR PROMINENCES . . . SOLAR ELECTRONS EMIT~ED FROM THE SUN PER UNIT . . SOLAR STORMS . . . SOLAR NEUTRONS TIME-SEE SOLAR FLUX DENSITY FOR . . SPICULES . . . SOLAR PROTONS ENERGY OR PARTICLE EMISSION OR . . STEUAR FLARES RT M REGION DETECTION RATE PER UNlT AREA) . . . SOLAR FLARES o~ RADIATION RATES (PER TIME) . . SUNSPOTS SOLAR PLANETARY IMERACTIONS . FLUX (RATE) ' RT w ACTIVITY SUDDEN STORM COMMENCEMENTS . . SOUR FWX AURORAS SUN HEAT FLUX w DISTURBANCES UMB BRIGHTENING INTERNATIONAL QUIET SUN YEAR SOUR COEUIK: RAYS SUN IRIS SATELLmS GS mATERRESTRIAL RADIATION MAGNETIC DISTURBANCES . PRIMARY COSMIC RAYS RUX DENSITY PROMINENCES . . SOUR C(WIIlK: RAYS (UMITED TO SOLAR ENERGY OR RADIO AURORAS . SOLAR RADIATION PARTICLE EMISSION OR DETECTION SOLAR INtERlOR . . SOLAR COSUlC RAYS RATE UNIT-AREA-SEE SOLAR FLUX SOLAR PLANETARY INTERACTIONS IONIZING RADlATlON FOR EMISSION RATE PER UNlT TIME) STARSPOTS . COSMIC RAYS RATES (PER TIME) SUN . . PRIMARY COSMIC RAYS FLUX DENSITY ' SUNSPOT CYCLE . . . SOLAR COSMIC RAYS . . RADIANT FLUX DENSITY PARTICLES . . . SOLAR FLUX DENSITY SOLAR ACTlVlTY EFFECTS . CORPUSCULAR RADIATION . . . . SOLAR CONSTANT RT BLACKOUT (PROPAGATION) . . PRIMARY COSMIC RAYS ELECTRON FLUX DENSITY s EFFECTS . . . SOLAR COSMIC RAYS HELIOS SATELLITES GALACTIC COSMIC RAYS RT ELECTRON ACCELERATfON ' ILLUMINANCE HEWSPHERE ENERGETIC PARTICLES IRRADIANCE MAGNETIC DISTURBANCES GRIST (TELESCOPE) UMB BRIGHTENING SECULAR VARIATIONS SUN LUMINANCE S&W OSCILLATIONS LUMINOUS INTENSITY SOLAR PLANETARY INTERACTlONS SOLAR CYCLES PARTICLE FLUX DENSITY SUDDEN IONOSPHERIC DISTURBANCES GS CYCLES PROTON FLUX- DENSITY- SUDDEN STORM COMMENCEMENTS . SOLAR CYCLES RADIANCE SUN . . SUNSPOT CYCLE RADIANCY RT INTERNATIONAL QUIET SUN YEAR RADIATION PRESSURE SOLAR ATMOSPHERE IRIS SATELLITES SUM GS ENVIRONMENTS SECULAR VARIATIONS . EXTRATERRESTRIAL ENVIRONMENTS SUN SOLAR GRANULATION . . STELLAR ATMOSPHERES SUNSPOTS GS PHOTOSPHERE . . SOLAR ATMOSPHERE TWENTY-SEVEN DAY VARIATION . SOLAR GRANULATION RT sATMOSPHERES RT BENARD CELLS CHROMOSPHERE SOLAR DIAMETER BRIGHTNESS DISTRIBUTION M REGION RT ASTROMETRY CONVECTION CURRENTS PHOTOSPHERE r SCIENCE LIMB BRIGHTENING SOLAR OSCILLATIONS SOLAR ECLIPSES SUN SPICULES SURFACE LAYERS STELLAR STRUCTURE SOLAR DISK TEMPERATURE EFFECTS SUN USE SUN SOLAR GRAVITATION SOUR AnMUTn UF WECTION SOLAR DYNAMICS GS GRAVITATION USE AZIMUTH USE HELIOSEISMOLOGY SOLAR POSITION . STELLAR GRAVITATION . . SOLAR GRAVlTATlON SOLAR COMPANION STAR SOUR ECUPSES SUN USE NEMESIS (STAR) GS ECLIPSES . SOLAR ECUPSES SOLAR INSTRUMENTS OCCULTATION GS SOLAR INSTRUMENTS SOUR CONSTANT LUNAR OCCULTATION GS CONSTANTS . . SPECTROHELIOGRAPHS . . SOLAR ECLIPSES CELESCOPES . SOUR CONSTANT RT LUNAR SHAWW RATES (PER TIME) FILTERGRAMS SOLAR DIAMETER . FLUX DENSITY OPTICAL MEASURING INSTRUMENTS . . RADIANT FLUX DENSITY SUN RADIATION MEASURING INSTRUMENTS . . . IRRADIANCE SOLAR OPTICAL TELESCOPE . . . . SOLAR CONSTANT SOLAR ELECTRONS SPECTROMETERS . . . SOLAR FLUX DENSITY GS EXTRATERRESTRIAL RADIATION SUN . . . . SOLAR CONSTANT . SOLAR RADIATION TELESCOPES RT ILLUMINANCE . . SOLAR CORPUSCULAR RADIATION PARTICLE FLUX DENSITY . . . SOLAR ELECTRONS SOLAR INTERIOR SUN PARTICLES GS STELLAR INTERIORS CORPUSCULAR RADIATION . SOLAR INTERIOR SOLAR CORONA . SOLAR CORPUSCULAR RADIATION HELIOSEISMOLOGY UF SOLAR NEBULA . . SOUR ELECTRONS SOLAR ACTIVITY GS CORONAS RT SUN SOLAR PHYSICS . STELLAR CORONAS . . SOLAR CORONA sou* FACULAE . . . CORONAL HOLES USE FACULAE . . . CORONAL LOOPS RT CHROMOSPHERE SOLAR FLARES SOLAR LlMB ELECTRIC CORONA GS STELLAR ACTIVITY RT CORONAL LOOPS MAGNETIC CLOUDS . SOLAR ACTIVITY LlMB BRIGHTENING . STELLAR FLARES LlMB DARKENING . . . SOLAR FLARES r LIMBS RT CORONAL LOOPS PLANETARY LlMB FLARE STARS SUN SOLAR CORPUSCULAR RADIATION -a FLARES UF SOLAR STREAMS a FLASH SOLAR LONGITUDE GS EXTRATERRESTRIAL RADIATION FORBUSH DECREASES GS LONGITUDE SOLAR RADIATION FORCE-FREE MAGNETIC FIELDS SOLAR LONGITUDE SOLAR CORPUSCULAR RADIATION IRIS SATELLITES RT ASTRONOMICAL COORDINATES SOLAR ELECTRONS MAGNETIC DISTURBANCES CELESTIAL REFERENCE S'STEMS . . . SOLAR NEUTRINOS SOLAR MAXIMUM MISSION SUN . . . SOLAR NEUTRONS SOLAR NEUTRONS . . . SOLAR PROTONS SUDDEN STORM COMMENCEMENTS SOLAR MAGNETIC FIELD PARTICLES SUN UF HELIOMAGNETISM . CORPUSCULAR RADIATION SUNSPOTS GS MAGNETIC FIELDS SOLAR RADIATION

SOLAR MAGNETIC FIEW-(CONX) SOLAR NOISE SOLAR PLANETARY INTERACTIONS . STELLAR MAGNETIC FIELDS USE SOLAR RADIO EMISSION GS SOLAR PLANETARY INTERACTIONS . . SOUR MAGNETIC flELD . SOLAR TERRESTRIAL INTERACTIONS RT EARTH MAGNETOSPHERE RT ELECTROMAGNETIC FIELDS SOUR OBLATENESS FORCE-FREE MAGNETIC FIELDS MAGNETIC DISTURBANCES RT OBLATE SPHEROIDS MAGNETOSHEATH INTERPLANETARY MAGNETIC FIELDS SUN MAGNETIC FIELD RECONNECTION PLANETARY ATMOSPHERES SUN PLANETARY MAGNETIC FIELDS SOLAR OBSERVATORIES PLANETARY MAGNETOSPHERES GS OBSERVATORIES PLASMA INTERACTIONS SOUR- MAXIMUM MlSSKm . . SOLAR OBSERVATORIES SOCAR ACTIVITY GS SPACE MISSIONS . . om . SOUR MAXIMUM MISSION ACTIVITY EFFECTS SOLAR MAXIMUM MISSON-A SOLAR CORPUSCULAR RADIATION . . SOLAR WlND RT -FLARES SOLAR WlND VELOCITY FLUX DENSITY GAMMA RAY SPECTROMFTrRS a MISWNS SOLAR PLASMA (RADIATION) USE SOLAR WlND MULTIMlSSlON MODULAR SPACECRAFT ...OSO-5 POLARIMETERS OSO-6 ... SOLAR POSITION PROGRAMS . . . OS0-7 SOLAR FLARES UF SOLAR AZIMUTH . . . OSO-8 GS POSITION (LOCATION) SPACE PROGRAMS . . PINHOLE OCCULTER FACILITY SUN SOLAR POSITION RT CORONAGRAPHS RT ASTROLABES ULTRAVIOLET SPECTROMETERS SUN ULYSSES MISSION CELESTIAL NAVIGATION EQUINOXES SOLAR OPTICAL TELESCOPfl SOLAR..- MAXIMUM MISSION-A SEASONS UF SMMA UF SOT SOLSTICES GS SPACE MISSIONS GS TELESCOPES SUN SPACEBORNE TELESCOPES . SOLAR MAXIMUM MISSION . ZENITH . . SOLAR MAXIWJM MISSION-A . . SOLAR OPTICAL TEWCOPE RT mMlSSlONS RT SOLAR INSTRUMENTS SOLAR PROBES SOLAR PHYSICS SPACE EXPLORATION GS UNMANNED SPACECRAFT a SPACECRAFT . SPACE PROBES SUN SOUR ORBITS . . SOLAR PROBES SN [RESTRICTED TO ORBITS AROUND THE . . . HEUOS A SOLAR MESOSPHERE EXPLORER SUN) . . . HEUOS B GS ARTIFICIAL SATELUTES UF HELIOCENTRIC ORBITS . . . HELIOS 1 . SCIENTIFIC SATELLITES PLANETARY MOTION . . . HELIOS 2 . . EXPLORER SATELLITES GS ORBITS . . . STARPROBE SPACECRAFT . . . SOUR MESOSPHERE EXPLORER . SOLAR ORBITS . . . SUNBLAZER SPACE PROBE RT ATMOSPHERIC COMPOSITION . . APHELIONS RT HELIOS PROJECT MESOSPHERE . . PERIHELIONS PIONEER SPACE PROBES OZONE RT CIRCULAR ORBITS SUN SUN r EARTH MOTION ULYSSES MISSION ECLIPTIC SOLAR NEBULA ELUPTICAL.ORBITS SOLAR PROMINENCES USE SOLAR CORONA HEOS SATELLITES UF FILAMENTS (SOLAR PHYSICS) INTERPLANETARY TRAJECTORIES GS PROMINENCES SOLAR NEIGHBORHOOD MOTION - . SOLAR PROMINENCES ORBITAL RESONANCES (CELESTIAL STELLAR ACTIVITY RT ASTRONOMY MECHANICS) CELESTIAL BODIES . SOLAR ACTIVITY PRO TOP LA NET^ . . SOLAR PROMINENCES LOCAL GROUP (ASTRONOMY) SPACECRAFT ORBITS MILKY WAY GALAXY RT CHROMOSPHERE SUN SUN NEMESIS (STAR) TRANSFER ORBITS SOLAR SYSTEM STAR CLUSTERS SOLAR PROTONS STARS SOLAR OSCILLATIONS GS EXTRATERRESTRIAL RADIATION SUN GS OSCILLATIONS . SOLAR RADIATION . STELLAR OSCILLATIONS . . SOLAR CORPUSCULAR RADIATION SOLAR NEUTRINOS . . SOLAR osclunore . . . SOLAR PROTONS GS EXTRATERRESTRIAL RADIATION STEUAR MOTIONS PARTICLES . SOLAR RADIATION . STELLAR OSCILLATIONS . CHARGED PARTICLES . . SOLAR CORPUSCULAR RADIATION . . SOLAR OSCILLATIONS . . PROTONS . . SOLAR NEUTRINOS RT ASTRONOMICAL MODELS . . . SOLAR PROTONS PARTICLES ATMOSPHERIC MODELS , CORPUSCULAR RADIATION . ELEMENTARY PARTICLES CATACLYSMIC VARIABLES . . SOLAR CORPUSCULAR RADIATION SOLAR ACTIVITY EFFECTS . . FERMIONS . . . SOLAR PROTONS . . . LEPTONS SOLAR ATMOSPHERE , ELEMENTARY PARTICLES . . . . NEUTRINOS STELLAR MODELS . . FERMIONS . . . . . SOLAR NEUTRINOS SUN . . PROTONS RT ASTRONOMICAL MODELS VARIABLE STARS .... SOLAR PROTONS ASTROPHYSICS RT BARYONS NUCLEAR REACTIONS SOLAR PARALLAX SUN STELLAR MODELS GS PARALLAX SUN . SOUR PARALLAX SOLAR RADAR ECHOES RT ASTRONOMY GS ECHOES SOLAR NEUTRONS STELLAR PARALLAX . RADAR ECHOES GS EXTRATERRESTRIAL RADIATION SUN . . SOLAR RADAR ECHOES . SOLAR RADIATION RT SUN . . SOLAR CORPUSCULAR RADIATION SOLAR PHYSICS . . . SOLAR NEUTRONS GS ASTROPHYSICS SOLAR RADIATION PARTICLES . STELLAR PHYSICS GS EXTRATERRESTRIAL RADIATION CORPUSCULAR RADIATION . . SOLAR PHYSICS SOLAR RADIATION SOLAR CORPUSCULAR RADIATION RT FILTERGRAMS . CIRCUMSOLAR RADIATION SOLAR NEUTRONS HELIOSEISMOLOGY . . SOLAR CORPUSCULAR RADIATION . ELEMENTARY PARTICLES INTERNATIONAL QUIET SUN L'EAR . . . SOLAR ELECTRONS FERMIONS PHOTOSPHERE SOLAR NEUTRINOS . . . NEUTRONS z PHYSICS . . SOLAR NEUTRONS . . . . SOLAR NEUTRONS PLASMAS (PHYSICS) . . SOLAR PROTONS NEUTRAL PARTICLES x SCIENCE . SOLAR COSMIC RAYS NEUTRONS SOLAR INTERIOR SOLAR RADIO EMISSION . . . SOLAR NEUTRONS SOLAR OPTICAL TELESCOPE . SOLAR RADIO BURSTS RT NEUTRON FLUX DENSITY SPARTAN SATELLITES . . . . TYPE 2 BURSTS SOLAR FLARES SUN . . . TYPE 3 BURSTS SOLAR RADIATION 1 SATELLITE

SoUR RADIATIoN-(WN%) SOLAR RADIO BURSTS-(WNT.) SOUR ROTA~N~/CON%) . . . . TYPE 4 BURSTS . . . . TYPE 3 BURSTS TWENTY-SEVEN DAY VARIATION . . . . TYPE 5 BURSTS . . . . TYPE 4 BURSTS . . SOLAR WIND . . . . TYPE 5 BURSTS SOLAR SEISMOLO(PY . . SOLAR X-RAYS . . SOLAR RADlO EMISSION USE HEUOSEISMOLOGY . . SUNLIGHT . . . SOLAR RAM0 BURSTS RT AEROSPACE ENVIRONMENTS . . . . TYPE 2 BURSTS SOLAR SENSORS ALBEDO . . . . TYPE 3 BURSTS UF SUN SENSORS ATMOSPHERIC REFRACTION . . . . TYPE 4 BURSTS RT AlTlTUDE CONTROL CIRCUMSOLAR TELESCOPES . . . . TYPE 5 BURSTS GUIDANCE SENSORS CUMATOLOOY EXTRATWRESTRIAL RADIATION IRIS SATELLITES CLOUD COVER . EXTRATWRESTRIAL RADIO WAVES NAVIGATION AIDS CORPUSCULAR RADIATION . . RADIO BURSTS NAVIGATION INSTRUMENTS COSMIC NOISE . . . SOUR RADIO BURSTS STAR TRACKERS COSMIC RAYS . . . . TYPE 2 BURSTS SUN DAYGLOW . . . . TYPE 3 BURSTS TRACKING (POSITION) ELECTROMAGNETIC RADIATION . . . . TYPE 4 BURSTS EXTREME ULTRAVIOLET RADIATION . . . . TYPE 5 BURSTS GEGENSCHEIN . . SOLAR RADlO EMISSION SOLAR SIMULATION INFRARED RADIATION . . . SOLAR RADlO BURSTS GS SIMULATION SOLAR SIMULATION INSOLATION . . . . TYPE 2 BURSTS . RT SPACE ENVIRONMENT SIMULATION IONIZING RADIATION . . . . TYPE 3 BURSTS SUN IRIS SATELLITES . . . . TYPE 4 BURSTS THERMAL SIMULATION LIGHT (VISIBLE RADIATION) . . . . TYPE 5 BURSTS LONG WAVE RADIATION . SOLAR RADIATION LONGITUDINAL WAVES . . SOLAR RADlO EMISSION SOLAR SIMULATORS m RADIATION . . . SOLAR RADIO BURSTS GS SIMULATORS RADIATION BELTS . . . . TYPE 2 BURSTS . ENVIRONMENT SIMULATORS RADIATION PRESSURE . . . . TYPE 3 BURSTS . . SOLAR SIMULATORS RADIATIVE TRANSFER . . . . TYPE 4 BURSTS RT SPACE SIMULATORS RADIO WAVES . . . . TYPE 5 BURSTS SUN REMNNAS RT SUN TEST FACILITIES SKY BRIGHTNESS SOLAR-PUMPED LASERS SOUR RADIO EMISSION SOLAR SPECPRA STELLAR RADIATION UF SOLAR NOlSE GS SPECTRA SUN SOLAR RADlO WAVES . RADIATION SPECTRA THERMAL RADIATION GS ELECTROMAGNETIC RADIATION . . ELECTROMAGNETIC SPECTRA ULTRAVIOLET RADIATION . RADIO WAVES . . . STELLAR SPECTRA ZODIACAL LIGHT . . EXTRATERRESTRIAL RADlO WAVES . . . . SOLAR SPECTRA . . . SOLAR RADIO EMISSION RT ABSORPTION SPECTRA SOLAR RADIATION 1 SATELLITE . . . . SOLAR RADlO BURSTS ASTRONOMICAL SPECTROSCOPY GS ARTIFICIAL SATELLITES . . . . . TYPE 2 BURSTS CONTINUOUS SPECTRA . SOLAR RADIATION 1 SATELLITE . . . . . TYPE 3 BURSTS CORONAS RT GALACTIC RADIATION . . . . . TYPE 4 BURSTS D LINES .r RADIATION . . . . . TYPE 5 BURSTS EMISSION SPECTRA SUN . . RADIO EMISSION FILTERGRAMS . . . SOLAR RADIO EMISION FRAUNHOFER LINES . . . . SOLAR RADIO BURSTS H ALPHA LlNE SOUR RADIATION 3 SATELLITE . . . . . TYPE 2 BURSTS H BETA LlNE GS ARTIFICIAL SATELLITES . . . . . TYPE 3 BURSTS H GAMMA LlNE . SOUR RAMATION 3 SATELLITE . . . . . TYPE 4 BURSTS H LINES RT GALACTIC RADIATION . . . . . TYPE 5 BURSTS INFRARED SPECTRA m RADIATION EMISSION LlNE SPECTRA SUN . RADlO EMISSION LYMAN SPECTRA . . SOUR RADIO EMISSION MOLECULAR SPECTRA SOLAR RADIO BURSrS . . . SOLAR RADlO BURSTS OXYGEN SPECTRA GS BURSTS . . . . TYPE 2 BURSTS SUN . RADIO BURSTS . . . . TYPE 3 BURSTS ULTRAVIOLET SPECTRA . . SOLAR RADIO BuRsrs . . . . TYPE 4 BURSTS VISIBLE SPECTRUM . . . TYPE 2 BURSTS . . . . TYPE 5 BURSTS X RAY SPECTRA . . . TYPE 3 BURSTS EXTRATERRESTRIAL RADIATION . . . TYPE 4 BURSTS , EXTRATERRESTRIAL RADlO WAVES SOLAR SPECTROMETERS . . . TYPE 5 BURSTS . . SOUR RADIO EMISSION GS MEASURING INSTRUMENTS ELECTROMAGNETIC RADIATION . . . SOLAR RADlO BURSTS . RADIATION MEASURING INSTRUMENTS . RADlO WAVES . . . . TYPE 2 BURSTS . . ACTINOMETERS . . EXTRATERRESTRIAL RADlO WAVES . . . . TYPE 3 BURSTS . . . SOLAR SPECTROMETERS . . . RAQlO BURSTS . . . . TYPE 4 BURSTS . SPECTROMETERS . . . . SOLAR RADlO BURSTS . . . . TYPE 5 BURSTS . . SOUR SPECTROMETERS . . . . . TYPE 2 BURSTS . SOLAR RADIATION AT ABSORPTION SPECTRA . . . . . TYPE 3 BURSTS . . SOUR RADIO EMlSSlON EMISSION SPECTRA . . . . . TYPE 4 BURSTS . . . SOLAR RADlO BURSTS FILTER WHEEL INFRARED . . . . . TYPE 5 BURSTS . . . TYPE 2 BURSTS SPECTROMETERS . . . SOLAR RADlO EMISSION . . . . TYPE 3 BURSTS INFRARED SPECTROMETERS . . . . SOLAR RADlO BURSTS . . . . TYPE 4 BURSTS SPECTROHELIOGRAPHS . . . . . TYPE 2 BURSTS . . . . TYPE 5 BURSTS SUN . . . . . TYPE 3 BURSTS RT CORONAL HOLES ULTRAVIOLET SPECTROMETERS . . . . . TYPE 4 BURSTS COSMIC NOlSE . . . . . TYPE 5 BURSTS DECIMETER WAVES SOLAR STORMS . . RADlO EMISSION ELECTROMAGNETIC NOISE GS STELLAR ACTIVITY . . . RADlO BURSTS MILLIMETER WAVES . . . . SOUR RADIO BURSTS . SOLAR ACTIVITY RADlO BURSTS SOLAR STORMS . . . . . TYPE 2 BURSTS . . STORMS . . . . . TYPE 3 BURSTS SOLAR RADIO WAVES SOLAR STORMS . . . . . TYPE 4 BURSTS . USE SOLAR RADlO EMISSION RT FORBUSH DECREASES . . . . . TYPE 5 BURSTS . . . SOLAR RADlO EMISSION IONOSPHERIC STORMS . . . . SOLAR RADlO BURSTS SOLAR ROTATION MAGNETIC STORMS . . . . . TYPE 2 BURSTS UF CARRINGTON ROTATION NOISE STORMS SUN . . . . . TYPE 3 BURSTS GS GYRATION . . . . TYPE 4 BURSTS ROTATION . . . . . TYPE 5 BURSTS STELLAR ROTATION SOLAR STREAMS EMISSION . . . SOLAR ROTATION USE SOLAR CORPUSCULAR RADIATION RADlO EMISSION STELLAR MOTIONS . . RADlO BURSTS . STELLAR ROTATION SOLAR SYSTEM . . . . SOLAR RADIO BURSTS . . SOLAR ROTATION GS CELESTIAL BODIES . . . . TYPE 2 BURSTS RT SUN SOLAR SYSTEM SPACE DETECTION AND TRACKING SYSTEM

SOLAR SYSTEM-(CONE) SOUR WIND-(CONE) SOUNDING ROCKETS-(CONE) PLANETARY SYSTEMS M REGION . . SKUA ROCKET VEHICLES . SOLAR SYSTEM MAGNETIC CLOUDS . . SKYLARK ROCKET VEHICLE RT AMALTHEA MAGNETOPAUSE . . VENUS FLY TRAP ROCKET VEHICLE AMOR ASTEROID MAGNETOSHEATH . . VERONIQUE ROCKET VEHICLES AWLLO ASTEROIDS PLASMAPAUSE . . VERTICAL 8 ROCKET AREND-ROLAND COMET mRADlATlON . . WASP SOUNDING ROCKET ASTEROID BELTS RADIATION PRESSURE RT ACOUSTIC SOUNDING ASTEROID CAPTURE SOLAR PLANETARY INTERACTIONS ARGO ROCKET VEHICLES ASTEROIDS STrLLAR WINDS IONOSONDES CELESTIAL MECHANICS SUN JAVEUN ROCKET VEHICLE CHARON METEOROLOGICAL INSTRUMENTS CHlRON SOUR WIND VUOCITT METEOROLOGICAL SATELLITES COMET HEADS GS RATES (PER TlMB NIKE-JAVELIN ROCKET VEHICLE COMET NUCLEI . FLOW VELOCITY PAYLOAD CONTROL COMET TAILS . . 501451 WIND VELOCITY RADIOSONDES COMETS . WlND VELOCI; Y ROCKET SOUNDING EARTH-MOON SYSTEM . . SOLAR WlND VELOCITY SONDES GAS GIANT PLANETS VEL~CITY VIKING ROCKET VEHICLE GRIGG-SKJELLERUP COMET . FLOW VELOCITY HALLEY'S COMET . . SOLAR WlND VELOCITY SOUTHERN SKY IRASARAKI-ALCOCK COMET . WlND VELOCITY RT ASTRONOMICAL CATALOGS JUPITER SATELLITES . . SOLAR WlND VELOCITY ASTRONOMICAL OBSERVATORIES KOHOUTEK COMET RT ALPHA PARTICLES ASTRONOMICAL PHOTOGRAPHY MERCURY SURFACE EARTH MAGNETOSPHERE ASTRONOMICAL SPECTROSCOPY METEOROIDS MAGNETIC DISTURBANCES ASTRONOMY NATURAL SATELUTES MAGNETOHYDRODYNAMIC FLOW NORTHERN SKY OORT CLOUD SOCAR PLANETARY INTERACTIONS SKY SURVEYS (ASTRONOMY) PLANETARY GEOLOGY STELLAR WINDS SOUTHERN HEMISPHERE PLANETS SUN PROTOPLANETS VELOCITY MEASUREMENT w SPACE RHEA lASTRONOMYl SN (USE OF A MORE SPECIFIC TERM IS SATURN RINGS . SOLAR X-RAYS RECOMMENDED-CONSULT THE TEf?MS SOLAR NEIGHBORHOOD GS ELECTROMAGNETIC RADIATION LISTED BELOW SUN X RAYS RT ALGEBRA mSY STEMS . SOLAR X-RAYS ANALYSIS (MATHEMATICS) TEMPEL 2 COMET . . EXTRATERRESTRIAL RADIATION CARTAN SPACE TERRESTRIAL PLANETS SOLAR RADIATION CISLUNAR SPACE TOR0 ASlEROlD . SOLAR X-RAYS DEEP SPACE VENUS SURFACE . . IONIZING RADIATION FRACTALS VESTA ASTEROID X RAYS FUNCTION SPACE VOYAGER 1977 MISSION SOLAR X-RAYS HYPERSPACES WEST COMET . . RT CORONAL HOLES SET THEORY SUN SPATIAL DEPENDENCIES SOLAR TEMPERATURE GS TEMPERATURE SOUD ROTATION SPACE BIOLOGY . SOLAR TEMPERATURE USE ROTATING BODIES USE EXOBIOLOGY RT SUN SPACE CHARGE SOLAR TERRESTRIAL INTERACTIONS GS ELECTRIC CHARGE GS SOLAR PLANETARY INTERACTIONS SEASONS . SPACE CHARGE . SOLAR TERRESTRIAL INTERACTKlNS SOLAR POSITION RT BUNCHING RT CORPUSCULAR RADIATION SUMMER CHILD-LANGMUIR LAW EARTH MAGNETOSPHERE WINTER ELECTRIC DISCHARGES sFLARES ELECTRON CLOUDS LANDAU DAMPING .o INTERACTIONS SOT MAGNETOHYDRODYNAMICS INTERNATIONAL USE SOLAR OPTICAL TELESCOPE GEOSPHERE-BIOSPHERE PROGRAM NONOHMIC EFFECT MAGNETIC DISTURBANCES ORBITRONS MAGNETIC STORMS SOUNDING ROCKETS PERVEANCE MAGNETOSHEATH UF METEOROLOGICAL ROCKETS PLASMAS (PHYSICS) STORMS ROCKET SONDES STATIC ELECTRICITY SUN GS ROCKET VEHICLES . SOUNDING ROCKETS SUNSPOTS SPACE DENSITY WEATHER . . AEROBEE ROCKET VEHICLE . . ANTARES ROCKET VEHICLE GS DENSITY (MASSIVOLUME) . . APACHE ROCKET VEHICLE . SPACE DENSITY DENSITY (NUMBERIVOLUME) SOLAR VELOCITY . . ARCAS ROCKET VEHICLES GS RATES (PER TIME) . . ARIES SOUNDING ROCKET . SPACE DENSITY . SOLAR VELOCITY . . ASP ROCKET VEHICLE RT ATMOSPHERIC DENSITY VELOCITY . . ASTROBEE ROCKET VEHICLES ELECTRON DENSITY (CONCENTRATION) . SOLAR VELOCITY . . . ASTROBEE 1500 ROCKET VEHICLE ION DENSITY (CONCENTRATION) RT SUN . . BLACK BRANT SOUNDING ROCKETS PARTICLE DENSITY (CONCENTRATION) . . . BLACK BRANT 1 SOUNDING PLASMA DENSITY SOLAR WlND ROCKET PLASMA INTERACTION EXPERIMENT .UF SOLAR PLASMA (RADIATION) . . . BLACK BRANT 2 SOUNDING PROTON DENSITY (CONCENTRATION) GS EXTRATERRESTRIAL RADIATION ROCKET . SOLAR RADIATION BLACK BRANT 3 SOUNDING SPACE DEl'ECTlON AND TRACKING SYSTEM . . SOLAR WlND ROCKET UF SPADATS (TRACKING SYSTEM) PARTICLES BLACK BRANT 4 SOUNDING GS STATIONS . CHARGED PARTICLES ROCKET . GROUND STATIONS . . ENERGETIC PARTICLES BLACK BRANT 5 SOUNDING . SPACE DETECTION AND TRACKING . . . PLASMAS (PHYSICS) ROCKET SYSTEM . . . . SPACE PLASMAS CAJUN ROCKET VEHICLE . TRACKING STATIONS ...... SOLAR WlND DORNIER PARAGLIDER ROCKET SPACE DETECTION AND TRACKING RT AMPTE (SATELLITES) VEHICLE SYSTEM CHAPMAN-FERRARO PROBLEM . . EXOS SOUNDING ROCKET TRACKING (POSITION) COMET TAILS . JAGUAR ROCKET VEHICLE SPACE DETECTION AND TRACKING CORONAL HOLES . . JUDI-DART ROCKET SYSTEM COSMIC PLASMA . . KAPPA ROCKET VEHICLES TRACKING NETWORKS GALACTIC COSMIC RAYS . . . KAPPA 8 ROCKET VEHICLE SPACE DETECTION AND TRACKING GRIGG-SKJELLERUP COMET . . . KAPPA 9 ROCKET VEHICLE SYSTEM HELIOSPHERE . . LAMBDA ROCKET VEHICLES RT MINITRACK SYSTEM HYDROGEN PLASMA . LOKl ROCKET VEHICLE MISSILE TRACKING INTERPLANETARY GAS . PETREL SOUNDING ROCKET OPTICAL TRACKING INTERPLANETARY MEDIUM . PHOENIX SOUNDING ROCKET PHOTOGRAPHIC TRACKING SPACE ENVlRONhiENt

SPACE DETECT~ON AND TRACKING-(CONK) SPACE INFRARED ~EESCOPE-(WNX) SPACE PLISU*~-(CONX) POLYSTATION DOPPLER TRACKING RT INFRARED ASTRONOMY PLASMA DIAGNOSTICS SYSTEM SPACEBORNE ASTRONOMY PLASMA INTERACTIONS SPACECRAFT TRACKING PLASMA LAYERS STDN (NETWORK) SPACE MECHANICS PLASMA PHYSICS mSYSTEMS GS CLASSICAL MECHANICS PLASMA WAVES . SPACE MECHANICS PLASMA-ELECTROMAGNETIC SPACE ENVIRONMENT . . ASTRODYNAMICS IPrrrRACTlON USE AEROSPACE ENVIRONMENTS . . CELESTIAL MECHANICS POLAR CUSPS . . ORBITAL MECHANICS SPHINX SPICE WVIRMSYEWT SlYUUTlOW . . . KEPLER LAWS GS SIMULATION . . . MINIMUM VARIANCE ORBIT SPACE PROBES ENVIRONMENT SIMULATION DETrRMlNATlON GS UNMANNED SPACECRAFT . RT FUGHT MECHANICS . SPACE PROBES . . SPACE EWVIRONMEW SllYWATlQN 18 . . . WEIGHTLESSNESS SIMULATION MAGNETOHYMIODYNAMICS . . EXPLORER SATELLITE . . . . NEUTRAL BUOYANCY SIMULATION ORBITAL SPACE TESTS . . GlOTTO MISSION RT ALTITUDE SIMULATION WADRATURES . . JUPITER PROBES ATMOSPHERIC ENTRY SIMULATION . . . GAULEO PROBE FLIGHT SIMULATION SPACE MISSIONS . . . GALILEO SPACECRAFT FLIGHT SIMULATORS GS "PACE MlSSiONS . . LUNAR PROBES HIGH VACUUM ORBITAL SIMULATOR . FLYBY MISSIONS . . . LUNlK LUNAR PROBES LANGLEY COMPLEX COORDINATOR ASTEROID MISSIONS . . . . LUNlK 2 LUNAR PROBE MOTION SIMULATORS GIOTTO MISSION . . . LUNIK 3 LUNAR PROBE SOLAR SIMULATION . GRAND TOURS . . . . LUNlK 9 LUNAR PROBE THERMAL SIMULATION . . . MARINER JUPITER-SATURN FLYBY . . . . LUNlK 10 LUNAR PROBE VACUUM CHAMBERS . . . MARINER JUPITER-URANUS FLYBY . . . . LUNlK 11 LUNAR PROBE . . . VOYAGER isn WSSION . . . . LUNlK 12 LUNAR PROBE MARINER VENUS-MERCURY 1973 . . . . LUNlK 13 LUNAR PROBE SPACE WITH PARTICLE ACCELERATORS . . EXPER 1973 . LUNlK 14 LUNAR PROBE USE SEPAC (PAYLOAD) . . MARINER-MERCURY . . . . MANNED MARS MISSIONS . . . . LUNlK 16 LUNAR PROBE . SOLAR MAXIMUM MISSION . . . . LUNlK 17 LUNAR PROBE SPACE EXPLORATION . . SOLAR MAXIMUM MISSION-A . . . . LUNIK 19 LUNAR PROBE UF PLANETARY EXPLORATION . STARPROBE MISSION . . . . LUNIK 20 LUNAR PROBE GS EXPLORATION . ULYSSES MISSION . . . . LUNlK 22 LUNAR PROBE . SPACE EXPUNIATlQN APOLLO SOYUZ TEST PROJECT . . . RANGER LUNAR PROBES RT AEROSPACE ENVIRONMENTS CHINESE SPACE PROGRAM L. . . . . RANGER LUNAR LANDING ASTEROID MISSIONS EARTH-VENUS TRAJECT RlES VEHICLES ASTRODYNAMICS EUROPEAN SPACE PROaAMs . . . RANGER 1 LUNAR PROBE mASTRONAUTICS . FRENCH SPACE PROGRAMS . . . . RANGER 2 LUNAR PROBE BIOASTRONAUTICS INDIAN SPACE PROGRAM ....RANGER 3 LUNAR PROBE EYJRATERRESTRIAL ENVIRONMENTS JAPANESE SPACE PROGRAM . . . . RANGER 4 LUNAR PROBE EXTRATERRESTRIAL RESOURCES MAGELLAN PROJECT (NASA) . . . . RANGER 5 LUNAR PROBE FRENCH SPACE PROGRAMS s MISSIONS . . . . RANGER 6 LUNAR PROBE GULUVER PROGRAM SKYLAB 1 . . . . RANGER 7 LUNAR PROBE INTERPLANETARY FLIGHT SKYLAB 2 .... RANGER 8 LUNAR PROBE INTERPLANETARY SPACECRAFT SKYLAB 3 . . . . RANGER 9 LUNAR PROBE INTERSTELLAR SPACECRAFT SKYLAB 4 . . SURVEYOR LUNAR PROBES JUPITER RINGS . SPACE SHUTTLE MISSIONS . . . . SURVEYOR 1 LUNAR PROBE LUNAR EXPLORATION =SPACECRAFT . . SURVEYOR 2 LUNAR PROBE MAGELLAN PROJECT (NASA) . . TOPS (SPACECRAFT) . . . . SURVEYOR 3 LUNAR PROBE MANNED MARS MISSIONS . . . . SURVEYOR 4 LUNAR PROBE MANNED SPACE FLIGHT SPACE OeSERVATIONS (FROM EARTH) . . . . SURVEYOR 5 LUNAR PROBE MARS 69 PROJECT . . . . SURVEYOR 6 LUNAR PROBE MARS 71 PROJECT GS OBSERVATION . SPACE OBSERVATIONS (FROM . . . . SURVEYOR 7 LUNAR PROBE PLANETARY BASES . . MARINER SPACE PROBES PLANETARY COMPOSITION URm) RT DETECTION . . . MARINER R 2 SPACE PROBE PLANETARY GEOLOGY . . . MARINER 1 SPACE PROBE SOLAR MAXIMUM MISSION-A RADIO OBSERVATION RECONNAISSANCE . . . MARINER 2 SPACE PROBE TOPS (SPACECRAFT) . MARINER 3 SPACE PROBE VlKlNG LANDER SPACECRAFT SPACE SURVEILLANCE (GROUND . . BASED) . . . MARINER 4 SPACE PROBE VlKlNG LANDER 1 MARINER 5 SPACE PROBE VlKlNG LANDER 2 VISUAL OBSERVATION ...... MARINER 6 SPACE PROBE VlKlNG MARS PROGRAM . . MARINER 7 SPACE PROBE VlKlNG ORBITER SPACECRAFT SPACE OPERATIONS CENTER (NASA) . . . . MARINER 8 SPACE PROBE VIKING ORBITER 1 GS ARTIFICIAL SATELLITES . . . MARINER 9 SPACE PROBE VlKlNG ORBITER 2 . SPACE STATIONS . . . MARINER 10 SPACE PROBE VlKlNG 1 SPACECRAFT . . SPACE OPERATIONS CENTER (NASA) . . . MARINER 11 SPACE PROBE VlKlNG 2 SPACECRAFT MANNED SPACECRAFT . SPACE OPERATIONS CENTER (NASA) . . MARINER SPACECRAFT . . . MARINER C SPACECRAFT SPACE HABITATS STATIONS . SPACE STATIONS . . . MARINER VENUS 67 SPACECRAFT RT AEROSPACE ENVIRONMENTS . . MARS PROBES CLOSED ECOLOGICAL SYSTEMS . . SPACE OPERATIONS CENTER (NASA) RT LARGE SPACE STRUCTURES . . . ADVANCED RECONN ELECTRIC LIFE SUPPORT SYSTEMS SPACECRAFT SPACE COLONIES ORBITAL ASSEMBLY ORBITAL SERVlClNG . . . MARINER 3 SPACE PROBE SPACE STATIONS . . . MARINER 4 SPACE PROBE SPACECREWS . . . MARINER 6 SPACE PROBE SPACE PHOTOGRAPHY . . . MARINER 7 SPACE PROBE SPACE INFRARED TELESCOPE FACILITY USE SPACEBORNE PHOTOGRAPHY . . . MARINER 8 SPACE PROBE I- IF. -SInTF...... MARINER 9 SPACE PROBE GS ARTIFICIAL SATELLITES SPACE PUSMAS . . . MARS OBSERVER . SCIENTIFIC SATELLITES GS PARTICLES . . MARS 1 SPACECRAFT . . ASTRONOMICAL SATELLITES . CHARGED PARTICLES . . . MARS 2 SPACECRAFT . . . SPACE INFRARED TELESCOPE . . ENERGETIC PARTICLES . . MARS 3 SPACECRAFT FACILITY . . PLASMAS (PHYSICS) . . MARS 4 SPACECRAFF OBSERVATORIES . . . . SPACE PLASMAS . . . MAfiS 5 SPACECRAFT ASTRONOMICAL OBSERVATORIES . . . . . SOLAR WIND . . MARS 6 SPACECRAFT . . ASTRONOMICAL SATELLITES . . . . . STELLAR WINDS . . . MARS 7 SPACECRAFT ..SPACE INFRARED TELESCOPE RT AMPTE (SATELLITES) VIKING SPACECRAFT FACILIN EARTH MAGNETOSPHERE . . . VlKlNG LANDER SPACECRAFT TELESCOPES GEOMAGNETISM . . . . . VlKlNG LANDER 1 . INFRARED TELESCOPES IONOPAUSE . . . VlKlNG LANDER 2 SPACE INFRARED TELESCOPE MAGNETIC FIELD. RECONNECTION VlKlNG ORBITER SPACECRAFT FACIUN MAGNETOHYDRODYNAMIC STABILITY . . . . . VlKlNG ORBITER 1 . SPACEBORNE TELESCOPES MAGNETOHYDRODYNAMICS . . . . . VlKlNG ORBITER 2 . . SPACE INFRARED TELESCOPE OPEN PROJECT . . . . VlKlNG ORBITER 1975 FACIUTY PLASMA DENSITY . . . . VlKlNG 1 SPACECRAFT SPACETEMPERATURE

SPACE PROBES-(wN~) SPACE PROGRAW(CONT) SPACE SHURLE PAYLOAOS-(CONT) . . . . . VlKlNG LANDER 1 . . . . EARTH RESOURCES SURVEY . . X RAY ASTROPHYSICS FACILITY . . . . . VlKlNG ORBITER 1 PROGRAM RT COMMERCE LAB . . . . VlKlNG 2 SPACECRAFT . . . . . SEASAT PROGRAM EXTRAVEHICULAR ACTIVITY . . . . . VlKlNG LANDER 2 . . . ECHO PROJECT FEATURE IDENTIFICATION AND . . . . . VlKlNG ORBITER 2 . . . GALILEO PROJECT LOCATION EXPER . . . ZOND 2 SPACE PROBE . . . GEMINI PROJECT HUBBLE SPACE TELESCOPE . . PIONEER SPACE PROBES . . . HEUOS PROJECT ORBITAL SERVICING . . . PIONEER VENUS 2 ENTRY PROBES . . . JUPITER PROJECT PAYLOAD ASSIST MODULE . . . . PIONEER VENUS 2 NIGHT PROBE . . . MAGEUAN PROJECT (NASA) PAYLOAD INTEGRATION . . . . PIONEER VENUS 2 SOUNDER . . . MARINER PROGRAM PAYLOAD INTEGRATION PLAN PROBE . . . . MARINER VENUSMERCURY 1973 SHUTTLE IMAGING RADAR . . . PIONEER 1 SPACE PROBE . . . . MARINER-MERCURY 1973 SORTIE SYSTEMS . . . PIONEER 2 SPACE PROBE . . . MARS 69 PROJECT SPACE STATION PAYLOADS . . . PIONEER 3 SPACE PROBE . . . MARS 71 PROJECT SPACE TECHNOLOGY EXPERIMENTS . . . PIONEER 4 SPACE PROBE . . . MERCURY PROJECT SPACE TRANSPORTATION SYSTEM . . . PIONEER 5 SPACE PROBE . . . NATIONAL LAUNCH VEHICLE SPACEBORNE EXPERIMENTS . . . PIONEER 6 SPACE PROBE PROGRAM STARLAB . . . PIONEER 7 SPACE PROBE . . . NEW MOONS PROJECT . . . PIONEER 8 SPACE PROBE . . . NIMBUS PROJECT SPACE STATION PAYLOADS . . . PIONEER 9 SPACE PROBE . . . OPEN PROJECT GS PAYLOADS . . . PIONEER 10 SPACE PROBE . . PIONEER PROJECT . SPACE STATION PAYLOADS . . . PIONEER 11 SPACE PROBE . . . PROJECT SET1 RT EARTH OBSERVING SYSTEM (EOS) . . SOLAR PROBES . . . RANGER PROJECT SPACE SHUTTLE PAYLOADS . . . HELIOS A . . . . AGENA B RANGER PROGRAM SPACE STATION POLAR PLATFORMS . . . HELIOS B . . . ROVER PROJECT SPACE STATIONS . . . HELIOS 1 . . . SAIL PROJECT SPACELAB PAYLOADS . . . HELIOS 2 . . . SANRN PROJECT . . . STARPROBE SPACECRAFT . . . SCOUT PROJECT SKYLAB PROGRAM SPACE STATIONS . . . SUNBWER SPACE PROBE . . . EARTH ORBITING SPACE STATIONS STARPROBE MISSION UF . . VENUS PROBES . . . MANNED ORBITAL SPACE STATIONS SURVEYOR PROJECT . . . MAGEUAN SPACECRAFT (NASA) . . . MOSS (SPACE STATIONS) SYNCHRONOUS COMMUNICATIONS . . . MARINER 1 SPACE PROBE . . . SELF DEPLOYING SPACE STATIONS SATELLITE PROJ . . . MARINER 2 SPACE PROBE ARTIFICIAL SATELLITES . TEKTlTE PROJECT GS . . . MARINER 5 SPACE PROBE . . . SPACE STAWNS . . . MARINER 10 SPACE PROBE . . . TlROS PROJECT TITAN PROJECT . . COLUMBUS SPACE STATION . . . VENERA SATELLITES . . . HALO ORBIT SPACE STATION VANGUARD PROJECT ...... VENERA 2 SATELUTE . . . . MIR SPACE STATION VlKlNG MARS PROGRAM . . . . . VENERA 3 SATELLITE . . . ORBITING LUNAR STATIONS . . VOYAGER PROJECT ...... VENERA 4 SATELLITE . SALYUT SPACE STATION . . SAUDI ARABIAN SPACE PROGRAM ...... VENERA 5 SATELLITE SKYLAB 1 SWEDISH SPACE PROGRAM ...... VENERA 6 SATELLITE . . . . SKYLAB 2 . . . . VENERA 7 SATELLITE . . SWISS SPACE PROGRAM . . U.S.S.R. SPACE PROGRAM . . SKYLAB 3 . . . . VENERA 8 SATELLITE . . SKYLAB 4 . UK SPACE PROGRAM . . . VENERA 9 SATELLITE . . . SPACE OPERATIONS CENTER (NASA) . . . . VENERA 10 SATELLITE AT APOLLO SOYUZ TEST PROJECT . . SPACE STATION POLAR PLATFORMS EUROPEAN SPACE AGENCY . . . . VENERA 11 SATELLITE STATIONS . . . . VENERA 12 SATELLITE ISRO MANNED SPACE FLIGHT . SPACE STATIONS . . . ZOND 1 SPACE PROBE . . COLUMBUS SPACE STATION . . . ZOND 3 SPACE PROBE NASA PROGRAMS . HALO ORBIT SPACE STATION m RESEARCH PROJECTS . . . . ZOND 4 SPACE PROBE MIR SPACE STATION SOLAR MAXIMUM MISSION . . . . . ZOND 5 SPACE PROBE . . ORBITING LUNAR STATIONS . . . ZOND 6 SPACE PROBE . . SALYUT SPACE STATION ZOND 7 SPACE PROBE . . . SPACE RADIATION . . SKYLAB 1 ZOND 8 SPACE PROBE . . . USE EXTRATERRESTRIAL RADIATION . . SKYLAB 2 . VOYAGER 1 SPACECRAFT . . . SKYLAB 3 VOYAGER 2 SPACECRAFT . . . SKYLAB 4 RT ATLAS ABLE 5 LAUNCH VEYICLE SPACE RENDEZVOUS . UF SPACECRAFT RENDEZVOUS . . SPACE OPERATIONS CENTER (NASA) INTERPLANETARY SPACECRAFT . . SPACE STATION POLAR PLATFORFAS MAGNETIC PROBES GS RENDEZVOUS AEPS MANEUVERABLE SPACECRAFT . SPACE RENWVOUS BIOASTRONAUTICS MARINER PROGRAM . . ORBITAL RENDEZVOUS EARTH ORBITAL RENDEZVOUS FERRY SPACECRAFT METEOROLOGICAL SATELLITES . . . LUNAR ORBITAL RENDEZVOUS INFLATABLE STRUCTURES PIONEER PROJECT . . . AT APOLLO SOYUZ TEST PROJECT LARGE SPACE STRUCTURES PIONEER VENUS SPACECRAFT MANNED ORBITAL LABORATORIES PIONEER VENUS 1 SPACECRAFT RENDEZVOUS TRAJECTORIES SPACECRAFT DOCKING MANNED SPACECRAFT .a PROBES MILITARY SPACECRAFT RADIO OCCULTATION TRANSFER ORBITS ORBITAL SERVICING SATELLITE TELEVISION ORBITAL SPACE TESTS VOYAGER PROJECT SPACE SEU: MANEUVERING UNITS ORBITAL WORKSHOPS VOYAGER 1977 MISSION USE SELF MANEUVERING UNITS r PLATFORMS RENDEZVOUS SPACECRAFT SPACE PROGRAMS SPACE SHUTTLE PAYLOADS SATURN WORKSHOPS GS PROGRAMS GS PAYLOADS SATURN 1 WORKSHOP . SPACE PROGRAMS SPACE SHUTTLE PAYLOADS SATURN 5 WORKSHOP . . BRAZILIAN SPACE PROGRAM . . ADVANCED TECHNOLOGY SORTIE SYSTEMS . . CANADIAN SPACE PROGRAM LABORATORY SPACE BASES . . . ALOURTE PROJECT . . ASTRO MISSIONS (STS) SPACE COLONIES . . CHINESE SPACE PROGRAM . . ATMOSPHERIC GENERAL SPACE HABITATS . . EUROPEAN SPACE PROGRAMS CIRCULATION EXPERIMENT SPACE LABORATORIES . . FRENCH SPACE PROGRAMS EARTH RADIATION BUDGET SPACE PLATFORMS . . GEOGRAPHIC APPLICATIONS EXPERIMENT SPACE STATION PAYLOADS PROGRAM . EARTH VIEWING APPLICATIONS SPACE STATION POWER SUPPLIES . . INDIAN SPACE PROGRAM LABORATORY SPACE STATION PROPULSION . INDONESIAN SPACE PROGRAM . . ELECTROMAGNETIC ENVIRONMENT SPACE STATION STRUCTURES . . ITALIAN SPACE PROGRAM EXPERIMENT SPACECRAFT DOCKING . . JAPANESE SPACE PROGRAM . . GET AWAY SPECIALS (STS) SPIN STABILIZATION . . NASA SPACE PROGRAMS . HALOGEN OCCULTATION . . . APOLLO APPLICATIONS PROGRAM EXPERIMENT . . . APOLLO PROJECT . . OSS-1 PAYLOAD SPACEi TELESCOPE . . . BIOASTRONAUTICAL ORBITAL . . OSTA-1 PAYLOAD USE HUBBLE SPACE TELESCOPE SPACE SYSTEM . . OSTA-3 PAYLOAD . . . CENTAUR PROJECT PHYSICS AND CHEMISTRY SPACEi TEMPERATURE . . . EARTH 8 OCEAN PHYSICS EXPERIMENT IN SPACE GS TEMPERATURE APPLICATIONS PROGRAM . . PLASMA INTERACTION EXPERIMENT . SPACE TEMPERANRE . . . EARTH RESOURCES PROGRAM . . SPACELAB CRYOGENIC TEMPERATURE SPACE-TIME CONTINUUM

SPACE TE-TURE-(WN%) SPACECM LAN~ING-(WN%) SPACECRAR TRAJECTORIES-(CON%) ELECTFiON ENERGY SOFT LANDING RT ASCENT TRAJECTORIES ION TEMPERATURE . SOFT LANDING SPACECRAFT DESCENT TRAJECTORIES TERMINAL AREA ENERGY MANAGEMEN EARTH ORBITAL RENDEZVOUS SPACE-TIME CONTINUUM TOUCHDOWN FLIGHT MECHANICS USE RELATIVITY VERTICAL LANDING GODDARD TRAJECTORY WATER LANDING DETERMINATION SYSTEM HYPERBOLIC TRAJECTORIES SPACEBORNE ASTRONOYY INTERORBITAL TRAJECTORIES GS ASTRONOMY SPACECRIFT MANEUVERS UF SATELlJlE MANEUVERS LUNAR ORBITAL RENDEZVOUS . SPACEWRNB MRONOUY ~MonoN RT ASTRO MISSIONS (STS) 0s MANNVERS . SPACECRNT MANEuvEf?s ORBITAL RENDEZVOUS ASTRONOMICAL SATELLITES RADIO OCCULTATION COSMIC BACKGROUND EXPLORER . . ORBITAL MANEUVERS RT SIMULATION REENTRY TRAJECTORIES SATEm CONTROL MANEUVERABILITY RENDEZVOUS TRAJECTORIES FAINT OBJECT CAMERA ROUND TRIP TRAJECTORIES GAMMA RAY OBSERVATORY MANEUVERABLE SPACECRAFl SPACE FLIGHT SWINGBY TECHNIQUE HIPPARCOS SATEWTE HUBBLE SPACE TELESCOPE INFRARED SPACE OBSERVATORY (IS) SPACECRAFT ORBITAL ASSEMBLY SPACELAB IUE USE ORBITAL ASSEMBLY GS LABORATORIES MAGELLAN ULTRAVIOLET ASTRONOMY . SPACE LABORATORIES SATELLITE SPACECRAFT ORBITS . . MANNED ORBITAL LABORATORIES PINHOLE OCCULTER FACILITY GS ORBITS . . . SPACELAB QUASAT . SPACECRAFT ORBITS MANNED SPACECRAFT ROSAT MISSION . . SATELLITE ORBITS . MANNED ORBITAL LABORATORIES G2 . . . GEOSYNCHRONOUS ORBITS . . SPACELAB SAS3 . . . PARKING ORBITS PAYLOADS SPACE INFRARED TELESCOPE FACILITY . . . POLAR ORBITS . SPACE SHUTTLE PAYLOADS SFARSAT TELESCOPE . . . STATIONARY ORBITS . . SPACELAB TELESCOPES . . . TWENTY-FOUR HOUR ORBITS RT ADVANCED TECHNOLOGY LABORATORY ULTRAVIOLET TELESCOPES . . TRANSFER ORBITS ANNULAR SUSPENSM)N AND POINTING X RAY ASTROPHYSICS FACILITY . . . INTERPLANETARY TRANSFER SYSTEM ORBITS EXPOS (SPACELAB PAYLOAD) GEOPHYSICAL FLUID FLOW CELLS SPACEBORNE PHOTWAPHY . . TFWAN ORBITS RT CIRCULAR ORBITS GERMAN INFRARED LABORATORY UF SPACE PHOTOGRAPHY GET AWAY SPECIALS (STS) GS IMAGERY EARTH ORBITS . SPACEBORNE pnOT-Y ELLIPTICAL ORBITS SATELLITE-BORNE PHOTOGRAPHY EQUATORIAL ORBITS . . LUNAR ORBITS PHOTOGRAPHY OSTA-2 PAYLOAD . SPACEBORNE PmlTMlRAPHY ORBITAL MECHANICS ORBITAL POSITION ESTIMATION SEPAC (PAYLOAD) . . SATELLITE-BORNE PHOTOGRAPHY SKYLAB PROGRAM RT AERIAL PHOTOGRAPHY PLANETARY ORBITS SPACE SHUTTLES ASTRONOMICAL PHOTOGRAPHY SOLAR ORBITS - SPACE TRANSPORTATION SYSTEM BLACK AND WHITE PHOTOGRAPHY SPACEBORNE EXPERIMENTS CLOUD PHOTOGRAPHS SPACECRAFT RENDEZVOUS STARLAB ' CLOUD PHOTOGRAPHY USE SPACE RENDEZVOUS DIFFRACTIONLIMITED CAMERAS EARTH RESOURCES SPACECRAR STERlUZATlON SPACELAB PAYLOADS LUNAR PHOTOGRAPHS GS CLEANING GS PAYLOADS LUNAR PHOTOGRAPHY . STERILIZATION . SPACELAB PAYLOADS MARS PHOTCGRAPHS . . SPACECRAFT STERlUZITlON . . AMPS (SATELLITE PAYLOAD) MULTISPECTRAL BAND SCANNERS DECONTAMINATION . . ATMOSPHERIC CLOUD PHYSICS LAB PHOTOMAPPING . SPACECRAFT STERILIZATION (SPACELAB) P#O?OMAPS RT CHEMICAL STERILIZATION . . ATMOSPHERIC GENERAL ROCKET-BORNE PHOTOGRAPHY ETHYLENE OXIDE CIRCULATION EXPERIMENT SATELLITE OBSERVATION EXOBIOLOGY . . GEOPHYSICAL FLUID FLOW CELLS PLANETARY QUARANTINE . . SOLAR CELL CALIBRATION FACILITY RT ANNULAR SUSPENSION AND POINTING SPACEBORNE TELESCOPES PURIFICATION GS TELESCOPES STERILIZATION EFFECTS SYSTEM . SPACEBORNE TELESCOPES ASTRO MISSIONS (STS) ..GERMAN INFRARED LABORATORY SPACECRAFT TELEVISION GET AWAY SPECIALS (STS) GS COMMUNICATION EQUIPMENT SORTIE SYSTEMS . SPACECRAFT TELEVISION SPACE STATION PAYLOADS . . DIGITAL SPACECRAFT TELEVISION . . RANGER BLOCK 3 TELEVISION SPACELAB UV-OPTICAL TELESCOPE FACILITY SYSTEM USE STARLAB . . SPACE INFRARED TELESCOPE . . SATELLITE TELEVISION FACILITY TELECOMMUNICATION SPADATS (TRACKING SYSTEM) . . STARLAB . SPACECRAFT TELEVISION USE SPACE DETECTION AND TRACKING . . STARSAT TELESCOPE . . DIGITAL SPACECRAFT TELEVISION SYSTEM . . X RAY ASTROPHYSICS FACILITY . . RANGER BLOCK 3 TELEVISION RT ASTRO MISSIONS (STS) SYSTEM SPARTAN SATELLITES ASTRONOMICAL OBSERVATORIES . . SATELLITE TELEVISION GS OBSERVATORIES ASTRONOMICAL PHOTOGRAPHY TELEVISION SYSTEMS ASTRONOMICAL OBSERVATORIES ASTRONOMY . SPACECRAFT TELEVISION . . ASTRONOMICAL SATELLITES DIFFRACTION LIMITED CAMERAS . . DIGITAL SPACECRAFT TELEVISION . . . SPARTAN SATELLITES FAINT OBJECT CAMERA . . RANGER BLOCK 3 TELEVISION RT ASTROPHYSICS GAMMA RAY OBSERVATORY SYSTEM SOLAR PHYSICS MULTI-ANODE MICROCHANNEL ARRAYS . . SATELLITE TELEVISION ULTRAVIOLET ASTRONOMY OPTICAL TRANSFER FUNCTION RT COLOR TELEVISION ROSAT MISSION SATELLITE TRANSMISSION SPATIAL ORIENTATION STEREOTELEVISION ME ATTITUDE (INCLINATION) SPACECRAFT LANDING TELEVISION TRANSMISSION GS LANDING SPECTRA . SPACECRAFT LANDING SPACECRAFT TRAJECTORIES UF OPTICAL SPECTRUM . . HORIZONTAL SPACECRAFT LANDING GS TRAJECTORIES GS SPECYRA . . LUNAR LANDING SPACECRAFT TRAJECTORIES ATOMIC SPECTRA . . MARS LANDING . . EARTH-VENUS TRAJECTORIES CONTINUOUS SPECTRA . PLANETARY LANDING . . INTERPLANETARY TRAJECTORIES ENERGY SPECTRA RT AIRCRAFT LANDING . . . EARTH-MARS TRAJECTORIES ELECTRONIC SPECTRA APPROACH AND LANDING TESTS (STS) . . . EARTH-MERCURY TRAJECTORIES NEUTRON SPECTRA CRASH LANDING . . LUNAR TRAJECTORIES MASS SPECTRA GLIDE LANDINGS . . . CIRCUMLUNAR TRAJECTORIES MOLECULAR SPECTRA HARD LANDING . . . EARTH-MOON TRAJECTORIES ELECTRONIC SPECTRA LANDING SIMULATION . . . MOON-EARTH TRAJECTORIES RAMAN SPECTRA SPECTROSCOPIC TELESCOPES

~PECTRALEMIWON-(CDNX) SPECTROM~RS-(CON~) SPECTRA-(CONX) CHEMICAL ANALYSIS VIBRATIONAL SPECTRA RT COMlNUOUS SPECTRA . . DIFFRACTOMETERS NOISE SPECTRA ELECTROMAGNETIC RADIATION . ELECTRON PROBES OXYGEN SPECTRA EMrIANCE . GONIOMETERS PLASMA SPECTRA INCANDESCENCE . INFRARED SPECTROSCOPY . POWER SPECTRA LIGHT EMISSION MICHELSON INTERFEROMETERS . . CEPSTRA LlNE SPECTRA . RADIATION SPECTRA NONGRAY GAS OPTICAL EQUIPMENT ABSORPTION SPECTRA a RADIATION OPTICAL MEASUREMENT . . PHOTOOONIOMETERS FRAUNHOeR LlNES SPECTROGRAMS . . . MEASUREMENT HERZBERG BANDS SPECTROSCOW PI~~T~GRAPHIC . . . PHOTOMETERS TELLURIC UNES SPECTRUM ANALYSIS . . . RADIATION COUNTERS ELECTROMAGNETIC SPECTRA SPONTANEOUS EMISSION . . SOUR INSTRUMENTS . . . GAMMA RAY SPECTRA WAVELENGTHS INFRARED SPECTRA SPECTRA . . . SPECTRAL REFLECTANCE . LlNE SPECTRA . . SPECTRAL ENERGY DISTRIBUTION SPECTROGRAPHS . . . . BALMER SERIES GS DlSTRlBUTlON (PROPERM . D LINES ENERGY SPECTRORADIOMETERS . . . . DIS~RIBUTION. SPECTROSCOPIC ANALYSIS . . . . ELECTRONIC SPECTRA . . SPECTRAL ENERGY DISTRIBUTION . . . . FRAUNHOFER LlNES SPECTROSCOPY RT rn DISTRIBUTION SPECTRUM ANALYSIS . . . . H LlNES ELECTROMAGNETIC RADIATION . . . . . H ALPHA LlNE ENERGY SPECTRA . . . . H BETA LINE FINE STRUCTURE SPECTROMETRY . . . . . H GAMMA LlNE LlNE SPECTRA USE SPECTROMETERS . . . . K LINES . . . . LYMAN SPECTRA SPECTRAL UNES SPECTROPHOTOMVERS . . . . PASCHEN SERIES USE UNE SPECTRA GS MEASURING INSTRUMENTS . . . . RYDBERG SERIES , OPTICAL MEASURING INSTRUMENTS . . . .. TELLURIC LlNES SPECTROQRAMS . . SPECTROPHOTDMETERS . . . RADIO SPECTRA RT LINE SPECTRA . . . INFRARED SPECTROPHOTOMETERS . . . . MICROWAVE SPECTRA SPECTRA . . . ULTRAVIOLET . . . RAMAN SPECTRA SPECTRAL EMISSION SPECTROPHOTOMETERS . . . SIEUAR SPECTRA SPECTROGRAPHS . RADIATION MEASURING INSTRUMENTS . . . . SOLAR SPECTRA SPECTROPHOTOGRAPHY . . ACTINOMETERS . . . UBV SPECTRA SPECTROSCOPY . . . SPECTROPHOTOMVERS . . . ULTRAVIOLET SPECTRA SCTRUM ANALYSIS . . . . INFRARED . . . VIBRATIONAL SPECTRA SPECTROPHOTOMETERS . . . VISIBLE SPECTRUM . . . . ULTRAVIOLET X RAY SPECTRA SPECTROaRAPHs . . . GS SPECTROGRAPHS SPECTROPHOTOMETERS . . EMISSION SPECTRA . HlGH DISPERSION SPECTROGRAPHS OPTICAL EQUIPMENT . SHOCK SPECTRA , OPTICAL MEASURING INSTRUMENTS . SPECTRAL BANDS RT SPECTRA SPECTROGRAMS . . SPECTROPHOTOMETERS . . ABSORPTION SPECTRA SPECTROMETERS . . . INFRARED SPECTROPHOTOMETERS FRAUNHOFER LlNES . . . SPECTROSCOPIC ANALYSIS . . . ULTRAVIOLET ... HERZBERG BANDS SPECTROSCOPY SPECTROPHOTOMETERS . . . TELLURIC LlNES RT CHEMICAL ANALYSIS . . PHOTOLUMINESCENT BANDS DUOCHROMATORS SPECTROHELIOGRAPHS . . SCHUMANN-RUNGE BANDS MONOCHROMATORS UF HEUOGRAPHS . . SWAN BANDS OPTICAL MEASUREMENT HELIOGRAPHY . . VEGARD-KAPLAN BANDS PHOTOMETERS SPECTROHELIOSCOPES RT ASTRONOMICAL SPECTROSCOPY RADIOMETERS GS IMAGERY COLOR - - SPECTRORADIOMETERS EXCITONS . SPECTROHEUO~RAPHS SPECTROSCOPIC ANALYSIS FLUX DENSITY MEASURING INSTRUMENTS GAMMA RAY SPECTROMETERS . RADIATION MEASURING INSTRUMENT ISOELECTRONIC SEQUENCE . . ACTlNOMmRS SPECTRAL SENSITIVITY . . . SPECTROHEUOGRAPHS SPECTROPHOTOMETRY GS OPTICAL MEASUREMENT SPECTRAL SHIFT CONTROL . SPECTROMETERS PHOTOMETRY SPECTRAL THEORY . . SPECTROHEUOGRAPHS . SPECTROPHOTOMETRY SPECTROGRAMS OPTICAL EQUIPMENT . . STELLAR SPECTROPHOTOMETRY SPECTROGRAPHS .- SPEC~R~HEU~~RAPHS . . . SPECTROSCOPY SPECTROMETERS SOLAR INSTRUMENTS SPECTROPHOTOMETRY SPECTROSCOPY . SPECTROHEU~RAPHS . SPECTRUM ANALYSIS RT BLACK AND WHITE PHOTOGRAPHY . . STELLAR SPECTROPHOTOMETRY RT ASTRONOMICAL PHOTOMETRY TRANSITION PROBABILITIES CORONAGRAPHS SOLAR SPECTROMETERS COLORIMETRY STARSAT TELESCOPE IMAGING SPECTROMETERS SPECTRAL ABSORPTION SPECTROSCOPIC ANALYSIS USE ABSORPTION SPECTRA SPECTROHEUOSCOPES USE SPECTROHELIOGRAPHS SPECTROPOLARIMETERS SPECTRAL ANALYSIS USE POLARIMETERS USE SPECTRUM ANALYSIS SPECTROMVERS UF SPECTROMETRY SPECTRORADIOMETERS SPECTRAL BANOS SPECTROSCOPES GS MEASURING INSTRUMENTS GS SPECTRA GS MEASURING INSTRUMENTS . RADIATION MEASURING INSTRUMENTS . SPECTRAL BANOS . SPECTROMETERS . . ACTINOMETERS . . ABSORPTION SPECTRA . . EBERT SPECTROMETERS . . RADIOMETERS . . . FRAUNHOFER LlNES . . FABRY-PEROT SPECTROMETERS . . . . SPECTRORADIOMETERS . . . HERZBERG BANDS . . GAMMA RAY SPECTROMETERS RT SPECTROMETERS . . . TELLURIC LlNES IMAGING SPECTROMETERS SPECTROPHOTOMETERS . . PHOTOLUMINESCENT BANDS INFRARED SPECTROMETERS . . SCHUMANN-RUNGE BANDS . . . FILTER WHEEL INFRARED . . SWAN BANDS SPECTROSCOPES SPECTROMETERS USE SPECTROMETERS . . VEGARD-KAPLAN BANDS ' . LASER SPECTROMETERS RT BAND RATlOlNG . . MASS SPECTROMETERS 7. BANDS . . MICROWAVE SPECTROMETERS SPECTROSCOPIC TELESCOPES ELECTRONIC SPECTRA . . NEUTRON SPECTROMETERS UF DIFFRACTION TELESCOPES ENERGY BANDS SOLAR BACKSCATTER UV GS TELESCOPES FREQUENCIES SPECTROMETER SPECTROSCOPIC TELESCOPES LlNE SPECTRA SOLAR SPECTROMETERS MULTISPECTRAL TRACKING VISIBLE SPECTRUM . . SPECTROHELIOGRAPHS TELESCOPES WHITE NOISE . . TIME OF FLIGHT SPECTROMETERS STRATOSCOPE TELESCOPES ULTRAVIOLET SPECTROMETERS RT ASTRONOMICAL SPECTROSCOPY SPECTRAL EMISSION . . . HlGH DISPERSION REFLECTING TELESCOPES GS EMISSION SPECTROGRAPHS REFRACTING TELESCOPES . SPECTRAL EMISSION RT ACTINOMETERS STELLAR SPECTROPHOTOMETRY SPECTROSCOPY

SPECTROSCOPY SPHERICAL COORQ~NATES-(WNE) STAR CLUSTERS-(CON77 GS SPEcVWSCOPY CELESTIAL REFERENCE SYSTEMS STELLAR SYSTEMS . ABSORPTION SPECTROSCOPY GEOCENTRIC COORDINATES VIRGO GALACTIC CLUSTER . . OPTOGALVANIC SPECTROSCOPY PLANETOCENTRIC COORDINATES . ASTRONOMICAL SPECTROSCOPY muvl COORDINATES STAR DISTRlBUTION . AUGER SPECTROSCOPY POSITION (LOCATION) UF STAR FIELDS . AURORAL SPECTROSCOPY wREFERENCE SYSTEMS STELLAR FIELDS . ELECTRON SPECTROSCOPY GS MSTRlBUTlON (PROPERTY) . FLAME SPECTROSCOPY sPwUI1CAL HARWNICS . SPATIAL DISTRIBUTION . GAS SPECTROSCOPY 0s ANALYSiS (MATHEMATICS) . . STAR DISTRIBUTION . HoiooRAffll~SPECTRoscoW . COMPW VARIABLES . VERTICAL MSTRIBUTION . INFRARED SPECTROSCOPY . . SPHERICAL HARMONICS . . STAR DlSTFiIBUTION . MAGPIETIC SPECTROSCOW FUNCTIONS (MATHEMATICS) RT ANGULAR DISTRIBUTION . MASS SPECTROSCOPY . SPHERICAL HARMONICS ASTROLABES . MOLECULAR SPECTROSCOPY HARMONICS BARRED GALAXIES . . RAMAN -PY . smlERICAL HARWNICS COSMOLOGY . NUCLEAR RADIATION SPECTROSCOPY RT LEGENffid FUNCTIONS GALACTIC CLUSTERS . OPTICAL EMlSSlON SPECTROSCOPY GAIACTIC EVOLUTION . . LASER SPECTROSCOPY SPICULES GLOBULAR CLUSTERS . PHOTOACOUSTIC SPECTROSCOPY GS STELLAR ACTIVITY MASS DISTRIBUTION . PHOTOELECTRON SPECTROSCOPY . SOLAR ACTIVITY RADIAL DISTRIBUTION RADIO SPECTROSCOPY . . SPICULES STAR FORMATION SPECTROPHOTOGRAPHY RT CHROMOSPHERE STELLAR SYSTEMS . SPECTROPHOTOMETRY PHOTOSPHERE VIR~GALACTIC CLUSTER . . STELLAR SPECTROPHOTOMETRY SOLAR ATMOSPHERE . SPECTROSCOPIC ANALYSIS STAR FIELDS ULTRASONIC SPECTROSCOPY SPIN TEMPERATWIE USE STAR DISTRIBUTION . ULTRAVOCET SPECTROSCOPY SN (LIMITED TO ASTROPHYSICS) . VACUUM SPECTROSCOPY GS TEMPERATURE STAR FORMATION . X RAY SPECTROSCOPY . SPIN TEMPERATURE GS EVOLUTION (DEVELOPMENT) RT CHEMICAL ANALYSIS RT ABSORPTION SPECTRA . STELLAR EVOLUTION CINESPECTROGRAPHS ASTROPHYSICS . . STAR FORMATION COLORIMETRY HYDROOEN CLOUDS RT ASTROPHYSICS ELECTROPHOTOMETRY INTERSTELLAR GAS COOLING FLOWS (ASTROPHYSICS) FRAUNHOFER LINE DISCRIMINATORS COsMOmy ISOELECTRONIC SEQUENCE EARLY STARS LALLEMAND CAMERAS SPIRAL QALAXIES HYDROGEN CLOUDS w OPTICS GS CELESTIAL BODIES INTERSTELLAR GAS PHOTOMETRY INTERSTELLAR MATTER PRESSURE BROADENING . GALAXIES SPIRAL QALAXIES MOLECULAR CLOUDS SPECTRA . . BARRED GALAXIES NEBULAE SPECTRAL EMISSION . . . MILKY WAY GALAXY NUCLEAR FUSION SPECTRAL REFLECTANCE . . . RT ANDROMEDA GALAXY PRE-MAIN SEQUENCE STARS SPECTROGRAMS COROTATION PROTOSTARS SPECTROGRAPHS DENSITY WAVE MODEL STAR DISTRIBUTION SPECTROMETERS STAR FORMATION RATE SPECTROPHOTOMETERS DISK GALAXIES ELUPTICAL GALAXIES STARBURST GALAXIES SPECTRUM ANALYSIS STARS TIME OF FLIGHT SPECTROMETERS LOCAL GROUP (ASTRONOMY) MAFFEl GALAXIES STELLAR MASS ACCRETION vlslki SPECTRUM T TAURI STARS ZEEMAN EFFECT SNFERT GALAXIES VIRGO GALACTIC CLUSTER STAR FORMATION RATE SPECTRUM ANALYSIS SPORADIC E LAYER RT GALACTIC EVOLUTION UF SPECTRAL ANALYSIS GS EARTH ATMOSPHERE GALAXIES GS SPECTRUM ANALYSIS . UPPER ATMOSPHERE STAR FORMATION . CEPSTRAL ANALYSIS . . EARTH IONOSPHERE STARBURST GALAXIES . FLAME SPECTROSCOPY . . . E REGION STELLAR EVOLUTION . MAXIMUM ENTROPY MEMOD . . . . SPORADIC E MYER RT ABSORPTION SPECTRA REGIONS STARBURST GALAXIES coANALYZING . E REGION GS CELESTIAL BODIES EMISSION SPECTRA . . SPORADIC E LAYER . GALAXIES FREQUENCY ANALYZERS RT E-1 LAYER . . STARBURST GALAXIES FREWENCY SCANNING E-2 LAYER RT GALACTIC NUCLEI GAMMA RAY SPECTROMETERS MIDLATITUDE ATMOSPHERE STAR FORMATION HOLOGRAPHIC SPECTROSCOPY STAR FORMATION RATE HYPERFINE STRUCTURE SPORADIC METEOROIDS KRAMERS-KRONIG FORMULA SN (METEOROIDS NOT ASSOCIATED WITH A STARLAB LASER SPECTROSCOPY METEOROID SHOWER OR STREAM) UF SPACELAB UV-OPTICAL TELESCOPE LINE SPECTRA GS CELESTIAL BODIES FACILITY MAGNETIC RESONANCE . METEOROIDS GS TELESCOPES OPTICAL RESONANCE . SPORADIC METEOROIDS SPACEBORNE TELESCOPES SIGNAL ANALYSIS . RT METEOR TRAILS . STARLAB SPECTRA METEOROID CONCENTRATION ULTRAVIOLET TELESCOPES SPECTRAL EMISSION . STARLAB SPECTRAL METHODS RT zOPTlCS SPECTRAL REFLECTANCE STAR CLUSTERS GS CELESTIAL BODIES SPACE SHUTTLE PAYLOADS SPECTRAL RESOLUTION SPACELAB SPECTRAL SIGNATURES . STAR CLUSTERS SPECTROGRAMS . . GLOBULAR CLUSTERS SPECTROMETERS . . . HORIZONTAL BRANCH STARS STARPROBE MISSION SPECTROSCOPY . . OPEN CLUSTERS GS PROGRAMS STARK EFFECT . . . PLEIADES CLUSTER . NASA PROGRAMS TOROIDAL DISCHARGE . . . PRAESEPE STAR CLUSTE~S . . NASA SPACE PROGRAMS ULTRASONIC SPECTROSCOPY RT BARRED GALAXIES . . STA~PROBEMISSION ULTRAVIOLET SPECTROSCOPY BINARY STARS SPACE PROGRAMS ZEEMAN EFFECT -CLUSTERS . . NASA SPACE PROGRAMS COLOR-MAGNITUDE DIAGRAM . . . STARPROBE MISSION DlSK GALAXIES SPACE MISSIONS SPEED ELLIPTICAL GALAXIES STARPROBE MlSSlON USE VELOCITY GALACTIC CLUSTERS RT STARPROBE SPACECRAFT GALAXIES SPHERICAL COORDINATES IRREGULAR GALAXIES STARPROBE SPACECRAFT UF CURVILINEAR COORDINATES MAGELLANIC CLOUDS GS UNMANNED SPACECRAFT GS COORDINATES METALLlClTY SPACE PROBES . SPHERICAL COORDINATES SOLAR NEIGHBORHOOD SOLAR PROBES RT ASTRONOMICAL COORDINATES STARS STARPROBE SPACECRAFT

SUDDEN IONOSPHERIC DISTURBANCES

STELLAR SF+ECTRA-(WNX) STONY Mmoums STRATOSCOPE TELESCOPES-(CONE) HERBIG-HARO OBJECTS GS CELESTIAL BODIES REFLECTING TELESCOPES HERTZSPRUNG-RUSSELL DIAGRAM . METEORITES REFRACTING TELESCOPES HORIZONTAL BRANCH STARS . . STONY METEORmS INFRARED SPECTRA . . . ACHONDRITES STRATOSCOPE 1 TELESCOPE K STARS . . . . BONWC METEORITE USE STRATOSCOPE TELESCOPES LINE SPECTRA . . . . KAPOETA ACHONDRITE . NORTON COUNTY ACHONDRITE MOLECULAR SPECTRA . . . STRAloscoPE 2 TUESCOPE CHONDRITES PECULIAR STARS . . . USE STRATOSCOPE TELESCOPES SEYFERT GALAXIES . . . . ERUDERHEIM METEORITE STELLAR COLOR .... CARBONACEOUS CHONWIITES mMBKlTIC STARS . . . . . AUENW mmm STRATOSPHERE ULTRAVIOLET SPECTRA . . . . . MURCHISON METEORITE SN (ALTITUDE RANGE BETWEEN VISIBLE SPECTRUM . . . . CARBONACEOUS METEORITES APPROXIMATELY 15 AND 50 KM) X RAY SPECTRA . . . . . ALAlS METEORITE Gs EARTH ATMOSPHERE . . . . . COLD BOKKRIELD METEORITE . MIDDLE ATMOSPHERE . . . . . WUNA METEORITE . . STRATOSPHERE STELLAR SPECTROPHOTOMETRY . . . OZONOSPHERE GS OPTICAL MEASUREMENT . . . . . MURRAY METEORITE . . . . . ORGUEIL METEORITE . . . STRATOPAUSE . PHOTOMrnY RT CHEMOSPHERE . . ASTRONOMICAL PHOTOMETRY ...... TONK METEORITE . . . . HVllTlS CHONDRITE HOMOSPHERE , . STELLAR SPECTROPHOrOMETRY PANTAR CHONDRITES ISOTHERMAL LAYERS SPECTROPHOTOMETRY . . . . . STELLAR SPECTROPKlTOMETRY . . . . PRIBRAM METEORITE TEKTITES SPECTROSCOPY . . . STRATOSPHERE RADIATION AUSTRALITES . SPECTROPHOTOMETRY . . . . GS ATMOSPHERIC RADIATION STEW SPECTROPHOTOMETRY . . . . BEDIASITES . STRATOSPHERE RADIATION . . NNGUSK MElEORlTE RT COLOR-COLOR MAGRAM . . . RT CORPUSCULAR RADIATION HORIZONTAL BRANCH STARS RT COESlTE ELECTROMAGNETIC RADIATION INFRARED PHOTOMETRY HARLETON METEORITE m RADtATION PECULIAR STARS IRON METEORITES SKY RADIATION SPECTROSCOPIC TELESCOPES WAREV METEORITE TROPOSPHERIC RADIATION METEORITIC COMPOSITION STELLAR COLOR METEORITIC MICROSTRUCTURES STRONQ INTERACTIONS (FIELD THEORY) OKHANSK METEORITE GS FIELD THEORY (PHYSICS) STELLAR STRUCTURE SCHREIBERSITE RT CHROMOSPHERE . S17K)Na INTERACTIONS (FIELD CORONAL HOLES THEORY) DENSE PLASMAS STORMS PARTICLE INTERACTIONS METALLIC STARS GS STORMS ELEMENTARY PARTICLE PECULIAR STARS . IONOSPHERIC STORMS IMERACTIONS SOLAR ATMOSPHERE . . SUDDEN IONOSPHERIC . . HIGH ENERGY INTERACTIONS SOLAR CORONA DISTURBANCES . . . STRONG INTERACTIONS (FIELD SOLAR INTERIOR . MAGNETIC STORMS THEORY) STELLAR COMPOSITION . NOISE STORMS RT GRAND UNIFIED THEORY STELLAR CORES . SOLAR STORMS s INTERACTIONS STELLAR INTERIORS . STORMS (METEOROLOGY) NUCLEAR INTERACTIONS STELLAR PHYSICS . . CYCLONES NUCLUIR REACTIONS STRUCTURES . . . HURRICANES =THEORIES SUPERMASSIVE STARS . . . . ANNA HURRICANE WEAK INTERACTIONS (FIELD THEORY) . . . TYPHOONS DUST STORMS STELLAR SYSTEMS . . SUBDWARF STARS . . HAILSTORMS GS CELESTIAL BODIES SN (EXCLUDES PLANETARY SYSTEMS) MICROBURSTS (METEOROLOGY) GS CELESTIAL BODIES . . . STARS . . POLAR SUBSTORMS . . SUBOWARF STARS . STELLAR SYSTEMS RAINSTORMS RT BINARY STARS . . AT DWARF STARS . THUNDERSTORMS GALACTIC CLUSTERS . . MAIN SEQUENCE STARS . SNOWSTORMS GALACTIC ROTATION . RED DWARF STARS TORNADOES GALACTIC STRUCTURE . . WHITE DWARF STARS TROPICAL STORMS GALAXIES . . HURRICANES GRAVITATIONAL COLLAPSE . . . ANNA HURRICANE SUBGIANT STARS GRAVITATIONAL EFFECTS ...... TYPHOONS GS CELESTIAL BODIES NEMESIS (STAR) . STARS SIGMA ORIONIS RT CLIMATOLOGY COLD FRONTS . . SUBGIANT STARS STAR CLUSTERS RT CARBON STARS STAR DISTRIBUTION m DISTURBANCES FLOOD---- DAMAGE DWARF STARS STELLAR GRAVITATION FLOODS GIANT STARS STELLAR MOTIONS FRONTS (METEOROLOGY) LATE STARS GUSTS M STARS STELLAR TEMPERATURE PRECIPITATION (METEOROLOGY) MAIN SEQUENCE STARS GS TEMPERATURE SNOW COVER STELLAR EVOLUTION . STELLAR TEMPERATURE SOLAR TERRESTRIAL INTERACTIONS SUPERGIANT STARS RT COOL STARS STORM DAMAGE STELLAR MASS STORM ENHANCEMENT SUBMILLIMETER WAVES SYMBIOTIC STARS STORM SUPPRESSION SN (BELOW 1 MILLIMETER) SUDDEN STORM COMMENCEMENTS GS ELECTROMAGNETIC RADIATION STELLAR WINDS WARM FRONTS RADIO WAVES GS EXTRATERRESTRIAL RADIATION WEATHER FORECASTING SHORT WAVE RADIATION . STELLAR RADIATION WlND (METEOROLOGY) SUBMILLIMETER WAVES . . STELLAR WINDS RT BEAMS (RADIATION) PARTICLES STRATOPAUSE ELECTROMAGNETIC NOISE . CHARGED PARTICLES SN (ALTITUDE APPROXIMATELY 50 KM) FAR INFRARED RADIATION . . ENERGETIC PARTICLES GS EARTH ATMOSPHERE FREQUENCIES . . . PLASMAS (PHYSICS) . MIDDLE ATMOSPHERE MICROWAVES . . . . SPACE PLASMAS . . STRATOSPHERE MILLIMETER WAVES . . . . . STELLAR WINDS . . . STRATOPAUSE WAVELENGTHS RT CHROMOSPHERE RT MESOPAUSE COSMIC PLASMA MESOSPHERE SUDDEN IONOSPHERIC DISTURBANCES INTERGALACTIC MEDIA UF GEOMAGNETIC CROTCHETS INTERSTELLAR GAS STRATOSCOPE TELESCOPES SID (IONOSPHERIC DISTURBANCES) RADIATION PRESSURE UF STRATOSCOPE 1 TELESCOPE GS IONOSPHERE DISTURBANCES SOLAR WlND STRATOSCOPE 2 TELESCOPE lONOSPHERlC STORMS SOLAR WlND VELOCITY GS TELESCOPES SUDDEN IONOSPHERIC . SPECTROSCOPIC TELESCOPES DISTURBANCES STONES (ROCKS) . . STRATOSCOPE TELESCOPES STORMS USE ROCKS RT BALLOONS IONOSPHERIC STORMS SUN

SUDDEN I-RE-(CONE) SUN-(CONE) SUP~GRAV~~-(CONT:) . . SUDDEN IONOSPHERIC SOLAR SIMULATION GRAVITINOS OWNRBANCES SOLAR SIMULATORS GRAVITONS RT mDlSNRBANCES SOLAR SPECTRA GROUP THEORY MAGNETIC DISTURBANCES SOLAR SPECTROMmRS UE GROUPS MAGNETIC STORMS SOLAR STORMS PARTICLE THEORY SOLAR ACTIVITY EFFECTS SOUR SYSTEM QUANTUM THEORY TRAVEUNO K)NOSPHERIC SOLAR TEMPERATURE RELATIVITY DISTURBANCES SOLAR TERRESTRIAL INTERACTIONS SUPERSYMMETRY SOLAR THERMAL PROPULSION THEORETICAL PHYSICS SOLAR TOTAL ENERGY SYSTEMS UNIFIED FIELD THEORY SUN YAW-MILLS THEORY UF SOLAR DISK SOLAR VELOCITY GS CELESTIAL BODIES SOLAR WND . STARS SOLAR WIND VELOCITY SUPERWAWW STARS . . G STARS SOLAR X-RAYS GS CELESTIAL BODIES ... SUN SUNLIGHT . STARS . . MAIN SEQUENCE STARS ULYSSES MISSION . . SUPERMASSWE STARS . . . SUN Fi' DEGENERATE MATTER RT AOSO SUN SENSORS STELLAR MODELS ASTEC SOLAR TURBOELECTRIC USE SOLAR SENSORS STELLAR STRUCTURE GENERATOR CELESTIAL MECHANICS SUNUGHT SUPERNOVA REMNANTS GRIST (TELESCOPE) GS ELECTROMAGNETIC RADIATION RT BLACK HOLES (ASTRONOMY) LIGHT SOURCES . LIGHT (VISIBLE RADIATION) NEUTRON STARS OSO . . SUNUGHT NORTH POLAR SPUR (ASTRONOMY; PHOTOSPHERE DCTRATERRESTRIAL RADIATION PULSARS PUNETS . SOLAR.. - RADIATION RED DWARF STARS SATELLITE SOLAR ENERGY . . SUNUGHT SUPERNOVAE CONVERSION RT BLACK BODY RADIATION WHITE DWARF STARS SATELLITE SOLAR POWER STATIONS CIRCUMSOLAR RADIATION WHITE HOLES (ASTRONOMY) SOLAR ACTIVITY CLIMATOLOGY SOLAR ACTIVITY EFFECTS CLOUD COVER SOLAR ARRAYS INFRARED RADlATlON SUPERNOVA 1987A SOLAR ATMOSPHERE INSOLATION GS CELESTIAL BODIES SOLAR ATRIUMS SKY . STARS SOLAR AUXILIARY POWER UNITS SKY BRIGHTNESS . . VARIABLE STARS SOLAR BLANKETS SKY RADIATION . . . SUPERNOVAE SOLAR CELLS SOLAR HEATING . . . . SUPERNOVA 1987A SOLAR COLLECTORS SUN RT MAGELLANIC CLOUDS SOLAR COMPASSES THERMAL RADIATION SO~RCONSTANT ULTRAVIOLET RADIATION SUPERNOVAE SOLAR COOLING UMKEHR EFFECT GS CELESTIAL BODIES SOLAR CORONA ZODIACAL LIGHT . STARS SOLAR CORPUSCULAR RADIATION . . VARIABLE STARS SOLAR COSMIC RAYS SUNRISE . . . SUPERNOVAE SOLAR CYCLES RT MORNING . . . . SUPERNOVA 1987A SOLAR ECLIPSES mSClENCE RT CRAB NEBULA SOLAR ELECTRIC PROPULSION SUNSET GRAVITATIONAL COLLAPSE SOLAR ELECTRONS TERMINATOR LINES NEBULAE SOLAR ENERGY NOVAE SOLAR ENERGY ABSORBERS SUNSET OPlK THEORY SOLAR ENERGY CONVERSION RT NEN!NG ORION NEBULA SOLAR FLARES ooSClENCE STELLAR MASS SOLAR FLUX SUNRISE STELLAR MASS EJECTION SOLAR FLUX DENSITY TERMINATOR LINES STELLAR PHYSICS SOLAR FURNACES SUPERNOVA REMNANTS GENERATORS SUNSPOT CYCLE SOLAR GRANULATION SOLAR GRAVITATION GS CYCLES SUPERSYMMRRY SOLAR CYCLES GS SYMMETRY SOLAR HEATING . SUNSPOT CYCLE SUPERSYMMETRY SOLAR HOUSES . . . RT SOLAR ACTIVITY RT BOSONS SOLAR INSTRUMENTS STARSPOTS BROKEN SYMMETRY SOLAR INTERIOR STELLAR ACTIVITY COSMOLOGY SOLAR UMB FERMIONS SOLAR LONGITUDE FIELD THEORY (PHYSICS) SOLAR MAGNETIC FIELD SUNSPOTS GAUGE THEORY SOLAR MAXIMUM MISSION GS STELLAR ACTIVITY GRAND UNIFIED THEORY SOLAR MAXIMUM MISSION-A . SOLAR ACTIVITY GRAVITATION THEORY SOLAR MESOSPHERE EXPLORER . . SUNSPOTS GROUP THEORY SOLAR NEIGHBORHOOD RT FACULAE LIE GROUPS SOLAR NEUTRINOS MAGNETIC DISTURBANCES PARTICLE THEORY SOLAR OBLATENESS PHOTOSPHERE QUANTUM THEORY SOLAR OBSERVATORIES SOLAR CYCLES STRING THEORY SOLAR ORBITS SOLAR FLARES SUPERGRAVITY SOLAR OSCILLATIONS SOLAR TERRESTRIAL INTERACTIONS THEORETICAL PHYSICS SOLAR PARALM TWENTYSEVEN DAY VARIATION SOLAR PHYSICS UNIFIED FIELD THEORY SOLAR PONDS (HEAT STORAGB SUPERGIANT STARS SOLAR POSITION GS CELESTIAL BODIES SURFACE TEMPERATURE SOLAR POWER SATELUTES . STARS GS SURFACE PROPERTIES SOLAR POWERED AIRCRAFT . . SUPERGIANT STARS SURFACE TEMPERATURE SOLAR PROBES . . . R CORONAE BOREALIS STARS SKlN TEMPERATURE SOLAR PROMINENCES RT GIANT STARS (NON-BIOLOGICAL) SOLAR. PROPULSION K STARS WALL TEMPERATURE SOLAR PROTONS M STARS TEMPERATURE SOLAR RADAR ECHOES MlRA VARIABLES . SURFACE TEMPERATURE SOLAR RADIATION SUBGIANT STARS . . SKlN TEMPERATURE SOLAR RADIATION SHIELDING (NON-BIOLOGICAL) SOLAR RADIATION 1 SATELLITE SUPERGRAVITY . . WALL TEMPERATURE SOLAR RADIATION 3 SATELLITE GS GRAVITATION THEORY RT COARSENESS SOLAR RADIO BURSTS SUPERGRAVITY GEOTHERMAL ANOMALIES SOLAR REFLECTORS RT BROKEN SYMMETRY OCEAN TEMPERATURE SOLAR ROTATION COSMOLOGY SEA SURFACE TEMPERATURE SOLAR SAILS FIELD THEORY (PHYSICS) .r SURFACES SOLAR SEA POWER PLANTS GAUGE INVARIANCE THERMOCLINES SOLAR SENSORS GAUGE THEORY WATER TEMPERATURE TELESCOPES

SURVEYOR LUNAR PROBES SURVEYOR 3 LUNAR PRoBE-(CoNr) synrelorlc s~ms-(CoNT) GS LUNAR SPACECRAFT RT ATLAS CENTAUR LAUNCH VEHICLE NOVAE . LUNAR PROBES STEUAR ENVELOPES STELLAR MASS ACCRETION . . SURVEYOR WNAR PROBES SURVEYOR 4 LUNAR PROBE STELLAR OSCILLATIONS . . . SURVEYOR 1 LUNAR PROBE GS LUNAR SPACECRAFT STELLAR SPECTRA . . . SURVEYOR 2 LUNAR PROBE LUNAR PROBES . STELLAR TEMPERATURE . . . SURVEYOR 3 LUNAR PROBE . . SURVEYOR LUNAR PROBES . . . SURVEYOR 4 LUNAR PROBE . . . SURVEYOR 4 LUNAR PROBE . . . SURVEYOR 5 LUNAR PROBE SOFT LANDING SPACECRAFT SYMMETRY BREAKING . . . SURVEYOR 6 LUNAR PROBE . SURVEYOR LUNAR PROBES USE BROKEN SYMMETRY . . . SURVEYOR 7 LUNAR PROBE . . SURVEYOR 4 LUNAR PROBE SOFT LANDING SPACECRAFT UNMANNED SPACECRAFT SYNCHRQTRON RADIATION . SURVEYOR LUNAR PROBES . SPACE PROBES GS ELECTROMAGNETIC RADIATION . . SURVEYOR 1 LUNAR PROBE . . LUNAR PROBES . NONTHERMAL RADIATION . . SURVEYOR 2 LUNAR PROBE . . . SURVEYOR LUNAR PROBES . . SYNCHROTRON RADIATION . . SURVEYOR 3 LUNAR PROBE . . . . SURVEYOR 4 LUNAR PROBE . POLARIZED ELECTROMAGNETIC . . SURVEYOR 4 LUNAR PROBE RT ATLAS CENTAUR LAUNCH VEHICLE RADIATION . . SURVEYOR 5 LUNAR PROBE SYNCHROTRON RADIATION . . SURVEYOR 6 LUNAR PROBE SURVEYOR 5 LUNAR PROBE POLARIZED RADIATION . . SURVEYOR 7 LUNAR PROBE GS LUNAR SPACECRAFT . POLARIZED ELECTROMAGNETIC UNMANNED SPACECRAFT . LUNAR PROBES RADIATION . SPACE PROBES . . SURVEYOR LUNAR PROBES . . SYNCHROTRON RADIATION . LUNAR PROBES . . . SURVEYOR 5 LUNAR PROBE RT BREMSSTRAHLUNG . . . SURVEYOR LUNAR PROBES SOFT LANDING SPACECRAFT EXTRATERRESTRIAL RADIATION . . . . SURVEYOR 1 LUNAR PROBE . SURVEYOR LUNAR PROBES s RADIATION . . . . SURVEYOR 2 LUNAR PROBE . . SURVEYOR 5 WNAR PROBE RADIATION PROTECTION . . . . SURVEYOR 3 LUNAR PROBE UNMANNED SPACECRAFT SYNCHROTRONS . . . . SURVEYOR 4 LUNAR PROBE . SPACE PROBES X RAYS . . . . SURVEYOR 5 LUNAR PROBE . . LUNAR PROBES . . . . SURVEYOR 6 LUNAR PROBE . . . SURVEYOR LUNAR PROBES . . . . SURVEYOR 7 LUNAR PROBE . . . . SURVEYOR 5 LUNAR PROBE RT ATUS CENTAUR LAUNCH VEHICLE SURVEYOR PROJECT GS PROGRAMS SURVEYOR (I WNAR PROBE . LUNAR PROGRAMS GS LUNAR SPACECRAFT T TAURI STARS . . SURVEYOR PROJECT . LUNAR PROBES GS CELESTIAL BODIES . NASA PROGRAMS . . SURVEYOR LUNAR PROBES . STARS . . NASA SPACE PROGRAMS . . . SURVEYOR 6 LUNAR PROBE . . PROTOSTARS ...SURVEYOR PROJECT SOFT LANDING SPACECRAFT . . . PRE-MAIN SEQUENCE STARS . PROJECTS , SURVEYOR LUNAR PROBES . . . . T TAURI STARS . . SURVEYOR PROJECT . . SURVEYOR 6 LUNAR PROBE . . VARIABLE STARS . SPACE PROGRAMS UNMANNED SPACECRAFT . . T TAURI STARS . . NASA SPACE PROGRAMS - . SPACE PROBES RT HERBIG-HARO OBJECTS . . . SURVEYOR PROJECT . . LUNAR PROBES STAR FORMATION RT ATLAS CENTAUR LAUNCH VEHICLE . . . SURVEYOR LUNAR PROBES TAURUS CONSTELLATION CENTAUR PROJECT . . . . SURVEYOR 6 LUNAR PROBE LUNAR LANDING AT ATLAS CENTAUR LAUNCH VEHICLE TAURID METEOROIDS LUNAR PROBES GS CELESTIAL BODIES LUNAR SPACECRAFT SURVEYOR 7 LUNAR PROBE . METEOROID SHOWERS SOFT LANDING GS LUNAR SPACECRAFT . . TAURID METEOROIDS SOFT LANDING SPACECRAFT . LUNAR PROBES . METEOROIDS . . SURVEYOR LUNAR PROBES . . TAURID METEOROIDS SURVEYOR 1 LUNAR PROBE . . . SURVEYOR 7 LUNAR PROBE GS LUNAR- - SPACECRAFT SOFT LANDING SPACECRAFT TAURUS CONSTELLATION . LUNAR PROBES . SURVEYOR LUNAR PROBES GS CONSTELLATIONS . . SURVEYOR LUNAR PROBES . . SURVEYOR 7 LUNAR PROBE . TAURUS CONSTELLATION . . . SURVEYOR 1 LUNAR PROBE UNMANNED SPACECRAFT RT CRAB NEBULA SOFT LANDING SPACECRAFT . SPACE PROBES PLEIADES CLUSTER . SURVEYOR LUNAR PROBES . . LUNAR PROBES T TAURI STARS . SURVEYOR-^ LUNAR PROBE . . . SURVEYOR LUNAR PROBES UNMANNED SPACECRAFT . . . . SURVEYOR 7 LUNAR PROBE TEKTITES . SPACE PROBES RT ATLAS CENTAUR LAUNCH VEHICLE GS CELESTIAL BODIES . . LUNAR PROBES . METEORITES . . . SURVEYOR LUNAR PROBES SWEDISH SPACE PROGRAM . STONY METEORITES . . . . SURVEYOR 1 LUNAR PROBE GS PROGRAMS . . . TEKTITES RT ATLAS CENTAUR LAUNCH VEHICLE SPACE PROGRAMS . . . AUSTRALITES . . SWEDISH SPACE PROGRAM . . . . BEDIASITES SURVEYOR 2 LUNAR PROBE RT EUROPEAN SPACE PROGRAMS RT CHONDRITES GS LUNAR SPACECRAFT SWEDEN COESITE . LUNAR PROBES CYRILLID METEOROIDS . . SURVEYOR LUNAR PROBES SWINGBY TECHNIQUE METEORITIC COMPOSITION . . . SURVEYOR 2 LUNAR PROBE UF GRAVITY ASSIST TRAJECTORIES METEORITIC MICROSTRUCTURES SOFT LANDING SPACECRAFT RT FLYBY MISSIONS MICROMETEORITES . SURVEYOR LUNAR PROBES GRAVITATIONAL EFFECTS NATURAL SATELLITES . . SURVEYOR 2 LUNAR PROBE INTERPLANETARY TRANSFER ORBITS UNMANNED SPACECRAFT ORBITAL MECHANICS TELESCOPES . SPACE PROBES PLANETARY ORBITS UF ASTRONOMICAL TELESCOPES . . LUNAR PROBES ROUND TRIP TRAJECTORIES GS TELESCOPES . . . SURVEYOR LUNAR PROBES SPACECRAFT TRAJECTORIES CELESCOPES . . . SURVEYOR 2 LUNAR PROBE . ClRCUMSOLAR TELESCOPES RT ATLAS CENTAUR LAUNCH VEHICLE SYMBIOTIC STARS . GAMMA RAY TELESCOPES GS CELESTIAL BODIES GRAZING INCIDENCE TELESCOPES SURVEYOR 3 LUNAR PROBE STARS . . GRIST (TELESCOPE) GS LUNAR SPACECRAFT . . DOUBLE STARS HELIOMETERS LUNAR PROBES . . . BINARY STARS PYROHELIOMETERS . . SURVEYOR LUNAR PROBES . . . . SYMBIOTIC STARS . INFRARED TELESCOPES . . SURVEYOR 3 LUNAR PROBE . . PECULIAR STARS . . SPACE INFRARED TELESCOPE SOFT LANDING SPACECRAFT . . SYMBIOTIC STARS FACILITY SURVEYOR LUNAR PROBES - . . VARIABLE STARS MANNED ORBITAL TELESCOPES . . SURVEYOR 3 LUNAR PROBE . . . SYMBIOTIC STARS . . APOLLO TELESCOPE MOUNT UNMANNED SPACECRAFT RT ABSORPTION SPECTRA PARTICLE TELESCOPES . SPACE PROBES ECLIPSING BINARY STARS RADIO TELESCOPES . . LUNAR PROBES EMISSION SPECTRA KILOMETER WAVE ORBITING . . . SURVEYOR LUNAR PROBES FLARE STARS TELESCOPE . . . . SURVEYOR 3 LUNAR PROBE M STARS . VERY LARGE ARRAY (VLA) TELEVISION CAMERAS

TEwWCONI) TEMPERAN~-(WNX) TEUPERANRE-(WNJ.) . . VERY LONG BASELINE ARRAY (VLBA) . LOW TEMPERATURE THERMAL PROTECTION . REFLECTING TELESCOPES . . CRYOGENIC TEMPERATURE THERMAL RADIATION . . STARSAT TELESCOPE . LUNAR TEMPERATURE THERMAL REACTORS . REFRACTING TELESCOPES . NEEL TEMPERATURE THERMAL RESISTANCE . SCHMIDT TELESCOPES . NOISE TEMPERATURE THERMAL RESOURCES . SPACEBORNE TELESCOPES . OPERATING TEMPERATURE THERMAL SHOCK . . GERMAN INFRARED LABORATORY . PLANETARY TEMPERATURE THERMAL SIMULATION . . nu eel^ SPACE TELESCOPE . PLASMA TEMPERATURE THEfiMAL STABILITY . . INFRARED SPACE OBSERVATORY . ROOM TEMPERANRE THERMAL STRESSES flSOI . SATELLIE TEMPEAANRE THERMAL VACUUM TESTS . . uRis (TELES~IPE) . SKIN TEMPERATURE (BIMOOY) THERMODYNAMIC EFFlClENCY . . SOLAR OPTICAL TELESCOPE . SOUVl TEMPERATURE THERMODYNAMIC PROPERTIES . . SPACE INFRARED TELESCOPE . SPACE TEMPERATURE VENTILATION FACILITY . SPIN TEMPERATURE . . STARLAB . STAGNATION TEMPERATURE TERMINAL VELOCITY . . STARSAT TELESCOPE . STELLAR TEMPERATURE GS RATES (PER TIME) . . X RAY ASTROPHYSICS FACILITY . SUBZERO TEMPERATURE . TERMtNAL VELOCITY . SPECTROSCOPIC TELESCOPES . SURFACE TEMPERATURE VELOCITY . . MULTISPECTRAL TRACKING . . SKIN TEMPERATURE . TERMINAL VELOCITY TELESCOPES (NON-BIOLOGICAL) RT GRAVITATION . . STRATOSCOPE TELESCOPES . . WAU TEMPERATURE . ULTRAVIOLET TELESCOPES TRANSITION TEMPERATURE TERMINATOR LINES . . STARLAB . WATER TEMPERATURE RT *LINES X RAY TELESCOPES . . OCEAN TEMPERATURE LUNAR PHASES . X RAY ASTROPHYSICS FACILITY . . . SEA SURFACE TEMPERATURE L,P~ASES RT ANTENNAS RT ABLATIVE MATERIALS SUNRISE ASTRONOMICAL OBSERVATORIES ADIABATIC CONDITIONS SUNSET ASTRONOMY AIRCONDITIONING BALLOON-BORNE INSTRUMENTS BIOLOGICAL EFFECTS TERRAIN BINOCULARS CLIMATOLOGY UF LANDSCAPE CASSEGRAIN OPTICS COMFORT GS TOPOGRAPHY CORONAGRAPHS CONVECTIVE FLOW . +ERRAIM ETALONS ELECTRON ENERGY RT GEOMORPHOLOGY EYEPIECES EMlSSlVlN LANDFORMS LENSES ENVIRONMENTS LANDMARKS MIRRORS FREE CONVEGTION MULTI-ANODE MICROCHANNEL ARRAYS GEOEMPERATURE OPTICAL EQUIPMENT GIBBSHELMHOLTZ EQUA'I TERRAlN ANALYSIS OPTICAL MEASURING INSTRUMENTS HEAT UF SATAN (SENSOR) RT =ANALYZING OPTICAL TRANSFER FUNCTION HEAT SHIELDING CHANGE DETECTION PERISCOPES HEAT STORAGE EARTH RESOURCES REFLECTORS HEATING SCHMIDT CAMERAS HUMIDITY EROS (SATELLITES) GEOGRAPHIC APPLICATIONS PROGRAM SOLAR INSTRUMENTS ISOTHERMS SPACEBORNE ASTRONOMY LAPSE RATE HOLOGRAMMETRY ULTRAVIOLET ASTRONOMY MELTING POINTS MAPPING NAP-OF-THE-EARTH NAVIGATION METEOROLOGY OCEAN THERMAL ENERGY CONVERSION PHOTOGRAMMETRY TELEVISION CAMERAS RECONNAISSANCE GS OPTICAL EQUIPMENT REFRIGERATING SAHA EQUATIONS SATELLITE SURFACES . CAMERAS SOIL MAPPING . . TELEVISION CAMERAS SURFACE COOLING TEMPERATURE COMPENSATION VIDEO LANDMARK ACQUISITION AN0 PHOTOGRAPHIC EQUIPMENT TRACKING . CAMERAS TEMPERATURE CONTROL TELEVISION CAMERAS TEMPERATURE DEPENDENCE . . TEMPERATURE DISTRIBUTION TERRESTRIAL MAGNETISM TELEVISION EQUIPMENT USE GEOMAGNETISM . TELEVISION CAMERAS TEMPERATURE EFFECTS TEMPERATURE GRADIENTS RT CAMERA TUBES TERRESTRIAL PIANETS CLOSED CIRCUIT TELEVISION TEMPERATURE INVERSIONS TEMPERATURE MEASUREMENT GS CELESTIAL BODIES LALLEMAND CAMERAS PLANETS OPTICAL SCANNERS TEMPERATURE MEASURING INSTRUMENTS TERRESTRIAL PLANETS ORTHICONS EARTH (PLANET) RASTER SCANNING TEMPERATURE PROBES TEMPERATURE PROFILES MARS (PLANET) RETURN BEAM VIDICONS MERCURY (PLANET) SATELLITE TELEVISION TEMPERATURE RATIO TEMPERATURE SCALES VENUS (PLANET) TEMPERATURE SENSORS RT CELESTIAL MECHANICS TEMPEL 2 COMET TEPHIGRAMS MERCURY SURFACE GS CELESTIAL BODIES THERMAL ABSORPTION PLANETARY ENVIRONMENTS . COMETS THERMAL ANALYSIS PLANETOLOGY . . TEMPEL 2 COMET THERMAL BLOOMING SOLAR SYSTEM RT %COMA THERMAL BOUNDARY LAYER METEOROIDS THERMAL BUCKLING TERRESTRlAl RADIATION SOLAR SYSTEM THERMAL COMFORT SN (EXCLUDES ATMOSPHERIC RADIATION THERMAL CONDUCTIVITY AND REFLECTED VISIBLE LIGHT) TEMPERATURE THERMAL CONDUCTIVITY GAGES UF EARTH RADIATION UF BODY TEMPERATURE (NON-BIOLOGICAL) THERMAL CONDUCTORS GS ELECTROMAGNETIC RADIATION GS TEMPERATURE THERMAL CONTROL COATINGS TERRESTRIAL RADIATION ABSOLUTE ZERO THERMAL CYCLING TESTS RT ATMOSPHERIC RADIATION . AMBIENT TEMPERATURE THERMAL DECOMPOSITION EARTH (PLANET) ATMOSPHERIC TEMPERATURE THERMAL DEGRADATION EARTH ALBEDO AURORAL TEMPERATURE THERMAL DIFFUSION EARTH RADIATION BUDGET IONOSPHERIC TEMPERATURE THERMAL DlFFUSlVlTY EARTH RADIATION BUDGET BODY TEMPERATURE THERMAL DISSOCIATION EXPERIMENT BRIGHTNESS TEMPERATURE THERMAL EMISSION EXTRATERRESTRIAL RADIATION COMBUSTION TEMPERATURE THERMAL ENERGY FAR INFRARED RADIATION CRITICAL TEMPERATURE THERMAL ENVIRONMENTS GREENHOUSE EFFECT CURIE TEMPERATURE THERMAL EXPANSION INFRARED RADIATION FLAME TEMPERATURE THERMAL FATIGUE NEAR INFRARED RADIATION GAS TEMPERATURE THERMAL INSTABILITY PLANETARY RADIATION GLASS-TRANSITION TEMPERATURE THERMAL INSULATION x RADIATION HIGH TEMPERATURE THERMAL MAPPING TROPOSPHERIC RADIATION IGNITION TEMPERATURE THERMAL NEUTRONS . . FLASH POINT THERMAL NOISE mvs . INLET TEMPERATURE THERMAL PLASMAS GS CELESTIAL BODIES ION TEMPERATURE THERMAL POLLUTION , NATURAL SATELLITES TORO ASTEROID

rnvs-(CONT.) TITANIA-(WNT) . . ICY SATELLITES io~osmt~~ . . ICY SATELLITES . . . rnYS EARTH MAGNETOSPHERE . . . TlTANlA . . SATURN SATELLITES EXOSPHERE . . URANUS SATELLITES . . . rnYS HETEROSPHERE . . . TlTANlA RT SATURN (PLANET) HOMOSPHERE RT URANUS (PLANET)

THEOWUrrS THREE BODY PROBLEM TONK METEORWE GS MEASURING INSTRUMENTS RT CELESTIAL MECHANICS GS CELESTIAL BODIES . OPTICAL MEASURING INSTRUMENTS FOUR BODY PROBLEM . METEORITES . . TRANSITS MANY BODY PROBLEM . . STONY METEORITES . . . THEODOUTES ORBITS . . . CKlNDRlTES . . . . CINETHEODOLITES PERTURBATION . . . . CARBONACEOUS METEORITES OPTICAL EQUIPMENT mPROBLEMS . . . . . TONK METEORITE . OPTICAL MEASURING INSTRUMENTS TROJAN ORBITS . . TRANSITS TWO BODY PROBLEM TOWaPAPHY . . . mEoooUrrS UF LANDSCAPE . . . . CINETHEODOLITES TIDAL OSClUATlON GS TOPOGRAPHY AT SEXTANTS USE TIDES . LUNAR TOPOGRAPHY . TERRAIN THERMAL ENVIRONMENTS ROES RT ALTIMETRY GS ENVIRONMENTS UF TIDAL OSCILLATION BADLANDS . THERMAI. ENVIRONMENTS GS TIDES BARREN LAND RT ADIABATICCONDITIONS ATMOSPHERIC TIDES BEACHES AEROSPACE ENVIRONMENTS EARTH TIDES CUFFS HEAT STROKE . LUNAR TIDES CONTOUR SENSORS HIGH TEMPERATURE ENVIRONMENTS AT COASTALCURRENTS CONTOURS LIFE SUPPORT SYSTEMS ESTUARIES CUSPS (LANDFORMS) LOW TEMPERATURE ENVIRONMENTS FLOOD DAMAGE m DEPRESSION LUNAR ENVIRONMENT FLOODS DESERTLINE PLANETARY ENVIRONMENTS OCEAN CURRENTS DESERTS SATELLITE TEMPERANRE OCEAN SURFACE DUNES SPACECRAFT ENVIRONMENTS OCEANOORAPHY EARTH SURFACE TEMPERATURE PRESSURE ICE ELEVATION THERMAL COMFORT SEA ROUGHNESS ELNATION ANGLE TIDAL FLATS ESCARPMENTS THERMAL MAPP1NQ TIM POWERED GENERATORS GEODESY GS MAPPING TIDE WWERED-- MACHINES GEODETIC SURVEYS . THERMAL MAPPINQ TIDEP~wEA GEOMORPHOLOGY RT AERIAL RECONNAlSSANCE WATER CURRENTS GEOPnYSlCS EARTH RESOURCES WATERWAVE ENERGY CONVERSION GULFS GEOTHERMAL ANOMALIES WATERWAVE POWERED MACHINES HIGHLANDS GEOTHERMAL RESOURCES WETLANDS HYPSOGRAPHY HEAT CAPACITY MAPPING MISSION ISTHMUSES INFRARED RADIOMETERS TILT JUPITER RED SPOT INFRARED SCANNERS USE ATTITUDE (INCLINATION) LAGOONS ISOTHERMAL LAYERS LAND ISOTHERMS TILTING LANDFORMS PHOTOMAPPING USE ATTITUDE (INCLINATION) LANDMARKS PLANETARY MAPPING LEDGES TEMPERATURE TIME MAPPING TEMPERATURE DISTRIBUTION UF DURATION MARIA TEMPERATURE GRADIENTS GS TIME MARS SURFACE THERMOGRAPHY . ACCESS TlME MEANDERS . BURNING TIME MUSKEGS THERMAL RADIATION . DOWNTIME OCEANOGRAPHY SN (EMITTED AS THE RESULT OF THERMAL . EPHEMERIS TlME PEAKS (LANDFORMS) EXCITATION OF MOLECULES) . FLIGHT TIME PENEPLAINS GS ELECTROMAGNETIC RADIATION . MTBF PHOTOMAPPING . THERMAL RADIATION . REACTION TlME PLAINS . . BLACK BODY RADIATION . . CHRONAXY PLANETARY SURFACES . . PHONON BEAMS . RELAXATION TlME rn PROFILES RT CONCENTRATORS . RESPONSE TlME (COMPUTERS) RAVINES GREENHOUSE EFFECT . SIDEREAL TlME RELIEF MAPS HEAT . TESTING TlME SATELLITE ALTIMETRY INFRARED RADIATION . TRANSIT TlME SHALLOW WATER LIGHT (VISIBLE RADIATION) . UNIVERSAL TlME SLOPES NEAR INFRARED RADIATION RT CALENDARS STAIRSTEPS NONGRAY GAS CELESTIAL GEODESY SURFACE ROUGHNESS NONTHERMAL RADIATION CHRONOLOGY TOPEX PLANCKS CONSTANT EXPOSURE VALLEYS PLANETARY RADIATION INTERVALS VENUS SURFACE z RADIATION LAUNCH DATES WADIS RADIO WAVES MONTH SKY RADIATION PROLONGATION TOPS (SPACECRAFT) SOLAR RADIATION RELATIVISTIC EFFECTS UF THERMOELECTRIC OUTER PLANET SUNLIGHT SCHEDULES SPACECRAFT TEMPERATURE SYNCHRONISM THERMOELECTRIC SPACECRAFT THERMODYNAMIC PROPERTIES TlME MEASUREMENT GS INTERPLANETARY SPACECRAFT ULTRAVIOLET RADIATION UNITS OF MEASUREMENT . TOPS (SPACECRAFT) RT FLYBY MISSIONS THERMOELECTRIC OUTER PLANET SPACECRAFT TlTAN INTERPLANETARY FLIGHT USE TOPS (SPACECRAFT) GS CELESTIAL BODIES OUTER PLANETS EXPLORERS . NATURAL SATELLITES SPACE EXPLORATION THERMOELECTRIC SPACECRAFT . . SATURN SATELLITES SPACE MISSIONS USE TOPS (SPACECRAFT) . . . TITAN mSPACECRAFT RT ATMOSPHERIC COMPOSITION THERMOSPHERE CHARON TORO ASTEROID SN (ALTITUDES ABOVE APPROXIMATELY 80 SATELLITE ATMOSPHERES GS CELESTIAL BODIES KM) SATURN (PLANET) ASTEROID BELTS GS EARTH ATMOSPHERE TRITON ASTEROIDS UPPER ATMOSPHERE TORO ASTEROID . THERMOSPHERE TITANIA RT METEOROIDS . . . TURBOPAUSE GS CELESTIAL BODIES SOLAR SYSTEM RT CHEMOSPHERE . NATURAL SATELLITES SPACE DEBRIS TRACKING (POSITION)

TRACKINQ (POSITION) TRAJECTORY ANALYSIS TROPOWHERE UF TRACKING STUDIES RT GOANALYZING SN (GROUND LEVEL TO APPROXIMATELY 15 GS TRACKING (POSITON) ASTRODYNAMICS KM) . COMPENSATORY TRACKING BALLISTICS GS EARTH ATMOSPHERE . INFRARED TRACKING CAPTURE EFFECT . LOWER ATMOSPHERE . MISSILE TRACKING CELESTIAL MECHANICS . . TROPOSPHERE . OPTICAL TRACKING EQUATIONS OF MOTION . . . TROPOPAUSE . PHOTOGRAPHIC TRACKING GODDARD TRAJECTORY RT CHEMOSPHERE . FOLYSTATION DOPPLER TRACKING DETERMINATION SYSTEM HOMOSPHERE SYSTEM IMPACT PREDK;TION INTASAT SATELUTE . wwrr TRACKINO MATHEMATICAL MODELS . RADAR TRACKING NUMERICAL ANALYSIS -RIG RADIAW . RAMTRACKING ORBITAL MECHANICS SN (EXCLUDES TERRESTRIAL RADIATION) . . WILDLIFE RAMOLOCATION PREFUGHT ANALYSIS GS ATMOSPHERIC RADIATION . RANGE AND RANGE RATE TRACKING SYSTEMS ANALYSIS . TROPOSPHERIC RADIATION . SPACE DETECTION AND TRACKING ELECTROMAGNETIC RADIATION . SYSTEM m TRANSIT . TROPOSPHERIC RADIATION . SPACECRAFT TRACKING SN (USE OF A MORE SPECIFIC TERM IS RT =RADIATION . . SATELLITE TRACKING RECOMMENDED-CONSULT THE TERMS SKY RADIATION . . . SATELLITE-TO-SATELLITE TRACKING LISTED BELOW STRATOSPHERE RADIATION . STAR TRACKERS RT OCCULTATION TERRESTRIAL RADIATION . . CCD STAR TRACKER TRANSIT SATELLITES . VIDEO LAF!DMARK ACQUISITION AND TRANSITS TUMBLING MOTION TRACKING RT ATTITUDE STABILITY RT AIR TRAFFIC CONTROL DESTABILIZATION AIRCRAFT DETECTION TRANSIT TIME MIXERS APPROACH CONTROL SN (NOT LIMITED TO ASTRONOMICAL mMOTION -DIFECTlON - - - . -. TIMES OF TRANSIT) ROTATING ENVIRONMENTS IDENTIFYING GS TIME SATELLITE ROTATION INSTRUMENT LANDING SYSTEMS . TRANSIT TIME mSEPARATlON LASER RANGERITRACKER RT BARRlTT DIODES SPACECRAFT MOTION MULTISPECTRAL TRACKING CArr DEVICES SPACECRAFT STABILITY TELESCOPES FUGHT TIME mMOTION POSITION (LOCATION) TUNQU~umoRm RANGEFINDING GS CELESTIAL BODIES RAY TRACING TRIWSUTIONAL MonoN . METEORITES , SATELUTE DOPPLER POSITIONING GS TRANSLATIONAL MOTION . . STONY METEORITES SOLAR SENSORS . THREE DIMENSIONAL MOTION . . . TUI#WI( METEORITE SOUND LOCAUZATION . . THREE DIMENSIONAL FLOW RT METEORITE CRATERS SOUND RANGING . . . KARMAN-BODEWADT FLOW TRACKING PROBLEM . . . SECONDARY FLOW =TRACKS TURBOPAUSE RT mMOTION GS EARTH ATMOSPHERE RACKS (GEARS) . UPPER ATMOSPHERE RIGID STRUCTURES . TRACKING STUDIES . . THERMOSPHERE USE TRACKING (POSITION) . . . TURBOPAUSE TRANSLUNAR SPACE RT ATMOSPHERIC CIRCULATION USE INTERPLANETARY SPACE ATMOSPHERIC PHYSICS ATMOSPHERIC TURBULENCE TRAJECTORIES GS TRAJECTORIES TRrrON . ABORT TRAJECTORIES GS CELESTIAL BODIES TURBULENT MlXlNQ . ASCENT TRAJECTORIES . NATURAL SATELLITES GS MlXlNG . BALLISTIC TRAJECTORIES . . TRITON . TURBULENT MlXlNG . DESCENT TRAJECTORIES RT GAULEAN SATELLITES RT AGITATION . . REENTRY TRAJECTORIES NEPTLINE (PLANET) LAMINAR MlXlNG . HYPERBOLIC TRAJECTORIES NEPTUNE ATMOSPHERE MlXlNG LENGTH FLOW THEORY . INTERORBITAL TRAJECTORISS SATELLITE ATMOSPHERES RECIRCULATIVE FLUID FLOW . MIDCOURSE TRAJECTORIES TITAN TRAPPED VORTEXES . MISSILE TRAJECTORIES VORTICES . MOLECULAR TRAJECTORIES TROlLIn . PARTICLE TRAJECTORIES GS CHALCUGENIDES TWENTY-SEVEN DAY VARIATION ELECTRON TRAJECTORIES . SULFIDES GS VARIATIONS RENDEZVOUS TRAJECTORIES . . PYRRHOTITE . TMNTY-SEVEN DAY VARIATION ROUND TRIP TRAJECTORIES . . . TROlLlTE RT SOLAR CYCLES . . CIRCUMLUNAR TRAJECTORIES IRON COMPOUNDS SOLAR ROTATION . SPACECRAFT TRAJECTORIES . PYRRHOTITE STARSPOTS . . EARTH-VENUS TRAJECTORIES . . TROILITE SUNSPOTS . . INTERPLANETARY TRAJECTORIES MINERALS . . . EARTH-MARS TRAJECTORIES . PYRRHOTITE TWILIGHT GLOW . . . EARTH-MERCURY TRAJECTORIES . . TROlUTE GS ATMOSPHERIC RADIATION . . LUNAR TRAJECTORIES SULFUR COMPOUNDS SKY RADIATION . . . CIRCUMLUNAR TRAJECTORIES . SULFIDES . . AIRGLOW . . . EAR H-MOON TRAJECTORIES . . PYRRHOTITE . . . TWILIGHT GLOW . . . MOON-EARTH TRAJECTORIES . TROILITE ELECTROMAGNETIC RADIATION SPINNING UNGUIDED ROCKET RT IRON METEORITES . LIGHT (VISIBLE RADIATION) TRAJECTORY METEORITIC COMPOSITION . . SKY RADIATION . UNDERWATER TRAJECTORIES . . . AIRGLOW RT APEXES TROJAN ORBlTS . . . . TWILIGHT GLOW BALLISTICS RT DAYGLOW mCURVES GS ORBITS . SPACECRAFT ORBITS NIGHT DOWNRANGE NIGHT SKY EQUATIONS OF MOTION . . TROJAN ORBITS P FLIGHT RT CELESTIAL MECHANICS FLIGHT MECHANICS MANY BODY PROBLEM TWO BODY ORBITS FLIGHT OPTIMIZATION THREE BODY PROBLEM USE TWO BODY PROBLEM FLIGHT PATHS FLIGHT TIME TROPOPAUSE TWO BODY PROBLEM GREAT CIRCLES SN (ALTITUDE APPROXIMATELY 15 TO 20 UF TWO BODY ORBITS MISSILES KM) RT BINARY STARS ORBITS GS EARTH ATMOSPHERE CELESTIAL MECHANICS ORDNANCE LOWER ATMOSPHERE EARTH-MOON SYSTEM PARABOLIC FLIGHT - TROPOSPHERE HYLLERAAS COORDINATES P PATHS TROPOPAUSE MANY BODY PROBLEM ROCKET FLIGHT RT DIURNAL VARIATIONS ORBITAL MECHANICS SPACE FLIGHT ISOTHERMAL LAYERS ORBITS TRANSFER ORBITS MIDDLE ATMOSPHERE PERTURBATION ULTRAVIOLET RADIATION

U.S.S.R. SPACE PROGRAM-(CONT) TWO BODY PROBEM-(CONX) TYPE 4 BURSTS GS BURSTS INTERNATIONAL COOPERATION CQ PROBLEMS . RADlO BURSTS INTERNATIONAL RELATIONS ROCHE LIMIT INTERNATIONAL SATELLITE GEODESY THREE BODY PROBLEM . . SOLAR-.- RADlO BURSTS . . . TYPE 4 BURSTS EXPERIMENT ELECTROMAGNETIC RADIATION LUNAR RETROREFLECTORS NCHO CRATER . RADlO WAVES LUNlK LUNAR PROBES GS CRATERS . . EXTRATERRESTRIAL RADIO WAVES LUNIK 19 LUNAR PROBE LUNlK 22 LUNAR PROBE . LUNAR CRATERS . . . RADIO BURSTS . . NW CRATER . . . . &V\U RADIO BURSTS LUNOKHOD LUNAR ROVING VEHICLES RT METEORITE CRATERS ..... NPE4BURSTS MARS 1 SPACECRAFT . . . SOLAR RADIO EMISSON MARS 2 SPACECRAFT . . . . SOLAR RADlO BURSTS MARS 3 SPACECRAFT MARS 4 SPACECRAFT - -- ..... NPE4BURSTS GS BURSTS . . RAMEMISSK>N MARS 5 SPACECRAFT . RADlO BURSTS . . . RADIO BURSTS MARS 6 SPACECRAFT . . SOLAR RADIO BURSTS . . . . SOLAR RADlO BURSTS MARS 7 SPACECRAFT . . . NPE 2 BURSTS . . . . . NPE 4 BURSTS MIR SPACE STATION ELECTROMAGNETIC--- - RADIATION . . . SOLAR RADlO EMISSION MOLNIYA SATELLITES . RADlO WAVES . . . . SOLAR RADlO BURSTS PROTON SATELLITES . . EXTRATERRESTRIAL RADlO WAVES . . . . . TYPE 4 BURSTS SALYUT SPACE STATION . . . RADlO BURSTS EMISSION SOYUZ SPACECRAFT . . . . SOLAR RADlO BURSTS , RADlO EMISSION VEGA PROJECT . . . . . NPE 2 BURSTS . . RADlO BURSTS VENERA SATELLITES . . . SOLAR RADlO EMISSION . . . SOLAR RADlO BURSTS VENERA 8 SATELLITE . . . . SOLAR RADlO BURSTS .... TYPE4BURSTS VENERA 10 SATELLITE ..... NPE2BURSTS . . SOLAR RADlO EMISSION VENERA 11 SATELLITE . . RADIO EMISSION . . . SOLAR RADlO BURSTS VENERA 12 SATELLITE . . . RADlO BURSTS . . . . NPE 4 BURSTS . . . . SOLAR RADlO BURSTS EXTRATERRESTRIAL RADIATION UBV SPECTRA ..... NPE2BURSrS . EXTRATERRESTRIAL RADlO WAVES GS SPECTRA . . . SOLAR RADIO EMISSION . . RADIO BURSTS . RADIATION SPECTRA . . . . SOLAR RADIO BURSTS . . . SOLAR RADIO BURSTS . . ELECTROMAGNETIC SPECTRA . . . . . TYPE 2 BURSTS . . . . NPE 4 BURSTS . . . UBV SPECTRA EMISSION . . SOLAR RADlO EMISSION RT COLOR-COLOR DIAGRAM . RADIO EMISSION . . . SOLAR RADlO BURSTS . . RADlO BURSTS . . . . NPE 4 BURSTS UFO . . . SOLAR RADlO BURSTS . SOLAR RADIATION USE UNIDENTIFIED FLYING OBJECTS ....NPEZBURSl5 . . SOLAR RADlO EMISSION . . SOLAR RADlO EMISSION . . . SOLAR RADlO BURSTS UHURU SATELUTE . . . SOLAR RADlO BURSTS . . . . TYPE 4 BURSTS . . . . NPE 2 BURSTS UF EXPLORER 42 SATELLITE EXTRATERRESTRIAL RADIATION GS ARTIFICIAL SATELLITES TYPE 5 BURSTS . SCIENTIFIC SATELLITES , EXTRATERRESTRIAL RADlO WAVES . . RADlO BURSTS GS BURSTS . . EXPLORER SATELLITES . . . SOLAR RADlO BURSTS . RADlO BURSTS . . . UHURU SATELLITE . . . . TYPE 2 BURSTS . . SOLAR RADlO BURSTS RT GALACTIC RADIATION . . SOLAR RADlO EMISSION . . . TYPE 5 BURSTS SAS . . . SOLAR RADIO BURSTS ELECTROMAGNETIC RADIATION SATELLITE OBSERVATION RADlO WAVES X RAY ASTRONOMY . . . . NPE 2 BURSTS . . SOLAR RADIATION . . EXTRATERRESTRIAL RADlO WAVES X RAY STARS . . SOLAR RADlO EMISSION . . . RADlO BURSTS . . . SOLAR RADlO BURSTS . . . . RADlO BURSTS UK SPACE PROGRAM NPE 2 BURSTS . . . . . NPE 5 BURSTS GS PROGRAMS . . . SOLAR RADlO EMISSION . SPACE PROGRAMS . . . . SOLAR RADlO BURSTS . . UK SPACE PROGRAM NPE 3 BURSTS . . . . . NPE 5 BURSTS RT HOTOL LAUNCH VEHICLE GS BURSTS . . RADlO EMISSION UK SATELLITES . RADlO BURSTS . . . RADlO BURSTS UNITED KINGWM . . SOLAR--- RADlO BURSTS . . . . SOLAR RADlO BURSTS ...NPE3BURSrS .....TYPESBURSTS ULTRAVIOLET ASTRONOMY ELECTROMAGNETIC RADIATION . . . SOLAR RADlO EMISSION GS ASTRONOMY . RADlO WAVES . . . . SOLAR RADlO BURSTS . ULTRAVIOLET ASTRONOMY . . EXTRATERRESTRIAL RADlO WAVES . . . . . NPE 5 BURSTS RT ELECTROMAGNETIC RADIATION . . . RADlO BURSTS EMISSION EXTREME ULTRAVIOLET EXPLORER . . . . SOLAR RADlO BURSTS RADlO EMISSION SATELLITE . . . . . NPE 3 BURSTS . . RADIO BURSTS HUBBLE SPACE TELESCOPE . . . SOLAR RADlO EMISSION . . . SOLAR RADIO BURSTS LYMAN ALPHA RADlATlON . . . . SOLAR RADlO BURSTS . . . . TYPE 5 BURSTS LYMAN BETA RADIATION . . . . . NPE 3 BURSTS . . SOLAR RADlO EMISSION SPARTAN SATELLITES . . RADlO EMISSION . . . SOLAR RADlO BURSTS STARSAT TELESCOPE . . . RADlO BURSTS . . . . TYPE 5 BURSTS TELESCOPES . . . . SOLAR RADlO BURSTS EXTRATERRESTRIAL RADIATION ULTRAVIOLET TELESCOPES . . . . . TYPE 3 BURSTS . EXTRATERRESTRIAL RADlO WAVES RADlO BURSTS . . . SOLAR RADlO EMISSION . . ULTRAVIOLET LIGHT SOLAR RADlO BURSTS . . . . SOLAR RADlO BURSTS . . . USE ULTRAVIOLET RADIATION . . . . . NPE 3 BURSTS . . . . TYPE 5 BURSTS EMISSION . . SOLAR RADlO EMISSION . RADlO EMISSION . . . SOLAR RADlO BURSTS ULTRAVIOLET RADIATION . . RADlO BURSTS . . . . TYPE 5 BURSTS UF ULTRAVIOLET LIGHT SOLAR RADlO BURSTS . SOLAR RADIATION GS ELECTROMAGNETIC RADIATION . . . ULTRAVIOLET RADIATION TYPE 3 BURSTS . . SOLAR RADlO EMISSION . . . EXTREME ULTRAVIOLET RAClATlON . . SOLAR RADlO EMISSION . . . SOLAR RADlO BURSTS FAR ULTRAVIOLET RADIATION . . SOLAR RADlO BURSTS . . . . TYPE 5 BURSTS . LYMAN ALPHA RADIATION . . . TYPE 3 BURSTS LYMAN BETA RADIATION EXTRATERRESTRIAL RADIATION NEAR ULTRAVIOLET RADlATlON . EXTRATERRESTRIAL RADlO WAVES . . RADlO BURSTS IONIZING RADIATION . . SOLAR RADlO BURSTS ULTRAVIOLET RADIATION EXTREME ULTRAVIOLET RADIATION TYPE 3 BURSTS . . . FAR ULTRAVIOLET RADIATION SOLAR RADlO EMISSION LYMAN ALPHA RADIATION . . . SOLAR RADlO BURSTS U.S.S.R. SPACE PROGRAM TYPE 3 BURSTS GS PROGRAMS LYMAN BETA RADIATI9N NEAR ULTRAVIOLET RADIATION . SOLAR RADIATION . SPACE PROGRAMS RT BEAMS (RADIATION) . . SOLAR RADlO EMISSION . . U.S.S.R. SPACE PROGRAM BLACK BODY RADIATION . . . SOLAR RADlO BURSTS RT APOLLO SOYUZ TEST PROJECT CERENKOV RADIATION . . . . TYPE 3 BURSTS EUROPEAN SPACE PROGRAMS ULTRAVIOLET SPECTRA

ULTRAVIOLET RADIATION-(WNT) UWBRAS URANUS ATMOSPHERE COnERENT ELECTROMAGNETIC RT ECLIPSES GS ENVIRONMENTS RADIATION PENUMBRAS . EXTRATERRESTRIAL ENVIRONMENTS CORONAL HOLES SHADOWS . . PLANETARY ENVIRONMENTS DAYGLOW . . . PLANETARY ATMOSPHERES IUE UMBRIEL . . . . URANUS ATMOSPHERE MICROCHANNELS GS CELESTIAL BODIES RT AEROSPACE ENVIRONMENTS MONOCHROMATIC RADIATION . NATURAL SATELLITES m ATMOSPHERES POLARIZED ELECTROMAGNETIC URANUS SATELLITES GAS GIANT PLANETS RADIATION . . UUBRlEL HYDROGEN ca RADIATION . . . RT URANUS (PLANET) ME~WANEPLANETARY IONOSPHERES SEYFERT GALAXIES SOLAR RADIATION URANUS (PLANET) STERIUZATION UMKEHR EFFLCT SUNUGHT RT -EFFECTS URANUS RtNOS THERMAL RADIATION UGHT SCAllERING GS CELESTIAL BODIES ULTRAVIOLET DETECTORS OZONOSPHERE . PLANETARY RlNGS UMKEHR EFFECT SUNLIGHT . . URANUS RINGS ULTRAVIOLET RADIATION RT JUPITER RlNGS ULTRAVIOLET SPECTRA NATURAL SATELLITES GS SPECTRA UNIDENTIFIU) FLYING OBJECTS PLANETARY STRUCTURE . RADIATION SPECTRA UF UFO r RlNGS . . ELECTROMAGNETIC SPECTRA AT *AIRCRAFT SATURN RINGS . . . ULTRAVIOLET SPECTRA EXTRATERRESTRIAL INTELLIGENCE URANUS (PLANET) RT ABSORPTION SPECTRA mSPACECRAFT EMISSION SPECTRA w VEHICLES URANUS SATELLITES HERZBERG BANDS GS CELESTIAL BODIES LIGHT (VISIBLE RADIATION) . NATURAL SATELLITES LINE SPECTRA UNIVERSE UF METAGALAXY . . URANUS SATELLITES LYMAN SPECTRA . . . ARlEL MOLECULAR SPECTRA RT BIG BANG COSMOLOGY CELESTIAL BODIES . . . MIRANDA RADIO SPECTROSCOPY . . . OBERON SOLAR SPECTRA COSMOLOGY co COSMOS . . . TlTANlA STELLAR SPECTRA . . . UMBRIEL ULTRAVIOLET DETECTORS DARK MAllER REUC RADIATION UV Cm STARS ULTRAVIOLET SPEclROlMAPHS USE FLARE STARS USE ULTRAVIOLET SPECTROMETERS UPPER AIR USE UPPER ATMOSPHERE ULTRAVIOLET SPECTROMETERS UF ULTRAVIOLET SPECTROGRAPHS UPPER ATMOSPHERE GS MEASURING INSTRUMENTS UF UPPER AIR . OPTICAL MEASURING INSTRUMENTS GS EARTH ATMOSPHERE . . PHOTOMETERS UPPER ATMOSPHERE . VACUUM ULTRAVIOLET RADIATION . . . ULTRAVIOLET SPECTROMETERS . EARTH IONOSPHERE . USE FAR ULTRAVIOLET RADIATION . RADIATION MEASURING INSTRUMENT . . . E REGION . . ACTINOMETERS . . . . E-l LAYER . . . ULTRAVIOLET DETECTORS . . . . E-2 LAYER VALLEYS . . . . U.LTRAVIOLR SPECTROMETERS . . . SPORADIC E LAYER UF INTERMONTANE FLOORS . . PHOTOMETERS . . LOWER IONOSPHERE RIFT VALLEYS--- - . . . ULTRAVIOLET specmoIumRs . . . . D REGION RILLS . SPECTROMETERS . . . UPPER IONOSPHERE GS VALLEYS . . ULTRAVIOLET SPECTROMETERS . . . . F REGION . COACHELLA VALLEY (CAI. . . . . HlGH DISPERSION . . . . . F 1 REGION . DEATH VALLEY (CA) SPECTROGRAPHS . . . . . F 2 REGION . IMPERIAL VALLEY (CA) OPTICAL EQUIPMENT . . EXOSPHERE . MAGDALENA-CAUCA VALLEY . OPTICAL MEASURING INSTRUMENTS . . THERMOSPHERE (COLOMBIA) . . PHOTOMETERS . . . TURBOPAUSE . PAL0 VERDE VALLEY (CA) . . . ULTRAVIOLET SPECTROMETERS RT ACOUSTIC SOUNDING . POTOMAC RIVER VALLEY (MD-VA-WVI RT EBERT SPECTROMETERS AERONOMY . SACRAMENTO VALLEY (cA) SOLAR MAXIMUM MISSION CHEMOSPHERE . SAN JOAQUIN VALLEY (CA) SOLAR SPECTROMETERS HETEROSPHERE . SHENANWAH VALLEY (VA) HlGH ALTITUDE . ST LAWRENCE VALLEY (NORTH ULTRAVIOLET SPECTROXOPY HOMOSPHERE AMERICA) GS SPECTROSCOPY METEOR TRAILS . TENNESSEE' VALLEY (AL-KY-TN) . ULTRAVIOLET SPECTROSCOPY METEOROLOGICAL BALLOONS RT CANYONS RT ABSORPTION SPECTROSCOPY MIDDLE ATMOSPHERE DELAWARE RIVER BASIN (US) ASTRONOMICAL SPECTROSCOPY OZONOSPHERE EROSION MOLECULAR SPECTROSCOPY PLASMASPHERE MEANDERS OPTOGALVANIC SPECTROSCOPY PROTON PRECIPITATION MISSOURI RIVER (US) RADIO SPECTROSCOPY RADIATION BELTS RAVINES SPECTROSCOPIC ANALYSIS SATELLITE ATMOSPHERES RIVERS SPECTRUM ANALYSIS STRUCTURAL BASINS VACUUM SPECTROSCOPY UPPER IONOSPHERE SUSOUEHANNA RIVER BASIN X RAY SPECTROSCOPY GS EARTH ATMOSPHERE (MD-NY-PA) . UPPER ATMOSPHERE TOPOGRAPHY ULTRAVIOLET TELESCOPES . . EARTH IONOSPHERE WADIS GS TELESCOPES . . . UPPER IONOSPHERE WATERSHEDS . ULTRAVIOLET TELESCOPES . . . . F REGION . . STARLAB . . . . . F 1 REGION VAN ALLEN RADIATION BELTS RT FAR ULTRAVIOLET RADIATION . . . . . F 2 REGION USE RADIATION BELTS SPACEBORNE ASTRONOMY RT E REGION ULTRAVIOLET ASTRONOMY VAN BIESBROECK STAR X RAY ASTRONOMY URANUS IPLANEn GS CELESTIAL BODIES GS CELESTIAL BODIES STARS ULYSSES MISSION PLANETS LATE STARS UF INTERNATIONAL SOLAR POLAR MISSION . . GAS GIANT PLANETS COOL STARS GS SPACE MISSIONS . . . URANUS (PLANET) M STARS ULYSSES MISSION RT ARlEL VAN BIESBROECK STAR RT INERTIAL UPPER STAGE MIRANDA MISSION PLANNING OBERON--- - VARIABLE STARS -r MISSIONS TlTANlA GS CELESTIAL BODIES SOLAR MAXIMUM MISSION UMBRIEL STARS SOLAR PROBES URANUS ATMOSPHERE VARIABLE STARS SUN URANUS RINGS CATACLYSMIC VARIABLES VENERA 8 SATELLITE

VELOCITY flELDS VENERA 3 SATEUTE-(CONT.) VARIABLE STARS-(CONE) VENERA 3 SATELLITE CEPHEID VARIABLES USE VELOCITY DISTRIBUTION . . . . . UNMANNED SPACECRAFT FLARE STARS . . . . SPACE PROBES . . . IRREGULAR VARIABLE STARS VELOCITY PROFtLES VENUS PROBES R CORONAE BOREALIS STARS ...... USE VELOCITY DISTRIBUTION . VENERA SATELLITES LAMBDA TAURI STARS ...... VENERA 3 SATELLITE . . . MlRA VARIABLES VENERA SATELLITES . . . . OMICRON CETl STAR GS ARTIFICIAL SATELLITES . . . NOVAE SOVlET SATELUTES VENERA 4 SATELLIE . GS ARTIFICIAL SATELLITES . . . . DWARF NOVAE VENERA SATEms . . SOVIET SATELLITES . . . . HERCULES NOVA VENERA 2 SATELLITE . . . . VENERA SATELLITES . . . SEMIREGULAR VARIABLE ST4 . . . VENERA 3 SATELLITE . . . . . SUPERNOVAE . . . VENERA 4 SATELLITE . . . VENERA 4 SATELLITE INTERPMNETARY SPACECRAFT . . . . SUPERNOVA 1987A . . . VENERA 5 SATELLITE . . . SYMBIOTIC STARS . VENUS PROBES . . . VENERA 6 SATELLITE . VENERA SATELLITES . . . T TAURI STARS VENERA 7 SATELLITE . . . . . VENERA 4 SATELLITE RT BINARY STARS VENERA 8 SATELUTE . . . . . SOVlET SPACECRAFT COMPANION STARS VENERA 9 SATELLITE . . . VENERA SATELLITES ECLIPSING BINARY STARS VENERA 10 SATELLITE . . . VENERA 4 SATELLITE PERIODIC VARIATIONS VENERA 11 SATELLITE . . . . . UNMANNED SPACECRAFT SOLAR OSCILLATIONS VENERA 12 SATELLITE . . . SPACE PROBES STELLAR MASS INTERPLANETARY SPACECRAFT . VENUS PROBES STELLAR MASS EJECTION VENUS PROBES . . . . . VENERA SATELLITES STELLAR OSCILLATIONS . . VENERA SATELLITES . . . . . VENERA 4 SATELLITE . . . VENERA 2 SATELLITE VENERA 3 SATELLITE VEGA PROJECT ...... VENERA 4 SATELLITE VENERA 5 SATELLITE RT FLYBY MISSIONS GS ARTIFICIAL SATELLITES HALLCI'S COMET . . . VENERA 5 SATELLITE . . . VENERA 6 SATELLITE . SOVIET SATELLITES INTERNATlONAL COOPERATION . . VENERA SATELLITES U.S.S.R. SPACE PROGRAM . . . VENERA 7 SATELLITE . . . VENERA 8 SATELLVE . . . VENERA 5 SATELLITE VENERA SATELLITES INTERPLANETARY SPACECRAFT VENUS (PLANET) . . . VENERA 9 SATELLITE . . . VENERA 10 SATELUTE . VENUS PROBES . . . VENERA 11 SATELLITE . . VENERA SATELLITES VELOCITY . . . VENERA 12 SATELLITE . . . VENERA 5 SATELLITE UF SPEED SOVlET SPACECRAFT SOVlET SPACECRAFT GS VELOCITY . VENERA SATELUTES . VENERA SATELLITES . ACOUSTIC VELOCITY . . VENERA 2 SATELLITE . . VENERA 5 SATELLITE . AIRSPEED . . VENERA 3 SATELLITE UNMANNED SPACECRAFT . ANGULAR VELOCITY . . VENERA 4 SATELLITE . SPACE PROBES . CRITICAL VELOCITY . . VENERA 5 SATELLITE . . VENUS PROBES . ESCAPE VELOCITY . . VENERA 6 SATELUTE . . . VENERA SATELLITES . EXHAUST VELOCITY . . VENERA 7 SATELLITE . . . . VENERA 5 SATELLITE . FLOW VELOCITY . . VENERA 6 SATELLITE . . SOLAR WlND VELOCITY . . VENERA 9 SATELLITE VENERA 6 SATELLITE . GROUND SPEED . . VENERA 10 SATELLITE GS ARTIFICIAL SATELLITES . GROUP VELOCITY . . VENERA 11 SATELLITE . SOVIET SATELLITES . HIGH SPEED . . VENERA 12 SATELLITE . . VENERA SATELLITES , HYPERSONIC SPEED UNMANNED SPACECRAFT . . . VENERA 8 SATELLITE , LANDING SPEED . SPACE PROBES INTERPLANETARY SPACECRAFT . LIGHT SPEED . . VENUS PROBES . VENUS PROBES . LOW SPEED . . . VENERA SATELLITES . . VENERA SATELLITES . ORBITAL VELOCITY . . . . VENERA 2 SATELLITE . . . VENERA 6 SATELLITE . PHASE VELOCITY . . . . VENERA 3 SATELLITE SOVIET SPACECRAFT . PROPAGATION VELOCITY . . . . VENERA 4 SATELLITE . VENERA SATELLITES . RADIAL VELOCITY . . . . VENERA 5 SATELLITE . . VENERA 6 SATELLITE . RELATIVISTIC VELOCITY . . . . VENERA 6 SATELLITE UNMANNED SPACECRAFT . ROTOR SPEED . . . . VENERA 7 SATELLITE . SPACE PROBES . SOLAR VELOCITY . . . . VENERA 8 SATELLITE . . VENUS PROBES . SUBSONIC SPEED . . . . VENERA 9 SATELLITE . . . VENERA SATELLITES . SUPERSONIC SPEED . . . . VENERA 10 SATELLITE . . . . VENERA 6 SATELLITE . TERMINAL VELOCITY . . . . VENERA 11 SATELLITE . TIP SPEED . . . . VENERA 12 SATELLITE VENERA 7 SATELLITE . TRANSONIC SPEED RT U.S.S.R. SPACE PROGRAM GS ARTIFICIAL SATELLITES . WlND VELOCITY VEGA PROJECT . SOVIET SATELLITES . . SOLAR WlND VELOCITY . VENERA SATELLITES RT ACCELERATION (PHYSICS) VENERA 2 SATELLITE . . . VENERA 7 SATELLITE BODY KINEMATICS GS ARTIFICIAL SATELLITES INTERPLANETARY SPACECRAFT DE BROGLlE WAVELENGTHS . SOVIET SATELLITES VENUS PROBES r DYNAMICS . . VENERA SATELLITES . . VENERA SATELLITES FERMAT PRINCIPLE . . . VENERA 2 SATELLITE VENERA 7 SATELLITE KINEMATICS INTERPLANETARY SPACECRAFT SOVIET SPACECRAFT KINETICS . VENUS PROBES VENERA SATELLITES LOADING RATE . . VENERA SATELLITES . . VENERA 7 SATELLITE a MOTION . . . VENERA 2 SATELLITE UNMANNED SPACECRAFT PERCEPTUAL TIME CONSTANT SOVlET SPACECRAFT . SPACE PROBES PRESSURE MEASUREMENT . VENERA SATELLITES . . VENUS PROBES RELATIVISTIC EFFECTS . . VENERA 2 SATELLITE . . . VENERA SATELLITES SOLITARY WAVES UNMANNED SPACECRAFT . . . . VENERA 7 SATELLITE TIME MEASUREMENT . SPACE PROBES . . VENUS PROBES VENERA 8 SATELLITE VENERA SATELLITES VELOCITY DISTRIBUTION . . . GS ARTIFICIAL SATELLITES VENERA 2 SATELLITE UF VELOCITY FIELDS . . . . SOVIET SATELLITES VELOCITY PROFILES VENERA SATELLITES GS DISTRIBUTION (PROPERTY) VENERA 3 SATELLITE VENERA 8 SATELLITE . VELOCITY DISTRIBUTION GS ARTIFICIAL SATELLITES INTERPLANETARY SPACECRAFT RT CIRCULATION DISTRIBUTION . SOVIET SATELLITES VENUS PROBES FLOW DISTRIBUTION . . VENERA SATELLITES VENERA SATELLITES FLOW VELOCITY . . . VENERA 3 SATELLITE VENERA 8 SATELLITE GALACTIC ROTATlOlJ INTERPLANETARY SPACECRAFT SOVIET SPACECRAFT ORR-SOMMERFELD EQUATIONS . VENUS PROBES VENERA SATELLITES POHLHAUSEN METHOD . . VENERA SATELLITES VENERA 8 SATEUITE PRESSURE DISTRIBUTION . . . VENERA 3 SATELLITE UNMANNED SPACECRAFT SHOCK WAVE PROFILES SOVIET SPACECRAFT SPACE PROBES THREE DIMENSIONAL BOUNDARY LA ,YER . VENERA SATELLITES VENUS PROBES VENERA 9 SATELLITE

VENERA 8 SATELLITE-(WNE) VENUS (PLAN~(CONZ) VENUS PROBES-(WNZ) . . . VENERA SATELUTES VENERA 8 SATELLITE . . . . VENERA 11 SATELLITE . . . . VENERA 8 SATELLITE VENERA 10 SATELLITE . . . . VENERA 12 SATELLITE RT U.S.S.R. SPACE PROGRAM VENERA 11 SATELLITE . . . ZOND 1 SPACE PROBE VENUS (PLANET) VENERA 12 SATELLITE . . . ZOND 3 SPACE PROBE . . . ZOND 4 SPACE PROBE VENERA S SATELUTE VENUS ATMOSPHERE . . . ZOND 5 SPACE PROBE GS ARTIFICIAL SATELLITES GS ENVIRONMENTS . . . ZOND 8 SPACE PROBE . SOVIET SATELLITES . EXTRATERRESTRIAL ENVIRONMENTS . . . ZOND 7 SPACE PROBE . . VENERA SATELLITES . . PLANETARY ENVIRONMENTS . . . ZOND 8 SPACE PROBE . . . VENERA S SATUUTE . . . PLANETARY ATMOSPHERES RT MAGELLAN PROJECT (NASA) INTERPLANETARY SPACECRAFT . . . . ATMOSlPnERE MARINER PROORAM . VENUS PROBES . . . . . VENUS CLOUDS MARINER VENUS 67 SPACECRAFT . . VENERA SATELLITES RT AEROSPACE ENVIRONMENTS MARS PROBES ... ~RASBITELLITE IONOPAUSE OWER PLANETS EXPLORERS SOVlET SPACECRAFT PLANETARY IONOSPHERES SWTNIK 5 SATELLITE . VENERA SATELUTES PLANETARY METEOROLOGY VENUS ORBITING IMAGING RADAR . . VENERA s SATELLITE VENERA 11 SATELLITE (SPACECRAFT) UNMANNED SPACECRAFT VENERA 12 SATELUTE VOYAGER PROJECT . SPACE PROBES . . VENUS PROBES VENUS RADAR ECHOES . . . VENERA SATELLITES GS ECHOES-- -- . RADAR ECHOES . . . VENERA 9 SATELLITE VENUS CLOUDS .VENUS RADAR ECHOES GS ENVIRONMENTS . . VENERA 10 SATELLITE . EXTRATERRESTRIAL ENVIRONMENTS GS ARTlFlClAL SATELUTES . . PLANETARY ENVIRONMENTS VENUS RADAR MAPPER . SOVIET SATELLITES . . . PLANETARY ATMOSPHERES USE MAGELLAN SPACECRAFT (NASA) . . VENERA SATELLITES . . . . VENUS ATMOSPHERE . . . VENERA 10 SATELLITE . . . . . VENUS CLOUDS VENUS RADAR MAPPER PROJECT INTERPLANETARY SPACECRAFT RT ATMOSPHERIC MODELS USE MAGELLAN PROJECT (NASA) . VENUS PROBES CLOUD COVER . . VENERA SATELUTES CLOUD PnYSlCS MNUS SURFACE . . . VENERA 10 SATELLITE rn CLOUDS GS PLANETARY SURFACES SOVIET SPACECRAFT GREENHOUSE EFFECT . VENUS SURFACE . VENERA SATELUTES RT CLOUD COVER VENERA 10 SATELLITE . . VENUS ouBmNa IUA(UWRADAR EXTRATERRESTRIAL ENVIRONMENTS UNMANNED SPACECRAFT (SPACECRAFT) MAGELLAN PROJECT (NASA) SPACE PROBES . GS RADAR MAGELLAN SPACECRAFT (NASA) VENUS PROBES . . VENUS ORBlTlNa IMAQING RADAR PLANETARY CRATERS . . . VENERA SATELLITES . (SPACECRAFT) SOLAR SYSTEM VENERA 10 SATELLITE . . . . RT MAGELUN PROJECT (NASA) m SURFACES RT U.S.S.R. SPACE PROGRAM MAGELLAN SPACECRAFT (NASA) TOPOGRAPHY VENUS (PLANET) SYNTHETIC APERTURE RADAR VENERA 11 SATELLITE VENUS ATMOSPHERE VENERA 12 SATELLITE VENERA 11 SATELLTE VENUS PROBES VENUS ORBITING IMAGING RADAR GS ARTIFICIAL SATELLITES VENUS SURFACE (SPACECRAFT) . SOVIET SATELLITES . . VENERA SATELLITES VENUS PROBES VErnES . . . VENERA 11 SATELLITE USE APEXES INTERPLANETARY SPACECRAFT GS INTERPLANETARY SPACECRAFT . VENUS PROBES . VENUS PROBES . MAGELLAN SPACECRAFT (NASA) VENERA SATELUTES . . VERY LARQE ARRAY (VLA) . . MARINER 1 SPACE PROBE VENERA 11 SATELLITE . . GS RADlO EQUIPMENT . . . MARINER 2 SPACE PROBE SOVIET SPACECRAFT . . RADIO TELESCOPES . VENERA SATELLITES . . MARINER 5 SPACE PROBE . . VERY URGE ARRAY (VLA) . MARINER 10 SPACE PROBE . . VENERA 11 SATELLITE . TELESCOPES UNMANNED SPACECRAFT . . PIONEER VENUS 2 SPACECRAFT . HADlO TELESCOPES . SPACE PROBES . . . PIONEER VENUS 2 TRANSPORTER . . VERY LARQE ARRAY (VLA) . . VENUS PROBES BUS RT ANTENNA ARRAYS . . . VENERA SATELLITES . . VENERA SATELLITES RADlO ASTRONOMY VENVA 2 SATELLITE . . . . VENERA 11 SATELLITE . . . RT U.S.S.R. SPACE PROORAM . . . VENERA 3 SATELLITE VERY LONG BASE INTERFEROMETRY VENUS (PLANET) . . . VENERA 4 SATELLITE UF VLBl VENUS ATMOSPHERE . . . VENERA 5 SATELLITE GS INTERFEROMETRY VENUS SURFACE . . . VENERA 6 SATELLITE . VERY LONG BASE INTERFEROMETRY . . . VENERA 7 SATELLITE RT DIFFRACTION PATTERNS . . . VENERA 8 SATELLITE ETALONS VENERA 12 SATELLITE . . . VENERA 9 SATELLITE GS ARTIFICIAL SATELLITES INTERFEROMETERS . . . VENERA 10 SATELLITE NULL ZONES SOVlET SATELLITES . . . VENERA 11 SATELLITE . . VENERA SATELLITES QUASAT . . . VENERA 12 SATELLITE RADlO ASTRONOMY . . . VENERA 12 SATELLITE . . ZOND 1 SPACE PROBE INTERPLANETARY SPACECRAFT RADlO INTERFEROMETERS . . ZOND 3 SPACE PROBE VERY LONG BASELINE ARRA ' (VLBA) . VENUS PROBES . . ZOND 4 SPACE PROBE . . VENERA SATELLITES . . ZOND 5 SPACE PROBE . . . VENERA 12 SATELLITE . . ZOND 6 SPACE PROBE VERY LONQ BASELINE ARRAY (VLBA) SOVIET SPACECRAFT . . ZOND 7 SPACE PROBE GS RADlO EQUIPMENT . VENERA SATELLITES . . ZOND 8 SPACE PROBE . RADlO TELESCOPES . . VENERA 12 SATELUTE UNMANNED SPACECRAFT . VERY LONQ BASELINE ARRAY UNMANNED SPACECRAFT . SPACE PROBES (VLBA) . SPACE PROBES . . VENUS PROBES TELESCOPES . . VENUS PROBES . . . MAGELLAN SPACECRAFT (NASA) RADlO TELESCOPES . . . VENERA SATELLITES . . . MARINER 1 SPACE PROBE VERY LONQ BASELINE ARRAY . . . . VENERA 12 SATELUTE . . . MARINER 2 SPACE PROBE (VLBA) RT U.S.S.R. SPACE PROGRAM . . . MARINER 5 SPACE PROBE RT ANTENNA ARRAYS VENUS (PLANET) . . . MARINER 10 SPACE PROBE RADlO ASTRONOMY VENUS ATMOSPHERE . . . VENERA SATELLITES VERY LONG BASE INTERFEROMETRY VENUS SURFACE . . . . VENERA 2 SATELLITE . . . . VENERA 3 SATELLITE VESTA ASTEROID VENUS (PLANET) . . . . VENERA 4 SATELLITE GS CELESTIAL BODIES GS CELESTIAL BODIES . . VENERA 5 SATELLITE ASTEROID BELTS . PLANETS . . . VENERA 6 SATELLITE ASTEROIDS . TERRESTRIAL PLANETS . . . VENERA 7 SATELLITE . VESTA ASTEROID . . . VENUS (PLANET) . . . . VENERA 8 SATELLITE RT METEOROIDS RT PLANETARY CRATERS . . . VENERA 9 SATELLITE SOLAR SYSTEM VEGA PROJECT . . . . VENERA 10 SATELLITE SPACE DEBRIS VIKING 75 ENTRY VEHICLE

VIBRATION VIKING LANDER l-(coNr) VIKING ORBITER 2-(CONT) UF JITTER SPACE EXPLORATION RT INTERPLANETARY TRAJECTORIES GS VIBRATION SPACE FLIGHT SPACE EXPLORATION . COMBUSTION VIBRATION SPACE FLIGHT . FORCED VIBRATION VlKlNG LANDER 2 r SPACECRAFT . FREE VIBRATION GS INTERPLANETARY SPACECRAFT . LAlTICE VIBRATIONS . MARS PROBES VIKING ORBITER 1975 . WOO EFFECTS . . VIKING SPACECRAFT GS INTERPLANETARY SPACECRAFT . RANDOM VIBRATION . . . VlKlNG LANDER SPACECRAFT . MARS PROBES . RESONANT VIBRATION . . . . VIKING WIDER 2 . . VIKING SPACECRAFT . STRUCTURAL VIBRATION . . . VIKING 2 SPACECRAFT . . . VlKlNG ORBITER SPACECRAFT . . BENDING VIBRATION . . . . VIKINQ UNDER 2 . . . . VlKlNQ ORBITER 1975 . . BREATHING VIBRATION UNMANNED SPACECRAFT UNMANNED SPACECRAFT . . FLUlXR . SPACE PROBES . SPACE PROBES . . . PANEL RUlTER . . MARS PROBES . . MARS PROBES . . . SUBSONIC FLUlTER . . . VlKlNG SPACECRAFT . . . VlKlNG SPACECRAFT . . . SUPERSONIC FLUrrER . . . . VlKlNG LANDER SPACECRAFT . . . . VlKlNG ORBITER SPACECRAFT . . . TRANSONIC FLUTTER . . . . . VlKlNQ LANOER 2 . . . . . VlKlNG ORBITER 1975 . . LINEAR VlBRATlON . . . . VlKlNG 2 SPACECRAFT MISSILE VIBRATION ...... VIKING LANDER 2 VlKlNG SPACECRAFT . . SELF INDUCED VIBRATION RT INTERPLANETARY TRAJECTORIES GS INTERPLANETARY SPACECRAFT . . . PANEL FLUTTER MARS SURFACE SAMPLES . MARS PROBES . . SUBSONIC FLUTTER SPACE EXPLORATION . . VlKlNG SPACECRAFT . . . SUPERSONIC FLUlTER SPACE FLIGHT . . VlKlNG LANDER SPACECRAFT . . . TRANSONIC FLUTTER . . . VlKlNG LANDER 1 TORSIONAL VIBRATION . . . VlKlNG MARS PROGRAM . . . . VlKlNG LANDER 2 RT ACOUSTICS GS PROGRAMS . . . VlKlNG ORBITER SPACECRAFT AIRFOIL OSCILLATIONS . NASA PROGRAMS . . . VIKING ORBITER 1 AMPLITUDES . . . NASA SPACE PROGRAMS . . VlKlNG ORBITER 2 ANTINODES . . . . . VIKING MARS PROGRAM . . . . VlKlNG ORBITER 1975 COMPACTING . SPACE PROGRAMS . . VlKlNG 1 SPACECRAFT CYCLIC LOADS . . . NASA SPACE PROGRAMS . VIKING LANDER 1 DISPLACEMENT ...... VIKING MARS PROORAM . . . . VlKlNG ORBITER 1 w DYNAMICS RT SPACE EXPLORATION VlKlNG 2 SPACECRAFT ELASTIC WAVES . . . - VlKlNG SPACECRAFT VIKING LANDER 2 FATIGUE (MATERIALS) . . . . VIKING ORBITER 2 FLAPPING . . . . UNMANNED SPACECRAFT HARMONICS VIKING ORBITER SPACECRAFT ISOLATORS GS INTERPLANETARY SPACECRAFT . SPACE PROBES MARS PROBES MARS PROBES MECHANICAL OSCILLATORS . . . MECHANICAL SHOCK . . VIKING SPACECRAFT . . . VIKING SPACECRAFT VIKING ORBITER SPACECRAFT VlKlNG LANDER SPACECRAFT MODES (STANDING WAVES) ...... VlKlNG ORBITER 1 . . . . . VIKING LANDER 1 r MOTION VlKlNG ORBITER 2 . . . . . VlKlNG LANDER 2 NODES (STANDING WAVES) . . . NUTATION . . . . VlKlNG ORBITER 1975 . . . . VlKlNG ORBITER SPACECRAFT OSCILLATING CYLINDERS UNMANNED SPACECRAFT . . . . . VIKING ORBITER 1 VlKlNG ORBITER 2 OSCILLATIONS . SPACE PROBES . . . . . MARS PROBES VlKlNG ORBITER 1975 OSCIUATORS ...... VlKlNG SPACECRAFT VlKlNG 1 SPACECRAFT RESONANCE ...... SHAKING . . . . VlKlNQ ORBITER SPACECRAFI . . . . . VlKlNG LANDER 1 SHOCK RESISTANCE . . . . . VlKlNG ORBITER 1 . . . . . VlKlNG ORBITER I SPACECRAFT MOTION . . . . . VlKlNG ORBITER 2 . . . . VlKlNG 2 SPACECRAFT STANDING WAVES . . . . . VlKlNG ORBITER 1975 . . . . . VlKlNG LANDER 2 VIBRATIONAL STRESS RT INTERPLANETARY TRAJECTORIES . . . . . VlKlNG ORBITER 2 VIBRATORY LOADS PLANETARY ORBITS RT VlKlNG MARS PROGRAM VIBRATORY POLISHING SPACE EXPLORATION SPACE FLIGHT ?o WAVES VIKING 1 SPACECRAFT WING OSCILLATIONS w SPACECRAFT GS INTERPLANETARY SPACECRAFT . MARS PROBES VlKlNG ORBITER 1 . . VlKlNG SPACECRAFT VlKlNG LANDER SPACECRAFT GS INTERPLANETARY SPACECRAFT . . . VlKlNG 1 SPACECRAFT GS INTERPLANETARY SPACECRAFT . MARS PROBES . . . . VlKlNG LANDER 1 . MARS PROBES . . VIKING SPACECRAFT . . . . VlKlNG ORBITER 1 . . VIKING SPACECRAFT . . . VlKlNG ORBITER SPACECRAFT UNMANNED SPACECRAFT . . VlKlNG LANDER SPACECRAFT . . . . . VlKlNG ORBITER 1 . SPACE PROBES . . . . VlKlNG LANDER 1 . . . VlKlNG 1 SPACECRAFT MARS PROBES . . . . VlKlNG LANDER 2 . . . . VlKlNG ORBITER 1 . . VlKlNG SPACECRAFT UNMANNED SPACECRAFT UNMANNED SPACECRAFT . . VlKlNG 1 SPACECRAFT . SPACE PROBES . SPACE PROBES . . . . . VlKlNG LANDER 1 . MARS PROBES . . . MARS PROBES . . . . . VlKlNG ORBITER 1 . . . VlKlNG SPACECRAFT . . . VlKlNG SPACECRAFT RT INTERPLANETARY TRAJECTORIES . . . . VlKlNG LANDER SPACECRAFT . . . . VlKlNG ORBITER SPACECRAFT SPACE EXPLORATION . . . . VlKlNG LANDER 1 . . . . . VlKlNG ORBITER 1 SPACE FLIGHT . . . . . VlKlNG LANDER 2 . . . . VlKlNG 1 SPACECRAFT RT INTERPLANETARY TRAJECTORIES . . . . . VlKlNG ORBITER 1 VlKlNG 2 SPACECRAFT SPACE EXPLORATION RT INTERPLANETARY TRAJECTORIES GS INTERPLANETARY SPACECRAFT SPACE FLIGHT SPACE EXPLORATION . MARS PROBES SPACE FLIGHT . . VIKING SPACECRAFT VIKING LANDER 1 mSPACECRAFT . . . VIKING 2 SPACECRAFT GS INTERPLANETARY SPACECRAFT . . . . VlKlNG LANDER 2 . MARS PROBES VlKlNG ORBITER 2 . . . . VIKING ORBITER 2 . . VlKlNG SPACECRAFT GS INTERPLANETARY SPACECRAFT UNMANNED SPACECRAFT . . . VlKlNG LANDER SPACECRAFT . MARS PROBES . SPACE PROBES . . . . VlKlNG LANDER 1 . VlKlNG SPACECRAFT . . MARS PROBES . . . VlKlNG 1 SPACECRAFT . . . VlKlNG ORBITER SPACECRAFT . . VlKlNG SPACECRAFT . . . . VlKlNG LANDER 1 . . . . VlKlNG ORBITER 2 . . . VlKlNG 2 SPACECRAFT UNMANNED SPACECRAFT . . . VlKlNG 2 SPACECRAFT . . . . . VlKlNG LANDER 2 . SPACE PROBES . . . . VlKlNG ORBITER 2 . . . . . VlKlNG ORBITER 2 . . MARS PROBES UNMANNED SPACECRAFT RT INTERPLANETARY TRAJECTORIES . . . VlKlNG SPACECRAFT . SPACE PROBES SPACE EXPLORATION . . . . VlKlNG LANDER SPACECRAFT . . MARS PROBES SPACE FLIGHT . . . . . VIKING LANDER 1 . . VlKlNG SPACECRAFT . . . . VlKlNG 1 SPACECRAFT . . . . VlKlNG ORBITER SPACECRAFT VlKlNG 75 ENTRY VEHICLE . . . . . VIKING LANOER 1 . . . . . VlKlNG ORBITER 2 GS INTERPLANETARY SPACECRAFT RT INTERPLANETARY TRAJECTORIES . . . . VlKlNG 2 SPACECRAFT MARS PROBES MARS SURFACE SAMPLES . . . . . VlKlNG ORBITER 2 VlKlNG 75 ENTRY VEHICLE VfNTl THEORY VOLCANOES-(CONT.) WEAK INTERACTIONS (FIELD THEoRY)-(CO~~) VIKING 75 ENTRY VEHICLE-(CONT.) FIELD THEORY (PHYSICS) RT MARS LANDING RT BASALT WEAK INTERACTIONS (FIELD THEORY) SOFT LANDING CALDERAS . CONES (VOLCANOES) NUCLEAR REACTIONS EFFUSIVES . NUCLEAR INTERACTIONS VlNTl THEORY WEAK INTERACTIONS (FIELD GS PERTURBATION THEORY GEOMORPHOLOGY GEOTHERMAL RESOURCES THEORY) . VINTI THEORY PARTICLE INTERACTIONS RT GEODESY LAVA MOUNTAINS . ELEMENTARY PARTICLE ORBIT PERTURBATION INTERACTIONS CaTHMRIES OROGRAPHY PALEOMAGNETISM . . WEAK ENERGY INTERACTIONS PETROLOGY . . . m*K INTERACT1ONS (FIELD Vlm GAUCTlC CLUSTER ROUSE BELTS THEORY) UF VIRGO STAR CLUm VOLCANOLWY . NUCLEAR INTERACIIONS GS CELESTIAL BODIES . . WEAK- INTERACTIONS (FIELD . GALAXIES THEORY) . . GALACTIC CLUSTERS VON nlPEL METHOD RT GRAND UNIFIED THEORY RT EQUATIONS OF MOTION . . . Vim GAUCTIC CLUSTER m INTERACTIONS HAMILTONIAN FUNCTIONS RT AGGLOMERATION STRONG INTERACTIONS (FIELD a METHODOLOGY BARRED GALAXIES THEORY) PERTURBATION THEORY x CLUSTERS m THEORIES DISK GALAXIES ELLIPTICAL GALAXIES VOYAGER PROJECT WEIGHTLESSNESS LOCAL GROUP (ASTRONOMY) GS PROGRAMS UF ZERO GRAVITY SPIRAL GALAXIES NASA PROGRAMS RT AEROSPACE MEDICINE STAR CLUSTERS . . NASA SPACE PROGRAMS ARTIFICIAL GRAVITY STAR DISTRIBUTION . . . VOYAGER PROJECT ASTRONAUT PERFORMANCE . PROJECTS r ASTRONAUTICS . . VOYAGER PROJECT BlOPROCESSlNG VIRGO STAR CLUSTER , SPACE PROGRAMS BLACKOUT PREVENTION USE VIRGO GALACTIC CLUSTER . . NASA SPACE PROGRAMS BODY WEIGHT . . . VOYAGER PROJECT BONE DEMINERALIZATION VlRlAL THEOREM RT MARS PROBES CONTAINERLESS MELTS GS THEOREMS SATURN PROJECT DISORIENTATION . VlRlAL THEOREM SPACE PROBES DROP TOWERS RT KINETIC ENERGY UNMANNED SPACECRAFT ELECTROLYTE METABOLISM KINETIC EQUATIONS VENUS PROBES ENVIRONMENTS mMECHANICS (PHYSICS) EXTRAVEHICULAR ACTIVITY MISSING MASS (ASTROPHYSICS) VOYAQER 1 SPACECRM FLIGHT STRESS (BIOLOGY) VlRlAL COEFFICIENTS GS INTERPLANETARY SPACECRAFT FREE FALL . VOYAGER 1 SPACECRAFT GRAVITATION VISIBLE RADIATION UNMANNED SPACECRAFT GRAVITATIONAL EFFECTS USE LIGHT (VISIBLE RADIATION) . SPACE PROBES INTRAVEHICULAR ACTIVITY . . VOYAGER 1 SPACECRAFT LIFE SGWRTSYSTEMS VISIBLE SPECTRUM RT FLYBY MISSIONS LOW WEIGHT GS SPECTRA GRAND TOURS LOWER BODY NEGATIVE PRESSURE . RADIATION SPECTRA JUPITER (PLANET) NEUTRAL BUOYANCY SIMULATION . . ELECTROMAGNETIC SPECTRA JUPITER PROBES PARABOLIC FLIGHT . . . VlSfBLE SPECTRUM JUPITER RINGS SPACE ADAPTATION SYNDROME RT mABSORPTlON mSPACECRAFT SPACE FLIGHT STRESS ABSORPTION SPECTRA SPACE MANUFACTURING ASTRONOMICAL SPECTROSCOPY VOYAGER 2 SPACECRAFT SPACE PROCESSING APPLICATIONS AURORAL SPECTROSCOPY GS INTERPLANETARY SPACECRAFT ROCKET CATHODOLUMINESCENCE . VOYAGER 2 SPACECRAFT SPACEBORNE EXPERIMENTS EMISSION SPECTRA UNMANNED SPACECRAFT SPACECRAFT ENVIRONMENTS GAS SPECTROSCOPY . SPACE PROBES SUBORBITAL FLIGHT LIGHT (VISIBLE RADIATION) . . VOYAGER 2 SPACECRAFT LINE SPECTRA RT FLYBY MISSIONS WEST COMET MOLECULAR SPECTRA GRAND TOURS GS CELESTIAL BODIES SOLAR SPECTRA JUPITER (PLANET) COMETS SPECTRAL BANDS JUPITER PROBES . . WEST COMET SPECTROSCOPY =SPACECRAFT RT SOLAR SYSTEM STELLAR SPECTRA VOYAGER i9n MISSION WHIRL VISUAL OBSERVATION GS SPACE MISSIONS USE ROTATION GS OBSERVATION . FLYBY MISSIONS . VISUAL OBSERVATION . . GRAND TOURS WHIRLING RT COMPANION STARS . . . VOYAGER 1977 MlSSlON USE ROTATION SPACE OBSERVATIONS (FROM EARTH) RT INTERPLANETARY SPACECRAFT JUPITER (PLANET) WHISTLERS VISUAL PHOTOMETRY JUPITER PROBES GS ATMOSPHERIC RADIATION GS OPTICAL MEASUREMENT 11 MISSIONS . IONOSPHERIC NOISE . PHOTOMETRY SOLAR SYSTEM . . WHISTLERS . . VISUAL PHOTOMETRY SPACE PROBES ELECTROMAGNETIC INTERFERENCE . RADIO FREQUENCY INTERFERENCE VLBl . . ELECTROMAGNETIC NOISE USE VERY LONG BASE INTERFEROMETRY . . . ATMOSPHERICS . . . . WHISTLERS VLF EMISSION RECORDERS . . . IONOSPHERIC NOISE RT ATMOSPHERIC RADIATION . . . . WHISTLERS ATMOSPHERICS W STARS ELECTROMAGNETIC RADIATION COSMIC RAYS USE WOLF-RAYET STARS . RADIO WAVES ELECTROMAGNETIC RADIATION . . SKY WAVES PLANETARY RADIATION W-R STARS . WHISTLERS aRECORDERS USE WOLF-RAYET STARS RT DAWN CHORUS RECORDING INSTRUMENTS ELECTROMAGNETIC FIELDS WAVE RADIATION LIGHTNING USE ELECTROMAGNETIC RADIATION MICROWAVES VOLCANOES RADIO SIGNALS UF ACTIVE VOLCANOES SONOGRAMS GS GEOLOGY WEAK INTERACTIONS (FIELD THEORY) VOLCANOES UF BETA INTERACTIONS . . MARS VOLCANOES GS DECAY WHITE DWARF STARS LANDFORMS . WEAK ENERGY INTERACTIONS GS CELESTIAL BODIES . VOLCANOES . . WEAK INTERACTIONS (FIELD STARS . . MARS VOLCANOES THEORY) . . EARLY STARS ZENITH wm DWARF STAR%(WNT) WOLF.RAYET STARS-(WNT) x RAY SPECTRA-(CONT) . . . HOT STARS ASTROPHYSICS . RADIATION SPECTRA . . . . WHITE DWARF STARS B STARS . . ELECTROMAGNETIC SPECTRA RT CATACLYSMIC VARIABLES CARBON STARS . . . X RAY SPECTRA DEGENERATE MATTER CELESTIAL MECHANICS RT NORTH POLAR SPUR (ASTRONOMY) DWARF NOVAE EJECTA QUASARS DWARF STARS HELIUM SOLAR SPECTRA RED DWARF STARS NITROGEN STELLAR SPECTRA SUBDWARF STARS o STARS SUPERNOVA REMNANTS STELLAR ENVELOPES X RAY SPECTROORAPHY WOLF-RAYET STARS STELLAR LUMINOSITY USE X RAY SPECTROSCOPY STEUAR MASS EJECTION WHITE DWARF STARS wm HOLES (ASTRONOIYY) X RAY SPECTROMETRY GS CELESTIAL BODIES USE X RAY SPECTROSCOPY . STARS WORLD WHm HOLES ~rnom,Mv) USE EARTH (PLANET) . . X RAY SPECTROPOLARIMETRY PAYLOAD GRAVITATIONAL COLLAPSE USE EXPOS (SPACELAB PAYLOAD) . WHm HOLES (ASTRONOMY) RT BLACK HOLES (ASTRONOMY) COSMOLOGY X RAY SPECTROSCOPY ELECTROMAGNETIC RADIATION UF X RAY SPECTROGRAPHY GRAVITATIONAL LENSES X RAY SPECTROMETRY LIGHT EMISSION X RAY ASTRONOMY GS SPECTROSCOPY NAKED SINGULARITIES GS ASTRONOMY X RAY SPECTROSCOPY SUPERNOVA REMNANTS . X RAY ASTRONOMY X RAY ANALYSIS . . X RAY SOURCES . X RAY SPECTROSCOPY WIDMANSTATEN STRUCTURE . . . X RAY BINARIES RT ASTRONOMICAL SPECTROSCOPY GS CRYSTAL STRUCTURE RT COSMIC X RAYS .a MATERIALS TESTS . WIDMANSTATEN STRUCTURE EXOSAT SATELLITE MOLECULAR SPECTROSCOPY MICROSTRUCTURE GAMMA RAY ASTRONOMY RADIO SPECTROSCOPY . WIDMANSTATEN STRUCTURE GAMMA RAY BURSTS RADIOGRAPHY RT IRON METEORITES GRAZING INCIDENCE TELESCOPES SPECTROSCOPIC ANALYSIS METALLOGRAPHY LlXlSCOPES ULTRAVIOLET SPECTROSCOPY METEORITIC MICROSTRUCTURES RADIOGRAPHY VACUUM SPECTROSCOPY r PATTERNS ROSAT MISSION SAM X RAY STARS WIGHTMAN THEORY UHURU SATELUTE UF EXTARS USE FIELD THEORY (PHYSICS) ULTRAVIOLET TELESCOPES GS CELESTIAL BODIES QUANTUM THEORY X RAY ASTROPHYSICS FAClLlTV . STARS RELATIVISTIC THEORY X RAY STARS . . X RAY STARS RT EMISSION SPECTRA WlND CIRCULATION X RAY ASTROPHYSICS FACILITY NEUTRON STARS USE ATMOSPHERIC CIRCULATION UF ADVANCED X RAY ASTROPHYSICS RADIATION SOURCES FACILITY STELLAR RADIATION WlND EFFECTS AXAF UHURU SATELLITE RT ATMOSPHERIC EFFECTS GS ARTIFICIAL SATELLITES X RAY ASTRONOMY DUNES . SCIENTIFIC SATELLITES X RAY BINARIES DUST STORMS . . ASTRONOMICAL SATELLITES X RAY SOURCES X RAY TELESCOPES co EFFECTS . . . X RAY ASTROPHYSICS FAClLlT EROSION OBSERVATORIES X RAYS GROUND WlND . ASTRONOMICAL OBSERVATORIES PRESSURE EFFECTS . . ASTRONOMICAL SATELLITES X RAY TELESCOPES SEA BREEZE . . . X RAY ASTROPHYSICS FACIUT GS TELESCOPES SEA ROUGHNESS PAYLOADS . X RAY TELESCOPES SEA STATES . SPACE SHUrnE PAYLOADS . . X RAY ASTROPHYSICS FACILITY SOIL EROSION . . X RAY ASTROPHYSICS FACILITY RT GRAZING INCIDENCE TELESCOPES TURBULENCE TELESCOPES RADIOGRAPHY WATER CIRCULATION . SPACEBORNE TELESCOPES ROSAT MISSION . . X RAY ASTROPHYSICS FACILITY X RAY STARS WlND EROSION . X RAY TELESCOPES GS EROSION . . X RAY ASTROPHYSICS FACILITY X RAYS . WIND EROSION RT ASTROPHYSICS GS ELECTROMAGNETIC RADIATION RT ATMOSPHERIC EFFECTS m FACILITIES . X RAYS GROUND WIND SPACEBORNE ASTRONOMY . COSMIC X RAYS PENEPLAINS X RAY ASTRONOMY . . SOLAR X-RAYS SEA BREEZE IONIZING RADIATION WATER EROSION X RAY BINARIES X RAYS GS ASTRONOMY . . COSMIC X RAYS WlND VELOCITY X RAY ASTRONOMY . SOLAR X-RAYS GS RATES (PER TIME) . . X RAY SOURCES RT AURORAS WlND VELOCITY . . . X RAY BINARIES BLACKOUT (PROPAGATION) . . SOLAR WlND VELOCITY RT ACCRETION DISKS BREMSSTRAHLUNG VELOCITY ASTROPHYSICS COSMIC RAYS . WlND VELOCITY BLACK HOLES (ASTRONOMY) EMISSION SPECTRA . . SOLAR WlND VELOCITY COMPANION STARS EXTRATERRESTRIAL RADIATION RT AIRSPEED COSMIC X RAYS FAR ULTRAVIOLET RADIATION ANEMOMETERS ECLIPSING BINARY STARS GAMMA RAYS FLOW MEASUREMENT NEUTRON STARS MONOCHROMATIC RADIATION GROUND WlND STELLAR MASS ACCRETION RADIOGRAPHY HOT-FILM ANEMOMETERS X RAY STARS RADIOLOGY SEA ROUGHNESS X RAYS SYNCHROTRON RADIATION WlND TURBINES SYSTEM GENERATED WINDMILLS (WINDPOWERED MACHINE X RAY SOURCES ELECTROMAGNETIC PULSES WINDPOWER UTILIZATION GS ASTRONOMY X RAY BINARIES WINDPOWERED GENERATORS . X RAY ASTRONOMY X RAY STARS . . X RAY SOURCES / WOLF-RAYET STARS . . . X RAY BINARIES UF W STARS RT COOLING FLOWS (ASTROPHYSICS) W-R STARS EXOSAT SATELLITE GS CELESTIAL BODIES z RADIATION . STARS ROSAT MISSION . EARLY STARS X RAY STARS ZENITH . . . HOT STARS AT ANTIPODES . . . . WOLF-RAYET STARS X RAY SPECTRA APEXES RT A STARS GS SPECTRA CELESTIAL SPHERE ZERO GRAVITY

ZEN~~-(CONX) Z~NDSPACE PROBES-(CONX) ZOND 6 SPACE PROBE-(CONX) MAXIMA . . ZOND 4 SPACE PROBE . ZOND SPACE PROBES NOON . . ZOND 5 SPACE PROBE . . ZOND 6 SPACE PROBE SOLAR POSITION . . ZOND 6 SPACE PROBE UNMANNED SPACECRAFT . . ZOND 7 SPACE PROBE . SPACE PROBES ZERO GRAVITY . . ZOND 8 SPACE PROBE . . VENUS PROBES USE WEIGHTLESSNESS RT MARS PROBES . . . ZOND 6 SPACE PROBE . ZOND SPACE PROBES ZETA AURIGAE STAR LOND 1 SPACE PROBE . . LOND 6 SPACE PROBE GS CELESTIAL BODIES GS INTERPLANETARY SPACECRAFT . STARS . VENUS PROBES ZOND 7 SPACE PROBE . . DOUBLE STARS . . ZOND 1 SPACE PROBE GS INTERPLANETARY SPACECRAFT . . . BINARY STARS . ZOND SPACE PROBES . VENUS PROBES . . . . ECLIPSING BINARY STARS . . ZOND 1 SPACE PROBE . . ZOND 7 SPACE PROBE . . . . . reTI AURlGAE STAR SOVIET SPACECRAFT . ZOND SPACE PROBES RT AURIGA CONSTELLATION . ZOND SPACE PROBES . . ZOND 7 SPACE PROBE . . ZOND 1 SPACE PROBE SOVIET SPACECRAFT ZODIAC UNMANNED SPACECRAFT . ZOND SPACE PROBES AT CONSTELLATIONS . SPACE PROBES . . ZOND 7 SPACE PROBE ECLIPTIC . . VENUS PROBES UNMANNED SPACECRAFT SCORPIUS CONSTELLATION . . . ZOND 1 SPACE PROBE . SPACE PROBES SCUTUM CONSTELLATION . ZOND SPACE PROBES . . VENUS PROBES . . ZOND 1 SPACE PROBE . . . ZOND 7 SPACE PROBE ZOOIACAL DUST . ZOND SPACE PROBES GS CELESTIAL BODIES ZOND 2 SPACE PROBE . . 20ND 7 SPACE PROBE . METEOROIDS GS INTERPLANETARY SPACECRAFT . . MKXIOMETEOROIDS . MARS PROBES ZOND 8 SPACE PROBE . . . METEOROID DUST CLOUDS . . ZOND 2 SPACE PROBE GS INTERPLANETARY SPACECRAFT . . . . ZODIACAL DUST . ZOND SPACE PROBES . VENUS PROBES MEDIA . . ZOND 2 SPACE PROBE . . ZOND 8 SPACE PROBE . INTERPIANETARY MEDIUM SOVIET SPACECRAFT . ZOND SPACE PROBES . . INTERPLANETARY DUST . ZOND SPACE PROBES . . ZOND 8 SPACE PROBE . . . METEOROlD DUST CLOUOS . . ZOND 2 SPACE PROBE SOVIET SPACECRAFT . . . . ZODIACAL DUST UNMANNED SPACECRAFT . ZOND SPACE PROBES PARTICLES . SPACE PROBES . . ZOMD 8 SPACE PROBE . DUST . . MARS PROBES UNMANNED SPACECRAFT . . COSMIC DUST . . . LOND 2 SPACE PROBE . SPACE PROBES . . . INTERPLANETARY DUST . ZOND SPACE PROBES . . VENUS PROBES . . . . METEOROID DUST CLOUDS . . ZOND 2 SPACE PROBE . . . ZOND 8 SPACE PROBE . . . . . ZODIACAL WST . ZOND SPACE PROBES RT EXPLORER SATELUTES ZOND 3 SPACE PROBE . . ZOND 8 SPACE PROBE MICROMETEORITES GS INTERPLANETARY SPACECRAFT POYNTING-ROBERTSON EFFECT . VENUS PROBES TERRESTRIAL DUST BELT . . ZOND 3 SPACE PROBE . ZOND SPACE PROBES ZODIACAL UGHT . . ZOND 3 SPACE PROBE GS ELECTROMAGNETIC RADIATION SOVIET SPACECRAFT . LIGHT (VISIBLE RADIATION) . ZOND SPACE PROBES . . ZODIACAL UGHT . . ZOND 3 SPACE PROBE EXTRATERRESTRIAL RADIATION UNMANNED SPACECRAFT . ZODIACAL UGHT . SPACE PROBES RT GEGENSCHEIN . . VENUS PROBES HELIOS PROJECT . . . ZOND 3 SPACE PROBE MICROMETEOROIDS . ZOND SPACE PROBES NIGHT SKY . . ZOND 3 SPACE PROBE POLARIZED LIGHT POYNTING-ROBERTSON EFFECT ZOND 4 SPACE PROBE SKY BRIGHTNESS GS INTERPLANETARY SPACECRAFT SOLAR RADIATION . VENUS PROBES SUNUGHT . . ZOND 4 SPACE PROBE . ZOND SPACE PROBES ZONAL HARMONICS . . ZOND 4 SPACE PROBE GS ANALYSIS (MATHEMATICS) SOVIET SPACECRAFT . FUNCTIONAL ANALYSIS . ZOND SPACE PROBES . . HARMONIC ANALYSIS . . ZOND 4 SPACE PROBE . . . ZONAL HARMONICS UNMANNED SPACECRAFT HARMONICS . SPACE PROBES . ZONAL HARMONICS . . VENUS PROBES . . . ZOND 4 SPACE PROBE ZOND SPACE PROBES . ZOND SPACE PROBES GS INTERPLANETARY SPACECRAFT . . ZOND 4 SPACE PROBE . ZOND SPACE PROBES . . ZOND 1 SPACE PROBE ZUND 5 SPACE PROBE . . ZOND 2 SPACE PROBE GS INTERPLANETARY SPACECRAFT . . ZOND 3 SPACE PROBE . VENUS PROBES . . ZOND 4 SPACE PROBE . . ZOND 5 SPACE PROBE . . ZOND 5 SPACE PROBE . ZOND SPACE PROBES . . ZOND 6 SPACE PROBE . . ZOND 5 SPACE PROBE . . ZOND 7 SPACE PROBE SOVIET SPACECRAFT . . ZOND 8 SPACE PROBE . ZOND SPACE PROBES SOVIET SPACECRAFT . . ZOND 5 SPACE =BE, ZOND SPACE PROBES UNMANNED SPACECRAFT ZOND 1 SPACE PROBE . SPACE PROBES ZOND 2 SPACE PROBE . . VENUS PROBES . . ZOND 3 SPACE PROBE . . . ZOND 5 SPACE PROBE ZOND 4 SPACE PROBE . ZOND SPACE PROBES . . ZOND 5 SPACE PROBE . . ZOND 5 SPACE PROBE . . ZOND 6 SPACE PROBE . . ZOND 7 SPACE PROBE ZONO 6 SPACE PROBE ZOND 8 SPACE PROBE GS INTERPLANETARY SPACECRAFT UNMANNED SPACECRAFT VENUS PROBES ZOND SPACE PROBES . . ZOND 6 SPACE PROBE . . ZOND 1 SPACE PROBE . ZOND SPACE PROBES . . ZOND 2 SPACE PROBE . . ZOND 6 SPACE PROBE . . ZOND 3 SPACE PROBE SOVIET SPACECRAFT NASA Thesaurus Astronomy Vocabulary

A terminology of descriptors used by the NASA Scientific and Technical Information effort to index documents in the area of astronomy is presented. The terms are presented in a hierarchical format derived from the 1988 edition of the NASA Thesaurus Volume 1--Hierarchical Listing. Over 1600 terms are included. In addition to astronomy per se, space sciences covered include astrophysics, cosmology, lunar flight and exploration, meteors and meteor- ites, celestial mechanics, planetary flight and exploration, and planetary science.

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