List of acronyms used in Space Flight

Author: pagheca Date: 15 May 2014 Version: v1.1

This list was initially created from NASA but will be integrated with any acronym found related to space flight

Versions log: • V1.1 starting document. • V1.2 added RUD, BRF, MLAS, CCiCap, CCDEV, NGLS, EBF3, EFT-1, CMB, LDSD, MALLR, NTR, MTV, HSF and many others…

A ampere A analog A analog signal A&A advertise and award A&CO activation and checkout A&COTA assembly and checkout technical analysis A&E architects and engineers A&E architectural and engineering A&L approach and landing A&P airframe and power plant A&P attitude and pointing A&PS Administration and Program Support (MSFC directorate) A&R assembly and recycle A&R automation and robotics A&RC application and resource control A&S alignment and stabilization A&SS alignment and stabilization subsystem A&T assembly and test A&TA assembly and test area A-G air-to-ground A/A air-to-air A/A airplane avionics A/A analog-to-analog A/A angular accelerometer A/B airborne A/C air conditioning A/C aircraft A/C associate contractor A/D analog-to-digital A/F air-to-fuel ratio A/F airframe A/FM arm firing mechanism A/G air-to-ground A/J antijam A/L airlock A/L approach and landing A/L autoland A/M area to mass A/M auto/manual A/N account name A/N alphanumeric A/O analog output A/P airport A/P autopilot A/R as required A/R autoland roll-out A/S acquisition sensor A/S airspeed A/S arm/safe A/S ascent stage A/S auxiliary stage AA accelerated assembly AA associate administrator AA accelerometer assembly AA affirmative action AA air-to-air AA airplane avionics AA American Airlines AA angular accelerometer AA antiaircraft AA Associate of Arts degree AA/AL airplane avionics/autoland AA/AL automatic approach/autoland AAA allocations, assessments, and analysis AAA astronaut-actuated abort AABNCP Advanced Airborne National Command Post AACCS analytical approach to candidate constellation selection AACPSM actual average cost per successful mission AACS attitude and antenna control system AADEW attack assessment for directed-energy weapon AADR applications approval design review AADS ascent air data system AADSF advanced automated directional solidification furnace AAE abort advisory equipment AAE aerospace auxiliary equipment AAE American Association of Engineers AAFE advanced applications flight equipment AAIR advanced atmospheric sounder and imaging radiometer AAMP advanced architecture microprocessor AAMRAM air-to-air medium-range missile AAO Astronaut Activities Office (JSC) AAP Affirmative Action Plan AAP Affirmative Action Program AAP airlock adapter plate AAP analog autopilot AAP assemble at pad AAS abort advisory system AAS advanced antenna system AASM Association of American Steel Manufacturers AB adapter booster AB afterburner AB air bearing AB airborne AB anchor bolt AB autobeacon AB avionics bay ABA dc amplifier, buffer, and attenuator ABC Ada browse capability ABC automatic brightness control ABCAS algorithm beam center and shape ABCF as-built configuration file ABCL as-built configuration list ABCP airborne command post ABCR as-built configuration record ABD Airborne Ballistics Division (NASA) ABE air-based electronics ABE air-breathing engine ABE arm-based electronics ABERT auto bit error rate test ABES air-breathing engine system ABETS airborne beacon test set ABI avionics bus interface ABJIT algorithm beam jitter ABL airborne laser ABL aircraft-based laser ABLE airborne laser evaluation ABLOS algorithm beam line of sight ABM acquisition bus monitor ABM advance bill of materials ABM antiballistic missile ABM apogee boost motor ABMA Army Ballistic Missile Agency ABMCP airborne military command post ABMO Antiballistic Missile Office ABNCP Airborne National Command Post ABPS air-breathing propulsion system ABRES antiballistic reentry system ABS air-break switch ABS ammonia boiler system (subsystem) ABT air-bearing table ABTCU active baseplate thermal control unit AC advanced composite AC aerodynamic center AC application controller AC assembly complete AC audio center AC auxiliary computer ACA altitude controller assembly ACA annunciator control assembly ACA Associate Contractor Administration ACA attitude controller assembly ACA auxiliary crew compartment ACAP Advanced Computer Airframe Program ACB air-cushion barge ACC advanced carbon-carbon ACC aft cargo compartment ACC automatic control console ACC auxiliary crew compartment ACCE augmented continuous control evaluator ACCESS assembly concept for construction of erectable space ACCN audit central control network ACCS adaptive communication control subsystem ACCU audio central control unit ACD accuracy control document ACD anti-carryover device ACD architectural control document ACDA Arms Control and Disarmament Agency ACDNS attitude control, determination, and navigation ACDS attitude control and determination system (subsystem) ACE acceptance checkout equipment ACE actual average cost per successful mission ACE attitude control electronics ACE automatic checkout equipment ACEL Air Crew Equipment Laboratory (U.S. Navy) ACES acceptance checkout and evaluation system ACES acceptance control equipment section ACES automatic checkout equipment sequencer ACEU aerocontrol electronics unit ACF American Car and Foundry ACI age-controlled item ACI allocated configuration identification ACIL automatic controlled instrument landing ACIP aerodynamic coefficient identification package ACIP aerodynamic coefficient instrumentation package ACL access control list ACL allowable container load ACL ascent closed loop ACLC adaptive communication live controller ACLS automated control and landing system ACM acquisition control module ACM actual average cost per successful mission ACM Association of Computing Machinery ACM auxiliary core memory ACMA Army class managing activity ACMB Applications Configuration Management Board ACME attitude control and maneuvering electronics ACMS automated configuration management system ACN acceptance change notice ACN Ascension Island (STDN) ACO acceptance checkout ACO administrative contracting officer ACO assembly checkout ACP airborne command post ACP astronaut control panel ACP audio control panel ACPL assembly component parts list ACPM associate contractor program manager ACPM attitude control propulsion motor ACPO Associate Contractor Project Office ACPS attitude control propulsion system ACR actual cost report ACRC assured crew return capability ACRES automated change request and evaluation system ACRIM active cavity radiometer irradiance monitor ACRS accelerated cost recovery system ACRS Advisory Committee on Reactor Safeguards ACRV assured crew return vehicle ACS advanced combat system ACS aft crew station ACS alternating current synchronous ACS altitude control and stabilization ACS American Chemical Society ACS atmosphere control system ACS attitude control and stabilization ACS attitude control system ACS automated control system ACSN advance change schedule notice ACSN advance change/study notice ACSU alternating-current switching unit ACT acquisition coarse tracker ACT acquisition, control, and test ACT audio center transmission ACTA activate test article ACTS acquisition coarse tracker subsystem ACTS advanced communication technology satellite ACU annunciator control unit ACU avionics cooling unit ACUO avionics cooling unit operator ACV air-cushion vehicle ACWP actual cost for work performed AD Administrative Operations and Support Service (KSC AD advanced development AD air density AD associate director ADA adaptive diagnostic authoring ADA azimuth drive assembly ADABECS airborne demonstration advanced beam extraction am ADAC attitude determination and control ADACS attitude determination and control system ADADL Ada design and documentation language ADAES advanced data assessment expert system ADAM automated distributed architecture model ADAMS automated dynamic analysis of mechanical systems ADAP aerodynamic data analysis program ADAP automated data analysis program ADB Aerodynamic Data Book ADB auxiliary memory data output bus ADC Aerospace Defense Command ADC Air Defense Command ADC air data computer ADC analog-to-digital computer ADC analog-to-digital converter ADC attitude determination and control ADCN attitude determination, control, and navigation ADCOM air defense command ADCR applicable document contractual record ADCS attitude determinate control system ADCS attitude determination and control subsystem ADD architecture definition document ADF automatic direction finder ADF automatic display finder ADFRF Ames/Dryden Flight Research Facility ADH advanced development hardware ADI analytic and design investigation ADI attitude direction indicator ADI attitude director indicator ADI attitude display indicator ADIC Air Defense Intelligence Center ADL Ada design language ADL Ada-based design language ADL Advanced Development Laboratory ADL Avionics Development Laboratory ADM air data management ADMS automated data management system ADOP advanced distributed on-board processor ADP acceptance data package ADP acceptance documentation package ADP Advanced Development Program (NASA) ADP air data package ADP air data probe ADP automated data processing ADP automatic data processing ADPA air data probe assembly ADPE automated data processing equipment ADPE automatic data processing equipment ADPF automated data processing facility ADPL as-designed parts list ADPS acceptance data package system ADPSSM ADP system security monitor ADR Aerospace and Defense Research ADRL automatic drawing release list ADS air data sensor ADS air data system (subsystem) ADS angular displacement sensor ADS ascent design system ADS attitude determination subsystem ADS attitude display system ADS audio distribution system ADSA alternate demonstration structural article ADSF automatic directional solidification furnace ADT air data transfer ADTA air data transducer assembly ADU annunciator display unit ADU ascent driver unit AE architectural and engineering AEB aft equipment bay AEC aft end cone AEC aft events controller AEC American Engineering Council AEC Atomic Energy Commission AECS area entry control system AECS automated entry control system AED Aerospace Electrical Division (Westinghouse) AED analog event distributor AEDC Arnold Engineering Development Center AEDS analog event distribution system AEM acoustical emission monitoring AEM arsenal exchange model AEM assembly and external maintenance AEOP adaptive electro-optical processor AER Atomic Energy Research AERO Aeroballistics (MSFC) AES advanced electrical schematic AES American Electrochemical Society AES American Electroplaters Society AES analog event system AES atmosphere exchange system AES Auger electron spectroscopy AESOP an easy system of programming AET aerosurface end-to-end test AET algorithm evaluation and test AETB alumina-enhanced thermal barrier AETL approved engineering test laboratory AF aft fuselage AF Air Force AF airframe AF audio frequency AF award fee AF/DBS areal fluid data base system AF/IN Air Force/Intelligence AFA airframe assembly AFA American Foundrymen's Association AFAD armed forces acquisition document AFAL Air Force Astronautics Laboratory AFAL Air Force Avionics Laboratory AFALD Air Force Acquisition Logistics Division (WPAFB) AFAPL Air Force Aero Propulsion Laboratory AFATL Air Force Armaments Test Laboratory AFB Air Force base AFBMA Antifriction Bearing Manufacturing Association AFBMD Air Force Ballistic Missile Division AFC aerodynamic flight control AFC automatic flight control AFC automatic frequency control AFCS automatic flight control system AFCSC Air Force Cryptologic Support Center AFD acceptance for data AFD aft flight deck AFD assistant flight director AFDE aft flight deck equipment AFDO aft flight deck operator AFDR ascent flight design review AFE Aeroassist Flight Experiment AFEB Award Fee Evaluation Board AFEC Award Fee Evaluation Committee AFESD Air Force Electronic Systems Division AFETR Air Force Eastern Test Range AFETRM Air Force Eastern Test Range Manual AFEV Air Force experiment vehicle AFF acceptance and ferry flight AFFDL Air Force Flight Dynamics Laboratory AFFTC Air Force Flight Test Center (EAFB) AFFTC/RPL Air Force Flight Test Center/Rocket Propulsion AFGE American Federation of Government Employees AFGL Air Force Geophysics Laboratory AFGWC Air Force Global Weather Center AFI automatic fault isolation AFLC Air Force Logistics Command AFM Air Force manual AFM arm/firing mechanism AFMDC Air Force Missile Development Center AFML Air Force Materials Laboratory AFMTC Air Force Missile Test Center AFO abort from orbit AFO announced flight opportunity AFOSH Air Force Occupational Safety and Health AFOTEC Air Force Operational Test and Evaluation Center AFP advanced flexible processor AFP Air Force plant AFP Ariane-furnished property AFP888 designation for P80-1 spacecraft AFPC Air Force Program Control AFPD authorization for program development AFPM Air Force program manager AFPR Air Force plant representative AFR Air Force regulation AFRPL Air Force Rocket Propulsion Laboratory (EAFB) AFRSI advanced flexible reusable surface insulation AFS Air Force standard AFS Air Force station AFS ascent flight system AFSA Air Force study and analysis AFSAT Air Force satellite AFSATCOM Air Force satellite communication(s) AFSC Air Force Space Command AFSC Air Force specialty code AFSC Air Force Systems Command AFSCF Air Force Satellite Control Facility AFSCF Air Force Space Command Facility AFSCF Air Force Systems Command Facility AFSCN Air Force satellite control network AFSCN Air Force Space Command network AFSCS Air Force satellite communications system AFSD Air Force Space Division AFSIE Air Force standard items and equipment AFSIG Ascent Flight System Integration Group AFSLV Air Force space launch vehicle AFSPACECOM Air Force Space Command AFSRT avionics flight systems readiness test AFSSD Air Force Space Systems Division AFSTC Air Force Satellite Test Center AFSTC Air Force Space Technology Center AFSTC Air Force Space Technology Command AFSWC Air Force Special Weapons Center (Holloman AFB) AFT active fine tracker AFT aerodynamic flight test AFT atmospheric flight test AFTA acoustic fatigue test article AFTA aft frame tilt actuator AFTEC Air Force Test and Evaluation Center AFTOC Air Force Tactical Operations Center AFTP Air Force test procedure AFTS aft fuselage thrust structure AFWAL Air Force Weapons Analysis Laboratory AFWAL Air Force Wright Aeronautical Laboratory AFWAL/ML Air Force Wright Aeronautical Lals Laboratory AFWL Air Force Weapons Laboratory AFWPAL Air Force Wright-Patterson Aeropropulsion Laboratory AFWSG Air Force Weapons System Group AFWTR Air Force Western Test Range AG artificial gravity AG attitude gyro AGAA attitude gyro accelerometer assembly AGAP attitude gyro accelerometer package AGARD Advisory Group for Aeronautical Research and Development AGC Aerojet General Corporation AGC automatic gain control AGCA automatic ground-controlled approach AGCS automatic ground control station AGCU air/ground cooling unit AGCU attitude gyro coupling unit AGE aerospace ground equipment AGE air/ground equipment AGE automatic ground equipment AGI agreement item AGL above ground level AGL above-ground link AGL absolute ground level AGMA American Gear Manufacturer's Association AGMC Aerospace Guidance and Metrology Center AGN&C advanced guidance, navigation, and control AGO Santiago, Chile (STDN) AGOES advanced geosynchronous observation environment AGOSS automated ground operations scheduling system (KSC) AGREE Advisory Group in Reliability of Electronic Equipment AGS abort guidance system AGS antigravity suit AGS ASPS gimbal system AGT adaptive guidance throttling AH ampere hour AH attitude hold AHCS advanced helicopter control system AHI artificial horizon indicator AHM automatic hold mode AHP analytical hierarchy process AHP pitch axis attitude hold AHR ablative heat rate AHR roll axis attitude hold AHRS attitude heading reference system AHS aft heat shield AI action item AI airspeed indicator AI altimeter indicator AI altitude indicator AI anti-icing AI artificial intelligence AI associate investigator AI/ES artificial intelligence/expert system AIA Aircraft Industries Association AIAA American Institute of Aeronautics and Astronautics AICBM anti-ICBM AICC action item control card AICE American Institute of Chemical Engineers AICP aerodynamic instrumental coefficient package AICS action item closeout sheet AID abbreviated item description AID action item disposition AID analog input differential AID audit item disposition AIDE aerospace installation diagnostic equipment AIDS airborne integrated data system (subsystem) AIEE American Institute of Electrical Engineers AIIM Association for Information and Image Management AIL Avionics Integration Laboratories AILAS automatic instrument landing approach system AILS automatic instrument landing system AIM automatic information management AIME American Institute of Mechanical Engineers AIOD ascent insertion on-orbit deorbit AIP aircraft instrumented payload AIP avionics integration plan AIR action item report AIR adaptive intercommunication requirement AIS action item sheet AIS airborne imaging spectrometer AIS airlock illumination subassembly AIS analog-in single-ended AISC American Institute of Steel Construction AISD Autonetics ICBM Systems Division (Rockwell) AISI American Iron and Steel Institute AIST abbreviated integration system test AIST advanced interferometric system technology AIST Agency of Industrial Science and Technology AISTR advanced interferometric system technology requirement AIT autoignition test AIU abort interface unit AIU avionics interface unit AJ antijamming AJ assembly jig AJCS automated job card system AKA active keel actuator AKM apogee kick motor AL airlock AL approach and landing AL autoland ALAS approach/landing autopilot subsystem ALASAT air-launched antisatellite ALASS alternate low-altitude surveillance system ALB acceptance log book ALC aft load controller ALC air logistics center ALC audio load compensator ALC automatic level control ALC automatic light control ALCA aft load controller assembly ALCA automatic level-control assembly ALCC Airborne Launch Control Center ALCM air-launched cruise missile ALCOA Aluminum Corporation of America ALCOM algorithm line-of-sight comparison ALDC automatic load and drive control ALDO activity-level-dependent operation ALE Airborne Laser Experiment ALE airport lighting equipment ALERT acute launch emergency reliability tip ALERT acute launch emergency restraint tip ALFA air-lubricated free attitude ALFT approach and landing flight test ALGOL algorithmic language ALIO activity-level-independent operation ALL Airborne Laser Laboratory ALMS automated logistics management system ALOSA algorithm line-of-sight angle ALPS advanced liquid propulsion system ALPS approach and landing procedures simulator ALRC Aerojet Liquid Rocket Company ALRUTS automated line replaceable unit tracking system (KSC) ALS Ada language system ALS advanced launch system ALS advanced logistics system ALS airlock system ALS alternative landing site ALS approach/landing system ALS automatic landing system ALSA astronaut life support assembly ALSE astronaut life support equipment ALSEMP ALS Engineering Management Plan ALSGEM ALS global evaluation module ALSS advanced life support system ALSS airlock support system (subsystem) ALSSSWG ALS System Security Working Group ALSSW ALS software ALSYM ALS model ALT approach and landing test ALTR approach and landing test requirement ALTS avionics LRU tracking system ALU arithmetic/logic unit ALV advanced launch vehicle ALV advanced logistics vehicle ALVIB algorithm payload vibration AM actuator mechanism AM Administration and Management Operations (KSC AM aeromedical monitor AM airlock module AM alpha meter AM amplitude modulated AM amplitude modulation AM antenna management AM assurance management AMAL Aeronautical Medical Acceleration Laboratory AMAL Aviation Medical Acceleration Laboratory AMBD automated maintenance data base AMC aft motor controller AMC Air Material Command AMC Army Missile Command AMC automatic manual control AMC automatic mixture control AMCA aft motor controller assembly AMCC ADL master control console AMCM advanced missions cost model AMCR automated master change record AMDCS assurance management document control system AMDS advanced missions docking system (subsystem) AME abort maneuver evaluator AMEC aft master events controller AMEU alpha/Mach indicator electronic unit AMF abort motor facility AMF apogee memory image AMFL Aeromedical Field Laboratory AMG Activation Management Group AMG angle of the middle gimbal AMI airspeed/Mach indicator AMI alpha/Mach indicator AMI apogee memory image AMIC Automated Management Information Center AMIS acquisition management information system AMK aircraft modification kit AML approved materials list AMLC asynchronous multiline controller AMLS advanced manned launch system AMMM autonomous magnetic momentum management AMO Aerospace Medical Operations (JSC) AMOOS advanced maneuvering orbit-to-orbit Shuttle AMOS Air Force Maui optical site AMPD Applied Materials Physics Division AMPR aeronautical manufacturer's planning report AMPR aeronautical manufacturer's progress report AMPS atmosphere, magnetosphere, and plasmas in space AMPS atmospheric magnetospheric plasma system AMPTE active magnetospheric particle tracer explorer AMR area-to-mass ratio AMR Atlantic Missile Range AMRF Automated Manufacturing Research Facility AMRO AMR operations AMRV astronaut maneuvering vehicle AMS acoustic measurement system AMS actuation mechanism subsystem AMS aeronautical material specification AMS amplifier subsystem AMS attached manipulator system AMS automated material system AMS automated measurement system AMSC advanced military space flight capability AMSD Autonetics Marine Systems Division AMST advanced medium STOL transport AMT auxiliary master tape AMTAS automatic modal tuning and analysis system AMTD automatic magnetic tape dissemination AMTF Acoustic Model test Facility AMU astronaut maneuvering unit AMU attitude match update AMW angular momentum wheel AMX AM transmitter-receiver AMY Ada management yield AN alphanumeric AN Army-Navy ANA Air Force-Navy aeronautical bulletin ANARS autonomous navigation and attitude reference system ANC active nutation control ANC Air Force-Navy-civil AND Air Force-Navy aeronautical design standard AND Air Force-Navy design ANI authorized, not implemented ANL automatic noise limiter ANMCC Alternate National Military Command Center ANRA air navigation radio aid ANSI American National Standards Institute ANT Antigua (ETR) ANT Antigua Island ANVIL CAD tool AO acoustic-optical AO analog output AO announcement of opportunity AOA abort once around AOA airborne optical adjunct AOA American Ordnance Association AOA angle of attack AOC annual operating cost AOC auxiliary output chip AOCP ac on-board computer program AOCP AVCS on-board computer program AOCRD acceptance and operational checkout requirements AOCS attitude and orbit control subsystem AOD advanced object data AOD Aircraft Operations Division (JSC) AOD analog output differential AOD assistant operations director AOES advanced orbit ephemeris system AOFEE advanced orbiter flight evaluation experiment AOI area of interest AOIS automatic optical inspection system AOL area of launch AOM acoustic-optic modulator AOP annual operating plan AOP assembly operations plan AOPL advance order parts list AOPM airline operations planning model AOQ average outgoing quality AOQL average outgoing quality limit AOS acquisition of signal AOS ACTS optical system AOS airborne optical system AOSP advanced on-board signal processor AOT actual operating time AOT alignment optical telescope AOT avionics operating time AOT avionics overall test AP accelerometer package AP access panel AP access point AP administrative procedure AP air pressure AP atmospheric and space physics AP autopilot AP Procurement, Supply, and Transportation (KSC AP&P advanced plans and programs APA abort programmer assembly APA allowance for program adjustment APAE attached payload accommodations equipment APAS Aerodynamic Performance and Sizing Program APC adaptive payload carrier APC advanced propulsion comparison APC aft power controller APC airborne particle counter APC armored personnel carrier APC automatic phase control APCA aft power controller assembly APCP Aerojet photoelectric cell program APD area passive dosimeter APD avalanche photo diode APDL Ada programming design language APE arithmetic processing extension APES advanced processor emulator system APGC Air Proving Ground Command API air position indicator APIF automated process information file APIRD authorized procurement information requirements APIRL authorized procurement information requirements list APK accelerometer package APL applications program library APLAC analysis program linear active circuit APLIS automated payload ICD system APLM applications program library maintenance APM ascent particle monitor APM assistant project manager APM associate program manager APMSM assembly phase maintenance simulation model APN ACE problem notice APO automated purchase order APP advance procurement package APP astrophysics payload APPF Automated Payload Processing Facility APPLE advanced propulsion payload effect APPS auxiliary payload power system APR advance parts release APRF Army Pulse Radiation Facility APS aft propulsion system (subsystem) APS ascent propulsion system APS attitude propulsion system (subsystem) APS automated planning system APS automatic processing system APS auxiliary power subsystem APS auxiliary propulsion system APSAP auxiliary propulsion system aft pod APSE Ada programming support environment APSS atmospheric pressure supply subsystem APT airborne pointer tracker APT astronaut preference test APT automatic programmed tool APTE automated production test equipment APTI actions per time interval APU auxiliary power unit APU auxiliary propulsion unit APUS auxiliary power unit subsystem APUT auxiliary power unit test APWL automatically processed wire list AQL acceptance quality level AR acceptance readiness AR acceptance review AR acid resisting AR antireflection AR antireflective AR as required AR atmospheric revitalization ARA attitude reference assembly ARA auxiliary recovery antenna ARABSAT Saudi Arabian communications satellite ARAP Aeronautical Research Associates of Princeton ARAP astronaut rescue air pack ARAR accident risk assessment report ARC aggregation of red blood cells ARC Ames Research Center (NASA, Moffet Field, California) ARC automatic responsivity correction ARCOMSAT Arab League communications satellite ARCS aft reaction control subsystem ARD abort region determinator ARDC Air Research and Development Command (Air Force) ARES advanced railroad electronic system ARFDS automatic reentry flight dynamics simulator ARGMA Army Rocket and Guided Missile Agency ARIA advanced range instrumentation aircraft ARIES astronomical radio interferometric Earth surveying ARINC Aircraft Radio, Incorporated ARIS advanced range instrumentation ship ARIS ALS requirements information system ARMA accumulator-reservoir manifold assembly ARMS automated requirements management system ARN action and reply notice ARN additional reference number ARP as-run procedure ARPA Advanced Research Projects Agency (DOD) ARPCS atmosphere revitalization pressure control system ARPCS atmospheric revitalization pressure control system ARPESH accurate and reliable prototype Earth sensor head ARQ automatic request ARRS air recovery and rescue service ARS Air Rescue Service ARS air revitalization system (subsystem) ARS ALS release system ARS American Rocket Society ARS atmosphere revitalization subsystem ARS atmospheric revitalization section ARS atmospheric revitalization system ARS attitude reference system ARSDA advanced radiation space defense application ART automated reasoning tool ARTCC air route traffic control center ARTO Advanced Radiation Technology Office ARTOOS Advanced Radiation Technology Office optical support ARTS advanced remote tracking station ARTS automated restricted tracking system ARTS automated retrieval and tracking system ARTSE Ada run-time support environment (for embedded systems) ARU attitude reference unit AS antispoof AS&ASD Autonetics Sensors and Aircraft Systems Division AS/CP attitude set/control panel AS/RS automated storage and retrieval system ASA abort sensor assembly ASA adapter service area ASA advanced system avionics ASA aerosurface amplifier ASA aerosurface servoamplifier ASA American Standards Association ASAC aerodynamic surfaces assembly and checkout ASAP ACE Shuttle application processing ASAP advanced sensor analysis program ASAP Aerospace Safety Advisory Panel ASAP as soon as possible ASAPTS automated scheduling and product tracking system ASAS aerodynamic stability augmentation system ASAT antisatellite ASATS antisatellite simulation ASB airlock stowage bag ASC aerodynamic surface control ASC aerosurface control ASC airlock support component ASC American Satellite Corporation ASC array stowage container ASC Ascension Island ASC automatic sensitivity control ASC auxiliary switch normally closed ASCADS aft station command and data system ASCE airlock signal conditioning electronics ASCE American Society of Civil Engineers ASCII American Standard Code for Information Interchange ASCOP Applied Science Corporation of Princeton (Division of EMR) ASCP attitude set control panel ASCS atmosphere storage and control subsystem (Spacelab) ASCS atmospheric storage and control section ASCS attitude stabilization and control system ASD advanced systems development ASD Aeronautical Systems Division (Air Force) ASDE aerosurface driver electronics ASDM aerosurface driver/monitor ASDTIC analog-signal-to-discrete-time-interval converter ASE advanced space engine ASE aerospace support equipment ASE airborne support equipment ASE automatic support equipment ASEA American Society of Engineers and Architects ASED Avionics System Engineering Division (JSC) ASF Atmospheric Science Facility ASFT abbreviated system functional test ASFTS auxiliary system function test stand ASG Aeronautical Standards Group ASG Avionic Subsystems Group ASGPD attitude set and gimbal position display ASI airspeed indicator ASI amended shipping instructions ASI augmented spark igniter ASI augmented spark indicator ASI augmented system ignition ASIC application-specific integrated circuit ASIC application-specific integration circuit ASK amplitude shift keying ASKA automatic system for kinematic analysis ASL above sea level ASL approved source list ASLU antenna select logic unit ASM air-to-surface missile ASM American Society for Metals ASME American Society of Mechanical Engineers ASN average sample number ASO auxiliary switch normally open ASO Aviation Safety Office ASP aerosurface position ASP airborne science program ASPI aerosurface position indicator ASPP atmospheric and space plasma physics ASPR armed service procurement regulation ASPS annular suspension and pointing system ASPSL ASPP Sortie Laboratory ASQC American Society for Quality Control ASR air-sea rescue ASR automatic send and receive ASR avionic system review ASRE American Society of Refrigerating Engineers ASRM abort solid rocket motor ASRM advanced solid rocket motor ASRS automated Shuttle requirement system ASRS automated support requirements system ASSD Autonetics Strategic Systems Division ASSE American Society of Sanitary Engineers ASSESS airborne science Shuttle experiments system simulation ASSH advanced space systems hardening ASSO assistant system security officer ASST American Society for Steel Treating AST all-systems test AST Atlantic standard time ASTB AGN&C simulation test bed ASTD Advanced Space Technology Division ASTE American Society of Tool Engineers ASTF Aeropropulsion System Test Facility ASTG Aerospace Test Group ASTIA Armed Services Technical Information Agency ASTM American Society for Testing Materials ASTP Apollo-Soyuz Test Project ASTRA advanced star tracker ASTRO ascent trajectory optimization ASTS avionic system test specification ASVIB algorithm scoreboard vibrations AT access tower AT action time AT assembly truss AT&L acceptance test and logistics AT&T American Telephone & Telegraph ATA abort time assembly ATA advanced tactical aircraft ATA aft test article ATA Air Transport Association ATA assembly test article ATA avionics test article ATAC Advanced Technology Advisory Committee ATC ablative thrust control ATC active thermal control ATC Air Training Command ATC air traffic control ATC aircraft target computer ATC assistant test conductor ATC ATE computer ATC/FTD Air Training Command/Field Training Detachment ATCA attitude translation control assembly ATCO ambient temperature catalytic oxidizer ATCS active thermal control system (subsystem) ATDAP aircraft target data acquisition program ATDB aerothermal data book ATDB aerothermodynamic data book ATDF automated test development folder ATDP acceptance test data package ATDP aircraft target data program ATDRP aircraft target data reduction program ATE aerospace training equipment ATE airborne test equipment ATE automated test equipment ATE automatic test engineer ATE automatic test equipment ATF advanced tactical fighter ATG Aerospace Test Group ATG automated time line generator ATH above the horizon ATI average total inspection ATIS automatic terminal information system ATL Advanced Technology Laboratories ATL Aero-Thermal Lab (Marquardt) ATL Avionics Test Laboratory ATLAS abbreviated test language for avionic systems ATLAS analysis of thrust structure loads and stresses ATM Apollo telescope mount ATM ascent trajectory model ATO abort to orbit ATO automatic turn-on ATOLL acceptance test of launch language ATOP Ada technology operational planning ATOS automated technical order system ATP acceptance test procedure ATP acceptance test program ATP acquisition, tracking, and pointing ATP activation test program ATP advanced technical payroll ATP airborne tracking and pointing ATP authority to proceed ATP-FC acquisition, tracking, and pointing fire control ATPA alpha temperature probe assembly ATPG automatic test program generator ATPSE acquisition, tracking, and pointing system emulator ATR air transport rack ATR air transport radio ATR air transport rating ATR air transportation rack ATRS automated training records system ATS acceptance test specification ATS Atlantic tracking station ATS automatic terminal system ATS automatic test set ATS automatic transcribing system ATS administrative telephone system ATS administrative terminal system ATS advanced technology satellite ATS analog tone signal ATS applications technology satellite ATS assembly trusses and structure ATS asynchronous task storage ATS Atlantic tracking ship ATT acceptance thermal testing ATTACK advanced threat technology attack coordination and ATTS automatic telemetry tracking system ATU audio terminal unit ATU audio/thermal unit ATVC ascent thrust vector control (controller) ATVC automatic thrust vector control ATVCD ascent thrust vector control driver ATVCS automatic thrust vector control system AU accounting unit AU astronomical unit AUASAM automatic aimpoint selection and maintenance AUB aft utility bridge AUC average unit cost AUCV advanced unmanned cargo vehicle AUDF automated unit development folder AUF authorized user file AUP Ames unitary plan (wind tunnel) AUTO-BF automatic body flap AUTO-P automatic pitch control mode AUTO-YR automatic yaw roll mode AUTODIN automatic digital network AUTOVON automatic voice network AV audiovisual AV average value AVC automatic volume control AVCG automatic vapor crystal growth AVCOR algorithm vibration correlation AVCS attitude and velocity control system (subsystem) AVD air vehicle detection AVE aerospace vehicle equipment AVE airborne vehicle equipment AVE atmospheric variability experiment AVE automatic volume expansion AVE Avenal (TACAN station) AVID automated verification information data base AVL address validity AVL Avionics Verification Laboratory AVLSI advanced, very large scale integration AVO avoid verbal orders AVRCS attitude, velocity, reaction control system AVREL availability and reliability program AVSM auxiliary video switch matrix AVT acceptance vibration testing AVVEU altitude/vertical velocity indicator electronic unit AVVI altitude/vertical velocity indicator AW airlock wall AW assembly workstand AWAA attack warning and attack assessment AWACS advanced warning and control system AWCS agency-wide coding structure AWG Activation Working Group AWG American wire gauge AWI accommodation weight investigation AWL augmented wire list AWL automated wire list AWPV automated weld process verification AWS advance warning system AWS air weather service AWS American Welding Society AWS automated wiring system AXAF Advanced X-ray Astrophysics Facility AZEL azimuth and elevation Ada DOD high-level programming language Adc amperes direct current Al-Li aluminum lithium B&P budgetary and planning B-L bill of lading B/A barometric B/A boost/abort B/A buffer amplifier B/C bench check B/L baseline B/M bench maintenance B/O booster/orbiter B/O breakout B/O burnout B/P blood pressure B/SC brake/skid control B/V bleed valve BA bank angle BA breathing air BAC Boeing Aerospace Company BAC Boeing Aircraft Company BAC booster assembly contractor BAC budget at completion BAC buffer access card BACS body axis coordinate system BAF Barnes absorption filter BAFO best and final offer BAI barometric altitude indicator BAIR breathing air BAN budget allocation notice BAROC baroset correction BARS baseline accounting and reporting system BAS breathing air system BASD Ball Aerospace Systems Division BASS backup avionics system software BATE base activation test equipment BATES battlefield artillery tactical engagement system BATSE Burst and Transient Source Experiment BAU business as usual BB baseband BB brassboard BB breadboard BBC before-business clearance BBN Bolt, Beranek, and Newman BBS DEC all-in-one bulletin board system BBXRT broadband X-ray telescope BC base construction BC broadcast BC bus coupler BC baseline configuration BC battery charge BC battery conditioner BC bell cord BC beta cloth BC between centers BC binary counter BC bolt center BCC beacon control console BCCT break control command transducer BCD baseline concept definition BCD baseline configuration document BCD binary-coded data BCD budget change document BCE backup control electronics BCE burn control element BCE bus control element BCH base Chaudhuri-Hocquenghen BCH binary-coded hexadecimal BCI baseline configuration identification BCID baseline candidate item data base BCLS base cardiac life support BCO booster cutoff BCP base condemnation percent BCP benchmark control point BCR bar chart report BCR budget change request BCRD basic consolidated requirements document BCRT binary code range time BCS beam control system BCT bus configuration table BCU battery control unit BCU bus control unit BCWP budget costs for work performed BCWS budgeted cost for work scheduled BD binary decoder BD binary digit BD binary discrete BDA backup drive amplifier BDA Bermuda Island (STDN) BDCR baseline document change request BDD baseline definition document BDD burst detection dosimeter (IGS) BDD burst detector dosimeter BDI budget data and integration BDP burst detection processor (IGS) BDP burst detector processor BDS-2 booster phase detection system BDT block data transfer BDW burst detector EMP sensor BDW EMP sensor BDX burst detection X-ray sensor BDX burst detector X-ray sensor BDY burst detector optical sensor BE beam expander BE bell end BEAF beam expander alignment function BEC backup event controller BECO booster engine cutoff BER bit error rate BESS biomedical experiment scientific satellite BESS biomedical experiment support satellite BEST booster exhaust study test BET best-estimate trajectory BET best estimate of trajectory BETA ballistic exploitation and target acquisition BF back feed BF beat frequency BF body flap BFC backup flight control (controller) BFC body flap control BFCS backup flight control system BFEC Bendix Field Engineering Corporation BFL back focal length BFL Bakersfield (TACAN station) BFN beam-forming feed network BFO beat frequency oscillator BFP buyer-furnished part BFRP boron fiber-reinforced plastic BFR BFS backup flight software BFS backup flight system BFSPLP BFS payload preprocessor BFSS backup flight software system BG back gear BH/MP breather hose/mouthpiece BHN Brinell hardness number BHP brake horsepower BHS base heat shield BI background information BIA booster insertion and abort BIA bus interface adapter BIB blocked impurity band BIBIB back-illuminated blocked impurity band BIC bus interface controller BILBO built-in logic block observer BIS biocide injection system BISC biomedical instrumentation, scientific and crew BIT built-in test BITE built-in test equipment BITS budget impact tracking system BIU buffer interface unit BIU bus interface unit BJR blockhouse junction rack BKNO3 boron-potassium nitrate BLOW booster lift-off weight BLPG buried long-period grating BLS bottom left side BLV bleed valve BM ballistic missile BM battle management BM bench maintenance BM body-mounted BM branch manager BM business manager BM-TW/AA ballistic missile tactical warning/attack BM/C3 battle management and command, control, and BMA body-mounted accelerometer BMAG body-mounted attitude gyro BMAP buffer map BMAS body-mounted accelerometer system BMB base maintenance building BMB bench maintenance building BMC3 battle management communications (three types) BMD ballistic missile defense BMDATC Ballistic Missile Defense Advanced Technology Center BMDSCOM Ballistic Missile Defense Systems Command BME bench maintenance equipment BMEWS ballistic missile early warning system BMFT German D-1 Spacelab payload BMI Battelle Memorial Institute BMMD body-mass measuring device BMO Ballistic Missile Office BMO ballistic missile organization BMS background measurement satellite BMS battle management simulation BMTS bench maintenance test set BMU bus monitor unit BMVU ballistic missile view BN ballistic number BN bullnose BNS bomb navigation system BO beating oscillator BOA broad ocean area BOC Base Operations Contract (contractor) BOC blowout coil BOD beneficial occupancy date BOD bright-object detector BOE break of entry BOF beginning of file BOI break of integrity BOL beginning of life BOM beginning of month BOM bill of material BOP baseline operations plan BOP basic overall polarity BOPACE Boeing plastic analysis capability for engines BOS backup operating system BOS bright-object sensor BOSO ballistic orbital support operations BOT beginning of tape BOW bill of work BP back pressure BP budgetary and planning BP buttock plane BP bandpass BP barber pole BP base plate BP bid and proposal BP blood pressure BP blueprint BP boilerplate BP boiling point BPC backpressure control BPC boost protective cover BPD baseline program document BPD baseline program documentation BPI boost phase intercept BPMS blood pressure measuring system BPO blanket purchase order BPR bimonthly progress report BPR bypass ratio BPS boost propulsion system BPSK biphase shift key BPSK biphase shift keying BPT body point BPV bipropellant valve BR bit rate BRAVO business risk and value of operation in space BRCS basic reference coordinate system BRDF bidirectional reflectance distribution function BRF band rejection filter BRIL budget receipt/issuance log BRL Ballistic Research Laboratory BRM baseline reference mission BRM biological research module BRRS Banana River Repeater Station BRS bottom right side BS backup subsystem BS beam splitter BS block specification BSA battery bus solar array BSA bus status/alternate bus table BSC brake skid controller BSD Ballistic Systems Division BSDP booster-stage discharge pressure BSE booster systems engineer BSEE Bachelor of Science degree in electrical engineering BSGE Bachelor of Science degree in general engineering BSI basic shipping instruction BSI Boeing Services International BSI booster situation indicator BSM beam-steering mechanism BSM booster separation motor BSME Bachelor of Science degree in mechanical engineering BSP business system planning BSR basic system release BSR BITE status register BSRM booster solid rocket motor BSS backup system services BSTS boost surveillance and tracking system BSTS boost surveillance tracking system BSW BFS software BT burn time (engine) BTC binary time code BTC bus tie contractor BTE bench test equipment BTH below the horizon BTMS body temperature measuring system BTR burn time remaining BTR bus transfer BTU bus terminal unit BU&C/O buildup and checkout BUAER Bureau of Aeronautics (Navy) BUC backup computer BUC Buckhorn (GSTDN) BUFC backup flight controller BUIC backup interceptor control BUN BITE update notice BUORD Bureau of Ordnance (Navy) BUOU backup optical unit BUR backup rate BUSGEN Bussin generator BUSHIPS Bureau of Ships BV balanced voltage BV boost vehicle BV booster vehicle BVC boost voltage converter BW bandwidth BW beam width BW bridge wire BWG Birmingham wire gauge BWO backward wave oscillator Btu British thermal unit C candle C core (metal) C cosine C cycle C hundred C capacitance C cathode C Celsius C center C centigrade C coefficient C complete C constant C&C command and control C&C communication and control C&CS command and control subsystem C&D communication and data C&D controls and displays C&DH command and data handling C&DP control and data processor C&DS command and data simulator C&DSS communication and data subsystem C&I communication and instrumentation C&M control and monitoring C&P contracts and pricing C&T communication and tracking C&TS communications and tracking system C&TSS communication and tracking subsystem C&W caution and warning C-BARS classified baseline accounting and reporting system C-C carbon-carbon C-C center-to-center C-DEL complete delivery C-RFE C-band RF electronics C-to-C computer-to-computer C/A coarse acquisition (navigation signal) C/A code standard positioning service C/B circuit breaker C/C combustion chamber C/D countdown C/DPM cost/design performance management C/F center frequency C/O changeout C/O checkout C/O contamination/overpressure C/O cutoff C/P cold plate C/R commutation rate C/S cost/schedule C/S/P cost/schedule/performance C/SC cost/schedule control C/SCS cost/schedule control system C/SCSC cost and schedule control system criteria C/SCSC cost/schedule control systems criteria C/SR cost/schedule report C/SSR cost/schedule status report C/T control and timing C/W carrier wave C/W caution and warning C2 command and control C2I command, control, and intelligence C2S command and control subsystem C3 command, control, and communications C3I command, control, communications, and intelligence CA carrier aircraft CA completion of assembly CA cone angle CA contract advice CA contract award CA corrective action CA cost account CA critical analysis CAA Civil Aeronautics Administration CAA composite audio amplifier CAA cost account authorization CAALIS computer-aided assembly-line inspection system CAAT computer-aided assembly tool CAB Civil Aeronautics Board CAB Civil Aviation Board CAB computer address bus CAB Corrective Action Board CAB Cost Audit Board CACB center aisle connector bracket CACC communications and configuration console CAD computer-aided design CAD-OPS computer-aided design costing for operations CADAM computer graphics augmented design and manufacturing CADDS computer-aided design and drafting system CADE controller/attitude direct electronics CADFISS computation and data flow integrated subsystem CADS command and data simulator CADS computer-aided design system CADSI communication and data systems integration CADU control and display unit CAE computer-aided engineering CAE corrective action engineer CAFB Chanute Air Force Base CAI computer-aided instruction CAIT computer-aided instruction terminal CAIT computer-aided instruction trainer CAL canister airlock CAL computer-aided logistics CAL contract advice letter CAL Cornell Aeronautical Laboratory CALS computer-aided acquisition and logistics support CALS computer-aided logistics system CALST Cornell Aeronautical Laboratory Shock Tunnel CAM carrier aircraft modification CAM Civil Aeronautics Manual CAM computer annunciation matrix CAM computer-aided manufacturing CAM content-addressable memory CAM cost account manager CAMERA control and monitoring equipment resource allocation CAMP common Ada missile package CAMP computer-aided message processing CAN certification analysis network CAO Cost Administration Office CAP capability assurance program CAP computer application program CAP contractor-acquired property CAP cost account package CAP cost account plan CAP crew activity plan CAPRI capacitance rate integrator CAPS common attitude pointing system CAPS crew activity planning system CAPS crew altitude protection suit CAPS crew altitude protection system CAPSS computer-aided planning and scheduling system CAR certification analysis requirements CAR certification approval request CAR configuration and acceptance review CAR contractual action request CAR corrective action record CAR corrective action report CAR corrective action request CAR customer acceptance review CARB Central Acquisition Review Board CARDE Canadian Armament Research and Development Establishment CARID customer acceptance report item disposition CARID customer acceptance review item disposition CARM customer accommodation requirement model CARR customer acceptance readiness review CARR customer accommodation requirement representative CARS configuration accounting and reporting system CAS calibrated airspeed CAS CITE augmentation system CAS command augmentation system CAS computer airspeed CAS configuration accounting system CAS cooperative application satellite CAS cost accounting standard CAS crew accommodation system CAS-P CAS pitch control mode CAS-YR CAS yaw roll control mode CASB Cost Accounting Standards Board CASE care application service element CASE computer-aided system engineering CASE computer-automated software engineering CASES control and structures experiments for space CASO cancellation addendum sales order CASP change assessment summary package CASR cost and schedule reporting system CASS CITE augmentation support system CASS consolidated automated support system CAT computer-aided test CAT control attenuator timer CAT-2 communications and tracking comprehensive analysis tool CATS change action tracking system CATS correspondence action tracking system CAU command acquisition unit CAU command activation unit CAU customer acquisition unit CAWG Customer Accommodation Working Group CB center of buoyancy CB circuit breaker CB coax (or coaxial) interface bracket CB control board CBA C-band transponder antenna CBA collective bargaining agreement CBARS classified baseline accounting and reporting system CBB contract budget baseline CBC change board commitment CBC complete blood count CBE connector bracket experiment CBIL common and bulk items list CMB Common Berthing Mechanism CBO Congressional Budget Office CBP connector bracket power CBR California bearing ratio CBS connector bracket signal CBSA cargo bay stowage assembly CBT computer-based training CBV cabin bleed valve CBW constant bandwidth CBX C-band transponder CBrF3 bromotrifluoromethane (fire-extinguishing material) CC carbon-carbon CC contract completion CC control center CC corner cube CC cost center CC crew certified CC crew compartment CC channel controller CC closing coil CC color code CC commercial control CC communications control CC compatibility change CC computer center CC contamination control CCA communications carrier assembly CCA contract change authority CCA contract change authorization CCAFS Cape Canaveral Air Force Station CCATS command communications and telemetry system CCB Change Control Board CCB Configuration Control Board CCBD Configuration Control Board directive CCBD Control Change Board directive CCC central computer complex CCC command control console CCC communication control center CCC complex control center CCC computer checkout console CCC Consolidated Controls Corporation CCC contaminant control cartridge CCC controller checkout console CCC coordinate conversion computer CCCD crew compartment configuration drawing CCD central command decoder CCD charge-coupled device CCD checkout command decoder CCD constants change display CCDEV Commercial Crew DEVelopment CCDR contractor critical design review CCE computer command engineer CCE continuous control evaluator CCF central computer facility CCF converter compressor facility CCFF Cape Canaveral Forecast Facility CCFT controlled current feedback transformer CCHS crew compartment heat shield CCiCap Commercial Crew Integrated CAPability CCIM command computer input multiplexer CCIR International Radio Consultative Committee CCL closed-circuit loop CCL commonality candidate list CCL critical characteristics list CCM controlled carrier modulation CCM counter-countermeasure CCM crew/cargo module CCME contract change mass estimate CCMS checkout, control, and monitor subsystem (LPS) CCMS command, control, and monitor system CCMTA Cape Canaveral Missile Test Annex CCN contract change negotiation CCN contract change notice CCN contract change notification CCO contract change order CCO current-controlled oscillator CCO customer contracting officer CCOH corrosive contaminants, oxygen, and humidity CCP center console panel CCP contamination control plan CCP contract change proposal CCP controlled components program CCP corrosion control plan CCP cost control program CCP Change Control Panel CCP change control package CCP commercial change proposal CCP computer control panel CCP configuration change point CCP Configuration Control Panel CCP configuration control phase CCP configuration control point CCPDSR common center processing and display system replacement CCPDSR communications center processing and display system CCR cargo compatibility review CCR configuration control record CCR contract change record CCR contract change request CCR contractor change review CCR control center rack CCRA Cape Canaveral reference atmosphere CCRF consolidated communication recording facility CCS central computer and sequencer CCS central control section CCS central control station CCS command and communication system CCS complex control set CCS computer core segment CCS console communication system CCS contamination control system CCS contract control system CCSD Chrysler Corporation Space Division CCSD Collins Communications Systems Division CCSDS Consultative Committee for Space Data Systems CCSR carbon-carbon survivable radiator CCSR crew compartment stowage review CCT command/control transmitter CCT computer-compatible tape CCTCF communication circuit technical control facility CCTV closed-circuit television CCU camera control unit CCU central control unit CCU communications carrier umbilical CCU communications carrier unit CCU coupling control unit CCU crew communications unit CCU crew compartment umbilical CCU crewman communications umbilical CCV chamber coolant valve CCVA chamber coolant valve actuator CCW counterclockwise CCZ command and control zone CD call director CD candela (luminous intensity) CD coefficient of drag CD coin dimple CD cold-drawn CD command decoder MDM CD components demonstration CD countdown CD current density CD&SC Communications, Distribution, and Switching Center CD/V concept definition and validation CDA command and data acquisition CDA critical design audit CDAS configuration design analysis simulation CDAS configuration development analysis and simulation CDAS configurations development analysis simulation CDAS core design analysis simulation CDB central data buffer CDB command data base CDB computer data bus CDBFR common data buffer CDC classified document control CDC Collins Defense Communications CDC command and data handling console CDC Computer Development Center (NASA) CDC confined detonating cord CDC Control Data Corporation CDC countdown clock CDCD cargo design control drawing CDCD Collins Defense Communications Division CDCM coupling display, manual control IMU CDCO coupling display, manual control optics CDD command decoding and distribution CDD common data dictionary CDDB common diagnostic data base CDDT countdown demonstration test CDF cable distribution frame CDF central data facility CDF circuit design fabrication CDF combined data file CDF confined detonating fuse CDF cool-down facility CDF&TDS circuit design, fabrication, and test data CDG Concept Development Group CDH constant delta height CDH constant differential height CDI contract definition instruction CDI course deviation indicator CDID contract data item description CDM communications data manager CDM configuration design module CDMA code division multiple access CDMS command and data management system (subsystem) CDMS contractor data management system (VAFB) CDN CDR discrepancy notice CDNR CDR discrepancy notice record CDOM chief draftsman office memorandum CDP command data processor CDP computational data processing CDP computer data processing CDP confidence development program CDP critical design parameter CDPA classified data preparation area CDPIS command data processing and instrumentation system CDQ certificate of qualification CDQR critical design and qualification review CDR cleaning, decontamination request CDR command destruct receiver CDR conceptual design review CDR configuration design review CDR contract data requirements CDR critical design review CDRL contract data requirements list CDRR contract documentation requirements record CDRS contract data requirements schedule CDS cavity digitizing system CDS control and display system CDS control data system CDS controller select direction CDS coupling display system CDS central data subsystem (LPS) CDS central data system CDS closeout door system CDS cold-drawn steel CDS computer design and simulation CDS configuration design system CDS configuration development system CDS consolidated direct support CDSC Communication Distribution and Switching Center CDSC coupling-display scanning-telescope manual control CDSF commercially developed space facility CDSL Computer Data System Laboratory CDSR contract data status report CDSR cost data summary report CDT central daylight time CDT command descriptor table CDT compressed data tape CDT configuration data table CDT countdown time CDU computer display unit CDU coupling data unit CDU coupling display unit CDU CRT display unit CDUM coupling display unit IMU CDUO coupling display unit optics CDW command data word CDW computer data word CDW control data word CE cargo element CE change engineer CE change evaluation CE civil engineering CE control element CE Corps of Engineers CE cost element CE crew equipment CE current expendable CE/CK computer entry/control keyboard CEA circular error average CEA Computer Engineering Associates CEA control electronics assembly CEC Civil Engineering Corps CEC Consolidated Electrodynamics Corporation CEC Consolidated Electronics Corporation CEC control electronics container CEC control encoder coupler CECP compatibility engineering change proposal CEDC cyclic error detection code CEEP composite entry evaluation program CEF comsec equipment facility CEI configuration end item CEI contract end item CEIAC Coastal Engineering Information Analysis Center CEIS combined elements and integrated systems CEIS contract end item specification CEIT cargo equipment integrated test CEIT crew equipment integration test CEIT crew equipment interface test CELSS controlled ecological life support system CELV commercial expendable launch vehicle CEM cost estimating method CEMF counterelectromotive force CEO chief engineer's office CEO chief executive officer CEP circle of equal probability CEP circular error probability CEP circular error probable CEP comsec equipment program CEP configuration evaluation plan CEPS CITS expert parameter system CEQ Council on Environmental Quality CER cost estimating relationship CES combined Earth sensor CES concept evaluation study CES conical Earth sensor CES control electronics section CES crew escape system CESA Canadian Engineering Standards Association CET clutter equivalent target CET combined element test CETA crew and equipment translation aid CETF Critical Evaluation Task Force CEU control electronics unit CF carrier frequency CF center forward CF center of flotation CF centrifugal force CF completion form CF consequence of failure CF corner fitting CFAE contractor-furnished airborne equipment CFAR constant false alarm rate CFC central fire control CFC chlorofluorocarbon CFD computational fluid dynamics CFD converter frequency to dc voltage CFD cumulative frequency distribution CFE central framework executive CFE consolidated front end CFE contractor-furnished equipment CFE critical function equipment CFE customer-furnished equipment CFES continuous flow electrophoresis system CFI card format identifier CFM customer-furnished material CFP conceptual flight profile CFR Code of Federal Regulations CFRP carbon-fiber-reinforced plastic CFSD critical-function sequence diagram CFSR contract fund status report CFSR contract funds status review CFSTI Clearinghouse for Scientific and Technical Information CFT cross-functional team CFY company fiscal year CGAD Collins General Aviation Division CGAU cabin gas analysis unit CGC command guidance computer CGF command generation function CGL comprehensive general liability CGP central grounding point CGSS cryogenic gas storage system CH case hardening CH control house CH/SL certified hardware/software list CH4 methane CHARM composite high-altitude radiation model CHI computer-to-human interface CHIP College Hire Indoctrination Program CHL certified hardware list CHR Cooper-Harper rating CHROMEX chromosome and plant cell division in space CHSF cargo hydrazine service facility CHW command header word CHX cabin heat exchanger CHX condensing heat exchanger CI cast iron CI crew interface CI center of impact CI certification inspection CI color interior film CI configuration inspection CI configuration item CI continuous interlock CI contract initiation CI course invalid CIA Central Intelligence Agency CIA configuration identification accounting CIA control interface assembly CIA controller interface assembly CIAP climatic impact assessment program CIB Change Impact Board CIB Change Implementation Board CIB control interface block CIC cargo integration contractor CIC command interface control CIC control and information center CIC critical item consolidation CICC cargo integration control center CICCR configuration information control center requirement CICU communication interface control unit CICU computer interface conditioning unit CID cable interconnect diagram CID charge injection device CID computer interface device CIDL configuration item data list CIDR critical intermediate design review CIDSC contractor in-house data support capability CIE cargo integration equipment CIE communications interface equipment CIF Central Information Facility (AMR) CIF central instrumentation facility CIG Cable Integrity Group CIG Communications and Interface Group CIG compound interlace grating CIG Connector Integration Group CIG Connector Integrity Group CII change installation instruction CII configuration item identifier CIJB cradle interface junction box CIL critical items list CIM computer input multiplexer CIM computer-integrated manufacturing CIMS consolidated information management system CIN center information network CIN change identification number CIN change identifier number CINC commander-in-chief CINCAD commander-in-chief, Air Defense CINCNET commander-in-chief network CINCNORAD commander-in-chief, North American Aerospace CINCSAC commander-in-chief, Strategic Air Command CINCSBL commander-in-chief, Space-Based Laser CIP cast-iron pipe CIP change implementation plan CIP Class 1 Integration Plan CIP communications interface processor CIP control and interface panel CIR cargo integration review CIR configuration inspection report CIR critical item report CIRD cargo integration review dry run CIRHS critical items and residual hazards list CIRM celestial infrared mapping CIRM celestial infrared measurements CIRRIS cryogenic infrared radiance instrumentation for Shuttle CIS cargo integration schedule CIS central integration site CIS change impact summary CIS communication interface system CIS contractor's information submittal CISS Centaur integrated support structure CIT California Institute of Technology CIT CAP initialization tape CIT critical item tag CITE cargo integration test equipment CITS central integrated test system CIU communication interface unit CIU computer interface unit CIU controller interface unit CIVT cargo interface verification test CIVU cargo integration verification unit CIWG Cargo Integration Working Group CKRA Cape Kennedy reference atmosphere CL centerline CL closed loop CL coefficient of lift CL confidence level CLAES cryogenic limb array etalon spectrometer CLAS computerized loads analysis system CLC change letter control CLC Computer Liaison Committee CLF Clear Lake facility CLF controller, load forward CLIN contract line item number CLIP combined laser instrumentation package CLIPS C-language inferencing for production systems CLM care logic module CLM circumlunar mission CLMC central logistics management center CLOT combined loads orbiter test CLOUDSAT cloud cover statistical analysis program CLRB Cost Limit Review Board CLS contingency landing site CLSO contingency landing support officer CM cargo manager CM control monitor CM countermeasure CM crew module CM center of mass CM change management CM circular mil CM command module CM configuration management CM configuration monitor CM consumable management CM control mode CM&S communications maintenance and storage CMA configuration management accounting CMACS central monitor and control system CMAG cruise missile advanced guidance CMAO contract management assistance officer CMAR configuration management action request CMAT compatible material CMB Configuration Management Board CMC central maintenance computer CMC command module computer CMC crew module computer CMCS centralized maintenance computer system CMD controller, main display CMDB configuration management data base CMDM control multiplexer/demultiplexer CMDS configuration management data system CME commercial measuring equipment CMF controller, motor, forward CMG control moment gyro CMIF common module integration facility CMIS common module integration simulator CMIS computer management information system CMIS configuration management information system CMIS control monitor isolation subsystem CML commands and measurement list CMM CM Manual CMM condition-monitored maintenance CMM controller, motor, midbody CMM coordinate measurement machine CMN contract master network CMO class mix option CMO Configuration Management Office CMOS complementary metal oxide semiconductor CMOS/SOS complementary metal oxide semiconductor/silicon CMP Configuration Management Panel CMP configuration management plan CMPP configuration management program plan CMR center materials representative CMR common mode rejection CMR configuration management representative CMR contractor management review CMRB Contractor Material Review Board CMRP configuration management requirements plan CMRR common mode rejection ratio CMRS configuration management requirements standard CMS change management system CMS code management system CMS component mode synthesis CMS configuration management system CMS contract master schedule CMS conventional monitoring system CMS-2 Cambridge Monitoring System (IBM computer program) CMSI command monitor system interface CMT critical military target CMTS computerized maintenance test system CMU control and monitor unit CMV common mode voltage CMVAS configuration management verification accounting system CMW compartmented mode work station CN change notice CNC computer numerical control CNC computer numerically controlled CND cannot duplicate CNES Centre National D'Etudes Spatiales (French National Space Studies Center) CNRL Communications and Navigation Research Laboratory CNWDI critical nuclear weapons design information CO carbon monoxide CO Cargo Operations (KSC directorate) CO change order CO contracting officer CO*A cesium-dideuterium-arsenate CO2 carbon dioxide COA center operations area COAS crewman optical alignment sight COB communications office building COBE Cosmic Background Explorer COBOL common business-oriented language COC certificate of completion COC close-open-close COCOMO constructive cost model COD Center Operations Directorate (JSC) COD crack opening displacement COF construction of facilities COF cost of facilities COFAC construction facility COFI checkout and fault isolation COFR certificate of flight readiness COFR certification of flight readiness COFW certificate of flight worthiness COGMAN center of gravity of payload manifest COI conflict of interest COIL chemical oxygen-iodine laser COIM checkout interpreter (software) module COL checkout language COLA cost-of-living adjustment COM computer output microfiche COM computer output microfilm COM-M common mode COMAS combined orbital maneuvering and abort system COMAT compatibility of materials COMP computation of rendezvous targeting COMPOOL common data pool COMPSIM concept mission performance simulation COMSAT communications satellite CONAD CONUS defense CONUS continental United States COP central operations program COP co-orbiting platform COP coefficients of performance COP combined operations plan COP contingency operations plan COQ certificate of qualification COR contracting officer representative COR contractor.s operations review CORA coherent optical radar amplifier CORE common operational research equipment COS carry-on oxygen system COS checkout station COS console operating system COSATI Committee on Scientific and Technical Information COSI closeout system installation COSM checkout servicing and maintenance COSMIC Computer Software Management and Information Center COSPAC cost/schedule planning and control COSTA cost accounting (code) COT critical optical technology COTR contracting officer's technical representative COTS commercial off the shelf COTS Commercial Orbital Transportation System COV cutoff value CP candlepower CP computer program CP console processor CP control panel CP control point CP coordinated procurement CP Cargo Projects Office (KSC) CP center of pressure CP checkpoint CP chemically pure CP circular pitch CP cold plate CP cold-punched CP communication processor CP-PCO Cargo Projects Program Control Office CPA change proposal analyst CPA contingency planning aid CPA critical path analysis CPAF cost plus award fee CPAR controlled parts approval CPC Cargo Processing Contract (contractor) CPC central planning center CPC characteristic properties code CPC computer program component CPC control pressure conditioner CPCB Crew Procedures Control Board CPCEI computer program contract end item CPCI computer program change instruction CPCI computer program configuration item CPCR computer program change request CPCR crew procedure change request (Form 482) CPD Crew Procedures Division CPD crew passive dosimeter CPDDS computer program detail design specification CPDP computer program development plan CPDP computer program development program CPDR contractor's preliminary design review CPDS computer program design specification CPDS computer program detailed specification CPDS computer program development specification CPDS crew procedures documentation system CPE chief program engineer CPE chief project engineer CPEI computer program end item CPES crew procedures evaluator simulator CPF cargo processing facility CPF central processing facility CPF controller, power, forward CPF cost per flight CPFF cost plus fixed fee CPFF/IF cost plus fixed fee/incentive fee CPG Change Planning Group CPG coarse-pointing gimbal CPI consumer price index CPI crosspointer indicator CPIC Computer Program Integration Contract (contractor) CPIF cost plus incentive fee CPIF/AF cost plus incentive fee/award fee CPM cargo propulsion module CPM cell performance monitor CPM change proposal manager CPM computer program module CPM cost and performance measurement CPM critical path method CPMP crew procedures management plan CPMP crew products management plan CPO Central Planning Office (MSFC) CPPS computer program product specification CPR cost performance report CPR critical problem report CPS coarse pointing system CPS critical path schedule CPSD cross-power spectral density CPSE common payload support equipment CPSR contractor's procurement system review CPSS cold plate support structure CPSS critical phase system software CPT cargo processing technician CPT computer program tape CPTA core propulsion test article CPU central processing unit CPU command processor unit CPU computer printer unit CPU computer processing unit CPV common pressure vessel CQDR critical qualification design review CQIM configuration and quality information management CR card reader CR contractor's response CR control room CR customer's request CR cathode ray CR certification request CR certification requirement CR change record CR change request CR cold-rolled CR communication and radar CR configuration review CRALT CNES radar altimeter CRAS cost reduction alternative study CRB Change Review Board CRB Concept Review Board CRB Configuration Review Board CRB Correspondence Review Board CRC contractor-recommended code CRC cost reduction curve CRC cyclic redundancy check CRD change request disposition CRD cost reporting document CRDP certification review data package CRDP computer resource development plan CRERS crew rescue and equipment retrieval system CRES corrosion resistance steel CRG Change Review Group CRG Correspondence Review Group CRI certification requirements index CRIS calibration recall and information system CRIS connector removal and installation sheet CRISD computer resource integration support document CRISD computer resources integrated support document CRISP computer resources integrated support plan CRN cable routing notation CRN change review notice CRN contract revision number CRO cathode-ray oscilloscope CRP configuration requirements processing CRPL Cosmic Ray Physics Laboratory CRR cargo compatibility review CRR cargo readiness review CRR computer run report CRR critical requirements review CRRES combined release and radiation effects satellite CRS cold-rolled steel CRS computer resources support CRS Congressional Research Service CRS crew rescue system CRSI ceramic reusable surface insulation CRT cathode-ray tube CRT computer response time CRTU cryogenic radiator test unit CRW control read/write CS carbon steel CS control segment CS core segment CS crew simulator CS crew station CS cross-strapping CS current sensor CS Spacelab Operations Directorate CS cast steel CS center section CS change status CS checkout station CS common set CS communications system (subsystem) CS consumables status CS contractor share of variance from target cost CSA contract specification amendment CSA contractor support area CSA cyclic strain attenuator CSAM crinkled, single aluminized Mylar CSAP Control System Analysis Program CSAT combined systems acceptance test CSB Change Schedule Board CSB closely spaced basing CSB complex support building CSC Computer Sciences Corporation CSC computer software component CSC computer software configuration CSC conical-shaped charge CSC contingency support center (CCAFS) CSC cosecant computing amplifier CSC cost, schedule, and control CSCB contractor's summary cost breakdown CSCD control system command decoder CSCI computer software configuration item CSCI configuration software computer item CSCS central security control system CSCS contingency shuttle crew support CSCSAT commercial synchronous communication satellite CSD Chemical Systems Division CSD computer system director CSD contract start date CSD control system development CSD Crew Systems Division CSDD Control Systems Development Division (JSC) CSDF central source data file CSDL Charles Stark Draper Laboratory (MIT) CSDM Computer System Diagnostic Manual CSDT computer software data tape CSE common support equipment CSE communications systems engineer CSE computer support equipment CSE configuration switching equipment CSE cryostat servicing equipment CSF central supply facility CSF cost sensitivity factor CSF crew storage facility CSFT combined subsystem functional test CSG Concept Synthesis Group CSI coelliptic sequence initiation CSI control and structural integrity CSI control servo input CSI crew software interface CSI customer source inspection CSIR computer software integration review CSIR computer systems (hardware/software) integration review CSIR Council of Scientific and Industrial Research CSIT CAP system integration test CSIU core segment interface unit CSL command signal limiter CSL computer status light CSL critical sequence list CSM Cargo System Manual CSM command and service module CSM command service module CSM common support module CSM computer status matrix CSMA/CD/TS carrier sense multiple access/collision dlot CSMP continuous system modeling program CSMP control system modeling program CSN customer source number CSO closely spaced object CSO Complex Safety Office CSOC Consolidated Space Operations Center CSOC Consolidated Support Operations Center CSOM Computer System Operator's Manual CSOP crew systems operating procedure CSP certified special processor CSPF critical single-point failure CSPL certified special processor list CSPO Control Systems Procurement Office CSPU core segment processing unit CSR certification status report CSR check signal return CSR check status register CSR check status report CSR contract status report CSR cost, schedule, and risk CSR crew station review CSRP Computer and Software Review Panel CSS computer subsystem CSS control stick steering CSS core segment simulator CSS crew safety system CSSE control system simulation equipment CSSR cost, schedule status report CST capsule systems test CST central standard time CST combined systems test CST complex safety technician CST contract supplemental tooling CST crew software trainer CST crew station trainer CST crew systems trainer (one-g trainer) CSTA crew software training aid CSTAR continuous stellar-tracking attitude reference CSTC Consolidated Space Test Center CSTS cryogenic storage and transfer system CSTU combined systems test unit CSU central switching unit CT center tap CT central time CT compact tension CT crawler-transporter CT current transformer CTA command and telemetry assembly CTA controlled thrust assembly CTC camera, timing, and control CTC chief test conductor CTCI contract technical compliance inspection CTCP configuration test change period CTCS central thermal control system CTDU cross-link transponder data unit CTE central timing equipment CTE coefficient of thermal expansion CTF commit to flight CTG Central Training Group CTG commonality task group CTI critical transportation item CTIS crawler-transporter intercom system CTL Canoga Test Laboratory CTL combat training launch CTL Component Test Laboratory (NASA) CTL controller tape location CTL critical to launch CTM contract technical manager CTM crystalline transitional material CTN Canton Island CTN certification test network CTP communications timing procedure CTP cyclic time processor CTPD Crew Training and Procedures Division (JSC) CTR certification test requirement CTR certification test review CTR contract technical representative CTRS component test requirements specification CTS Canadian technology satellite CTS coordinate transformation system CTS change tracking system CTS command and telemetry subsystem CTS communications and tracking system CTS communications technology satellite CTS computer test set CTS computerized training system CTS console test set CTS contractor technical service CTT command transfer tape CTU central timing unit CTU command and telemetry unit CTU command telemetry unit CTV compatibility test van CU control unit CU crystal unit CUB Commonality Usage Board CUC computer usage control CUDS cumulative data statistics CUE command uplink electronics CUE command use equipment CUE common usage equipment CUE communication unit executor CUF cross-utilization file CUI common usage item CUI common user interface CUIL common usage item list CUL common use list CUP commonality usage proposal CUT coordinated universal time CV carrier vehicle CV cryptovariable CV Deployable Payloads Operation (KSC CO directorate) CV check valve CV coefficient of variation CV computer vision CV Computervision CV Computervision (computer-aided design and drafting CV configuration verification CV conventional vehicle CV core vehicle CVA Convair Astronautics CVAD converter voltage, ac to dc CVAS configuration verification accounting system CVD chemical vapor deposition CVDA converter voltage discrete, ac CVE complete vehicle erector CVF circular variable filter CVI carbon vapor impregnation CVI chemical vapor infiltration CVI configuration verification inspection CVR change verification record CVR configuration verification review CVRD converter variable resistance to dc voltage CVSD continuous variable slope data CVT communications vector table CVT concept verification testing CW caution and warning CW clockwise CW command word CW continuous wave CW continuous waveform CWA caution and warning annunciator CWA clean work area CWA controlled work area CWBS contract work breakdown structure CWE caution and warning electronics CWEA caution and warning electronic assembly CWEU caution and warning electronics unit CWFSP caution and warning/fire suppression panel CWG Commonality Working Group CWG Communications Working Group CWG constant-wear garment CWLM caution and warning limit module CWS caution and warning system CWSU condensate water servicing unit CWT code walk-through CY calendar year CYC cyclic mission-unique process CYI Canary Islands CZCS coastal zone color scanner Cal/OSHA California Occupational Safety and Health Act CdT cadmium telluride Cf consequence of failure CfS schedule factor D density D digital D discrete D drag D&C displays and controls D&CS displays and controls subsystem D&D design and development D&P development and production D&P drain and purge D&PA design and product assurance D* normalized detectivity D/A decoder activate D/A digital to analog D/C displays and controls D/D digital-digital converter D/L data link D/L deorbit and landing D/L downlink D/L downlist D/P data pack D/S deploy/stow D/S descent stage D/VD data/voice data DA data acquisition DA drive assembly (solar array) DA Department of the Army DA deployed assembly DA deployment assembly DA dip angle DA direct ascent DA distribution assembly DA double amplitude DA drive actuator DA&D data acquisition and distribution DA&E data analysis and evaluation DAA designated approval authority DAAT distributed architecture analysis tool DAB Defense Acquisition Board DAB docking and berthing DABM defense against ballistic missiles DABS discrete address beacon system DAC data acquisition and control DAC data acquisition camera DAC days after contract DAC digital-to-analog converter DACB data acquisition control and buffer DACBU data acquisition and control buffer unit DACBU digital acquisition and control buffer unit DACP data acquisition and control processor DACP data acquisition control processor DACP data acquisition, control, and processing DACS data acquisition and control system DACS digital acquisition and control system DACT disposable absorption collection trunk DAD data acquisition and distribution DAD due at department DADE data acquisition and documentation equipment DADS dual air density satellite DAE data acquisition equipment DAF data analysis facility DAFT data acquisition frequency table DAI deferred acceptance item DAIS data avionics information system DAL data accession list DAL data acquisition list DAL data-aided loop DAM double-aluminized Mylar DAMMPS damping and metal matrix for precision structure DANASAT direct-ascent nuclear ASAT DAP data acquisition plan DAP descent analysis program DAP digital autopilot DAPS decommutation and processing system DAR data-aided receiver DAR defense acquisition regulation DAR deviation approval request DAR digital autopilot requirement DAR drawing analysis record DARCOM U.S. Army Material Development and Readiness Command DARPA Defense Advanced Research Projects Agency DARPA/LL DARPA Lincoln Laboratory DART director and response tester DARTS digital automated radar tracking system DAS data acquisition system DAS data analysis station DAS data automation system DAS design, analysis, and simulation DAS digital address system DAS digital avionics system DASA dual aerospace servoamplifier DASD direct-access storage device DAT direct-ascent threat DAU data acquisition unit DAU digital adapter unit DAV data available DAVL data available low DAZE different-alpha zero-strain E DB data base DB data buffer DB data bus DB dead band DB design baseline DB Disposition Board DB distribution box DB double-biased DB dry bulb DBA data base administrator DBC data buffer coupler DBC data bus control DBC data bus coupler DBC diameter bolt circle DBCI DB with respect to a circular polarized antenna DBCR data base change request DBD dead band DBDD data base design document DBE data bus element DBFN data bus file number DBG data bus group DBGMP data bus generation and maintenance package DBI data base interface DBIA data bus interface adapter DBIA data bus isolation amplifier DBIU data bus interface unit DBM data base management DBMS data base management software DBMS data base management system DBN data bus network DBP design baseline program DBRN data bank release notice DBS data base system DBS data bus simulator DBUR data bank update request DBW data bus wire DBW differential ballistic wind DC data control DC data coordinator DC design change DC display and control DC display coupler DC double contact DC&I documentation, control, and integration DCA Defense Communication Agency DCA design change authorization DCA digital command assembly DCA distribution control assembly DCAA Defense Contract Audit Agency DCAR Design Corrective Action Report DCARS data collection and reduction system DCAS data collection and analysis system DCAS Defense Contract Administration Services DCASMA Defense Contract Administration Services Management Area DCASR Defense Contract Administration Services Region DCASR-LA Defense Contract Administration Services Region, Los Angeles DCB Data Control Board DCB Design Control Board DCB drawing configuration baseline DCC data computation complex (JSC) DCC document control center DCCU decommutator conditioning unit DCCU digital cluster control unit DCCU digital communication and control unit DCD design control document DCD dual command decoder DCDS distributed computing design system DCE data and control electronics DCE deployable cargo element DCEA digital control electronics assembly DCEP data collection and evaluation plan DCF data control facility DCIB data communication input buffer DCIU digital control and interface unit DCL document change list DCM data and configuration management DCM data and control management DCM DECOM control memory DCM decommutator control memory DCM direction cosine matrix DCM display and control module DCMB Development Configuration Management Board DCN data change notice DCN design change notice DCN discontinued component notice DCN document change notice DCN drawing change notice DCNP document change notice proposal DCO detailed checkout DCOP detailed checkout procedure DCOP displays, controls, and operation procedure DCOS data communication output selector DCP data collection platform DCP data collection program DCP depot condemnation percent DCP development concept paper DCP development cost plan DCP display control program DCPEI DEU control program end item DCPEI display control program end item DCR data change request DCR document change review DCR DC responsivity DCR design certification review DCR design change record DCR design change request DCR design concern report DCR disposition of contract request DCR document change record DCR document change request DCRR design change requirement record DCS data collection system DCS digital command system (subsystem) DCS display and control system DCS document control system DCS dual checkout station DCS data communication system DCS data conditioning system DCS data control system DCS data conversion system DCS design communication system DCS design control specification DCS design criteria specification DCS detailed checkout specification DCSP digital control signal processor DCSU digital computer switching unit DCU digital computer unit DCU display and control unit DD data dictionary DD NSTS OPS deputy director of NSTS Operations DD data display DD decoder driver DD dedicated display DD deep-drawn DD deputy director DD directives documentation DD document director DD Mechanical and Facilities Engineering (DE Directorate) DD&CS dedicated display and control subsystem DD&R data display and review DD&RR Data Display and Review Room DD&T design, development, and test DD/HH:MM:SS day/hour:minute:second DDA data distribution assembly DDA digital differential analyzer DDAS digital data acquisition system DDC data distribution center DDC Defense Documentation Center DDC dual diversity comparator DDD data definition document DDD display decoder drive DDDL digital data downlink DDDS digital data distribution system DDDU display decoder driver unit DDES data display expert system DDHA digital data-handling assembly DDI discrete data input DDI discrete digital input DDL data base definition language DDL data downlink DDL display description language DDL distributed design language DDM data display module DDM data display monitoring DDM discrete data management DDM distributed data manager DDM distributed design methodology DDMS DOD manager for Space Shuttle support DDN defense data network DDO discrete data output DDO discrete digital output DDP data distribution panel DDP data distribution plan DDP design data package DDP design development plan DDP digital data processing DDPC digital data processing center DDPC digital data processing complex DDPF dedicated display processing function DDPS digital data processing system DDR Data Display Room DDR data display and review DDR design development record DDR detail design review DDS data display system DDS descent design system DDS detailed design specification DDS documentation distribution system DDT&E design, development, test, and engineering DDT&E design, development, test, and evaluation DDTF dynamic docking test facility DDTS dynamic docking test system DDU data display unit DDU decommutator distribution unit DDU digital display unit DDU display driver unit DE Design Engineering (KSC directorate) DE display electronics DE Doppler extractor DE double end DEA deployed electronics assembly DEA digital electronics assembly DEA display electronics assembly DEC Digital Equipment Corporation DECA display/AGAP electronic control assembly DECL deliverable equipment checklist DECL Direct Energy Conversion Laboratory (JSC) DECNET Digital Equipment Corporation network DECU data exchange control unit DEDA data entry and display assembly DEE digital events evaluator DEF development and evaluation facility DEI Data Engineering, Incorporated DEI deliverable end item DEI design engineering identification DEI design engineering inspection DEI design, engineering, and integration DEIS design engineering inspection simulation DEIS design evaluation and inspection simulator DEL deorbit, entry, and landing DELNI digital Ethernet local network interconnect DELOG design engineering logistics DELTA detailed labor and time analysis DEMP direct EMP DEMUX demultiplexer DEOSS demonstration of electro-optical surveillance sensor DEP dedicated experienced processor DEP deflection error probable DEP display electronics package DER drawing error report DES data exchange system DESHE distributed expert system hosting environment DESPOT design performance optimization DET digital event timer DET direct energy transfer DETA diethylene triamine DETEC defensive technology evaluation code DETIR Defensive Technology Information Repository DEU digital electronics unit DEU display electronics unit DEU-KYBD display electronics unit equivalent inputs DEW directed-energy weapon DEW distant early warning DF development flight DF development forward DF direct flight DF direction finder DF disassembly facility DF double feeder DF drawing file DF drop forge DF Project Management (KSC DE directorate) DF-SPE-A Shuttle Project Engineering Office DF/CMB data formatter and command monitor bus DFCS digital flight control software DFCS digital flight control system DFD data flow diagram DFE data flow engineer DFE direction-finding equipment DFE distributed framework executive DFG diode function generator DFG display format generator DFI development flight instrumentation DFI development flight integration DFIS DFI subsystem DFL decommutator format load DFRF Dryden Flight Research Facility DFS directional finding system DFS dynamic flight simulator DFT design for testability DG Data General DG data group DG data good DG display generator DG double groove DGU digital graphics unit DGU display generator unit DGZ desired ground zero DH decision height DHA design hazards analysis DHE data handling equipment DHP developed horsepower DHS discrete horizon sensor DI data integrator DI desk instruction DI discrete input DI driving issue DIA Defense Intelligence Agency DID data item description DID defense in depth DIDS defense integrated data system DIDSIM defense-in-depth simulation DIDTHT defense-in-depth threat DIEU digital interface electronics unit DIGIKON digital control analysis software DIH discrete input high DII defense industry initiative DIL deliverable items list DIL discrete input low DILSA distributed integrated logistics support analysis DIM design impact meeting DIM Design Information Manual DIM Design Interface Meeting DINS defense inertial navigation system DIP data integrated plan DIP designated inspection point DIP detailed integration plan DIP display input processor DIP display interface processor DIPEC Defense Industrial Plant Equipment Center DIPL display initial program load DIPS dynamic isotope power system DIR document information record DIS Defense Investigative Service DIS defense industrial security DIS documentation index system DISCO Defense Industrial Security Clearance Office DISP dispersive spectrometer DIT data ID table DIT display index table DIT dynamic integrated test DITMCO Drive-In Theater Manufacturing Company's wire harness insulation analyzer DITMO development, integration, test, and mission operations DIU data interface unit DIU digital interface unit DK display keyboard DKC design knowledge capture DL developed length DL development left DL downlink DL drawing list DL Electronics Engineering (KSC DE directorate) DLAT destructive lot acceptance testing DLC delay line control DLC direct lift control DLH direct labor hour DLO director of launch operations DLSC Defense Logistics Service Center DLSM data link summary message DLTR data link terminal repeater DLTR data link transmission repeater DM data management DM docking mechanism DM docking module DM data manager DM data manual DM deformable mirror DM delta modulation DM design manual DM design margin DM detached module DM development motor DMA data management administrator DMA data management assembly DMA Defense Mapping Agency DMA direct memory access DMA drive motor assembly DMC data management computer DMC direct maintenance cost DMCF deservicing, maintenance, and checkout facility DMCM double-density modular core memory DME distance measuring equipment DME dynamic mission equipment DMES dimethylethoxys DMF depot maintenance facility DMG Data Management Group DMICB Daily Mission Integration Control Board DMIS data management information system DML developmental instrumentation, MDM left DMM developmental instrumentation, MDM mid DMMH direct maintenance man-hours DMON discrete monitoring DMOS diffusive mixing of organic systems DMP data management processor DMP data merger processor DMP DEU message processor DMPI desired mean point of impact DMR developmental instrumentation, MDM right DMS data base management system DMS data management system (subsystem) DMS deliverables management system DMS design management system DMS docking mechanism subsystem DMS docking module system (subsystem) DMS DRD management system DMS DRL management system DMS dynamic motion simulator DMSIF DMS Integration Facility DMSP Defense Meteorological Satellite Program DMSS data management system simulator (CVT) DMSS defense meteorological satellite system DMSSIM DMS simulation DN Department of the Navy DN discrepancy notice DNA Defense Nuclear Agency DNA does not apply DNC direct numerical control DNO descending-node orbit DNS departure nuclear stage DO discrete output DOA Department of Agriculture DOAMS distant-object attitude-measuring system DOC Department of Commerce DOC direct operating cost DOC drift-orbit correction DOD Department of Defense DOD depth of discharge DOD-STP Department of Defense standard satellite DODI DOD instruction DODISS Department of Defense Index of Specifications and Standards DOE Department of Energy DOF degree of freedom DOF direction of flight DOH discrete output high DOI descent orbit insertion DOI direct orbit insertion DOL day of launch DOL Department of Labor DOL discrete output low DOM development operations manager DOMSAT domestic satellite DOP detailed operating procedure DORIS determination of orbit radio positioning integrated from Shuttle (French- supplied dual-frequency receiver) DOS digital operation system DOS disk operating system DOT data output tape DOT Department of Transportation DOT deployment operations team DOT/CIAP DOT climatic impact assessment program DOVAP Doppler velocity and position DOY day of year DP dash pot DP diametral pitch DP differential pressure DP double pole DP data processing DP data processor DP data product DP deflection plate DP delayed procurement DP design proof DP development phase DP dew point DP&S data processing and software DP&SS data processing and software subsystem DP/DT delta pressure/delta time DPA data processing assembly DPA destructive physical analysis DPA division planning authorization DPAS defense priorities and allocation system DPC data processing center DPCL dedicated payload communication link DPCS distributed process construction system DPD data procurement document DPDM differential pulse-duration modulation DPDO Defense Property Disposal Office DPDS distributed processing design system DPDT double pole, double throw DPG dual-purpose gyro DPI detail program interrelationship DPM deputy program manager DPP deployment/pointing panel DPR definition phase review DPRS docking probe retraction system DPS data processing and software DPS data processing system (subsystem) DPS Department of Defense project specification DPS descent propulsion system DPS digital processing system DPSD Data Processing Systems Division DPSK differential phase shift keying DPSS data processing and software subsystem DPSS data processing software system DPST double pole, single throw DPT design proof test DPU data processing unit DPU digital processing unit DQPSK differential quaternary phase shift keying DR data register DR disposition report DR data requester DR data requirement DR dead reckoning DR design review DR development right DR discrepancy report DR dispatch reliability DR disposition record DR&A data requirements and analysis DR/MR discrepancy report/material review DRA document release authorization DRAM dynamic random access memory DRAT data requirements analysis tool DRB Design Review Board DRB design requirements baseline DRC data reduction center DRC discrete rate command DRD data requirements description DRD data requirements document DRD design requirements document DRD detailed requirements document DRD document requirement description DRF data request form DRF digital radio frequency DRG digital ranging generator DRI data rate indicator DRK display request keyboard DRL data requirements list DRL document requirements list DRL double-rack laboratory DRM data records management DRM Design Reference Mission DRM Design Requirements Manual DRM Drafting Room Manual DRM Drawing Requirements Manual DRMR disposition report on MR DRO destructive readout DRO document release order DRR data recorder or reproducer DRR design requirements review DRRD design requirements review disposition DRS data recording system DRS data relay satellite DRS data relay station DRS digital range safety DRS discrepancy report squawk DRS donning and recharge system DRS dynamic restringing DRSCS digital range safety command system DRSS data relay satellite system DRSS discrepancy report squawk sheet DRT deployment readiness test DRT design reference trajectory DRUC disposition record unsatisfactory condition DS data storage DS design sheet DS docking system DS&R data storage and retrieval DS-RPIE direct support real property installed equipment DS3 deep-space surveillance system DSA Defense Supply Agency DSA demonstration structural article DSAD Data Systems and Analysis Directorate (JSC) DSARC Defense System Acquisition Review Committee DSARC Defense Systems Acquisition Review Council DSAT defensive satellite DSB document status bulletin DSB double side-band DSC data separator card DSC dedicated signal conditioner DSC differential scanning calorimeter DSCIM display system computer input multiplexer DSCN design and simulator computation network DSCS defense satellite communications system DSCS defense support communication satellite DSCU digital computer switching unit DSD defensive shields demonstration DSDU data storage distribution unit DSE data storage encoder DSE data storage equipment DSE development support equipment DSEA data storage electronics assembly DSFT distributed system fault tolerance DSI distributed system integration DSIF Deep-Space Instrumentation Facility DSIFE DSIF equipment DSIS defense satellite information system DSKY display keyboard DSL design specification list DSM data system(s) modernization DSN data steering network DSN deep-space network DSN digital switching network DSN diminishing source notice DSO design secondary objective DSO detailed secondary objective DSO detailed supplementary objective DSP defense support program DSP digital signal processing DSPM designated subsystem project manager DSR data storage and retrieval DSS data support system DSS DCDS support system DSS decision support system DSS deep-space station DSS deliverable survival shelter DSS department summary schedule DSS documentation support services DSSM dedicated solar sortie mission DST defense suppression threat DST dimensional special tooling DSTF Delta Spin Test Facility DT delayed time DT double throw DT drop tank DT&E development, test, and evaluation DT&O data, test, and operation DTA daisy testability analyzer DTA development test article DTA differential thermal analyzer DTC design to cost DTCS digital test command system DTCW data transfer command word DTE data transmission equipment DTE deliverable test equipment DTE digital television equipment DTF Development Test Facility (Ford Aerospace) DTI development test instrumentation DTIC Defense Technical Information Center DTLCC design to life cycle cost DTMO development, test, and mission operations DTMS development, test, and mission support DTMS digital test measurement system DTMS digital test monitor system DTO design test objective DTO detailed test objective DTP detailed test plan DTP detailed test procedure DTP development test plan DTRD development test requirements document DTS data transfer system DTS data transmission system DTS Defense Technology Study DTS Defensive Technologies Study DTS development test sensor DTSL Data Transfer Systems Laboratory DTST Defense Technology Study Team DTST Defensive Technologies Study Team DTT design test tool DTU development test unit DTV developmental test vehicle DTV&I development, test, verification, and integration DTVC data transmission and verification converter DTVC digital transmission and verification converter DU display unit DUA digital uplink assembly DUC digital uplink command DUC display use chain DUNS Data Universal Numbering System DV designated verification DV designee for verification DVD delta velocity display DVE design verification experiment DVM digital voltmeter DVO delta velocity on/off DVS delta velocity system DVS design verification specification DVS digital voice system DVT design verification testing DVU delta velocity ullage DW data word DW developed width DW distilled water DW double weight DWI data word in DWS disaster warning satellite DWT dog wags tail DYB dynamic braking E elastic modulus E elevation angle E&D engineering and development E&D evaluation and development E&DSG Electro-Optical and Data Systems Group E&L engineering and lab E&M electrical and mechanical E&O engineering and operations E-E end to end E-O electro-optic E-mail electronic mail E/B equipment bay E/C encoder coupler E/D edge distance E/L entry/landing E/M engineering model E/M escape motor E/O engineering/operations E/OCM electromagnetic/optical countermeasure E/P electron/proton E/W energy-to-weight ratio EA electronics assembly EA elevation angle EAC early analysis capability EAC employee action circle EAC energy-absorbing capacity EAC estimate at completion EAC experiment apparatus container EAC experimental apparatus canister EACE early analysis capability enhanced EAD electrically alterable device EADI electronic attitude director indicator EADS engineering analysis and data systems EADT experiment agency data tape EAF engineering analysis facility EAF engineering analysis function EAFB Edwards Air Force Base EAFB Eglin Air Force Base EAFB Ellington Air Force Base EAI Electronics Associates, Incorporated EAL equipment airlock EAM electrical accounting machine EAM emergency action message EAP Employee Assistance Program EAR engineering action request EAR engineering analysis report EAR environmental analysis report EAROM electrically alterable read-only memory EAS engine actuation system EAS equivalent airspeed EASE electric automatic support equipment EASE expert activity scheduling environment EAT environmental acceptance test EATR extravehicular assist teleoperator robot EB electronic beam EB emergency box EB equipment bay EB expendable booster EBC emulated buffer computer EBCDC extended binary-coded decimal EBD eyeballs down (+GZ) EBF3 Electron-Beam FreeForm Fabrication EBI eyeballs in (+GX) EBL eyeballs left (+GY) EBO eyeballs out (-GX) EBR eyeballs right (-GY) EBS emergency breathing subsystem EBU eyeballs up (-GZ) EBW exploding bridge wire EC elastic center EC events coupler EC experiment computer EC element contractor EC enabling command EC engine control EC engine cutoff EC engineering change EC equipment change EC essentiality code EC events controller ECA electronic computer assembly ECA electronic control assembly ECA engine control assembly ECA engineering change analysis ECA epoxy curing agent ECAS experiment computer application software ECB Engineering Change Board ECB event control block ECB event controlled block ECB events control buffer ECC engineering change control ECC engineering critical component ECCAP electromagnetic compatibility circuit analysis program ECCAP electromagnetic compatibility computerized analysis ECCAP electromagnetic compatibility computer analysis proposal ECCB Engineering Change Control Board ECCCS emergency command control communications system ECCM electronic counter-countermeasure ECCP experiment configuration control panel ECD engineering control drawing ECD entry corridor display ECD estimate at completion change document ECD estimated completion date ECDU electronic coupling display unit ECF equivalency capability file ECG electrocardiogram ECG electrocardiograph ECG electrocardiography ECG electroepitaxial crystal growth ECI Earth-centered inertia ECI employment cost index ECK emergency communication key ECL electronic circuit logic ECL emitter coupled logic ECLS environmental control and life support ECLSS environmental control and life support system ECM electromagnetic countermeasure ECM electronic countermeasure ECM engineering change management ECM error correcting memory ECN engineering change notice ECO electron-coupled oscillator ECO engine combustion ECO engine cutoff ECO engineering change order ECOS experiment computer operating system ECP engineering change proposal ECP engineering control program ECP explicitly coded program ECR engineering change request ECR equipment change record ECR experiment change record ECR experiment concept review ECRA engineering change request authorization ECRC Engineering Contract Requirements Committee ECRV exponentially corrected random variable ECS effective cross section ECS electrical control station ECS engine control system ECS environmental control system ECSS extendable computer system simulator ECT experiment command tape ECU electrical control unit ECU electrical conversion unit ECU electronic coupling unit ECU engine control unit ECU environmental control unit ECU extreme closeup ED edge distance ED Engineering Directorate ED Engineering Division ED engineering directive ED explosive device EDA electronic display assembly EDA elevation drive assembly EDAC error detection and correction EDB environmental data book EDC Engineering Data Center EDC engineering design change EDCAS equipment designer's cost analysis system EDCC Engineering Drawing Control Center EDCP engineering design change proposal EDCS electrical distribution and control system EDDF error detection and decision feedback EDDR electron dipole-dipole reservoir EDF engineering data file EDI electronic data interchange EDI electronic data interfacing EDIV engineering design intent verification EDL Engineering Development Laboratory EDLN engineering development logic network EDLS engineering drawing library system EDM electrical discharge machining EDM engineering development model EDMS electronic data management system EDO extended-duration orbiter EDP electronic data processing EDP embedded data processor EDPC Electronic Data Processing Center EDPE electronic data processing equipment EDPL Engineering Development Processor Laboratory EDPM electronic data processing machine EDR engineering design review EDS electrical distribution system EDS emergency detection system (subsystem) EDS engineering data system EDS engineering design system EDS engineering development schedule EDS executive data base system EDS explosive device system EDSC early deployment system concept EDT eastern daylight time EDT electronic theodolite system EDTS electronic data transfer system EDV electric depressurization valve EDV electronic depressurizing valve EDW Edwards (TACAN station) EE emergency engineering EE end effector EE experimental evaluation EECOM electrical, environmental, and communications EECOM electrical, environmental, consumables, and mechanical EED electroexplosive device EEE electronic, electrical, and electromechanical EEEU end effector electronics unit EEG electroencephalogram EEG electroencephalograph EEG electroencephalography EEH EMU electrical harness EEI Edison Electrical Institute EEI essential elements of information EEL electrical equipment list EEM Earth entry module EENT eye, ear, nose, and throat EEO Equal Employment Office EEO equal employment opportunity EEP electronic equipment package EEPROM electrically erasable read-only memory EES ejection escape suit EES emergency ejection suit EES escape ejection suit EESS emergency egress severance system EESS emergency egress slide system EET electronic control assembly engine thrust EET entry elapsed time EET equivalent exposure time EETB electronic/electrical termination building EEU extravehicular excursion unit EEWS emergency egress window system EF electronic field EFA experiment flight application EFCS Earth-fixed coordinate system EFE electronic field experiment EFFGRO efficient growth (computer program) EFL effective focal length EFL equivalent focal length EFP ESA-furnished property EFSSS engine failure sensing and shutdown system EFT-1 Exploration Flight Test 1 (Orion capsule) EFTO encrypted for transmission only EGA evolved gas analysis EGB electronic gimbal box EGC experiment ground computer EGF electrical grapple fixture EGIL electrical, general instrumentation, and lighting EGO eccentric geophysical observation EGORD Experiment Ground Operations Requirements Document EGRET energetic Gamma Ray Explorer telescope EGSE electrical ground support equipment EGT elapsed ground time EGT estimated ground time EGT exhaust gas temperature EH/M extension hose mouthpiece EHA electrohydraulic actuator EHC electrical heating control EHF extremely high frequency EHOT external hydrogen/oxygen tank EHP effective horsepower EHP electrical horsepower EHS environmental health services EHSD existing hardware/software data base EHX experiment-dedicated heat exchanger EI electronics interface EI end item EI engineering instruction EI entry interface EI environmental impact EIA Electrical Industries Association EIASN end item assembly sequence number EIAT end item acceptance test EIC Engineering Information Center EIC experimental intercom EICD experiment interface control document EID end item documentation EIDP end item data package EIFA element interface functional analysis EIM engineering information management EIR environmental impact report EIR experiment integration review EIRP effective isotropic radiated power EIS electrical integration system EIS end item specification EIS engineering information system EIS environmental impact statement EIT entry interface time EIU engine interface unit EIVT electrical and instrumentation verification test EIVT electrical interface verification test EIVT electronic installation verification test EIWB end item workbook EKF extended Kalmar filter EKG electrocardiogram EKG electrocardiograph EKG electrocardiography EL elastic limit EL electroluminescence EL equipment laboratory ELACS extended-life attitude control system ELB electrical load bank ELC Earth limb clutter ELDV electrically operated depressurization valve ELE Earth limb experiment ELF extremely low frequency (1 Hz to 3 kHz) ELINT electronic intelligence satellite ELM experimental logistics module ELMS elastic-loop mobility system ELN Digital Equipment Corporation's real-time operating sn ELP English language program ELRAD Earth limb radiance ELS eastern launch site ELS elevon load system ELS external lighting system ELT emergency locator transmitter ELV Earth launch vehicle ELV expendable launch vehicle EM electromagnetic EM engineering model EM exception monitor EM&IAS electromechanical and integrated avionics subsystem EMA electromagnetic analysis EMA electromechanical actuator EMA engineering and manufacturing aid EMC electromagnetic capability EMC electromagnetic compatibility EMC electromagnetic control EMC equivalent mission cycle EMCC Emergency Mission Control Center EMCD electromechanical control diagram EMCFA electromagnetic compatibility frequency analysis EMCI engineering model configuration inspection EMCON emission control EMD entry monitor display EMDM enhanced multiplexer/demultiplexer EMEC electromagnetic effects capability EMEC electromagnetic effects compatibility EMEC enhanced master events controller EMES electrical, mechanical, and environmental systems EMF electromotive force EMG electromyogram EMG electromyograph EMG electromyography EMI electromagnetic interface EMI electromagnetic interference EMISM electromagnetic interference safety margin EMK emergency medical kit EML Electromagnetic Laboratory EML electromagnetic launcher EMM electromechanical mockup EMMA expert missile maintenance aid EMMA expert missile maintenance aim EMN engineering management network EMON exception monitoring EMP electromagnetic pulse EMP enhanced MDM pallet EMP equipment mounting plate EMPGS electromechanical power generation subsystem EMR Eastern Missile Range EMR engine mix ratio EMR engine mixture ratio EMR executive management review EMRL equipment maintenance requirements list EMRLD excimer moderate Raman-shifted laser device EMS electromagnetic susceptibility EMS engineering master schedule EMS entry monitor subsystem EMS entry monitoring system EMSP enhanced modular signal processor EMT electrical metallic tubing EMU engineering model unit EMU extended memory unit EMU extravehicular mobility unit EMWA engineering minor work authorization ENDF evaluated neutron data file ENG electronystagnogram ENS en route nuclear shuttle ENVIRON space natural environment model EO Earth observation EO Earth orbit EO electro-optic EO electro-optics EO Electronic Operations EO engine-out EO engineering order EOAS engineering order accountability system EOC early operational capability EOC edge of coverage EOC Electro-Optical Center EOC end of contract EOC engine order capability EOC engine-out capability EOCM electro-optical countermeasure EOCR engineering order control record EOD estimated on dock EOD explosive ordnance disposal EODB end of data block EODRS Earth observation data retrieval system EOF end of file EOG electroculogram EOHT external oxygen and hydrogen tank EOI Earth orbit insertion EOL Earth orbit launch EOL end of life EOL end of line EOM Earth orbital mission EOM end of message EOM end of mission EOM Engineering Operations Manual EOM equation of motion EOMF end of minor frame EOP Earth and ocean physics EOP emergency oxygen pack EOPAP Earth and ocean physics application program EOPF end of powered flight EOPR engineering order purchase request EOPR engineering order purchase requisition EOQ economic order quantity EOQ end of quarter EOR Earth orbit rendezvous EOR end of refresh EORQ engineering order request for quotation EORSAT electronic ocean reconstruction satellite EOS Earth observation satellite EOS Earth-orbit Shuttle EOS electrophoretic separation EOS emergency oxygen system EOS extended operating system EOSH electro-optical sensor hardening EOSS Earth-orbital space station EOSS extravehicular activity operational slide-wire system EOT end of tape EOT end of transmission EOTF engineering order to follow EOTS electro-optical threat sensor EOW energy over weight EP elbow pitch EP electrical power EP equivalent person EP equivalent personnel EP experiment planning EP&PS electrical power and pyrotechnics subsystem EPA engineering personnel authorization EPA engineering project authorization EPA Environmental Protection Agency EPA estimated plan of action EPC electronic parts control EPC error protection code EPC external power contractor EPCDC electrical power conditioning, distribution, and control EPD electrical power distribution EPD emergency procedures document EPD&C electrical power distribution and control EPD&CS electrical power distribution and control subsystem EPDB experiment power distribution box EPDC electrical power distribution and control EPDCS electrical power distribution and control system EPDM ethylene propylene diene monomer EPDS electrical power distribution system EPDU electrical power distribution unit EPG electrical power generator EPGCS electrical power generation and control subsystem EPGS electrical power generation subsystem EPIRSS extended-performance infrared search set EPL electrical power level EPL electronic, electrical, and electromechanical parts list EPL emergency power level EPL expected power level EPM engineering project manager EPMS engineering performance management system EPO element project office EPOC External Payload Operations Center EPPSS electrical power/pyro sequential system EPR engine pressure ratio EPR engineering purchase request EPRN emergency program release notice EPROM erasable programmable read-only memory EPS electrical power system (subsystem) EPS emergency power system EPS experimental power supply EPSP experiment power switching panel EPSTF Electrical Power System Test Facility EPT emergency procedure trainer EPT environmental proof test EPT ethylene propylene terpolymer EPT external pipe thread EPTU events per time unit EPWG Environmental Projects Working Group EPWG Experiment Planning Working Group EPY electronic control assembly pitch and yaw EQE event queue element ER established reliability ER explanation report ER extended reliability ER&I engine receiving and inspection ERA electrical replaceable assembly ERA element-relationship-attribute ERAP Earth resources aircraft program ERB Engineering Review Board ERBACT ERB action item ERBM extended-range ballistic missile ERBS Earth radiation budget satellite ERC Employee Recognition Center ERC event recorder ERCAR electrochemically regenerable CO2 absorber and ERCB Energy Resources Control Board ERCM engineering requirements and change management EREP Earth resources package ERETS Edwards rocket engine test site ERG electroretinogram ERG electroretinograph ERG electroretinography ERIM Environmental Research Institute of Michigan ERINT exoatmospheric reentry vehicle interceptor ERIS endoatmospheric reentry vehicle interceptor system ERIS exoatmospheric research interceptor system ERISA Employee Retirement Income Security Act ERM executive review meeting ERNO Entwicklungts Ring Nord Organization, Space Division of Eum, VFW-Fokker- Mannheim, Germany (Spacelab contractor) ERO engineering release operation ERP educational reimbursement program ERP effected radiative power ERP effective radiation power ERP elevator reference plane ERP eye reference point ERR electrical resistance requirement ERR engineering release record ERRC expendability, recoverability, and repair capability ERRP equipment replacement and refurbishment plan ERS engineering release system ERS entry and recovery simulation ERSI elastomeric reusable surface insulation ERSIR Earth resources Shuttle imaging radar ERTG economic radioisotope thermoelectric generator ERTS Earth resources technology satellite ERU Earth rate unit (15 deg/hr) ERV experimental reentry vehicle ERV expiratory reserve volume ES Earth sensor ES Electrochemical Society ES engineering specification ES equal section ES escape system ES experiment segment ES expert system ESA engineering supply area ESA engineering support area ESA engineering system assembly ESA European Space Agency ESA explosive safe area (KSC) ESB essential switching box ESCA electron spectroscopy for chemical analysis ESCS electronic spacecraft simulator ESD Electronic Systems Division (NASA) ESD Electronics Systems Division (USAF) ESD electrostatic discharge ESD emergency shutdown ESD Experiment Systems Division ESDAC European Space Data Center (Darmstadt, Germany) ESDP external sensor data processing ESDU event storage and distribution unit ESE electrical support equipment ESE electronic support equipment ESE engineering support equipment ESE EVA support equipment ESF explosive safe facility ESI electrical system integration ESM electronic support measure ESM energy storage module ESM environmental systems monitor ESM experiment support module ESMC Eastern Space and Missile Center ESMCR Eastern Space and Missile Center regulation ESMS environmental and special measurements systems ESO event sequence override ESOC European Space Operations Center ESOW engineering statement of work ESP economic simulation program ESP electroshock protection ESP Employee Suggestion Program ESP engineering simulator program ESP environmental sensing platform ESP experiment sensing platform ESPS experiment segment pallet simulator ESR effective sunrise ESR engineering support request ESR equipment status report ESRIN European Space Research Institute ESRO European Space Research Organization ESS early space station ESS effective sunset ESS emergency survival system ESS energy storage subsystem ESS environmental support system ESS equipment support section ESS experiment subsystem simulator ESSA electrically steerable spherical array ESSA Environmental Sciences Services Administration ESSC Engineering Support Services Contract EST eastern standard time ESTA escape system test article ESTEC European Space Technology Center ESTF Electronic System Test Facility (NASA) ESTL Electronic Systems Test Laboratory ESU eyepiece storage unit ESV emergency shutoff valve ESVS escape suit ventilation system ESVS escape system ventilation system ESW engine status word ET edge thickness ET elapsed time ET element test ET elevated temperature ET event timer ET external tank ETA engineering test article ETA estimated time of arrival ETA estimated time to acquisition ETA explosive transfer assembly ETA external tank attachment ETB equipment transfer bag ETC Earth terrain camera ETC estimate to completion ETC estimated cost to complete ETC Greenbelt, Maryland (STDN site) ETCO equipment transfer/change order ETD electrical terminal distributor ETD estimated turnover date ETD evolutionary terminal defense ETD external tank door ETE end to end ETEDB external thermal environment data base ETEEM end-to-end engagement model ETEEM end-to-end engineering model ETF Eglin Test Facility ETI elapsed-time indicator ETIC estimated time in commission ETL Environmental Test Laboratory ETLOW external tank lift-off weight ETM elapsed-time meter ETM engineering test model ETO Earth to orbit ETO ethylene oxide ETOC estimated time of correction ETP engineering test phase ETP environmental test plan ETP equipment test plan ETPY electronic control assembly thrust vector pitch and yaw ETR Eastern Test Range ETROD Eastern Test Range operations directive ETRR environmental test readiness review ETS electrical test set ETS energy transfer system ETS external tank system (subsystem) ETSS external tank separation subsystem ETT estimated time of track ETUD external tank umbilical disconnect ETV electrical test vehicle ETVA external tank vent arm EU electronic unit EU engineering unit EU experimental unit EURECA European retrievable carrier EUROCOMSAT European consortium communications satellite EUV extreme ultraviolet EUVE extreme ultraviolet experiment EV earned value EV entry vehicle EV expendable vehicle EV extravehicular EV88 Experiment Version 88 (BMC3 experiment) EVA earned-value analysis EVA extravehicular activity EVAL Earth-viewing applications laboratory EVAS extravehicular activity system EVATA extravehicular activity translational aid EVC extravehicular communications EVCF Eastern Vehicle Checkout Facility EVCON events control (controller) EVCS extravehicular communications system EVCU extravehicular communications umbilical EVD external visual display EVDE external visual display equipment EVF equipment visibility file EVLSS extravehicular life support system EVM Earth-viewing module EVMU extravehicular mobility unit EVO engineering verification order EVS equipment visibility system EVS extravehicular suit EVSC extravehicular suit communications EVSS extravehicular space suit EVSTC extravehicular suit telecommunications EVSU extravehicular space unit EVT extravehicular transfer EW electronic warfare EWA estimated warehouse arrival EWE emergency window escape EWM engineering wring-out meeting EWO engineering work order EWR engineering work request EWW extended workweek EXC experiment computer EXCABL expert cable (automated payload cabling system) EXH exchange hardware EXMATCH expert drawing matching system EXO experiment operator (in Spacelab) EXT experiment terminal (operator console on Spacelab) EXTRAJ ascent trajectory (design expert system) F Fahrenheit F farad F floating point F force F&A fabrication and assembly F&D fill and drain F&E facility and environment F&IE facilities and industrial engineering F&M force and moment F&P fluids and propulsion F&PC finance and program control F-F face-to-face F/A fabrication and assembly F/A failure analysis F/A fuel-to-air ratio F/C fire control F/C fit check F/C flight control F/C flow control F/C fuel cell F/D face of drawing F/D field of drawing F/D fill/drain F/E full/empty F/F fill/full F/O fuel oxidizer F/R flared rudder FA factor analysis FA failure analysis FA feedback analysis FA final approach FA final assembly FA flight acceptance FA flight aft FA flight-critical aft FA fully automatic FA< first approach and landing test FA/COSI final assembly closeout systems installation FAA false alarm avoidance FAA Federal Aviation Administration FAB flight assignment baseline FABU fuel additive blender unit FACC Ford Aerospace and Communications Corporation FACI first-article configuration inspection FACO fabrication and acceptance checkout FACO factory acceptance checkout FACO factory assembly and checkout FACO final assembly checkout FACR first-article configuration review FACS finance and control system FACT first-address control table FACT flexible automatic circuit tester FACT flight acceptance composite test FACTS FDF automated control and tracking system FAD final approach display FAD flight assessment delta FAE final approach equipment FAF final assembly fixture FAF first aerodynamic flight FAFS Falcon Air Force Station FAIR fabrication, assembly, and inspection record FAIR fly-along infrared FAL facility area layout FAL first approach and landing FAME formatting and multiplexing equipment FAMOS flight acceleration monitor system FAMS FDF automated monitoring system FAMU fuel additive moisture unit FAO flight activities officer FAP final approach plane FAP FORTRAN assembly program FAPE Florida Association of Professional Employees FAR failure analysis report FAR Federal Aviation regulation FAR federal acquisition regulation FAR final acceptance review FAR flight acceptance review FAR flight analysis review FAS flight analysis system FAS forward acquisition sensor FASCOS flight acceleration safety cutoff system FAT factory acceptance test (some subcontractors) FAT final acceptance test (Rockwell) FAT flight attitude table FAWG Flight Assignment Working Group FB feedback FB field bulletin FB final braking FB flat bar FB fleet broadcast FBAS fixed-base aft station FBB flyback booster FBC fluidized-bed combustion FBCS fixed-base crew station (SMS) FBM fleet ballistic missile FBV field-base visit FBV fuel bleed valve FC facility control FC ferrite core FC fire control FC fit check FC flight computer FC flight control FC flight critical FC fuel cell FCA field change analysis FCA flow control assembly FCA forward controller assembly FCA frequency control analysis FCA functional compatibility analysis FCA functional configuration audit FCAF Flight Crew Accommodation Facility FCAP flight control applications program FCB Fracture Control Board FCC Federal Communications Commission FCC flat conductor cable FCCP firm contract cost proposal FCD Flight Control Division (NASA) FCDB flight control data bus FCDC flexible confined detonating cord FCDR final critical design review FCE fast-cycle executive FCE flight control equipment FCE flight crew equipment FCEF Flight Crew Equipment Facility FCEI facility contract end item FCEI facility contractor end item FCF first captive flight FCF functional check flight FCH Flight Controller's Handbook FCHL Flight Control Hydraulics Laboratory FCI flight control indicator FCI flight crew integration FCI functional configuration identification FCIM flight control interface module FCIP flight cargo implementation plan FCITE FCI time element FCL feeder control logic FCL fluid coolant loop FCL Freon coolant line FCL Freon coolant loop FCM flow control module FCMC facility control and monitor console FCMU foot-controlled maneuvering unit FCO field change order FCO final checkout FCO flight crew operations FCO functional checkout FCOB Flight Crew Operations Branch (NASA) FCOD Flight Crew Operations Directorate FCOH Flight Controller's Operational Handbook FCOS flight computer operating system FCOS flight control operating system FCOS flight control operational software FCP Failure Correction Panel FCP firm cost proposal FCP flight correction proposal FCP fuel cell power plant FCP fuel cell propellant FCPS fuel cell power system (subsystem) FCR facility change request FCR final configuration review FCR flight configuration review FCR flight control room FCRA fecal collection receptacle assembly FCRT flight display CRT FCS fecal containment system FCS federal communications system FCS fire control system FCS flight control simulator FCS flight control system FCS flight crew system FCS front crew system FCSD Flight Crew Support Division (JSC) FCSM flight combustion stability monitor FCSS fuel cell servicing system FCSTF Fuel Cell System Test Facility FCT filament center tap FCT flight control team FCT flight controller trainer FCT flight crew trainer FCT fuel cell test FCTB Flight Crew Training Building FCTF Fuel Cell Test Facility FCTR flight controller training room FCTS flight crew trainer simulator FCU fluid checkout unit FCV flow control valve FCW format control word FD fault detection FD flight day FD flight director FD freeze-dried FD function designator FD functional designator FD/FI fault detection/fault isolation FDA fault detection and annunciation FDA flight deck assembly FDAI flight director attitude indicator FDB facility data base FDB Fahrenheit dry bulb FDCF Flight Design Control Facility FDDB function designator data base FDDI fiber distributed data interface FDF first drop flight FDF flight data file FDI failure detector indicator FDI fault detection and identification FDI fault detection and isolation FDI flight detection and isolation FDI flight director instrument FDIIR fault detection, isolation, identification, and FDIR fault detection, identification, and recovery FDIR fault detection, isolation, and recovery FDIR fault detection/isolation and reconfiguration FDK flight display keyboard FDL flight director loop FDLC final design load cycle FDM flight data manager FDM flight design manager FDM frequency data multiplexer FDM frequency division multiplexer FDM frequency domain multiplexer FDMA frequency division multiple access FDO fee determination official FDO Flight Director's Office FDO flight dynamics officer FDOR flight design operations review FDP Flight Design Panel FDR final design review FDR flight definition requirement FDR functional design review FDRD flight definition and requirements directive FDRD flight definition and requirements document FDRD flight determination and requirements directive FDRI flight director rate indicator FDS failure dynamics software FDS functional design specification FDS fire detection and suppression FDS flight design and scheduling FDS flight design system FDS flight dynamics simulator FDS flight dynamics software FDS flight dynamics support FDS flight dynamics system FDS fluid distribution system FDSC flight dynamics simulation complex FDSC flight dynamics situation complex FDSCU fluid distribution system control unit FDSR final design status review FDT full-duplex teletype FDU fluid distribution unit FDX simultaneous, two-way, full-duplex channel FE flight execution FE flight executive FE flight experiment FE force execution FEA failure effects analysis FEA flight experiment apparatus FEA fluids experiment apparatus FEAT final engineering acceptance test FEB forward equipment bay FEB fourth entry battery FEB functional electronic block FEC field engineering change FEC forward events controller FECR final experiment concept review FED flight events demonstration FEDB flight execution data base FEDP facility and equipment design plan FEE failure effects evaluation FEID flight equipment interface design FEID flight equipment interface device FEID functional engineering interface device FEL first-element launch FEL free-electron laser FEM finite-element method FEM finite-element model FEMCPL facilities and environmental measurement component parts FEO field engineering order FEP fluorinated ethylene-propylene FEP front-end processor FEPC flight equipment processing contractor FERD facility and equipment requirements document FES flash evaporator system FES flight element set FESL failure effects summary list FESP flight execution support plan FET field effect transistor FET flight elapsed time FEWG Flight Evaluation Working Group FF flight forward FF flight-critical forward FF flip-flop FF forecasting funding FF forward fuselage FF free flight FF free flyer FF full field FF full functional FFBD functional flow block diagram FFC final flight certification FFC first-flight capability FFD fixed-format display FFD functional flow diagram FFF final factory functional FFM free-flying (experiment) module FFP firm fixed price FFP firmed fixed price FFR flight feasibility review FFRR first flight readiness review FFSAC field functional systems assembly and checkout FFT factory functional test FFT fast Fourier transform FFT frame format table FFTO free-flying teleoperator FH flex hose FHC flight half-coupling FHD fixed-head disk FHF first horizontal flight FHO failed hardover FHP fuel high pressure FHS forward heat shield FHST fixed-head star tracker FI fault identification FI fault isolation FI field intensity FI formal inspection FIA flight integration assessment FIAB Flight Integration Assessment Board FIAR failure investigation action report FICA Federal Insurance Contribution Act FID flight implementation directive FIE flight instrumentation engineer FIFO first in/first out (high-speed data buffer) FIIG federal item identification guide FIIN federal item identification number FIIWG Facility Integration and Installation Working Group FILE feature identification and location equipment FIM field instruction memorandum FIMS framework for integrated manufacturing system FIO furnished and installed by others FIR fuel indicator reading FIRSSE Far Infrared Sky Survey Experiment FIS facility interface sheet FISA facility inspection shakedown acceptance FIST final integrated system test FIST functional integrated system test FIT fault isolation test FITH fire in the hole FIV fuel isolation valve FKB flight display keyboard FL feed line FL flow line FL forward link FLAG flexible assignment generator FLAGE Flexible Lightweight Agile Guided Experiment FLAIR functional language articulated interactive resource FLAPS flight application software FLC Federal Library Committee FLC forward load control FLCA forward load controller assembly FLIR forward-looking infrared FLLK frustum-lifting lug kit FLPS flight load planning system FLR flight log recorder FLSA Fair Labor Standards Act FLSC flexible linear-shaped charge FLTSATCOM fleet satellite communications FLW Fellows (TACAN station) FM first mold FM flight model FM fluid module FM fracture mechanics FM frequency modulated FM frequency modulation FM/CW frequency-modulated continuous wave FM/FM frequency modulation/frequency multiplexing FM/PM frequency modulation/phase modulation FMA failure mode analysis FMAD fluid management and distribution FMAHTS flight manifest and hardware tracking system FMAR final mission analysis review FMC forward motor controller FMCA forward motor controller assembly FMCF first manned captive flight FMCS Federal Mediation and Conciliation Services FMD fixed-module drive FMD&C flight mechanics, dynamics, and control FMDM flexible multiplexer/demultiplexer FMEA failure mode and effects analysis FMEC forward master events controller FMECA failure modes and effects criticality analysis FMECA failure modes, effects, and criticality analysis FMK field modification kit FML fault message line FML final materials list FMO flight medical officer FMOF first manned operational flight FMOF first manned orbital flight FMOFEV first manned orbital flight with EVA FMOFPL first manned orbital flight with payload FMP facility management plan FMPAC fixed multipurpose application console FMR field modification request FMR function max rate FMS fluid management system FMS food management subsystem FMS forms management system FMS functional master schedule FMSP FM signal processor FMSP frequency modulation signal processor FMT flight management team FMX FM transmitter FND facility need date FNOC Fleet Numeric Oceanography Center (U.S. Navy) FNOC Fleet Numerical Oceanography Center FNT failure notification Telex FO fail operating FO fail operational FO fast operating FO fiber-optic FO flat oval FO functional objective FO-FO-FS fail operational/fail operational/fail safe FO-FS fail operational/fail safe FOB Flight Operations Building FOB fractional orbit bombardment FOB free on board FOBS fractional orbit bombing system FOC fleet operational capability FOC full operational capability FOCR final operational concept review FOD Flight Operations Directorate (JSC) FODS fiber-optic demonstration system FOE flight operations engineer FOF first operational flight FOF first orbital flight FOF flight operations facility FOG fiber-optic gyro FOGM fiber-optic guided missile FOH first-order hold FOI field operations installation FOIH Flight Operations Integration Handbook FOM field operations memorandum FOM figure of merit FOMR Flight Operations Management Room FOP facility operations plan FOP Flight Operations Panel FOP flight operations plan FOP follow-on production FOPG Flight Operations Planning Group FOPP follow-on parts production FOPS flight operations planning schedule FOPSS flight operation product scheduling system FOR field of regard FOR flight operations review FORD flight operations requirement document FORTRAN formula translation FOS flight operation security FOS flight operations support FOSA Flight Operations Support Annex FOSDIC film optical sensing device for input to computers FOSMS facility operation scheduling and monitoring system FOSO flight operations scheduling officer FOSP flight operations support personnel FOST flight operations support team FOT flight operation trainer FOT flight operations team FOV field of view FOV field of vision FOV first orbital vehicle FOWG Flight Operations Working Group FP fine pointer FP fuel pressure FP function path FP functional path FP fine pointing FP fixed point FP fixed price FP flat panel FP flexible processor FP flight plan FP focal plane FP freezing point FPA focal plane array FPA focal plane assembly FPB fuel preburner FPBOV fuel preburner and oxidizer valve FPC Federal Power Commission FPC fixed-price contractor FPC forward power controller FPCA forward power controller assembly FPDE focal plane drive electronics FPE functional program element FPEG fast-pulse electron gun FPH Flight Procedures Handbook FPI fixed-price incentive FPI fuel pressure indicator FPIF fixed-price incentive fee FPIT field preinstallation test FPL fetch pointer list FPL full power load FPO Future Projects Office (MSFC) FPOV fuel preburner oxidizer valve FPP floating-point processor FPP Freon pump package FPPR fixed price with price revision FPQ fixed, special-purpose radar FPR flight performance reserve FPRV flight product requirements verification FPSP focal plane signal processor FPSR flight planning and stowage review FPSS fine-pointing sun sensor FPU floating-point unit FPV flow proportioning valve FPWG FSD Planning Working Group FQ flight qualification FQF first qualification flight FQI flight qualification instrumentation FQR final qualification review FQR flight qualification recorder FQR formal qualification review FQT formal qualification test FR fast release FR final review FR firing room FR flight rule FR force-reflective FR frame rate FR fully reusable FRACAS failure reporting, analysis, and corrective action FRAGNET fragmented network FRB Failure Review Board FRC fixed radio control FRC flight readiness certification FRCB Flight Rules Change Board FRCB Flight Rules Control Board FRCI fibrous refractory composite insulation FRCS forward reaction control system (subsystem) FRD flight requirements document FRD functional requirements document FRDI flight research and development instrumentation FRDR flight readiness design review FRE flight-related element FRE format request element FRF flight readiness firing FRFT flight readiness firing test FRG Federal Republic of Germany FRJD forward reaction jet driver FRL frame reference line FRL fuselage reference line FRM facility requirements manager FRP fuselage reference plane FRR flight readiness review FRRID flight readiness review item disposition FRSI felt reusable surface insulation FRT flight readiness test FRT frequency response test FS factor of safety FS Freon servicer FS full scale FS functional schematic FS fuselage station FS fail safe FS fail to sync FS fault summary FS federal specification FS fire suppression FS fixed silo FS flight system FS fluid system FS3 Future Security Strategy Study FSA final-stage acceptance FSA frequency standard assembly FSAA flight simulator for advanced aircraft FSC Fairchild Space Company FSC federal stock classification FSCM federal supply code for manufacturers FSCP fire sensor control panel FSCP flight support computer program FSD Flight Simulation Division (JSC) FSD full-scale development FSD&P flight systems design and performance FSDU frequency synthesizer and distribution unit FSE factory support equipment FSE flight simulation engineer FSE flight support equipment FSED full-scale engineering development FSF first static firing FSGS flare/shallow glide slope FSH fixed superhard FSI final systems installation FSI flight software integration FSIM functional simulator FSIWG Flight System Interface Working Group FSK frequency shift key FSL Flight Simulation Laboratory FSL Flight Systems Laboratories FSLP first Spacelab payload FSLT first sea-level test FSM Firmware Support Manual FSM fuel supply module FSN federal stock number FSO facility security officer FSO functional supplementary objective FSP fault summary page FSP flight safety plan FSPL free-space-path loss FSR final system release FSR final systems review FSR Flight Support Room FSR flight support request FSRR flight software readiness review FSRR flight system readiness review FSRS flight system recording system FSS field spectrometer system FSS fire suppression system FSS fixed service structure FSS flight support station FSS flight support structure FSS flight support system FSS flight systems simulator FSS frequency selective surface FSS full-scale station FSSE flight sensor stimuli equipment FSSR flight system software request FSSR flight system software requirements FSSR functional subsystem software requirements FSSS Future Strategic Systems Study FSTE factory special test equipment FSTS frequency standard test set FSU facility security office FSU factor of safety ultimate FSU Freon servicing unit FSU frequency synthesizer unit FSV flight space vehicle FSW flight software FSY factor of safety yield FT fast track FT fault tolerant FT feed-through FT fine tracker FT flight team FT flight test FT formal training FT functional test FT&C formal training and certification FTA fatigue test article FTA fault-tree analysis FTA flight test article FTAM file transfer, access, and management FTC flight test conductor FTC Florida Test Center (MDAC) FTD flight test directive FTD Foreign Technology Division, U.S. Air Force FTE factory test equipment FTE flight test engineer FTE forced test end FTFD field test force director (AFSCF) FTIR Fourier transform infrared FTIS flight test instrumentation system FTMC fault-tolerant memory control FTO flight test objective FTO Foreign Technology Office FTO functional test objective FTOH Flight Test Operations Handbook FTP flight test procedure FTP full-throttle position FTP functional test program FTP functional test progress FTPF Flight and Training Planning Facility FTR flight test requirement FTR functional test requirement FTRD flight test requirements document FTRD functional test requirements document FTS far-term study FTS far-term system FTS federal telecommunications system FTS flight telerobotic service FTS flight telerobotic servicer FTS flight termination system FTS flight test station FTS flight test system FTS functional test specification FTT field test telescope FTVE functional technology validation experiment FU flight unit FUB forward utility bridge FUI federal unemployment insurance FUO follow-up output FUT flight unit test FV flight version FV front view FV incremental change in velocity FVDS fuel vent and drain system FVF first vertical flight FVSS fuel vapor scrubber system FVV facility verification vehicle FW flag word FW fuel wasting FWB Fahrenheit wet bulb FWC filament-wound case FWG Facility Working Group FWW food, water, and waste FWWM food, water, and waste management FWWMS food, water, and waste management subsystem FXR flash X-ray FY fiscal year G&A general and administrative G&C ground rules and constraints G&C guidance and control G&CEP guidance and control equipment performance G&CI guidance and control integration G&N guidance and navigation G&NS guidance and navigation system G-A ground to air G-G ground to ground G-II Gulfstream II (Shuttle training aircraft) G-MEM GPC memory G-V gravity-velocity G/A ground to air G/A/G ground to air to ground G/AIT ground/airborne IGS terminal G/C guidance and control G/E graphite-epoxy G/G ground to ground G/N general notes G/S glide slope G/T gain versus temperature G/T ratio of antenna gain to receiver noise temperature G/W gateway GA glide angle GA ground antenna GA gyro assembly GA&CS ground acquisition and command station GAC ground attitude control GAC Grumman Aerospace Corporation GACU ground air conditioning unit GACU ground avionics cooling unit GADG gravity or acceleration due to gravity GAEC Grumman Aircraft Engineering Corporation GAIN graphic aids for investigating networks GAO General Accounting Office GAP GOAL automatic procedure GAPL group assembly parts list GAS getaway special GASD Government Aerospace Systems Division (Harris Corporation) GASP General Ascent Trajectory and Sizing Program GASPI gimbal angle, surface position indicator GATE generic automatic test equipment GATP ground acceptance test procedure GATP ground article test procedure GATT gate-assisted turnoff thyristor GAX GN&C annunciation interface GBD global burst detector GBD Government Business Division GBI Grand Bahama Island GBL government bill of lading GBL ground-based laser GBOTV ground-based OTV GBR glass bead rating GBR ground-based radar GBS ground-based software GBSS ground-based surveillance system GBT gyro bias calibration value GC gas chromatography GC gyrocompass GC gigacycle (1,000 megacycles) GC gimbal case GC ground computer GC ground contact GC ground control GC ground controller GC guidance computer GC guidance control GCA ground-controlled approach GCA guidance coupler assembly GCC ground communications coordinator GCC Ground Control Center GCCC Ground Control Computer Center GCCO ground control checkout GCD greatest common divisor GCD gyrocompass, desired cluster orientation GCDC ground checkout display and control GCDS ground checkout display and control system GCE GPS cargo element GCF greatest common factor GCF ground communications facility GCHX ground cooling heat exchanger GCI ground-controlled interception GCID ground computer interface device GCIL ground command interface logic GCIL ground control interface logic GCILC ground command interface logic controller GCILU ground control interface logic unit GCL ground control landing GCL ground coolant loop GCN GIRD change notice GCN ground communications network (A/G worldwide net) GCN ground control network GCO ground checkout GCOS general computer operational system GCOS ground computer operating system GCP ground command post GCP group command post GCR ground-controlled radar GCR group-coded recording GCS ground communications system GCS ground control station GCS guidance cutoff signal GCTS gas component test stand GCTS ground communication tracking system GCU general control unit GCU generator control (regulator) unit GCU ground cooling unit GCU gyro coupling unit GDA General Dynamics Astronautics GDA gimbal drive actuator GDA gimbal drive assembly GDBS generalized data base system GDC General Dynamics Corporation GDC gyro display coupler GDCA General Dynamics Convair Aircraft GDDM graphical data display manager GDMS generic data management system GDMS ground data management system GDOP geometric dilution of precision GDP generalized documentation processor GDR geophysical data record GDS Goldstone, California (STDN) GDSD Ground Data Systems Division GDSM ground data systems manager GDSO ground data systems officer GDSSR GDSD staff support room GE General Electric GE-AESD General Electric Aerospace Electronics Systems GE/B General Electric Burroughs GEA gimbal electronics assembly GEC General Electrodynamics Corporation GEDAC General Electric detection and automatic correction GEM generic electronics module GEMS general energy management system GEMS global emergency missile surveillance GEO geosynchronous Earth orbit GEODSS ground-based electro-optical deep-space surveillance GEOMOD geometric modeler GEOPAUSE geodetic satellite in polar geosynchronous orbit GEOSEPS geosynchronous solar electric propulsion stage GERT graphical evaluation and review technique GESS Goddard experiment support system GET ground elapsed time GETI ground elapsed time of ignition GETL ground elapsed time of landing (for TIG of abort burn) GETS ground equipment test set GF gauge factor GF government-furnished GF&P gases, fluids, and propellants GFAE government-furnished aeronautical equipment GFAE government-furnished aircraft equipment GFD government-furnished data GFE government-furnished equipment GFERD government-furnished equipment requirement description GFI government-furnished information GFI ground fault interrupter GFM government-furnished material GFP generalized filter program GFP government-furnished property GFRP glass-fiber-reinforced plastic GFRP graphite-fiber-reinforced plastic GFS government-furnished software GFTM generic fluids transfer model GFY government fiscal year GG gas generator GG gravity gradient GGVM gas generator valve module GHA general housekeeping area GHA Greenwich hour angle GHC ground half-coupling GHE ground handling equipment GHX ground heat exchanger GHe gaseous helium GHz gigahertz GIA general-purpose computer interface adapter GIAG Government-Industry Advisory Group GIBIS graphical issue-based information system GIC GPC interface console GIDD GSE interface definition document GIDEP government interagency data exchange program GIDEP government-industry data exchange program GIDS general-purpose interactive display system GIE ground instrumentation equipment GIF graphics interchange format GIM generalized information management GIMADS generic integrated maintenance and diagnostic system GIMADS generic integrated maintenance diagnostics GIRD ground integration requirements document GISO general industry safety order GITG Ground Interface Technical Group GIWG Ground Interface Working Group GKS graphics kernel system GLAADS gun low-altitude air defense system GLC generator line contractor GLCM ground-launched cruise missile GLLD ground locator laser designator GLOW gross lift-off weight GLOW ground lift-off weight GLP GOAL language processor GLS ground launch sequencer GM gaseous mixture GM geometric mean GM ground mobile GMAL General Electric Macro Assembly Language GMAW gas metal arc welding GMCC Ground Mobile Control Center GMCL ground measurements command list GME gimbal module electronics GMEM GPC memory GMF ground module force GMIL KSC STDN station GMIP government mandatory inspection point GMIS ground STDN management information system GMIS GSSC management information system GML general measurement loop GMLCC Ground Mobile Launch Control Center GMM geometrical math model GMN Gorman (TACAN station) GMT Greenwich mean time GN ground network GN&C guidance, navigation, and control GN&CS guidance, navigation, and control subsystem GNC guidance and navigation computer GNC guidance, navigation, and control GNCFTS GN&C flight test station GNCIS GN&C integration simulator GNCS guidance and navigation control system GNCSIM GN&C simulation GNCTS GN&C test station GNE guidance and navigational electronics GNIC G&N indicator control GNP gross national product GNS guidance and navigation simulator GNS guidance navigation system GO general order GOAL ground operations aerospace language GOASEX Gulf of Alaska Seasat Experiment GOC ground operations coordinator GOCA ground operations control area GOCO government-owned, contractor-operated GOE ground operating equipment GOE ground outfitting equipment GOES geostationary operational environment satellite GOES geosynchronous operational environmental satellite GOM KSC ground operations manager at DFRF or WSMR GOMMS ground operations and material management system GOMS ground operations management system GOP Ground Operations Panel GOP ground operations plan GOPG Ground Operations Planning Group GOR ground operations review GORD ground operations requirements document GORP Ground Operations Review Panel GORP ground operations requirements plan GORR ground operation readiness review GORS ground observer RF system GOS ground operations system GOSP ground operational support plan GOSRP ground operational support requirements plan GOSS ground operational support system GOTS government off the shelf GOWG Ground Operations Working Group GP general publication (KSC) GP general-purpose GP government property GPA general-purpose amplifier GPAS general-purpose airborne simulator GPBIM general-purpose buffer interface module GPC gel permeation chromatograph GPC gel permeation chromatography GPC general-purpose computer GPC gyro pulse count GPCB GOAL program control block GPCIPL general-purpose computer initial program load GPD gimbal position display GPI gimbal position indicator GPI ground position indicator GPIO general-purpose input and output GPL general-purpose laboratory GPL GOAL processing language GPME general-purpose mission equipment GPNDS global positioning and nuclear detection system GPO Government Printing Office GPRN GOAL test procedure release notice GPRP government production research property GPS general processing subsystem GPS Global Positioning System (Navstar) GPS ground power supply GPS ground processing simulation GPS RX GPS user receiver GPSCP GPS computer program GPSS general-purpose simulator system GPSS general-purpose system simulator GPTE general-purpose test equipment GPU ground power unit GPUR GOAL test procedure update request GPVS general-purpose visual simulator GR ground rule GRACE ground radar calibration equipment GRC Glenn Research Center GRD ground detector GRE Gamma Ray Explorer GRID graphic retrieval and information display GRNC group not counted GRO Gamma Ray Observatory GRS global receiving system GRTLS glide return to launch site GS gas servicer GS generalized system GS glide slope GS ground speed GS ground station GS ground system GS II Generalized System II GSA General Services Administration GSAT geosynchronous satellite GSCU ground service cooling unit GSDL Ground Software Development Laboratory GSDS Goldstone duplicate standard (standard DSIF equipment) GSE government support equipment GSE ground servicing equipment GSE ground support equipment GSE&I general systems engineering and integration GSEL ground support equipment list GSERD ground support equipment recommendation data GSF gyro scale factor GSFC Goddard Space Flight Center GSI glide slope indicator GSI government source inspection GSIG Ground Systems Integration Group GSIU ground standard interface unit GSLS ground station link survivability GSO Ground Support Office GSO ground support operations GSO ground systems operations GSP ground safety plan GSP-R guidance signal processor-repeater GSPF Ground Software Production Facility (LPS) (FR 2 KSC) GSPO Ground Systems Project Office (JSC) GSR galvanic skin response GSS geosynchronous space station GSS government systems sector GSS ground support software GSS ground support system GSSC General Systems Simulation Center (NASA) GSSC ground support simulation computer GSSF general service stock fund GSSI ground support system integration GSSI&C ground support systems installation and checkout GSSI&C group support systems integration and checkout GST ground system test GSTAR Saudi Arabian communications satellite GSTDN ground space flight tracking and data network GSTDN ground spacecraft tracking and data network GSTP ground system test procedure GSTS ground-based surveillance and tracking system GSTS/BM ground-based surveillance and tracking sagement GSU gas servicer unit GSV glove stop valve GSVOO ground station visibility of orbiting objects GSVP ground support verification plan GT ground team GT ground test GT gyro torque GT&A ground test and acceptance GTA gas tungsten arc GTA ground test access GTA ground test article GTA ground test assembly GTA ground torquing assembly GTAW gas tungsten arc welding GTC glycol trim console GTC ground test conductor GTCU ground thermal conditioning unit GTE General Telephone and Electronics GTF ground test facility GTI Grand Turk Island GTI ground test instrumentation GTLV government-furnished target launch vehicle GTM ground team manager GTM ground test missile GTM ground test motor GTO generic technical order GTO geosynchronous transfer orbit GTP general test plan GTRI Georgia Tech Research Institute GTS general test support GTS GN&C test station GTS GNS test station GTS guidance test station GTT group technology time GTU glycol trim unit GTV ground test vehicle GTV ground transport vehicle GTVI gimbal angle and translational velocity indicator GUCP ground umbilical carrier plate GUIDO guidance officer GUL GSE utilization list GUSB guided, unified S-band GVL Ground Vibrations Laboratory GVO Gaviota (TACAN station) GVSC generic VHSIC spacecraft computer GVT ground vibration test GVTA ground vibration test article GW gateway GW gross weight GWA general work area GWM Guam (STDN) GWT ground winds tower GYM Guaymas, Mexico (remote site) GaAs gallium arsenide GeV giga electron volt Gr/Al graphite-aluminum Gr/Ep graphite-epoxy H altitude H altitude rate H hazardous (task classification) H henry (SI unit) H momentum H&D hardened and dispersed H&K homing and kill H-CITE horizontal cargo integration test equipment H-S Hamilton Standard H-S horizon scanner H-S horizon sensor H/A hazardous area H/B hyperbaric H/C head count H/E heat exchanger H/F human factor H/L hardline H/O handover H/S heat shield H/SIR hardware and software integration review H/X heat exchanger H2O2 hydrogen peroxide H2S hydrogen sulfide HA apogee altitude HA hazard analysis HA high altitude HA higher authority HAA high-altitude abort HAADS high-altitude attitude determination system HAARS high-altitude attitude reference system HAB high-altitude burst HABP Hypersonic Arbitrary Body Program HAC heading alignment circle HAC heading alignment cylinder HAC Hughes Aircraft Company HAD heat-actuated device HAFB Hill Air Force Base HAFB Holloman Air Force Base HAINS high-accuracy inertial navigation system HAK horizontal access kit HAL high-order articulated language HAL high-order assembly language HAL Houston aerospace language HAL/S high-order assembly language for Shuttle HAL/S high-order programming language for Spacelab usage HALO high-altitude large optics HAM height adjustment maneuver HAMP handling and moving procedure HANE high-altitude nuclear explosion HAP Hardware Allocation Panel HAP high-speed arithmetic processor HAP Honeywell array processor HAR hazard analysis report HAS high-altitude sensor HAS hold-down alignment support HAS hydraulic actuation system HASC high-altitude surveillance concept HAST high-altitude supersonic target HAW Hawaii (STDN) HB half-breadth HB handbook HB high bay HB hyperbaric HBBW half-beam bandwidth HBR high bit rate HBT Heflex bioengineering test HBW hot bridge wire HC hand control HC head count HC high carbon HC hybrid computer HCCB Hardware Configuration Control Board HCDB historical cost data base HCF high-cycle fatigue HCF HIM configuration file HCI hardness-critical item HCM hard-copy module HCMM heat capacity mapping mission HCP hydraulic circulation pump HCR high cross range HCRB Hardware Configuration Review Board HCS high-carbon steel HCSHT high-carbon steel heat-treated HCSL Hybrid Computation and Simulation Laboratory HCU hydraulic charging unit HCV helium check valve HCl hydrogen chloride HD hand-drawn HD heavy duty HD highly desirable HD hold-down HD horizontal drain HD hydrogen drain HDA hardware disposition area HDA housekeeping data acquisition HDC Hasselblad data camera HDDR high-density digital recorder HDI Human Development Institute HDP hold-down post HDR high data rate HDRA high-data-rate assembly HDRM high-data-rate multiplexer HDRR high-data-rate recorder HDRS high-data-rate system HDRSS high-data-rate storage system HDS hardware description sheet HDS hydrogen disposal system HDTV high-definition television HDX half-duplex HE hardware evaluation HE hardware evaluator HE heat exchange HE heat exchanger HE high explosive HE high explosive on target HE high-energy astrophysics HE human engineering HEAO High-Energy Astronomy Observatory HEAP high-energy aimpoint HEDI high endoatmospheric defense interceptor HEDS high endo designation sensor HEDSIM high endo simulation HEDSIM high endoatmospheric defense system simulator HEDSIM high endoatmospheric event-based simulation HEL high-energy laser HELCUSS high-energy laser computerized unmanned space HELF high-energy laser fluence HEM hitchhike experiment module HEMIL hardware evaluator, man in loop HEO high Earth orbit HEO high-energy orbit HEOO Honeywell Electro-Optical Operations HEOR historical event operation record HEOS high endo designator sensor HEPA high-efficiency particle accumulator HEPA high-efficiency particle air HER HIM equipment rack HERSCP hazardous exposure reduction and safety criteria plan HERT Headquarters Emergency Relocation Team HESS high-energy squib simulator HEXAD developmental 6-axis IMU HF hard failure HF high frequency HF horizontal flight HF hot firing HF hydrogen fill HF hydrogen fluoride HF/DF hydrogen fluoride/deuterium fluoride HFA high-frequency accelerometer HFC heat flow and convection HFC hydraulic flight control HFCL Hydraulic Flight Control Laboratory HFCT hydraulic flight control test HFCV helium flow control valve HFCW hydrogen fluoride continuous wave HFDP human factors development plan HFDS hydrogen fluid distribution system HFE high-frequency executive HFE human factors engineering HFMP human factors management plan HFMU high-fidelity mockup HFO high-frequency oscillator HFP hardened focal plane HFRA high-frequency recovery antenna HFRW high-frequency resistance welding HFS high-fidelity simulator HFS horizontal flight simulator HFS hyperfine structure HFT horizontal flight test HFTE human factors test and engineering HFTF horizontal flight test facility HFTS horizontal flight test simulator HFX high-frequency transceiver HG high gain HGA high-gain antenna HGAS high-gain antenna system HGDS hazardous gas detection system HGM hot-gas manifold HGS hydrogen gas saver HGV hydrogen gas valve HGVT horizontal ground vibration test HH handhold HHMU hand-held maneuvering unit HI Honeywell, Incorporated HIAD Handbook of Information for Aircraft Designers HIAD High-Altitude Defense Program HIBREL high-brightness relay HIC hardware integration contractor HICAMP Highly Calibrated Airborne Measurements Program HID hardware interface device HID HIM interface distributor HIGED Handbook of Instructions for Ground Equipment Designers HIL hardware in loop HIL human in the loop HILS hardware-in-the-loop simulation HIM hardware interface module HIP hardware interface panel HIP hardware interface processor HIP hardware interface program HIP hot isostatic press HIPO hierarchical input-process output HIPO hierarchy plus input, process, and output HITS hierarchical integrated test simulator HITS high-rate multiplexer input and output test system HIU headset interface unit HIV helium isolation valve HK housekeeping HKV hit-to-kill vehicle HL hard line HL heel line HL high level HL hinge line HL hydrogen line HLAL high-level assembler language HLC hybrid load controller HLCM high-level control module HLLV heavy-lift launch vehicle HLTL high-level test language HM hinge mount HMA hypergolic maintenance area HMB hard mobile basing HMC hybrid microcircuit HMCF hypergolic maintenance and checkout facility HMD head-mounted device HMD helmet-mounted display HMF health maintenance facility HMF horizontal mating facility HMF hypergolic maintenance facility (KSC) HML hard mobile launcher HML hardened mobile launcher HMO health maintenance organization HMP hydrazine monopropellant (RCS propellant) HMPAC helmet-mounted multipurpose applications control HMS hazard monitor system HMS health monitoring system HMS history memory system HMTT Hurricane Mesa Test Track HMU hardware mockup HMV hydrogen manual valve HNCO high-precision numerical-controlled oscillator HO hydrogen-oxygen HOE homing optical experiment HOE homing overlay experiment HOFCO horizontal functional checkout HOL high-order language HOL higher order language HOLAB holographic laboratory brassboard HOLC high-order language computer HOS high-order software HOS hybrid operating system HOSC Huntsville Operations Support Center HOST hardened optical sensor test bed HOW handover word HP handling procedure HP Hewlett-Packard HP high pass HP high pressure HP horsepower HP hydrogen purge HP perigee altitude HP pressure altitude HPA handling and positioning aid HPA high-power amplifier HPA high-power antenna HPAU high-power amplifier unit HPBRM high payload baseline reference mission HPBW half-power beam width HPC corrected pressure altitude HPF highest probable frequency HPF Horizontal Processing Facility HPFT high-pressure fuel turbopump HPFTP high-pressure fuel turbopump HPG high-pressure gas HPGS high-pressure gas system HPI high-performance insulation HPICS heat pipe instrumentation and control system HPM Harvard Project Manager HPM high-performance motor HPM high-power microwave HPOL High-Power Optics Laboratory HPOP high-pressure oxidizer pump HPOT high-pressure oxidizer turbopump HPOTP high-pressure oxidizer turbopump HPPF Horizontal Payloads Processing Facility HPR hydrogen pressure regulator HPRV hydrogen pressure relief valve HPS hydraulic power system HPT high-pressure test HPU high-power unit HPU hydraulic power unit HPU hydraulic propulsion unit HPU uncorrected pressure altitude HPV high-pressure valve HQ headquarters HQR handling qualities rating (Cooper-Harper) HR heat-resistant HR historical record HR hydrogen relief HR&T heat rejection and transport HRAA high-rate acquisition assembly HRC Hasselblad reflex camera HRD high-rate dosimeter HRDA high-rate data assembly HRDM high-rate demultiplexer HRDR high-rate digital recorder HRE hardware reuse evaluation HRG hemispherical resonating gyro HRIR high-resolution infrared radiometer HRL horizontal reference line HRM hand-held radiation meter HRM high-rate multiplexer HRMA high-resolution mirror assembly HRPS hazard reduction precedence sequence HRSI high-temperature reusable surface insulation HRSO high-resolution solar observatory HRTS HR&T system HS hard silo HS heat shield HS heat suppression HS high speed HS horizon sensor HS hot short HS hydrogen sulfide HSA heat shield abort HSB heat shield boost HSC hardware and software coordination HSC hierarchical storage controller HSC house spacecraft HSCS high-speed communications subsystem HSCU hydraulic supply and checkout unit HSD Hamilton Standard Division HSD high-speed data HSD high-speed device HSD horizontal situation display HSDL high-speed data line HSE heat shield entry HSF Hypergolic Servicing Facility HSF Human Space Flight HSG high sustained g's (acceleration) HSG high-speed gear HSI horizontal situation indicator HSIG hermetically sealed integrating gyroscope HSK horizontal sling kit HSL Hardware Simulation Laboratory HSP high-speed printer HSR hardware status register HSR heat-shield recovery HSR high speed reader HSRV heat-source reentry vehicle HSS high stress/strain HSSM hardened space sensor model HST Hubble Space Telescope HSTF Hypergolic System Test Facility HSU helium service unit HSV hypersonic vehicle HT Hadamard transform HT heat transfer HT heat treatment HT heat-treat HT high technology HTC high-temperature carbon HTC hybrid technology computer HTE hazardous top-level event HTLL high-test-level language HTM high-throughput mission HTO horizontal takeoff HTP hydroxyl terminated propellant HTPB hydroxyl terminator polybutadiene HTPB hydroxyl terminated polybutylene HTS Hawaii tracking station HTS heat transfer system HTS heat transport section HUD head-up display HUL hardware utilization list HULL hardware utilization and location list HUT hard upper torso HV high velocity HV high voltage HV hydrogen vent HVAC heating, ventilation, and air conditioning HVDS hazardous vapor detection system HVE high-voltage electronics HVI high-velocity impact HVM hydraulic valve module HVM hypervelocity missile HVPS high-voltage power supply HVSF Honeywell Verification Simulation Facility HVSL holidays, vacation, and sick leave HW half word HW hardware HW head wind HW heavyweight HW hot wire HW/SW hardware/software HWCI hardware configuration item HWIL hardware in loop HWT hypersonic wind tunnel HX heat exchanger HYDAC hybrid digital-analog computer HYPACE hybrid programmable attitude control electronics HYSAT hybrid satellite HYSAT hybrid sensor experimental satellite HeG helium gauge HeGV helium gauge valve HeMV helium manual valve HgCdTe mercury-cadmium-telluride HiRAP high-resolution accelerometer package Hz hertz (cycles per second) I in phase I inertia I integer valve I irradiated I&C installation and checkout I&C instrumentation and communication I&C integration and checkout I&C/O installation and checkout I&ES information and electronics system I&O inlet and outlet I&Q in phase and quadrature I&R inspect and review I&R interchangeability and replaceability I&RS instrumentation and range safety I&S interchangeability and substitutability I&T integration and test I-load initial load I-load initialization load I/C intercom I/F interface I/FU interface unit I/O input/output I/OB input/output bus I/OC input/output controller I/OMI integration, operations, and maintenance instruction I/OP inboard/outboard profile I/OT input/output test I/OU input/output unit I/P impact predictor I/P in progress I/Q in phase/quadrature I/S installation of systems I/T intertank I/U instrumentation unit I/V inlet valve I/W in work I3L isoplanar integrated injection logic IA implementation agency IA input axis IA interface agreement IA inverter assembly IA issuing agency IA&T integration, assembly, and test IAA International Aerospace Abstracts IAB IUS Assembly Building IACO installation, assembly, and checkout IACS inertial attitude control system IAD interface agreement document IAD interface analysis document IAF interactive facility IAH interface attachment hardware IAL immediate action letter IAL international algebraic language IAM information asset management IAM International Association of Machinists IAN institutional area network IAPU improved auxiliary power unit IAS impact assessment sheet IAS indicated airspeed IAS Institute of Aeronautical Sciences IAS integrated avionics subsystem IASS inverter/ATCS support structure IAT integrated avionics test IAV inventory adjustment voucher IAW in accordance with IB inboard IB inert building IB inner button IB instruction book IBC impurity-band conductor IBEW International Brotherhood of Electrical Workers IBF internally blown flap IBM International Business Machines IBR implementation baseline review IBSS Infrared Background Signature Survey IBT International Brotherhood of Teamsters IC incremental cost IC intercomputer communication IC interim change IC internal combustion IC IOC chamber IC inertial component IC information center IC initial condition IC integrated circuit IC integration cell IC intercom IC intercommunications IC intercomputer IC/ES intercommunication/emergency station ICA intelligent communicating agent ICA interim change analysis ICA item change analysis ICAAD interactive computer-aided analysis and design ICAI intelligent CAI ICAM integrated computer-aided manufacturing ICAO International Civil Aviation Organization ICAPC increased-capability adaptive payload carrier ICAR initiated corrective action report ICAR investigation and corrective action report ICB interim change bulletin ICB interrupt control block ICBC IMAX cargo bay camera ICBM intercontinental ballistic missile ICC intercomputer channel ICC intercomputer communication ICC interface control chart ICC interface control contractor ICC Interstate Commerce Commission ICCD intensified CCD ICCP interface coordination and control procedure ICCWG Intercenter Communication Working Group ICD interface control document ICD interface control documentation ICD interface control drawing ICDR incremental critical design review ICDS interface control document schedule ICDU inertial coupling data unit ICE input control element ICE instrument checkout equipment ICE instrument/communication equipment ICE instrumentation/communication equipment ICF interface control function ICG in-flight coverall garment ICHA integrated cargo hazard assessment ICI interim configuration inspection ICL interface control layout ICM instrumentation and communication monitor ICM integrated cost module ICMS indirect cost management system ICMT intercontract material transfer ICN intercomputer network ICN interface change notice ICO integrated checkout ICO integrated-communication officer ICP ICS control program ICP indicator control panel ICP interface change proposal ICP interface control panel ICP inventory control point ICR inductance, capacitance, and resistance ICR instruction change request ICR interface compatibility record ICRB Interface Change Review Board ICRP International Council on Radiation Protection ICS instrumentation control system ICS intercommunication system ICS interface control specification ICS interphone control station ICS interpretive computer simulator ICSU International Council of Scientific Unions ICT influence coefficient test ICT interface control tooling ICTC inertial component temperature controller ICTE inertial component test equipment ICU in-flight calibration unit ICU interface control unit ICW interrupted continuous wave ICWG Interface Control Working Group ID identification ID identification data ID inside diameter ID integrated diagnostic ID interactive discrimination ID interface device ID interface document ID&C integrated displays and controls ID&CA inverter distribution and control assembly ID&CS ID&C subsystem ID&D inspection damage and discrepancy IDA integrated display assembly IDA interface definition agreement IDA intermediate data array IDAC integrated digital-analog converter IDAR interim data assessment review IDAS integrated data acquisition system IDB in-suit drink bag IDBMS integrated data base management system IDC IMBLMS digital computer IDC integrated displays and controls IDC interface document control IDCA inverter distribution and control assembly IDCP interdivision change proposal IDD IGS data denial IDD integrated data denial IDD interface definition document IDD interface description document IDD interface design document IDE initial design evaluation IDE integrated design environment IDE interactive development environment IDEAS initial design and evaluation analysis system IDEAS2 independent design and evaluation of advanced spacecraft IDEF ICAM definition IDEP interservice data exchange program IDG integrated drive generator IDI instrumentation data item IDL indentured drawing list IDMM Intermediate and Depot Maintenance Manual IDMRD intermediate and depot maintenance requirements document IDMRS intermediate depot maintenance requirements IDMS information and data management system IDO interdivisional operation IDOS integrated display operating system IDOT instrument digital on-line transcriber IDP I-load data pack IDP integrated data processing IDP interface digital processor IDR initial design review IDR interim data review IDR interim design review IDR interim discrepancy report IDR intermediate design review IDRA interdivision revision authorization IDRD information definition requirements document IDRD internal data requirement description IDS I-load data set IDS information data system IDS integrated defense simulator IDS integrated design support IDS integrated design system IDS integrated display system IDS interface data sheet IDS item description sheet IDSD Institutional Data System Division (JSC) IDSNET integrated defense simulator network IDSNET integrated defense system network IDSO interdivisional sales order IDSR initial design status review IDSR interdivisional support request IDSS integrated design support system IDSS integrated diagnostic support system IDT I-load data tape IDT image detector tube IDT image dissector tube IDTA interdivisional technical agreement IDU interface demonstration unit IDWA interdivisional work authorization IEA integrated electronic assembly IECM induced-environment contamination monitor IECO inboard engine cutoff IECS igloo environment control subsystem IED interacting equipment document IEEE International Electrical and Electronic Engineers IEEP incapacitated emergency egress practice IEF isoelectric focusing IEFT integrated experiment functional test IEIWG International Element Interface Working Group IEMC intrasystem electromagnetic compatibility IEMCAP Intrasystem Electromagnetic Compatibility Computer Analysis Program IES information extraction system IESD Instrumentation and Electronic Systems Division (JSC) IF integration facility IF interface IF intermediate frequency IF internal fault IF/FDM intermediate frequency/frequency division multiplexer IFA in-flight analysis IFA interface functional analysis IFASC Integrated Functions Assessment Steering Committee IFB invitation for bid IFCG Interface Control Group IFDL interfacility data link IFE industrial furnished equipment IFE isoelectric focusing experiment IFF identification, friend or foe IFFN identification, friend, foe, neutral IFM in-flight maintenance IFO Information Systems Office IFOT in-flight operations and training IFOV instantaneous field of view IFOV instrument field of view IFR instrument flight rule IFRU in-flight replaceable unit IFS impact and flotation system IFS integrated FEP simulator IFS integrated flight simulator IFS interface specification IFT in-flight test IFT interface tool IFTD interface terminal distributor IFTE intermediate forward test equipment IFTM in-flight test and maintenance IFTS in-flight test system IFU interface unit IG inertial guidance IG inner gimbal IG instrument ground IG instrumentation group IG internal guidance IGA inner gimbal angle IGAX inner gimbal axis IGC interactive gaming center IGDR interim GDR IGDR interior geophysical data record IGDS interactive graphic design system IGDS iodine generating and dispensing system IGE image generating equipment IGE instrumentation ground equipment IGES initial graphic exchange specification IGM interactive guidance mode IGM iterative guidance mode IGN&C integrated guidance, navigation, and control IGOR intercept ground optical recorder IGOS interactive graphic orbit system IGS inertial guidance system IGS intergimbal assembly IGS IONDS global segment IGSE in-space ground support equipment IGSE instrument ground support equipment IGV inlet guide valve IGV inlet guide vane IGY international geophysical year IH/SR integrated hardware/software review IHA interface hazard analysis IHP indicated horsepower IHSR integrated hardware/software review IHTV interim hypersonic test vehicle IHX interloop heat exchanger II implementing instruction IIOP in-orbit plane IIS inspection item sheet IIS interface identification sheet IISS integrated information support system IITCS igloo internal thermal control section IK inner keel IL internal letter ILA instrument landing approach ILAS instrument landing approach system ILC initial launch capability ILC International Latex Company ILCCS integrated launch checkout and control system ILMF intermediate-level maintenance facility ILO integrated logistics operations ILP Integrated Logistics Panel ILRV integral launch and reentry vehicle ILS instrument landing system ILS integrated logistics support ILS integrated logistics system ILS/LAR integrated logistics system and logistics a ILSA integrated logistics support analysis ILSC integrated logistics support concept ILSCP integrated logistics support concept plan ILSIM integration of lethality studies into model ILSMT Integrated Logistics Support Management Team ILSP integrated logistics support plan ILSSE integrated life science Shuttle experiment ILSWG Integrated Logistics Support Working Group ILT/RT imprecisely located target/relocatable target IM information memory IM infrastructure module IM integration management IM interface module IM intermediate moisture IM intermodulation IMADS information management assimilation and delivery system IMAS institutional management accounting system IMBLMS integrated medical/behavioral laboratory measurement IMC image motion compensation IMCC Integrated Mission Control Center IMCP integrated monitor and control panel IMCR integrated master control record IMDB integrated maintenance data base IMDS integrated monitoring and diagnostics system IMF inventory master file IMIC Integrated Management Information Center IMIC integrated management information computer IMIP Industrial Modernization Incentive Program IML inner mold line IML inside mold line IMLEO initial mass in low Earth orbit IMO Integration Management Office IMP inflatable micrometeoroid paraglider IMP information management plan IMP initial memory protection IMP interplanetary monitoring platform IMP inventory management plan IMPACT integrated material productivity action IMRB interim mission reconfiguration base IMRO inspection, modification, and repair order IMS information management system IMS inhibit main store IMS interplanetary monitor satellite IMS inventory management system IMSS in-flight medical supply system IMST integrated mission simulation test IMTF integrated manufacturing test facility IMU inertial measurement unit IMUGSE IMU ground support equipment IMUPLM inertial measurement unit prelaunch monitor IMW intelligent machining work station IN Information Systems Directorate (KSC) INBIT input bit INC installation notice card INC installation notification certificate INCO instrumentation and communication officer INDAT incoming data INITCO initialization and checkout INR inertial reference INS inertial navigation system INSAT India communications satellite INT integrated test INTASAT Instituto Nacional De Tecnica Aerospacial INTC/O integrated checkout INTELSAT International Telecommunications Satellite INTF interim national test facility (CSOC location) IO industral operations IOA input, output, or assembly IOA input/output adapter IOB input/output box IOB input/output buffer IOB input/output bus IOBPS input/output box and peripheral simulator IOC indirect operating cost IOC initial operational capability IOC input/output controller IOC integrated operations configuration IOC item of concern IOCP ITS on-board computer program IOCU input/output control unit IOD initial orbit determination IOE input/output error (log table) IOF initial operational flight IOHA integrated operating hazard analysis IOL interoffice letter IOM input/output module IONDS integrated operational nuclear detection system IONDS integrated operational nuclear detonation system IOP input/output part IOP input/output processor IOPL integrated open-problem list IOPT input/output parameter table IOQE input/output queue element IORL input/output requirements language IORTD input/output relationships and timing diagram IOS Indian Ocean ship IOS initial operational system IOS input/output supervisor IOS instructor operator station IOSC integrated operations support complex (VLS) IOT&E initial operational test and evaluation IOT&E integration operational test and evaluation IOU input/output unit IP identification of position IP instrumentation of pulse code modulation master unit IP interfacing processor IP intermediate pallet IP intermediate pressure IP iron pipe IP impact point IP in plant IP industrial preparedness IP inertial processing IP initial point IP instructor pilot IP instrument payload IP instrument processor IPA industrial preparedness action IPA intermediate-power amplifier IPACS integrated power and attitude control system IPAD integrated program for aerospace vehicle design IPAR irregular parts authorization request IPAS integrated problem assessment system IPB illuminated push button IPB illustrated parts breakdown IPC integrated procurement control IPC intermittent positive control IPCL instrument program and component list IPCL instrumentation program and components list IPD Information Processing Division IPDR incremental preliminary design review IPE industrial plant equipment IPF IUS Processing Facility IPL indentured parts list IPL initial program load IPLC initial program load complete IPLS initial program load start IPM integration program manager IPMS inertial performance measurement system IPP individual program plan IPP industrial preparedness plan IPPB illustrated provisioning parts breakdown IPR ice-point reference IPR in-process review IPR interim problem report IPS information processing system IPS instrument pointing system (subsystem) IPS instrumentation power system (subsystem) IPS integrated propulsion system IPS international pipe standard IPS inverter power supply IPS invoice processing system IPSL interface problem status log IPSS integrated parts statusing system IPSS integrated project scheduling system IPT in-plant transporter IPT internal parameter table IPT internal pipe thread IPT international pipe thread IPTCS igloo passive thermal control section IPTR in-process technical review IPWG Integrated Project Working Group IQSY international quiet sun year IQT initial qualification training IR inclination of the ascending return IR infrared IR inner roll IR inside radius IR interchangeability and replaceability IR international rendezvous IR interrogator-responder IR&D independent research and development IRAM input random access memory IRAMS inertial reference alignment monitor system IRAN inspection and repairs as necessary IRANSAT Iranian government communications satellite IRAS infrared astronomical satellite IRBM intermediate-range ballistic missile IRBS infrared background sensor IRBS intermediate-range ballistic system IRBS intermediate-range booster system IRCFE infrared communications flight experiment IRCS integrated resource control system IRD information requirements description IRD information requirements document IRD initiating reference document IRD integration requirements document IRD interface requirements document IRDS information resource dictionary system IRDTS ITS RF and digital test set IRE Institute of Radio Engineers IRG inertial rate gyro IRIG inertial rate integrating gyroscope IRIG inertial reference integrating gyroscope IRIG Interrange Instrumentation Group IRIS infrared instrumentation system IRIS Italian research interim stage IRL initiating reference list IRL interface requirements list IRM information resource management IRM integrated range mission IRME initiator resistance measuring equipment IRN interface revision notice IRN interim revision notice IRP inertial reference package IRR independent readiness review IRR initial requirements review IRR inspection rejection report IRR integral rocket ramjet IRR integrated readiness review IRR interface requirements review IRS interface requirements specification IRST infrared search track IRTCM integrated real-time contamination monitor IRU inertial reference unit IRU IVA replaceable unit IS installation support IS instrumentation system IS integrated satellite IS interconnecting station ISA inertial sensor assembly ISA instruction set architecture ISA instructional systems approach ISA interim stowage assembly ISAR inverse synthetic-aperture radar ISATS integration spacecraft automated test system ISB independent side band ISC industrial support contractor ISC Information Systems Center ISCCB Internal Software Change Control Board ISCM initial software configuration map ISD inspection supervision disposition ISD instruction sequence diagram ISD instructional systems design ISD instructional systems development (USAF) ISEE international sun-Earth explorer ISF industrial space facility ISHA integrated system hazard analysis ISI initial systems installation ISI instrumentation support instruction ISIL interim support items list ISIS integrated safety information system ISL inertial systems laboratory ISLM integration shop and lab manager ISM image steering mirror ISMRB Information Systems Management Review Board ISMS interactive supply management system ISN internal statement number ISO International Standardization Organization ISP instrumentation support plan ISP Integrated Space Plan ISP integrated support plan ISPF interactive system productive facility ISPG Institutional Support Planning Group ISR industrial security regulation ISR initial system release ISR integrated safety review ISR interim shop release ISR interim system review ISR interrupt service routine ISRB Integrated System Review Board ISS inertial subsystem ISS information subsystem ISS installation support services ISS instruction summary sheet ISS integrated scheduling system ISS integrated system schematic ISS international space station ISSA integrated software safety analysis ISSL initial spares support list ISSO Information Systems Security Office IST initial system test IST instrumentation support team IST integrated systems test ISTA intertank structural test assembly ISTB integrated subsystem test bed ISU international system of units ISWG Integrated Support Working Group IT identification transponder IT integrated technology IT&V integrated test and verification ITA integrated test area ITA integrated test article ITA integrated truss assembly ITB invitation to bid ITC igloo thermal control ITC integrated test configuration ITD informal test description ITD integrated technology demonstration ITD integrated test documentation ITDR integrated technology and design review ITE instrumentation test equipment ITE integration test equipment ITE intersite transportation equipment ITI inspection and test instruction ITIS ITI sheet ITL integrate, transfer, and launch ITL integrated transport launcher ITMG integrated thermal/micrometeoroid garment ITO initial time-out ITO integration and test order ITP informal test plan ITP informal test procedure ITP integral tile part ITP integrated test plan ITP integrated training plan ITR informal test result ITR integrated technology review ITR interim technical report ITRB Integrated Technical Review Board ITRD integrated test requirements document ITRR integrated technology requirements review ITS Institute for Telecommunications Sciences ITS integrated transfer subsystem ITS intercept trajectory simulation ITSS integrated tactical surveillance system ITU infrared telescope unit ITU International Telecommunication Union ITV instrumented test vehicle ITV integrated technology validation ITVE integrated technology validation experiment IU instrument unit IU interface unit IUA inertial unit assembly IUA interface unit adapter IUCS instrumentation update command system IUDS integrated utilities distribution system IUE interface unit error IUE international ultraviolet explorer IUI integrated user interface IUO interunit order IURAP International User Resource Allocation Panel IUS inertial upper stage IUS interim use sheet IV initial velocity IV integrated vehicle IV interface volume IV&V independent validation and verification IVA intravehicular activity IVAR internal variable IVBC integrated vehicle baseline characteristic IVBC integrated vehicle baseline configuration IVC intervehicular communication IVE interface verification equipment IVLN integrated vehicle logic network IVP interface verification plan IVS interface verification summary IVSI instantaneous vertical speed indicator IVT integrated verification test IVT integration, verification, and training IVT interface verification test IVT intervehicular transfer IW in work IW intrawing IWBS indirect work breakdown structure IWDS inter-work-package distributed system IWFS integrated waste fluid system IWG Interface Working Group IWP indirect work package IWS integrated water system InAsSb indium-arsenide-antimonide InSb indium antimonide Isp specific impulse J Joule (SI unit) J-CLOT joint closed-loop operations test J-FACT joint flight acceptance composite test J-T Joule-Thompson J-box junction box J/M jettison motor J/S jammer-to-signal ratio JAEIC Joint Atomic Energy Intelligence Committee JAEL JSC avionics evolution lab JAN joint Army-Navy JANNAF joint Army, Navy, NASA, Air Force JAS Journal of Aerospace Science JB junction box JC job card JCA jettison controller assembly JCCS job card control system (subsystem) JCL job control language JCS Joint Chiefs of Staff JEA joint-endeavor agreement JED julian ephemeris date JEM Japanese experiment module JEM EF Japanese Experiment Module Exposed Facility JES joint environment simulator JETS joint electronic-type system JFAS jet fuel accounting system JFET junction field effect transistor JIC job instruction card JIP joint installation plan JIR job improvement request JIS joint integration simulation JISWG Joint Integrated Simulation Working Group JIT just in time JMTSS joint multichannel trunking and switching system JO job order JOA joint operating agreement JOC Joint Operations Center JOD joint occupancy date JOIP joint operation interface procedure JOIP joint operations interface plan JOP joint operating procedure JOP Jupiter orbiter probe (Galileo) JOR job order request JOVIAL Joule's own version international algebraic language JP jet propellant JP jet propulsion JPASO Joint Pacific Area Scheduling Office JPC joint power conditioner JPIC Joint Program Integration Committee JPL Jet Propulsion Laboratory JPO Joint Program Office JPOC JSC Payload Operations Center JPP joint program plan JRB Joint Review Board JSAT Joint Structural Assessment Team JSC Johnson Space Center JSCM JSC manual JSL job select logic JSLWG Joint Spacelab Working Group JST joint systems test JSTARS joint surveillance target attack radar system JSTPS joint strategic targeting planning staff JTA job task analysis JTG Joint Training Group JTIDS joint tactical integrated display system JTIDS joint technical information distribution system JTS job training standard JTSC Joint Test Support Center JURG Joint Users Requirements Group K Kelvin K kilocycle K thousand K-APM KSC automated payloads plan/requirement K-APN KSC automated payloads notice K-APPS KSC automated payloads project specification K-CITEM KSC CITE plan/requirement K-DODM KSC DOD plan/requirement K-DPM KSC DOD payloads plan/requirement K-DPN KSC DOD payloads notice K-DPPS KSC DOD payloads project specification K-IUSM KSC IUS plan/requirement K-IUSN KSC IUS notice K-IUSPS KSC IUS project specification K-MMSEM KSC MMSE plan/requirement K-MMSEN KSC MMSE notice K-MMSEPS KSC MMSE project specification K-SLM KSC Spacelab plan/requirement K-SLN KSC Spacelab notice K-SLPS KSC Spacelab project specification K-SM KSC Shuttle management document K-SPN KSC Shuttle project notice K-SPS KSC Shuttle project specification K-SSS KSC Shuttle project station set specification K-STSM KSC STS plan/requirement K-STSN KSC STS notice K-STSPS KSC STS project specification K-load constant load K/S kick stage KA kill assessment KAPL KSC approved parts list KATE knowledge-based autonomous test engineer KATS KSC avionics test set KAU kilo accounting unit KB keyboard KBAC Kennedy booster assembly contractor KBC Kapton beta cloth KBIM keyboard interface module KBS knowledge-based system KBSA knowledge-based software assistant KBU keyboard unit KCAS knots calibrated airspeed KCR KSC change request KCRT keyboard cathode-ray tube KCS key configuration study KCS keyboard configuration study KCV KKV carrier vehicle KDMS Kennedy data management system KDN kinetically designed nozzle KDS Kennedy-developed software KDT keyboard and display test KDV KKV deployment vehicle KE kinetic energy KEAS knots equivalent airspeed KEE knowledge engineering environment KELV KKV/ESM launch vehicle KEV kinetic-energy vehicle KEW kinetic-energy weapon KHB KSC Handbook KHIL KKV hardware in the loop KHILS KKV hardware-in-the-loop simulator KHIT KKV hovering interceptor test KIAS knots indicated airspeed KIMS KSC inventory management system KIP keyboard input processor KIS kitting instruction sheet KKV kinetic kill vehicle KKVWS kinetic kill vehicle weapon system KKW kinetic kill weapon KMI KSC management instruction KMR key milestone review KMR Kwajalein Missile Range KN kitting notice KN KSC notice KNO Kano, Nigeria KOH potassium hydroxide KOI KSC operation instruction KOM KSC organizational manual KOSC Kennedy Operations Support Center KPD KSC program directive KPRD KSC program requirements document KPSM Klystron power supply modulator KREMS Kiernan reentry measurements site KREMS Kwajalein reentry measurement system KSA Ku-band single access KSC Kennedy Space Center KSCAP Kennedy Space Center area permit KSLOC thousands of source lines of code KSSS KSC station set specification KTF Kauai Test Facility KU keyboard unit KV kill vehicle KuSP Ku-band signal processor L lumen L&C laboratory and checkout L&D landing and deceleration L&L launch and landing L&LS launch and landing site L&M Light and Medium Vehicles Office (MSFC) L&S land and sea L&S logistics and support L&T Laboratories and Test L-L line-to-line L-RFE L-band RF electronics L/C launch complex L/C letter contact L/D length-to-diameter L/D lift-to-drag ratio L/E left-hand engine L/H local horizontal L/M list of materials L/O lift-off L/R locus of radius L/S landing site L/S load system L/T load test L/V launch vehicle L1 primary navigation signal (1,572.42 MHz) L2 secondary navigation signal (1,227.6 MHz) L3 NDS payload signal (1,381.05 MHz) LA launch abort LA launch aft LA launch and ascent LA launch area LA launch azimuth LA lightning arrester LA low attitude LAC Lockheed Aircraft Corporation LACB Landing Aids Control Building LACI laser autostigmatic cube interferometer LACIE large-area crop inventory experiment LACIP large-area crop inventory program LADS logistic automated data system LAET limiting actual exposure time LAGEOS laser geodynamic satellite LAGS launch abort guide simulation LAI logistics artificial intelligence LAIRT large-aperture infrared telescope LAIU launch abort interface unit LAM low-altitude mission LAMMR large-antenna multichannel microwave radiometer LAMOD laser optical motion detector LAMP LODE advanced mirror program LAMPS light airborne multipurpose system LAN local area network LANES III LAN extensible simulator LANL Los Alamos National Laboratory LAP linear accelerometer package LAPSS large-area pulse solar simulator LARS laminar angular rate sensor LARSSYAA Laboratory for Application of Remote Sensing Aircraft Analysis LAS low-altitude sensor LASERCOM laser communications payload LASS large-amplitude space simulator LASS low-altitude surveillance system LASV low-altitude supersonic vehicle LAT large angle torque LAT logistic asset tracking LAT lot acceptance test LATRS laser acquisition and tracking system LAW low-altitude weapon LB launch boost LB load bank LB low bay LB lower brace LBA Latin Businessmen's Association LBDT low-bay dolly tug LBET large beam expander technology LBL left buttock line LBM liquid boost module LBM load buffer memory LBNPD lower body negative pressure device LBR low bit rate LBS L-band subsystem LBSP logistics business systems plan LBTB launch base test plan LBTPP launch base test plan/procedure LC lasercom LC launch complex LC launch cost LC launch countdown LC launch critical LC left center LC load carrier LC&CO launch control and checkout LCA launch control amplifier LCA load control assembly LCA load controller assembly LCB least common bit LCC Launch Control Center LCC launch commit criteria LCC launch control complex LCC leadless chip carrier LCC life cycle cost LCCD launch commit criteria document LCD launch countdown LCE launch complex engineer LCE launch complex equipment LCF low-cycle fatigue LCG liquid-cooled garment LCH4 liquid methane LCHTF low-cycle high-temperature fatigue LCM least common multiple LCM liquid crystal mete LCMS low-cost modular spacecraft LCN logic change notice LCN logistics control number LCN loosely coupled network LCOM logic control output module LCR low cross range LCS launch control system LCS list of command signals LCU line coupling unit LCU load control unit LCUG liquid cooling undergarment LCV logistics cargo vehicle LCVG liquid cooling and ventilation garment LCVG liquid cooling ventilation garment LD lateral direction LD loading dock LDB launch data bus LDB logistics data bank LDC lot date code LDD logical data base design LDEC lunar docking events controller LDEF long-duration exposure facility LDIU launch data interface unit LDP large deployable reflector LDP local data package LDR low data rate LDRP logistics depot repair procedure LDS landing, deservicing, and safing LDS landing/deceleration subsystem LDS laser docking sensor LDS launch detection satellite LDS layered defense system LDSD Low-Density Supersonic Decelerator LDT level detector LDT linear displacement transducer LDZ lithium-depleted zone LE launch escape LE leading edge LEA logistics engineering analysis LEA/MP logistics engineering analysis and maintenance planning LEADS LWIR Exoatmospheric Discrimination Study LEAP lightweight exoatmospheric projectile LEB lower equipment bay LEC Lockheed Electronics Company LECP leading edge connective heat transfer program LED light-emitting diode LEDC low-energy detonating charge LEDI low endoatmospheric defense interceptor LEFF launch effectivity (flight required to support) LEFM linear elasticity fracture mechanics LEH launch and entry helmet LEID low-energy ion detector LEM laboratory environment model LEM launch escape monitor LEO librating equidistant observer LEO low Earth orbit (up to 3,000 km) LEP large external pressurized LER long eye relief (optics) LER lunar eyepiece receptacle LES launch equipment shop LES launch escape subsystem LES launch-entry suit LES leading edge subsystem LES Lincoln experimental satellite LESS leading edge structural subsystem LESS leading edge structure subsystem LESS leading edge subsystem LET linear energy transfer LETF Launch Equipment Test Facility (KSC) LEU large external unpressurized LEV lunar excursion vehicle LF launch facility LF launch forward LF load factor LF low frequency LFA logistics/functional analysis LFAF low-frequency accelerometer flutter LFAM low-frequency accelerometer modes LFAP low-frequency accelerometer pogo LFF lower forward fuselage LFM local focus mechanism LFO low-frequency oscillator LFOP Landing and Ferry Operations Panel LFRR low-frequency radio range LFV lunar flying vehicle LG landing gear LGA low-gain antenna LGS landing gear subsystem LGTA landing gear test article LH left-hand LHA local hour angle LHC left-hand circular LHCP left-hand circular polarization LHCP left-hand circularly polarized LHCl liquid hydrogen chloride LHFEB left-hand forward equipment bay LHOP laser-hardened optical payload LHP left-hand panel LHRCS left-hand reaction control system (subsystem) LHS left-hand side LHSC left-hand side console LI laser illuminator LIB left inboard LIC load interface circuit LID laser-induced damage LID leadless inverted device LIDAR laser-radar LIE left inboard elevon LIFO last in, first out LIMRC LRU Identification and Maintenance Requirements Catalog LIMS logistics information management system LIMS logistics inventory management system LINC logic and information network compiler LINJET liquid injection electric thruster LINS laser inertial navigation system LIP land impact program LIS logistics information system LISP list processing language LIU line interface unit LL launch and landing LL launch left LL lever lock LL live load LL long lead LL long line LL low-level LL lower limit LLC logical link control LLCF launch and landing computational facility LLCSC low-level computer software component LLCSC lower level computer software component LLI limited-life item LLL limited-life list LLNL Lawrence Livermore National Laboratory LLO low lunar orbit LLO2 lunar liquid oxygen LLOS landmark line of sight LLP launch and landing project LLPO Launch and Landing Project Office LLR load-limiting resistor LLS launch and landing site LLT long lead time LLTIL long-lead-time items list LM laboratory module LM launch mode LM left mid LM logistics manager LM logistics manual LM long module LM lunar module LMD large mirror development LMDE lunar module descent engine LMDS logistics management data system LME launch monitor equipment LMF lower mid fuselage LMG left main gear LMIF lower mechanical integration frame LMLG left main landing gear LMP list measurement point LMRT logistics management responsibility transfer LMS load measurement system LMS logistics master schedule LMSC Lockheed Missiles and Space Corporation LMSS lunar mapping and survey system LMT logistics management transfer LNA low-noise amplifier LNG liquified natural gas LO launch operations LO lift-off LO local oscillator LO lock-on LO lubricating oil LOA landing operations area LOA launch operations area LOAD low-altitude defense LOAP list of applicable publications LOB launch operations building LOB left outboard LOB line of balance LOC launch operations center LOC launch operations complex LOC launch operations contractor LOC level of conflict LOC lines of code LOC loss of control LOCB Launch Operations Control Building LOCS local optical correction system LOD Launch Operations Directorate LOD Launch Operations Division LOD launch order document LODE large-optics demonstration equipment LODE large-optics demonstration experiment LOE left outboard elevon LOE level of effort LOE line of effort LOFAR low-frequency acquisition and ranging LOFO low-frequency oscillation LOGCENT Logistics Control Center LOGMOD logic model LOGO limit of government obligation LOI lunar orbit insertion LOIS Logistics Information Simulator LOL limit of liability LOLI limited-operational-life items LON launch on need LONS local on-line network system LOO launch operations orders LOOMS laser optics operations and maintenance support LOP Launch Operations Panel LOR lunar orbit rendezvous LORA level-of-repair analysis LOS lift-off simulator LOS line of sight LOS loss of signal LOS loss of sync LOSHEA line-of-sight hard Earth angle LOSP Landing Operations Support Panel LOSR line-of-sight range LOSS lunar orbital space station LOT lift-off time LOV limit of visibility LOWG Landing Operations Working Group LP launch pad LP launch processing LP line printer LP liquid propellant LP low-pass LP low-pressure LP lower panel LPA log periodic antenna LPA low-power amplifier LPD landing point designator LPD launch preparation document LPD launch procedure document LPD list of physical dimensions LPE liquid phase epitaxy LPF low-pass filter LPFT low-pressure fuel turbopump LPFTP low-pressure fuel turbopump LPG liquid-propellant gun LPI low probability of intercept LPIF Launch Package Integration Facility LPLWS launch pad lightning warning system LPOP low-pressure oxidizer pump LPOT low-pressure oxidizer turbopump LPOTP low-pressure oxidizer turbopump LPOX low-pressure oxygen LPS large pointing system LPS launch processing system LPTTL low-pressure transistor-transistor logic LQR linear quadratic regulator LR laboratory request LR landing radar LR launch right LR left rear LR left rudder LR lower right LR/LD line receiver/line driver LRA laser retroreflector array LRB liquid rocket booster LRCA long-range combat aircraft LRD Launch Recovery Division LRD launch requirements document LRE latest revised estimate LRE liquid rocket engine LRES Liquid Rocket Engine Stability Program LRF liquid rocket fuel LRIP low-rate initial production LRO large radio observatory LROSS Long-Range Optical System Study LRP long-range plan LRR launch readiness review LRSI low-temperature reusable surface insulation LRU line replaceable unit LRU lowest replaceable unit LRV launch readiness verification LRV long-range video LRV lunar roving vehicle LRW left rendezvous window LS landing site LS launch sequence LS launch site LS left side LS life science LS life systems LS limit switch LS local store LS long scarf (thruster nozzle) LS/PPF Launch Site Payload Processing Facility LS/ST light shield/star tracker LSA labor surplus area LSA launch services agreement LSA logistics support analysis LSACN logistics support analysis control number LSAH Launch Site Accommodations Handbook LSAP launch sequence applications program LSAP logistics support analysis plan LSAR logistics support analysis record LSAS logistics support analysis strategy LSB launch support building LSB least significant bit LSB lower side band LSC Launch Services Contract (contractor) LSC launch support contractor LSC launch support controller LSC linear-shaped charge LSCA logistics support cost analysis LSD launch systems data LSD low-speed data LSE launch support equipment LSE life support equipment LSEAT launch systems evaluation advisory team LSF laboratory simulation facility LSF launch support facility LSFR launch site flow review LSG linear sequence generator LSI large-scale integration LSI Lear Siegler, Incorporated LSIC large-scale integrated circuit LSIC launch support integration contractor LSIC launch system integration contractor LSID launch sequence and interlock document LSM life science module LSM logistics support manager LSMDB logistics simulation models and data bases LSO landing support officer LSO large solar observatory LSO Launch Support Operations LSO life systems officer LSOC launch support operations contractor LSOC Lockheed Space Operations Company LSP least significant portion LSPDF Life Science Payload Development Facility LSPPS logistics support plan for preoperational support LSR land-sea rescue LSR laser scanning radar LSR launch site recovery LSR launch support request LSR logistics shop release LSR logistics success rate LSRM life science research module LSS landing and separation simulator LSS large space structure LSS launch site support LSS launch support services LSS life support system (subsystem) LSS load sensing system LSSC launch site support contractor LSSD level-sensitive scan design LSSE laser sensor support equipment LSSL Life Sciences Space Laboratory LSSM launch site support manager LSSP launch site support plan LSSRC life sciences Shuttle research centrifuge LSST launch site support team LST large space telescope LST large stellar telescope LST launch support team LST liquid storage tank LST local standard time LSTD laser system technology demonstration LSTE launch site transportation equipment LSTS launch site test set LSU life support umbilical LSUR launch site utilization report LT lead time LT lot traceability LTA lighter than air LTA lower torso assembly LTD lift-to-drag LTD long-term disability LTDT Langley transonic dynamics tunnel LTG linear tangent guidance LTH lethality and target hardening LTHIS laboratory test hardware inventory status LTM lead time matrix LTM load transformation matrix LTR laboratory test report LTV Ling Tempco Vaught LTV lunar transfer vehicle LTVC linear terminal velocity constraint LTWG Launch Test Working Group LUD layup die LULAC League of United Latin American Citizens LUPI laser unequal path interferometer LUPWT Langley unitary plan wind tunnel LUS liquid upper stage LUT launch umbilical tower LV launch vehicle LV lift vector LV limit value LV load vertical LV loading valve LV local vertical LV low-voltage LVDC launch vehicle digital computer LVDT linear variable differential transformer LVDT linear velocity displacement transducer LVDT linear voltage differential transformer LVE low-voltage electronics LVFRR launch vehicle flight readiness review LVIP launch vehicle integration plan LVIS logistics verification information system LVLH local vertical/local horizontal LVO launch vehicle operations LVP low-voltage pressure LVPS low-voltage power supply LVR low-voltage release LVS launch vehicle simulator LVS launch vehicle system LVSG Launch Vehicle Study Group LVSSTS launch vehicle safety system test set LVTC launch vehicle test conductor LW launch window LW lightweight LWA local wavefront analyzer LWD launch window display LWD left wing down LWG Logistics Working Group LWHS lightweight headset LWIR long-wavelength infrared LWOP leave without pay LWS lightning warning system LaNi5 lanthanum pentanickel LaRC Langley Research Center (Hampton, Virginia) Leasat leased satellite LiOH lithium hydroxide M Mach number M mega- M million M number of revolutions required for the rendezvous M&A monitor and alarm M&C maintenance and checkout M&F manufacturing and facilities M&I management and integration M&L maintenance and logistics M&M materials and maintenance M&O maintenance and operations M&P Materials and Processes (Engineering) M&P materials and processes M&R maintenance and refurbishment M&R maintenance and repair M&RF maintenance and refurbishing facility M&S maintenance and security M&S mapping and surveying M- time in days before move operations M-M-L-S model-modes-loads-stresses M/E mechanical/electrical M/F maintenance factor M/I minimum impulse M/L maintenance loop M/L manual local M/LR maintenance loop recorder M/M maximum and minimum M/P main parachute M/P mass properties M/PHE material or personnel handling equipment M/R mixture ratio (fuel to oxidizer) M/S main stage M/S measurement stimuli M/SCI mission/safety-critical item M/U mockup M/W make work M2P2 multimission production plan M50 Aries mean of 1950, Cartesian coordinates MA maintenance ability MA multiple access MA maintenance advisor MA master alarm MA material authorization MA Mercury-Atlas MA metabolic analyzer MA mike amplifier MA missed approach MA mission analysis MA&P maintenance analysis and planning MA&SE mission analysis and system engineering MA&T manufacturing assembly and test MAA Mathematical Association of America MAA maximum authorized altitude MAAB Materials Application Advisory Board MAAS mission area analysis system MAB master acquisition bus MAB Materials Advisory Board MAB Materials Applications Board MAB mechanical automation breadboard MAB Missile Assembly Building MAC Maintenance Advisory Committee MAC Material Air Command MAC maximum allowable concentration MAC mean aerodynamic chord MAC media access control MAC Military Airlift Command MAC months after contract MAC multiaccess computer MAC multimission applications concept MACDS monitor and control display system MACE mechanical antenna control electronics MACE missile and control equipment MACO major assembly checkout MACRO merge and correlate recorded output MACS management and control system MAD Madrid, Spain (STDN) MAD maintenance analysis data MAD momentum accumulation and dumping MADC multiplexer analog-to-digital converter MADCS modular attitude determination and control system MADRE manufacturing data retrieval (system) MADS modular auxiliary data system MADS monitor and control display system MAEP minimum autoland entry point MAF main assembly fixture MAF manpower authorization file MAF Michoud Assembly Facility MAF mixed amine fuel MAGSAT magnetometer satellite MAI machine-aided indexing MAICO manufacturing, assembly, installation, and checkout MAIDS management automated information display system MAIDS multipurpose automatic inspection and diagnostic system MAIL Mockup and Integration Laboratory MAIR manufacturing and inspection record MAL material allowance list MAL mobile airlock MAL model assembly list MALLR MAnned Lunar Landing and Return (Apollo Project) MALT model assembly list transmittal MAN microwave aerospace navigation MANTECH manufacturing technology MAOT maximum allowable operating time MAP maintenance analysis program MAP manufacturing automation protocol MAP measurement allocation plan MAP message acceptance pulse MAP missed approach point MAP mission application program MAPOLE magnetic dipole spark transmitter MAPS measurement of air pollution from satellites MAPTIS materials and processes technical information system MAR maintenance and refurbishment MAR memory address register MAR mid-deck accommodations rack MARP Markov analysis and reliability prediction MARRS mission analysis and reconfiguration requirements system MARS manned astronautical research station MARS Martin automatic reporting system MARS MCC automated reconfiguration system MARS modular airborne recorder system MAS MAST approval sheet MAS measurement approval sheet MAS medium-altitude sensor MASDC Military Aircraft Storage and Disposition Center MASER microwave amplification through stimulated eadiation MASSPO Manned Space Flight Support Project Office MAST measurement and stimulus MAST measurement and stimulus system (data base) MASTIF Multiaxis Spin Test Inertial Facility MAT meteorological atmospheric turbulence MAT mount alignment tool MAT multiple actuator test MATCO material control MATCO materials analysis, tracking, and control MATE modular automated test equipment MATE modular automatic test equipment MATS master manufacturing and test schedule MAU million accounting units MAWG Maintenance Analyzer Working Group MB main bus MB management baseline MB manned base MB midbody MBA multiple beam antenna MBA multiple berthing adapter MBAC Marshall booster assembly contractor MBAR Marshall baseline accounting and reporting system MBB Messerschmitt-Boklow-Blahn MBC maximum breathing capacity MBCP mission budget capture program MBCS motion base crew station (SMS) MBE Minority Business Enterprises MBFP manufacturing build and flow plan MBI multibus interface MBK medications and bandage kit MBL mobile unit (TACAN station) MBM magnetic bubble memory MBO management by objective MBPS main bus power supply MBSU main bus switching unit MBV main base visit MC machine check MC mission controller MC momentary contact MC manual control MC material control MC memory configuration MC midcourse correction MC military characteristic MC mission capability MC mission completion MC mission continuation MC&C measurement, command, and control MC&W master caution and warning MC/EC mission-critical/embedded computer MCA main console assembly MCA maximum crossing altitude MCA monitoring and control assembly MCA motor controller assembly MCA multichannel analyzer MCAT Manufacturing Cell Action Team MCAT missile carrier air transport MCBF mean cycle between failures MCC main combustion chamber MCC main control console MCC midcourse correction MCC Mission Control Center (JSC) MCC mobile command center MCC-H Mission Control Center, Houston MCC-K Mission Control Center, Kennedy MCCC Mission Control and Computing Center MCCG Mission Command and Control Group (NASA) MCCL maintainability criteria checklist MCCL maintenance criteria checklist MCCP mission contamination control plan MCCR mission-critical computer resource MCCS Mission Control Center simulation MCCS Mission Control Center system MCCS mission-critical computer system MCD minimum cost design MCDS maintenance control and display system MCDS malfunction CRT display system MCDS management communication and data system MCDS multifunction CRT display system MCDU multifunction CRT display unit MCE manpower and cost estimate MCE model control element MCF maintenance and checkout facility MCF military computer family MCF mission control facility MCI midcourse interceptor MCIR mission configuration and implementation requirements MCIS material control and information system MCIU manipulator controller interface unit MCIU master controller interface unit MCIU mission control and interface unit MCL mass cargo lander MCL mass change log MCL master configuration list MCLT maximum cruise level thrust MCM MADS control module MCM multichip module MCN maintenance change notice MCN master change notice MCO mission control operations MCOP Mission Control Operations Panel MCP main control panel MCP monitoring and control panel MCP master change package MCP master change proposal MCP master computer program MCP materials control plan MCP measurements control procedure MCP Military Construction Program MCP minor cycle period MCP mission control programmer MCPC manipulator controller power conditioner MCPP mission configuration product plan MCPS major cost proposal system MCR master change record MCR master change request MCRDF mission configuration requirements data file MCRF mission configuration requirements file MCRG Mission Configuration Requirements Group MCS maintenance and checkout station MCS management control system MCS maneuver control system MCS manufacturing control system MCS master control station MCS measurements calibration system MCS mission control system MCS monitor control system MCT maximum climb thrust MCT MCC console trainer MCT Mercad telluride MCT mercury, cadmium, telluride MCT methodology coordination team MCT mission control team MCU master control unit MCU medium close-up MCU mission control unit MCVP materials control and verification program MCW modulated continuous wave MD malfunction detection MD manual direct MD manual disconnect MD master dimension MD microdot MD mid-deck MD Missile Division MD mission director MD-BF body flap manual direct control mode MD-P pitch manual direct control mode MD-YR yaw roll manual direct control mode MDA maintainability design approach MDA manufacturing design analysis MDA mid-deck assembly MDA mission data analysis MDA motor drive amplifier MDA multiple docking adapter MDAC McDonnell Douglas Aircraft Company MDAC McDonnell Douglas Astronautics Company MDAR malfunction detection, analysis, and recording MDAS meteorological data acquisition system MDAS mission data acquisition system MDB main memory data output bus MDB master data base MDB mission data book MDC main display console MDC mission director center MDC mission duty cycle MDCA main distribution control assembly MDCS maintenance data collection system MDCS malfunction display and control system MDCS master digital command system MDCS material data collection system MDD mate/demate device MDDS material directory data sheet MDE mission-dependent equipment MDE mission-dependent experiment MDE modular display electronics MDF main distribution frame MDF Manipulator Development Facility MDF Mating/Demating Facility MDF mild detonating fuse MDFP MAST data format processing MDFP mission data format processing MDI management data and information MDI mission data input MDL master data library MDL module design language MDL momentum dump logic MDM manipulator deployment mechanism MDM Material Division Manual MDM module design methodology MDM multiplexer/demultiplexer MDOP maximum design operating pressure MDP main display panel MDP master display panel MDP mission data pressure MDP mission data processing MDP mission data processor MDR maintenance demand rate MDR monthly director's review MDR major design review MDR manufacturing design review MDR material disposition review MDR mechanical design review MDR midterm design review MDR minor discrepancy repair MDR missing data report MDR mission data reduction MDRD mission data requirements document MDRS manufacturing data retrieval system MDRS mission data retrieval system MDS magnetic disk system MDS malfunction detection system MDS management data system MDS master development schedule MDS minimum discernible signal MDS mission development simulator MDSD mate/demate stiff-leg derrick MDSE manufacturing and development support equipment MDSS mission data support system MDSSC McDonnell Douglas Space Systems Company MDST mission director support team MDST mission disaster support team MDT maintenance demand time MDT mean detonating time MDT mean downtime MDT measurement descriptor table MDT mountain daylight time MDTSCO McDonnell Douglas Technical Service Company MDU mission data unit MDV map and data viewer ME main engine ME management engineering ME Manufacturing Engineering (MSFC) ME metallurgical engineer ME miscellaneous equipment ME mission evaluation ME&D manufacturing engineering and development MEA main electronics assembly MEA maintenance engineering analysis MEAR maintenance engineering analysis request MEAR manufacturing engineering analysis report MEB main electronics box MEBA Marine Engineers' Beneficial Association MEBO main engine burnout MEC main engine controller MEC manual emergency control MEC master event controller MEC mission events controller MECA main engine controller assembly MECA missile electronics computer assembly MECAS mission equipment configuration accounting system MECCA master electrical common connector assembly MECF main engine computational facilities MECLSI mission equipment configuration launch site installation MECO main engine cutoff MECR maintenance engineering change request MECSLSI mission equipment cargo Shuttle launch site MECSLSI mission equipment cargo support launch site MED manual entry device MED momentum exchange device MEDICS medical information computer system MEDS mechanical engineering design system MEE mission-essential equipment MEECN minimum essential emergency communication network MEFE mission-essential-function equipment MEI main engine ignition MEI master end item MEIU main engine interface unit MEK methylethyl ketone MEK mission equipment kit MEKF Misson Equipment Kit Facility MEL minimum equipment list MELI master equipment list index MEM Mars excursion module MEM meteoroid exposure module MEM mid-deck electronics module MEM module exchange mechanism MENS mission element needs statement MEO manufacturing engineering order MEO mid Earth orbit MEOP maximum expected operating pressure MEP main engine propellant MEP management engineering program MEP Manipulator Engineering Panel MEP mean effective pressure MEP medium external pressurized MEP minimum entry point MER Mission Evaluation Room MERL Materials Engineering Research Laboratory MERSAT meteorology and Earth observation satellite MERU milli-Earth rate unit MES main engine start MES mated elements simulator MES mated events simulator MES mission events sequence MESA miniature electrostatic accelerometer MESA modular equipment stowage assembly MESC master events sequence controller MESC mission events sequence controller MESELSI mission extension Shuttle equipment launch site MESELSI mission extension support equipment launch site MESSOC model evaluation of Space Station operations cost MET master events timer MET mission elapsed time MET mission events timer MET multielement test METS multienvironment test system METVC main engine thrust vector control MEU medium external unpressurized MEV mass excursion vehicle MEWG Maintenance Engineering Working Group MF major function MF master frame MF mate and ferry MF mated flight MF medium frequency MF mid-deck forward MF midfuselage MF motor field MFA manned flight awareness MFBP manufacturing flow and build plan MFC manual flight control MFC multiple-flight computer MFC multiple-flight controller MFCS manual flight control system MFD main feed MFD malfunction detection MFD metal friction device MFE midfrequency executive MFF MDM flight forward MFG major functional group MFLOPS millions of floating-point operations per second MFO major function overlay MFP main free path MFP mission flight plan MFP mosaic focal plane MFR manipulator foot restraint MFR maximum flight rate MFR multifunctional receiver MFR multifunctional review MFRM mobile foot restraint manipulator MFSK M-ary frequency shift keying MFSP macrofunction signal processor MFT mean flight time MFT module fixture transporter MFTAD master flight test assignment document MFTIO minimum flyout time for orbital interception MFV main fuel valve MG middle gimbal MG mission generation MG mobile generator MG motor-generated MGA middle gimbal angle MGC manual gain control MGE maintenance ground equipment MGI management group identifier MGS mobile ground station MGS mobile ground system MGSE mechanical ground support equipment MGT major ground test MGT mobile ground terminal MGVT mated ground vibration test MH man-hour MHA multiple-headset adapter MHC manipulator hand controller MHD magnetohydrodynamics MHD multihead disk MHE material handling equipment MHF medium high frequency MHP move and handling procedure MHSC manipulator handset controller MHV miniature homing vehicle MHW multihundred watt MHz megahertz (megacycles per second) MI malleable iron MI management information MI minimum impulse MI minority institution MIA multiple-interface adapter MIA multiplexer interface adapter MIB master interconnect board MIB minimum-impulse bit MIB multilayer interconnection board MIC Management Information Center MIC memory interface connector MIC minimum-impulse controller MICB Meck Island Control Building MICB Mission Integration Change Board MICIS material inventory control and information system MICIS mechanized information control inventory system MICIS mechanized inventory control information system MICNS modular integrated communication and navigation system MICOM Missile Command MICOM Missile Command (Army) MICOS multifunctional infrared coherent optical sensor MICS management information and control system MIDAS mission integrated design analysis simulator MIDDS meteorological interactive data display system MIDSIM midcourse exoatmospheric event-based simulator MIDSIM midcourse simulation MIEWF master integrated engineering work file MIF mechanical integration frame MIF module integration facility MIG metal inert gas MIG miniature integrating gyro MII master inspection item MIIA Merritt Island industrial area (NASA) MIL GSFC STDN station (KSC) MIL man in loop MIL-STD military standard MILA Merritt Island launch area MILCOMSAT military communications satellite MILES a computerized schedule system MILS missile impact location system MILSTAR military communications satellite MILSTAR military strategic and tactical relay system MIMO multiple instruction, multiple data paths MIMOSA mission modes and space analysis MIMR monthly integration management review MIMS medical information management system MINW master interface network MIO Management Integration Office MIP mandatory inspection point MIP Measurement Integration Panel MIP minimum-impulse pulse MIP MMU integration plan MIP modification instruction package MIPIAN computer-assisted process planning MIPIR missile impact pointing imaging radar MIPR military intergovernmental purchase request MIPS Merritt Island press site MIR malfunction investigation report MIR mission integration review MIRS management information and reporting system MIRV multiple independently targetable reentry vehicles MIS magnetic isolation system MIS management information system MIS master index schedule MIS master integrated schedule MIS mission information system (subsystem) MIS-PLAN MIS-payload activity network MISTRAM missile trajectory measurement MIT Massachusetts Institute of Technology MIT master instruction tape MIT mercury in thruster MIT mercury ion transfer MIT mission integration team MIT/LL Massachusetts Institute of Technology, Lincoln Laboratory MITAS missile threat analysis simulation (simulator) MITIL MIT Instrumentation Laboratory MITOC missile intercom technical operational communication MITTS mobile IGOR tracking telescope system MIU malfunction insertion unit MIUS modular integrated utility system MIVP mission interface verification plan MJ mechanical joint MJ megajoule MJS manipulator jettison system ML message line ML mobile launcher ML mold line MLA MDM launch aft MLAS Max Launch Abort System (Ares I) MLA monochrome lens assembly MLB multilayer board MLC mobile launcher computer MLE mesoscale lightning experiment MLF MDM launch forward MLG main landing gear MLGD main landing gear door MLGS microwave landing guidance system MLI multilayer insulation MLL MDM launch left MLP machine language program MLP mobile launch platform MLP mobile launcher platform MLR MDM launch right MLR monodisperse latex reactor MLS medium long shot MLS microwave landing system MLS multilevel security MLV medium launch vehicle MLV medium-lift launch vehicle MLW maximum landing weight MM main memory MM main module MM major mode MM man-month MM Marshall manual MM mass memory MM material manual MM motor module MM&TS master manufacturing and test schedule MMA moving mechanical assembly MMACS maintenance management and control system MMAS material management and accounting system MMAS mechanized material accountability system MMC Martin Marietta Corporation MMC master microprocessor control MMC metal matrix composite MMC midcourse measurement correction MMC midmotor controller MMC Mission Management Center MMCA midmotor controller assembly MMCCB Multimission Change Control Board MMCL master measurement and control list MMD mean mission duration MMD mobile maintenance depot MMD MSC maintenance depot MMDB master measurement data base MMDF mission model data file MMDS maintenance management data system MMES MSFC mated-element system MMF magnetomotive force MMH maintenance man-hour MMH monomethylhydrazine MMH/FH maintenance man-hours per flight hour MMH/Y maintenance man-hours per year MMI man-machine interface MMI Marshall management instruction MMIA monolithic microwave integrated amplifier MMIC millimeter-wave monolithic integrated circuit MMIC monolithic microwave integrated circuit MMIDS man-machine interface development station MMIP mass memory integration plan MML master measurement list MMLS Martin Marietta Launch Services MMLS model-modes-loads-stresses MMOS multimode optical sensor MMP mechanical parts, materials, processes MMP mission management plan MMPSE multiuse mission payload support equipment MMR mass memory ready MMRS manned military recovery system MMS manned maneuvering system MMS mission modular spacecraft MMS modular multiband scanner MMS module management system MMS multimission modular spacecraft MMS multimission spacecraft MMSE multimission support equipment MMSE multiuse mission support equipment MMT mass memory test MMT mission management team MMU manned maneuvering unit MMU mass memory unit MMU midcourse measurement unit MMUS mass memory unit simulator MN main bus MNEE mission nonessential equipment MNET Mission and Data Operations Directorate network MNOS metal nitride oxide semiconductor MO major objective MO manned orbiter MO manual orientation MO manufacturing order MO master oscillator MO mid-deck overhead MO mission operations MOA make on arrival MOA memorandum of agreement MOC Marine Operation Center MOC Mission Operations Center MOC mission operations computer MOCC Mission Operations Control Center MOCF Mission Operations Computational Facility MOCITE mobile checkout and integration test equipment MOCR mission operations control room MOCS multichannel ocean color sensor MOCV manual oxygen control valve MOD Mission Operations Directorate MOD mission objectives document MOD mission operations director MODART method of defeating advanced radar threats MODS military orbital development system MOE measure of effectiveness MOF manned orbital flight MOI moments of inertia MOL manned orbital laboratory MOLFLUX molecular flux (model) MOM mission operations manager MOMS mobile optical measurement system MOP measure of performance MOP mission operations plan MOP mission operations processor MOPA master oscillator power amplifier MOPIS missile operations intercommunications system MOPR mission operations planning review MOPR mission operations planning room MOPS military operation phone system MOPS missile operations MOPS mission operations planning system MOR manufacturing operations record MOR manufacturing order record MOR mission objective and requirements MORD medical operations requirements document MORL manned orbiting research laboratory MORT management oversight and risk tree MOS metal oxide on substrate MOS metal oxide semiconductor MOS mission operations system MOS multiple optical switch MOSC Mission Operations Support Center MOSFET metal-on-silicon field-effect transistor MOSP mission operations success program MOSP mission operations support program MOSPO mobile satellite photometric observatory MOSR mission operations support requirement MOSS manned orbital space station MOSS Mission Operations Support Services MOSS MMDB operational subsystem status MOSTT mosaic optical sensor technology test bed MOTR multiple-object tracking radar MOU memorandum of understanding MOV main oxidizer valve MOW mission operations wing MP major program MP management package MP mass properties MP measuring point MP medium pressure MP melting point MP Meteorology Panel MP mission planner MP mod package MP&C maintenance planning and control MP/G material procedure government MPA manufacturing producibility analysis MPA miniature pendulum accelerometer MPAC multipurpose applications console MPAD Mission Planning and Analysis Division (JSC) MPAR maintainability problem and assessment report MPB maintenance parts breakdown MPBS main power bus supply MPC material procurement cost MPC memory protection check MPC Meteorological Prediction Center MPC midbody pyro controller MPC midpower controller MPCA midpower controller assembly MPCMP mass properties control and management plan MPD main dc power distributor MPD management position description MPD maximum permissible dose MPE maximum permissible exposure MPESS mission-peculiar equipment support structure MPESS mission-peculiar experiment support structure MPG multipoint grounding MPGHM mobile payload ground handling mechanism MPHE material and personnel handling equipment MPI mean point of impact MPI mission payload integration MPICD mission-peculiar interface control document MPIIN modification procurement instrument identification MPIO Mission Payload Integration Office MPL maintenance parts list MPL master program library MPL materials and process list MPL mechanical parts list MPL minimum power level MPLN maintenance planning (data base) MPM manipulator positioning mechanism MPMP mass properties management plan MPMP mechanical parts, material process MPMP mechanical parts, materials, and processes MPMSE multiuse payload and mission support equipment MPOR master power-on reset MPP manufacturing process procedure MPP material processing procedure MPP mission preparation processor MPPSE multipurpose payload support equipment MPR maintainability problem report MPR malfunction problem record MPR mockup purchase request MPR monthly program review MPRAS multipath redundant avionics suite MPS main propulsion system (subsystem) MPS maneuvering propulsion subsystem MPS master production schedule MPS master program schedule MPS material processing satellite MPS material processing specification MPS materials processing in space MPS materials processing science MPS multiple protective structures MPS&P material processing specifications and procedures MPSR mission profile storage and retrieval MPSR multipurpose support room MPST multipurpose support team MPT main propulsion test MPT mission planning terminal MPTA main propulsion test article MPTF Main Propulsion Test Facility MPTF mission planning task force MPTP main propulsion test program MPTS multipurpose tool set MPVA main propellant valve actuator MR maintenance and refurbishment MR management review MR master reset MR material request MR material review MR mission report MR mixture ratio MRA mechanical readiness assessment MRA mission requirements analysis MRA mission requirements and allocation MRB Material Review Board MRB mission reconfiguration base MRBM medium-range ballistic missile MRC Measurement Requirements Committee MRCR measurement requirement change request MRD material review disposition MRD mission requirements definition MRD mission requirements document MRDA mission requirements definition and analysis MRDB mission requirements data base MRDR material review disposition record MRDR mission requirements data base Rockwell MRE material review engineering MRF maintenance responsibility file MRF maximum retarding force MRF measurements/stimuli request form MRF missile repair facility MRI measurement requirements and interface MRIM MOD/MOC reconfiguration interface manager MRIR medium-resolution infrared radiometer MRL manipulator retention latch MRL manipulator retention lock MRL material requirements list MRL measurement requirement list MRL missile reference line MRM mission reconfiguration master MRM mission requirements matrix MRMS mission reconfiguration management system MRMS mobile remote manipulator system MRO maintenance repair and operation MRO material release order MRP manufacturing resource planning MRP material requirements planning MRP material review process MRP missile reference plane MRP mission reference plane MRR manufacturing readiness review MRR mission readiness review MRR mission reconfiguration request MRR mission requirements review MRS management review system MRS master repair schedule MRS mobile remote servicer MRTFB major range and test facility base MRTS material requirements tracking system MRTS modification and repair tracking system MRTS modification recycle tracking system MRWG Mission Requirements Working Group MS machine screw MS mechanical system MS medium shot MS milestone MS military standard (parts designation) MS mission sequence MS mission specialist MS mission station MS monitor station MS machine steel MS manned system MS margin of safety MS Marsenne-Schmidt MS mass spectrometer MS master switch MS material specification MS mating sequence and control MS-DOS Microsoft disk operating system MS/MS material science and manufacturing in space MSA main bus solar array MSA major subcontract administrator MSA master schedule authorization MSA material service area MSA material subcontract administrator MSA Metropolitan Survey Area MSA minimum surface area MSAD materials summary acceptance document MSB most significant bit MSBLS microwave scan-beam landing system MSBLS-GS MSBLS ground station MSC master schedule chart MSC master sequence controller MSC Materials Service Center MSC Mission Support Center (Space Station) MSC mobile service carrier MSC mobile service center MSC moding, sequencing, and control MSCB Manufacturing Status Control Board MSCL Measurement Standards and Calibration Laboratory MSCR measurements/stimuli change request MSCS mobile service center system MSD Missile Systems Division MSD Mission Support Directorate MSD mission systems data MSDOS mass storage digital operating system MSDP mission system distribution panel MSDS materials safety data sheet MSDS multispectral scanner and data system MSDT multiple Shuttle data tape MSE maintenance support equipment MSE manned space flight engineer MSE measuring and stimuli equipment MSE mechanical support equipment MSE medical support equipment MSE mission staff engineer MSE mission support equipment MSEC master separation events controller MSF maintenance source file MSF manned space flight MSFC Marshall Space Flight Center (NASA) MSFN manned space flight network MSFP manned space flight program MSFSG Manned Space Flight Support Group MSG Maintenance Steering Group MSG Maintenance Study Group MSG Mechanical Subsystem Group MSG Mission Support Group MSI maintenance-significant item MSI medium-scale integration MSIA multispectral image analyzer MSID master stimulus identification document MSID measurement and stimulus identification MSID measurement stimulation identification MSID measurement stimulus identification MSIF multisystem integration facility MSIS man-systems integration standards MSK M-ary shift keying MSK manual select keyboard MSL master system library MSL Materials Science Laboratory MSL mean sea level MSL Mechanical Systems Laboratory MSL mode select logic MSLD mass spectrometer leak detector MSM manned support module MSME Master of Science degree in mechanical engineering MSMP manned support module program MSMP multispectral measurements program MSO Manufacturing Safety Office MSO model for spares optimization MSOB Manned Spacecraft Operations Building MSOCC Multisatellite Operations Control Center MSOIN minor subcontractor or IDWA notification MSP Mission Security Panel MSP mission sequence plan MSP mission support plan MSR measurement stimuli request MSR measurements support request MSR Mission Support Room MSRP mission support real property MSS maintenance status system MSS mobile service structure MSS mobile servicing system MSS multispectral scanner system MSS multisystem software MSS Manufacturers' Standardization Society MSS mass storage subsystem MSS mechanical support system MSS medium/small satellite servicing MSS meeting support system MSS message source selector MSS mission specialist station MSS mission status summary MSSRV Mars surface-sample return vehicle MSSTM military space system technology model MSSTP Military Space Systems Technology Plan MST measurement status table MST mobile service tower MST mountain standard time MSU main storage unit MSU mass storage unit MSU measuring stimuli unit MSV mission support vehicle MSV monitored sine vibration (test) MSVP master Shuttle verification plan MT magnetic tape MT metric ton MT mission time MT mission timer MT mission trajectory MT mobile transfer MT mobile transporter MT mountain time MT man-tended MT master timer MT master tool MT maximum torque MT mean time MT mechanical technician MT megaton MT member traceability MT&SCDSS materials technology and structural concepts for dsystems MTA maintenance task analysis MTA major test article MTA mass thermal analysis MTAP multitask analysis program MTB materials testing branch MTBCF mean time between critical failures MTBD mean time between demand MTBF mean time between failures MTBM mean time between maintenance MTBMA mean time between maintenance action MTBR mean time between removal MTBR mean time between replacement MTC man-tended capability MTC manual thrust controller MTC manual traffic control MTC master thrust control (controller) MTC mission and traffic control MTCA monitor and test control area MTCU magnetic tape control unit MTE maintenance test equipment MTE multisystem test equipment MTEC maintenance test equipment catalog MTEE maintenance test equipment, electrical MTEF maintenance test equipment, fluid MTEM maintenance test equipment module MTEM maintenance test equipment, mechanical MTEO maintenance test equipment, optical MTFF man-tended free flyer MTFO modular training field option MTG master timing generator MTGP monitor table generator program MTGW maximum total gross weight MTI Morton Thiokol, Incorporated MTI moving-target indicator MTK mechanical timekeeping MTK mechanized timekeeping MTL main transfer line MTLP monitor table listing program MTM mechanical test model MTM method of task measurement MTM methods time measurement MTM multiterminal monitor MTMO Mated Test Management Office MTO magnetic tape operator MTO master timing oscillator MTO maximum time-out MTO mission task objective MTO Mississippi Test Operations MTO modification task outline MTOGW maximum takeoff gross weight MTOW maximum takeoff weight MTP manufacturing technical procedure MTP master test plan MTP mission test plan MTR magnetic tape recorder MTRD master test requirement document MTS magnetic tape station MTS magnetic tape system MTS main thruster subsystem MTS master timing system MTS member, technical staff MTS metric time system MTS mobile tracking station MTS motor-operated transfer switch MTT maximum touch temperature MTTA mean time to accomplish MTTE mean time to exchange MTTF mean time to failure MTTFF mean time to first failure MTTR mean time to repair MTTRF mean time to restore function MTU magnetic tape unit MTU master timing unit MTU mobile training unit MTV mass transfer vehicle MTV Mars Transfer Vehicle (SLS) MTVC manual thrust vector control MTW maximum taxi weight MU master unit MU mobile unit MU mockup MU multiple unit MUA materials usage agreement MUA maximum usable altitude MUA mutual usage agreement MUC Muchea, Australia MUF maximum usable frequency MUL mission-unique list MUPPS mission-unique planning and processing schedule MUR manpower utilization report MUS mission-unique software MUSAT Canadian government satellite MUSS module utility support structure MUX multiplex MUX multiplexer MV manual valve MV manufacturing verification MVA megavolt ampere MVAS multipurpose ventricular actuating system MVC manual volume control MVC master volume control MVD map and visual display MVF manned vertical flight MVGVT mated vertical ground vibration test MVM Mariner Venus/Mercury MVP master verification plan MVR measurement velocity radial MVS middle-value select MVS midvalue selected MVS multiple virtual storage MVWT mated vehicle wind tunnel MW man-week MW microwave MWB master workbook MWD material withdrawal document MWG Maintainability Working Group MWIR medium-wavelength infrared MWOR maintenance work order request MWP maximum working pressure MWPR monthly work package report MWR mean width ratio MWS missile weapon system MWV maximum working voltage MY man-year MYTA maintainability task analysis MYVAL maintainability evaluation MZFW maximum zero fuel weight Mb megabit Mb megabyte Mb/s megabits per second Mbps megabits per second MeV megaelectron volt Mips million instructions per second Mips millions of instructions per second Mops million operations per second N Newton N&G navigation and guidance N-S Navier-Stokes N/A next assembly N/A not applicable N/A Nova interface adapter N/B narrow band N/C normally closed N/C nose cone N/C not critical N/C numerical control N/C numerically controlled N/D need date N/FTS near-/far-term system N/L no limit N/O normally open N/P not provided N/R not required N/W network N/m2 Newtons per meter squared N2H2 hydrazine N2O4 nitrogen tetroxide NA next action NA nodal architect NA not applicable NA numerical aperture NAA North American Aircraft NAACP National Association for the Advancement of Colored People NAAL North American Aerodynamic Laboratory (wind tunnel) NAC Naval Avionics Center NAD network adapter device NAEC Naval Air Engineering Center NAM National Association of Manufacturers NAM nuclear assessment methodology NAP navigation analysis program NAR numerical analysis research NARS National Archives and Record Services NAS National Academy of Sciences NAS national aircraft standard NAS national airspace system NAS naval air station NAS nonavionics simulator NAS numerical aerodynamic simulation NASA National Aeronautics and Space Administration NASCOM NASA communications (network) NASDA National Space Development Agency (Japan) NASO North American Space Operations NASP National AeroSpace Plane NASTRAN NASA structural analysis program NAT nonconformance action team NATF Naval Air Test Facility NATO North Atlantic Treaty Organization NAUI National Association of Underwater Instructors NAVAID navigation aid NAVDAD navigational derived air data NAVEX navigation expert NAVPOOL navigation parameter common pool NAVSAT navigation satellite NAVSIM autonomous navigation simulator NAVT NASA altimeter verification telemetry NB narrow band NB navigation base NB nitrogen base NB no bias (relay) NBA narrow-band amplifier NBA NSTS berthing adapter NBDL Naval Bio-Dynamics Laboratory NBF Neutral Buoyancy Facility NBOSS new-business operations support system NBS National Bureau of Standards NBS neutral buoyancy simulation NBSAMRF National Bureau of Standards Advanced Research Facility NBT neutral buoyancy trainer NC national course NC no change NC no comment NC noise criteria NC normal corrective NC normally closed NC numerical control NC numerically controlled NC1 nominal correction 1 (phasing maneuver) NCA National Command Authority NCC NASA class code NCC NASA Communications Control NCC Navstar Control Center NCC Network Control Center (GSFC) NCC nominal corrective combination (maneuver) NCC normal corrective combination (maneuver) NCC NTB Control Center NCG noncondensible gas NCG Nuclear Criteria Group NCIU network common interface unit NCMC NORAD Cheyenne Mountain Complex NCO numerically controlled oscillator NCOS National Commission on Space NCR no calibration required NCR nonconformance/failure report NCS network control station NCS nutation control system NCSC National Computer Security Center NCU nozzle control unit ND NASA document ND neutral density ND nondimensional NDE nondestructive evaluation NDI nondestructive inspection NDRO nondestructive readout NDS network distribution service NDS nuclear detection system NDST nondimensional special tool NDT nondestructive test NDT nondestructive testing NDTF nondestructive test facility NDTL nondestructive test laboratory NDU navigation data unit NDUS NUDET detection user segment NDV NASP-derived vehicle NEA noise equivalent angle NEACP National Emergency Airborne Command Post NEAX noise equivalent change in translation NEC national electrical code NEEDS NASA end-to-end data system NEFD noise equivalent flux density NEI noise equivalent irradiance NEI nonexplosive initiation NELS nuclear effects link simulator NEMS NASA equipment management system NENU nonexempt, nonunion NEP noise equivalent power NEP nominal entry point NEP normal entry point NERVA nuclear engine for rocket vehicle application NES network encryption system NESC national electrical safety code NESP Naval Extremely High Frequency Satellite Program NESR natural environment support room NESS National Environmental Satellite Service NEST nuclear emergency search team NET NASA employee team NET Nimbus Experiment team NET noise equivalent target NET noise equivalent temperature NETCOM network communications NETSIM network simulation NEU nonexempt, union NEVADA net energy verification and determination analyzer NEVS NASA equipment visibility system NEWS new engineering work schedule NEWS new engineering work system NF natural flood NF noise figure NFLNA noise figure low-noise amplifier NFPA National Fire Prevention Association NFS NASA FAR supplement NFS network file server NFS nozzle flow sensor NFW nonfuel-wasting NG narrow gauge NG nitrogen gauge NG nose gear NGC next-generation controller NGLS Next Generation Life Support NGS NUDET ground system NGT NASA ground terminal NH nominal height (adjust maneuver) NH normal height (adjust maneuver) NH&S nuclear hardening and survivability NH4 hydrazine NHA next higher assembly NHB NASA Handbook NHC National Hurricane Center NIB noninterference basis NIC not in contract NICE Navstar interface control equipment NIDS network interface data system NIM nuclear instrumentation module NIOSH National Institute for Occupational Safety and Health NIP network input processor NIP network interface processor NISS national integrated scheduling system NIU network interface unit NJP network job processing NL no limit NL nose left NLA next lower assembly NLD Network Logistics Depot NLG nose landing gear NLGD nose landing gear door NLM nonlinear material NLRB National Labor Relations Board NLT not later than NLT not less than NM network manager (GSFC) NM nonmetallic NMA National Management Association NMAB National Materials Advisory Board NMC National Meteorological Center NMCC National Military Command Center NMI NASA management instruction NMO normal manual operation NMOS negative-type metal oxide semiconductor NMR nuclear magnetic resonance NMT not more than NMT notification of master tool NMTA National Metal Trades Association NMTBA National Machine Tool Builders' Association NMTS next manned transportation system NMV nitrogen manual valve NNK nonnuclear kill NO nitrous oxide NO normally open NOAA National Oceanic and Atmospheric Administration NOC network operation control NOC not otherwise coded NOC notation of content NOCC Network Operations Control Center (GSFC) NOD notice of discrepancy NOES National Operational Environmental Satellite NOM network output multiplexer NOMOCALC spectral nomographic calculator NOP normal operating procedure NOPAR non-OPPL part approval requests NOPAR nonorbiter parts authorization request NOR notice of revision NORAD North American Air Defense Command NORDSAT Scandinavian countries' broadcast satellite NOS network operating system NOSL night/day optical survey of thunderstorm lightning NOSP near-object scanning probe NOSP network operations support plan NOSS National Oceanic Satellite System NOTS Naval Ordnance Test Station NP navigation payload NP network program NP not provided NPB neutral particle beam NPC NASA procurement circular NPC NASA publication control NPC normal plane change NPD NASA policy directive NPD nominal percent defective NPDS nuclear particle detection subsystem NPF Navstar processing facility NPG naval proving ground NPL normal power level (see RPL) NPN NASA part number NPRV nitrogen pressure relief valve NPS NASA planning studies NPS nonpropulsive stage NPSH net positive suction head NPSP net positive static pressure NPSP net positive suction pressure NPSS NASA packet switching system NPT Navy pointer and tracker NPU nitrogen purge unit NPV nitrogen pressure valve NR noise rating NR nose right NR not required NRALT NASA radar altimeter NRB nuclear reactor/Brayton NRC National Research Council NRC Nitrosso rubber coating NRC nonrecurring costs NRCC National Research Council of Canada NRD National Range Division NRDS Nuclear Rocket Development Station (NASA) NRFA navigation radio frequency assembly NRI nonrecurring investment NRL Naval Research Laboratory NRM nonrecurring maintenance NRP normal rated power NRS nonconformance reporting system NRT near real time NRTS not repairable at this station NRZ nonreturn to zero NRZ-L nonreturn-to-zero level NRZ-PSK nonreturn-to-zero phase shift key NRZ-TTL nonreturn-to-zero transistor-transistor logic NS nickel steel NS not switchable NS nuclear Shuttle NSA National Security Agency NSA National Standards Association NSA nosewheel steering amplifier NSACOR National Security Agency Central Office of Record NSAS NSTS/SSPE attachment systems NSC NASA standard computer NSC navigational star catalog NSC Network Support Committee NSC nonstandard CA code NSCCA nuclear safety cross-check analysis NSD NASA standard detonator NSE nosewheel steering enable NSHS nosewheel steering hydraulic system NSI NASA standard initiator NSI network support item NSI-I NASA standard initiator Type I NSIA National Security Industrial Association NSIF Near-Space Instrumentation Facility NSL Northrop Space Laboratory NSLD NASA Shuttle Logistics Depot NSM network status monitor NSN national stock number NSO NASA support operation NSP NASA support plan NSP network signal processing NSP network signal processor NSPAR nonstandard part approval request NSR nominal slow rate NSR normal slow rate (maneuver) NSR1 first coelliptic maneuver NSR2 second coelliptic maneuver NSS network simulation system NSSCC NORAD Space Surveillance Computation Center NSSDC National Space Science Data Center NSTI NASA simulation traffic interface NSTL National Space Technology Laboratories (now John C. Stennis Space Center) NSTS National Space Transportation System NSTSPO NSTS Program Office NSU node switching unit NSY nonstandard Y code NT&A no test and ancillary NTB National Test Bed NTBOS NTB operating software NTBSIM NTB simulation NTD NASA test director NTE navigation telemetry encoder NTF National Test Facility NTIS National Technical Information Service NTO nitrogen tetroxide NTO nitrous oxide NTP network test panel NTP normal temperature and pressure NTP notice to proceed NTR Nuclear Thermal Rocket NTS navigation technology satellite NTS near-term schedule NTS nonavionics test station NTS not to scale NTSO NASA Test Support Office NTSS nitrogen transfer and storage system NTTF network test and training facility NUDET nuclear detonation NUL non-GSE utilization list NUTI NASCOM user traffic interface NV NASA altimeter verification NV nuclear vehicle NVAFB North Vandenberg Air Force Base NVE nonvisual eyepiece NVEOL Night Vision and Electro-Optical Laboratory NVM nonvolatile memory NVR NASA waiver NVR no verification required NVR no voltage release NVR nonvolatile residue NW nosewheel NWE nuclear weapons effect NWG natural work group NWMP nuclear weapons monitor plan NWS National Weather Service NWS nosewheel steering NWSA nosewheel steering amplifier NWT nonwatertight NWU north, west, up NWW nosewheel well NX normal to X-axis NX nose to X-axis NY normal to Y-axis NY nose to Y-axis NZ normal acceleration NZ normal load factor (g) NZ normal to Z-axis NZ nose to Z-axis NZB nonzero binary Nd:YAG neodymium:yttrium aluminum garnet O&C operations and checkout O&C operations and control O&FS operations and flight support O&M operations and maintenance O&P operations and procedures O&R overhaul and repair O&S operational and support O&S operations and support O/B on board O/B operational base O/C operations critical O/D on dock O/D outside diameter O/F oxidizer-to-fuel ratio O/L overload O/L-RC overload reverse current O/R outside radius O/R oxygen relief O/V overvoltage O/V-U/V overvoltage/undervoltage OA Office of Applications OA omnidirectional antenna OA operational aft OA operational instrumentation MDM aft OA orbit adjust (telemetry) OA orbiter assembly OA output axis OA overall OAA orbiter access arm OAA orbiter alternate airfield OAA ORU alternative analysis OAB Ordnance and Assembly Building OAFD orbiter aft flight deck OAFTO Orbiter Atmospheric Flight Test Office OAHTS orbiter avionics hardware tracking system OAL overall level OALC Ogden Air Logistics Center OAME orbital attitude and maneuvering electronics OAMP Optical Airborne Measurements Program OAMS orbital attitude and maneuvering system OAO orbital astronomical observatory OAR off-axis rejection OARE Orbital Acceleration Research Experiment OARME Oxygen Atom Reaction Materials Experiment OARS Orbiter Avionics Radiation Specification OAS office automation system OAS optical assembly simulator OAS orbiter aeroflight simulator OAS orbiter atmospheric simulator OAS orbiter avionics simulator OAS orbiter avionics system OASCB Orbiter Avionics Software Control Board OASIS oceanic and atmospheric scientific information system OASIS Orbit Avionics Software Integration Study (IBM's) OASIS orbiter experiment autonomous supporting instrumentation OASM Office of Aerospace Medicine (NASA) OASPL overall sound pressure level OAST Office of Aeronautics and Space Technology OAT operational acceptance test OAT overall test OATS orbiter avionics tracking system OB on board OB operational base OB outboard OBC on-board checkout OBC on-board computer OBCO on-board checkout OBCP on-board computer program OBCS on-board checkout subsystem OBDU on-board diagnostic unit OBS operational bioinstrumentation system OBS operational biomed sensor OBS operational biomedical system OBV oxidizer bleed valve OC on center OC on condition OC open circuit OC orbital check OC over center OC overcurrent OCA orbiter capability analysis OCA orbiter capability assessment OCAC orbiter cabin air cleaner OCALC Oklahoma City Air Logistics Center OCB operational configuration baseline OCC Office of Contract Compliance OCC Operations Control Center OCCP orbit command computer program OCCS operator control console subsystem OCD operational concept document OCD operations concept documentation OCDR orbiter critical design review OCDU optics coupling data unit (G&N) OCE Ocean Color Experiment OCF on-board computational facility OCF orbiter computational facilities OCH orbiter common hardware OCI organizational conflict of interest OCM optical countermeasure OCN operation control number OCN order change number OCN order control number OCO OMS cutoff OCO open-close-open OCP Office of Commercial Programs OCP operations checkout procedure OCP output control pulse OCR operational capability readiness OCR operational concept review OCR optical character reader OCR optical character recognition OCS on-board checkout system OCS operational control segment OCU ordnance control unit OD observational data (telemetry) OD operational downlink OD operations directive OD operations director OD outside diameter OD oxygen drain OD&E operational demonstration and evaluation ODA optical diagnostic assembly ODB operational data base ODB operational data book ODC other direct costs ODCDR orbiter delta CDR ODDL on-board digital data load ODDP object-dependent data processor ODDS operational data delivery services ODDTE Office of the Director, Defense Test and Evaluation ODE operational demonstration and evaluation ODES Optical Discrimination Evaluation Study ODF orbit determination facility ODF output data formatter ODIN orbital design integration system ODM orbiter disconnect mechanism ODOP offset Doppler (tracking system) ODP operational display procedure ODR output data redundancy ODRAN operational drawing revision advance notice ODRC Orbiter Data Reduction Center ODU output display unit OEAS orbital emergency arresting system OEC other early capability OECO outboard engine cutoff OEM original equipment manufacturer OEPS operationally efficient propulsion system OES orbiter emergency site OESS orbiter/ET separation system OET orbiter engineering and test OEX orbiter experiment OEXP Office of Exploration OF operational forward DSC or MDM OF operational instrumentation MDM forward OF orbital flight OF outside face OF oxygen fill OFCC Office of Federal Contract Compliance OFCCP Office of Federal Contract Compliance Programs OFDS orbiter flight dynamic simulator OFDS oxygen fluid distribution system OFI operational flight instrumentation OFK optical flight kit OFP operational flight profile OFP operational flight program OFP orbiter flight program OFS orbital flight system OFS orbiter flight simulator OFS orbiter flight system OFS orbiter functional simulator OFT operational flight test OFT orbital flight test OFT orbital flight training OFTDS orbital flight test data system OFVR out-of-field-of-view rejection OG outer gimbal (roll) OG oxygen gage OGA outer gimbal angle OGA outer gimbal axis OGE operating ground equipment OGMT orbiter Greenwich mean time OGTM one-g trainer and mockup OGV oxygen gage valve OH overhaul OH overhead OHA operating hazard analysis OHA orbital height adjustment maneuver OHC optics hand controller OHF occupational health facility OHGVT orbital horizontal ground vibration test OI operating instruction OI operational increment (software) OI operational instrumentation OI operations interface OI orbiter insertion OI orbiter instrumentation OIA Office of Internal Affairs OIA Office of International Affairs OIA orbiter interface adapter OIB Operating Improvement Board OIC orbital integrated checkout OIDB OI data base OIE orbiter integration engineering OII operations integration instruction OIO operations integration officer OIR open item report OIR operations integration review OIS operational intercommunication system OIS Optical Imager Study OIS orbit injection subsystem OIS orbit inserting system OIS orbit insertion subsystem OIS orbiter insertion system OIS orbiter instrumentation systems OISAR optical inverse synthetic-aperture radar OISR open item status report OISS open item status subsystem OISTP Oxygen-Iodine Supersonic Technology Program OIT orbiter integrated test OIT orbiter integration test OIT orbiter interface test OIV oxidizer isolation valve OIVS orbiter interface verification set OJT on-the-job training OL open loop OL operational left DSC or MDM OL overlay OL overload OLDB on-line data bank OLERD orbiter landing emergency rescue data OLF orbiter lifting frame OLIF Orbiter Landing Instrumentation Facility OLOW orbiter lift-off weight OLSA orbiter/LPS signal adapter OLSP Orbiter Logistics Support Plan OM office management OM operational mid DSC or MDM OM operations manager OM optical master OM outer marker (ILS) OMA operations maintenance area OMA operations management application OMA orbiter maintenance area OMAS operations management application software OMB Office of Management and Budget OMBUU orbiter midbody umbilical unit OMCF operations and maintenance control file OMCF Orbiter Maintenance and Checkout Facility OMCS operations and maintenance communications system OMD operations and maintenance documentation OMDR operations and maintenance data record OME orbital maneuvering engine OME orbiter main engine OMET orbiter mission elapsed time OMEWG Orbiter Maintenance Engineering Working Group OMGA operations management ground application OMI operations and maintenance instruction OMIJC operations and maintenance instruction job card OMISS operation and maintenance instruction summary sheet OMK orbiter mission kit OML orbiter mold line OML outer mold line OMMH orbiter maintenance man-hour OMP operating maintenance plan OMP operations and maintenance plan OMPR operational maintainability problem reporting OMPT observed mass point trajectory OMR operations and maintenance requirement OMR operations management room OMR orbiter management review OMRB Operating Material Review Board OMRC operational maintenance requirements catalog OMRF Orbiter Maintenance and Refurbishment Facility OMRF Orbiter Modification and Refurbishment Facility OMRP operations and maintenance requirements plan OMRS operations and maintenance requirements and specifications OMRS operations and maintenance requirements system OMRSCB Operations and Maintenance Requirements and Control Board OMRSD operations and maintenance requirements and specifications document OMS operations management system OMS orbital maneuvering system (subsystem) OMSP operational maintenance support plan OMU optical measuring unit OMV orbital maneuvering vehicle OMV oxygen manual valve ONBT orbiter neutral buoyancy trainer OND operator need date ONR Office of Naval Research ONSCOSTS operation and support costs model OOD object-oriented data base OOD object-oriented design OOD orbiter on dock OODP out-of-detent pitch OODR out-of-detent roll OOH Orbital Operations Handbook OOMM Organizational Operations and Maintenance Manual OOP out of position OOR on-orbit review OOS on-orbit station OOS orbit-to-orbit Shuttle OOS orbit-to-orbit stage OOSD on-orbit support document OOSD orbital operations support document OOSDP on-orbit station distribution panel OOSS on-orbit support system OOT out of tolerance OP operating procedure OP oxygen purge OP&R operations planning and requirements OPA operations planning analysis OPB oxidizer preburner OPBOV oxidizer preburner oxidizer valve OPBS orbiter payload bay simulator OPD optical path difference OPDAR optical detection and ranging OPE operational processing equipment OPE other project element OPEIU Office and Professional Employees International Union OPF Orbiter Processing Facility OPGUID optimum guidance technique OPI operations procedure instruction OPI orbiter payload interrogator OPIDF operational planning identification file OPIS orbiter prime item specification OPL open problem list OPL orbiter project parts list OPLF Orbiter Processing and Landing Facility OPM Operations Procedure Manual OPM outer planet mission OPO Orbiter Project Office OPOV oxidizer preburner oxidizer valve OPP other physical principles OPPAR orbiter project parts authorization request OPPG operating program (DIU) OPPS operations planning and project support OPR office of primary responsibility OPR operations planning review OPR orbiter payload recorder OPR oxygen pressure regulator OPRV oxygen pressure relief valve OPS operational sequence OPS orbiter project schedule OPS oxygen purge system OPSDB operations data base OPSDBA operations data base administrator OPSS orbital propellant storage subsystem OPT operational pressure transducer OPTB operational program time base OPWS orbital payload work station OR operational right DSC or MDM OR operations requirement OR operations review OR operations room OR outer roll OR oxygen relief ORA operational requirements analysis ORACLES optical regulator algorithms for the control ORAM output random access memory ORB Operations Review Board ORC operations request card ORCHIS Oak Ridge computerized hierarchical information system ORCUS orbital recording capability and update system ORD operational readiness data ORD operational ready data ORD operations requirements document ORD orbital requirements document ORE output request element OREO OMS/RCS engineering officer ORI operational readiness inspection ORLA optimum repair level analysis ORP OFS retransmission processor ORR operational readiness review ORR operations requirements review ORR Orroval Valley, Australia (STDN) ORS orbital refueling system ORS orbital reservicing system ORS orbital resupply system ORSDI Oak Ridge selective dissemination of information ORT operational readiness test ORT orbit readiness test ORU orbital replaceable unit ORU orbital replacement unit ORV orbital research vehicle OS on-orbit station OS operating software OS operating system OS orbiter CEI specification OSA operational support area OSC Operations Support Center OSC Operations Support Contract OSC optical signatures code OSCF Operations Support Computing Facility OSCN orbiter specification change notice OSCR orbiter software change request OSCRS orbital spacecraft consumables resupply system OSD Office of the Secretary of Defense OSDH Orbiter System Definition Handbook OSE operating support equipment OSE orbital support equipment OSE orbiter support equipment OSE other support equipment OSEC operations security OSES operation support equipment/software OSF orbiter simulation facility OSF ordnance storage facility OSHA Occupational Safety and Health Act OSHA Occupational Safety and Health Administration OSHA operating and support hazard analysis OSI open system interconnect OSI open systems interconnection OSID operating system interface definition OSLM operations shop or lab manager OSM on-orbit spares model OSM operational status monitoring OSM orbiter service module OSMP operational support maintenance plan OSO ocean systems operation OSO orbiting solar observatory OSOP orbiter systems operating procedure OSR operations support room OSR optical surface reflector OSRBD operational software reliability benchmark development OSS Office of Space Sciences OSS operational SDI system OSS optics subsystem OSS orbiting space station OSSA Office of Space Sciences and Applications OSSIU orbiter-Space Station interface unit OSSRH Orbiter Subsystem Requirements Handbook OST Operations Support Team (GSFC) OST orbiter support trolley OSTA Office of Space and Terrestrial Applications OSTDS Office of Space Tracking and Data Systems OSTF off-site test facility OSTO Office of Space Transportation Operations OSTP orbiting system test plan OSTS Office of Space Transportation Systems OT offensive threat OT operating time OT operational instrumentation MDM tank OT operational test OT operational trajectory OT optical tracker OT out temperature OT overtime OT&E operational test and evaluation OT&E optical test and evaluation OTA operational trajectory analysis OTA optical telescope assembly OTB orbiting tanker base OTC optical test chamber OTC orbiter test conductor OTD operational technical documentation OTD orbiter test director OTDA Office of Tracking and Data Acquisition OTE optical test and evaluation OTE orbital transfer equipment OTEC Operational Test and Evaluation Center OTF operational time fraction OTF optical transfer function OTH over the horizon (radar) OTH-B over-the-horizon backscatter OTK oxidizer tank OTL ordnance test laboratory OTLC orbiter time line constraint OTM output transformation matrix OTO one time only OTOS orbit-to-orbit stage OTP operational test procedure OTP operations turnaround plan OTR operating time record OTS off the shelf OTS orbital test system OTS orbital transfer system OTS orbiter transfer system OTT optional team targeting OTV operational television OTV orbit test vehicle OTV orbital transfer vehicle OUP OFS uplink processor OUSDR&E Office of the Undersecretary of Defense, Engineering OUT orbiter utility tray OV orbiter vehicle OV oxygen vent OVCO Operational Voice Communication Office OVDS oxidizer vent drain system OVEI orbiter vehicle end item OVI operational validation inspection OW optical window OW order wire OWD one-way Doppler OWDE one-way Doppler extraction OWF optimum working frequency Orion communications satellite for service over the Atlantic Ocean P precision navigation signal P protected signal P roll rate (angular rate) P&C Procurement and Contracts (MSFC) P&D panels and displays P&E pricing and estimating P&E propellant and explosive P&I performance and interface P&LRP productivity and long-range planning P&M production and maintenance P&MD productivity and manufacturing development P&P policies and procedures P&PQ productivity and product quality P&PQI productivity and product quality improvement P&PQIC Productivity and Product Quality Improvement Council P&Q productivity and quality P&R performance and resources P&SM procurement and subcontract management P&TE packaging and transport engineering P&VE propulsion and vehicle engineering P(Ls) probability of launch success P-P peak to peak P/A pressure-actuated P/A problem analysis P/B piggyback P/B playback electronics P/C pay code P/CI payload/cargo integration P/L parts list P/L payload P/L postlanding P/L purchased labor P/N part number P/O provisioning order P/OF pinhole/occulter facility P/P patch panel P/P prelaunch and postlanding P/P printer/plotter P/PL primary payload P/S parallel to serial P/S power supply P/T prototype P/W password P/Y pitch/yaw P2I preplanned productivity increase P3I preplanned product improvement P3I preplanned production improvement PA pad abort PA paging and area warning PA power amplifier PA precision angle PA primary amplifier PA product assurance PA public address PA public affairs PA pulse amplifier PAA Pan American Airlines PAA problem assessment area PABF Precision Air Bearing Facility PAC postaward conference PAC pressure alpha center PAC probe aerodynamic center PAC Problem Action Center PAC program analyzer console PACA payload accommodation configuration assessment PACAS personnel access control accountability system PACC PERT-associated cost control PACC Problem Action Control Center PACCS postattack command control system PACE power and control electronics PACE prelaunch automatic checkout equipment PACE producible alternative to cadmium-telluride epitaxy PACE product acceptance configuration element PACK payload active cooling kit PACO parts control PACO prelaunch automatic checkout PACRUSS passive and active control of space structures PACS pointing and attitude control system PAD preliminary advisory data (crew data uplink) PAD program approval document PAD propellant acquisition device PAD pulse amplitude detector PADS problem action data system PADSIM precision attitude determination simulation PAE preventive action engineer PAE problem assessment engineering PAF payload attach fitting PAF peak annual funding PAFB Patrick Air Force Base PAH Payload Accommodations Handbook PAIS product assurance information system PAL lower port pressure PAL parts authorization list PALAPA Indonesian communication satellite PALS photo area and location system PALS precision approach and landing system PAM payload assist module PAM propulsion avionics module PAM pulse amplifier modulation PAM pulse amplitude modulation PAM-A payload assist module, Atlas-Centaur class PAM-D payload assist module, Delta class PAM500 payload assist module, test equipment PAMB pressure ambient PAN polyacrylonitrile PAN probabilistic analysis network PAO Public Affairs Office (NASA) PAP payload accommodation plan PAP payload adapter plate PAP personnel assurance program PAP product assurance plan PAPI precision approach path indicator PAPL project-approved parts list PAR planning action request PAR precision approach radar PAR problem accountability record PAR problem action report PAR problem action request PAR product acceptance review PARB Problem Assessment Review Board PARS property accountability record system PARS property accounting and reporting system PAS payload accommodation study PAS primary alerting system PAS problem assessment system PAS productivity, affordability, and supportability PASR problem analysis status report PASS planning and scheduling system PASS primary avionics and software subsystem PASS primary avionics software system PAT problem action team PAT production acceptance test PATE performance analysis, test, and evaluation PATH performance analysis and test history PATH postflight attitude and trajectory history PATHS precursor above-the-horizon sensor PATP preliminary authority to proceed PATRAN patches to NASTRAN PATRAN trademark of Prototype Development Associates Engineering PATS payload avionics test station PATS program for analysis of time series PAU probe aerodynamic upper PAU upper port pressure PAV pressure-actuated valve PAW plasma arc welding PAWS personal Atlas work station PB phonetically balanced PB playback PB preburner PB push button PBAN polybutadiene arcylonitrile PBD payload bay door PBDF payload bay door forward PBDM payload bay door mechanism PBI polybenzimidezole PBI push-button indicator PBIC programmable buffer interface card PBIM programmable buffer interface module PBK payload bay kit PBL payload bay liner PBM program business management PBP preburner pump PBPS postboost propulsion system PBS payload berthing system PBS program breakdown structure PBS protective breathing system PBTS payload bay transfer system PBV postboost vehicle PBW particle-beam weapon PBW proportional bandwidth PBX private branch exchange (telephone) PC personal computer PC propulsive consumables PC pulsating current PC phase coherent PC photoconductive PC pitch circle PC pitch control PC plane change PC printed circuit PC program counter PC project control PC&PM program control and performance management PCA performance coverage analyzer PCA physical configuration audit PCA pitch control assembly PCA pneumatic control assembly PCA point of closest approach PCA polar cap absorption PCA power conditioning assembly PCA power controller assembly PCA production configuration audit PCAM punched-card accounting machine PCASS program compliance assurance and status system PCB Parts Control Board PCB polyvinyl chloride-bromide (toxic transformer coolant) PCB power circuit breaker PCB power control box PCB printed circuit board PCB product configuration baseline PCB Program Change Board PCC pad control center PCC payload control and checkout PCC production control center PCCB Program Change Control Board PCCB Program Configuration Control Board PCCE payload common communication equipment PCCM program change control management PCCN provisioning contract control number PCCP preliminary contract change proposal PCD procurement control document PCDU payload command decoder unit PCE power conditioning electronics PCE power conditioning equipment PCF payload control facility PCG Parts Control Group PCG phonocardiogram PCG protein crystal growth PCI peripheral controller interface PCI procedure change instruction PCI program-controlled input PCIL pilot-controlled instrument landing PCIN program change identification number PCK payload command kit PCL power control list PCL primary coolant line PCL primary coolant loop PCL programming checklist PCM parts control management PCM photoelectric cell module PCM pitch control motor PCM plane change mechanism PCM power control mission PCM pulse code modulation PCM pulse code modulator PCM punch card machine PCMD pulse code modulation, digital PCME pulse code modulation event PCMMU pulse code modulation master unit PCMP Parts Control Management Program PCMR probability of correct message receipt PCMS pulse code modulation, shared PCMU programmable control and monitor unit PCN page change notice PCN polyester-coated nylon PCN program change notice PCN program control number PCO postcheckout PCO postcheckout operations PCO principal contracting officer PCO Procuring Contracting Office PCO procuring contracting officer PCO program contracting officer PCO program control officer PCO program-controlled output PCOT payload center operations team PCP power control panel PCP program change proposal PCP project change proposal PCP project cost plan PCPAS Patriot command post automation system PCPL proposed change-point line PCR payload changeout room PCR payload checkout room PCR payload clean room PCR power change request PCR procedure change request PCR program change request PCR project control room PCR publication change request PCRB Program Change Review Board (Rockwell launch operations) PCRB Project Change Review Board PCRS payload cover removal system PCRS performance and cost report system PCS Pacific command ship PCS primary control station PCS primary coolant system PCS probability of crew safety PCS procedure completion sheet PCS program control system PCS project control system PCS payload checkout system PCS payload control subsystem PCS payload control supervisor PCS performance control system PCS planning and control system PCS pointing control system PCS power conversion system PCS pressure control system PCT process control table PCTC Payload Crew Training Complex PCTE portable commercial test equipment PCTO payload cost tradeoff optimization PCTR pad connection terminal room PCU payload checkout unit PCU power condition unit PCU power conditioning unit PCU power control unit PCU power conversion unit PCU pressure control unit PCU process control unit PCV precheck verification PCV purge control valve PCVB pyro continuity verification box PCVL pilot-controlled visual landing PCZ physical control zone PD dependency factor PD program directive PD project directive PD project director PD propellant dispersal PD pitch diameter PD pitch down PD policy directive PD potential difference PD preliminary design PD probability of detection PD procurement drawing PD program development PD&RS payload deployment and retrieval subsystem PD/ID probability of detection and identification PDA parallel data adapter PDA payload disconnect assembly PDA percent defect allowed PDA post-DDT&E assessment PDA precision drive axis PDA propellant drain area PDA pump drive assembly PDAR program description and requirements PDB performance data book PDB power distribution box PDB project development brochure PDC power distribution control PDC predefined command PDC procurement document change PDCM product data control model PDCS power distribution and control subsystem PDCU power distribution and control unit PDD payload description document PDD program definition document PDD program description document PDE process directory entry PDES product data exchange specification PDES product data exchange standard PDF pocket dosimeter FEMA PDF probability density function PDGF power data grapple fixture PDH pocket dosimeter high PDI payload data interleaver PDL pocket dosimeter low PDL procedure distribution list PDL Product Development Laboratory PDL program description language PDL program design language PDLAC preliminary dynamic loads analysis cycle PDLC preliminary design load cycle PDM payload deployment module PDM probe data model PDM processor data monitor PDM pulse duration modulation PDOP position dilution of precision PDP payload data pack PDP postinsertion deorbit preparation PDP preliminary definition plan PDP procurement data package PDP program development plan PDP project definition phase PDR preliminary data requirements PDR preliminary design review PDR processed data recorder PDR program design review PDR program director's review PDRD procurement data requirements description PDRD procurement data requirements document PDRD program data requirement document PDRD program definition and requirements document PDRL preliminary design requirements list PDRL procurement data requirements list PDRM payload deployment and retrieval mechanism PDRR payload design requirements review PDRS payload data and retrieval system PDRS payload deployment and retrieval system PDRSS payload deployment and retrieval system simulation PDRSS payload deployment and retrieval system simulator PDS package data system PDS paradynamic sketch PDS partitioned data set PDS pathfinder demonstration satellite PDS power distribution system PDS problem data system PDS product distribution subsystem PDS production data sheet PDS pyrotechnic device simulator PDT payload data tape PDT product development team PDU pilot display unit PDU power drive unit PDU pressure distribution unit PDU pulse detection unit PDV premodulation processor, deep-space voice PDV pressure disconnect valve PE parity error PE payload element PE plasma effects PE processing element PE program element PE program exception PE project engineering PE project engineer PEA payload electronics assembly PEA preliminary environmental analysis PEAP personal egress air pack PEAR program explanation analysis required PEB Performance Evaluation Board PEB program element breakdown PEC proposal evaluation criteria PECP preliminary engineering change proposal PEDB payload engineering data base PEFU payload effects follow-up study PEG powered explicit guidance PEGASUS preliminary expert ground analysis scheduler PEIR project equipment inspection record PEM plant engineering and maintenance PEO Project Engineering Office PEP peak envelope power PEP plant engineering procedure PEP power extension package PEP Proposal Evaluation Panel PER preliminary engineering report PERP Parts and Equipment Reliability Program PERT program evaluation and review technique PERT-NAP PERT network automatic plotting PES photoelectric scanner PET performance enhancement team PET performance/endurance tradeoff PET phase elapsed time PET production environmental test PET program elapsed time PETA performance evaluation and trend analysis PETN petaerythrite tetranitrate PETS Performance Endurance Tradeoff Study PF parachute facility PF payload forward PF payload function PF power factor PF powered flight PF prime function PF probability of failure PF pulse frequency PFA Palmdale final assembly PFA probability of false alarm PFB payload feedback PFB payload forward bus PFB position feedback PFB pressure-fed booster PFC performance flight certification PFC postflight checklist PFC power factor corrector PFC preliminary flight configuration PFCF Payload Flight Control Facility PFCS primary flight control system PFF postfactory functional PFK payload function key PFL primary Freon loop PFL Propulsion Field Laboratory (Rocketdyne) PFM pulse frequency modulation PFN pulse forming network PFP powered flight program PFP probability of performance failure PFP program financial plan PFP programmable function panel PFR portable foot restraint PFRT preliminary flight rating test PFRX preflight relmat (X-l, 2, 3 . . . 9 or A, B, C . . . Z) PFS percent full scale PFS primary flight software PFS primary flight system PFT postflight testing PFTA payload flight test article PFV probability of failure of vehicle PG power generation PG pressure gauge PGA power generating assembly PGA pressure garment assembly PGA programmable gain amplifier PGC plant growth chamber PGD&CS power generation, distribution, and control subsystem PGHM payload ground handling mechanism PGNCS primary guidance, navigation, and control system PGOC Payload Ground Operations Contract (contractor) PGOR payload ground operations requirement PGORS Payload Ground Operations Requirements Study PGR planning ground rule (Spacelab) PGS power generation system (subsystem) PGSC payload and general-support computer PGSE payload ground support equipment PGU plant growth unit PGU power generating unit PGWG Particles and Gases Working Group PH personal hygiene PHA preliminary hazard analysis PHD payload handling device PHF parts history file PHF payload handling fixture PHF personal hygiene facility PHK personal hygiene kit PHMC probe heater motor controller PHP payload handling panel PHP planetary horizontal platform PHRR payload high-rate recorder PHS payload handling station PHS payload handling system PHS&T packaging, handling, storage, and transportation PHSF Payload Hazardous Servicing Facility PHST packaging, handling, storage, and transportation PHTR packaging, handling, and transportation record PI payload interrogator PI preliminary investigation PI principal investigator PI procurement item PI program introduction PI&A personnel identification and authentication PIA payload interface adapter PIA preinspection acceptance PIA preinstallation acceptance PIA project impact analysis PIAPACS psychophysical information acquisition, pontrol system PIAR project impact analysis report PIB Pyrotechnic Installation Building PIC Payload Integration Center PIC Payload Integration Committee PIC performance indicator chart PIC preinstallation checkout PIC programmable interval clock PIC pyrotechnic initiator circuit PIC pyrotechnic initiator controller PICC payload interface control computer PICP program interface control plan PICRS program information control and retrieval system PICRS program information coordination and review service PICS photo index and cataloging system PICS predefined input control sequence PID prime item development PID program information document PID program introduction document PID proportional-integral-derivative PIDA payload installation and deployment aid PIDP product initialization data pack PIDS portable image display system PIE payload integration equipment PIE payload interface engineer PIECP preliminary impact engineering change proposal PIF payload integration facility PIGA pendulous integrating gyroscopic accelerometer PII procurement instrument identification PIIN procurement instrument identification number PILOT program integration and loading tool PILS payload integration library system PILS payload interactive library system PIM payload integration manager PIM planning interchange meeting PIM pulse interval modulation PIMR program integration management review PIN personal identification number PINCH payload integration nominal cost hardware PIND particle impact and noise detection PIND particle impact noise detection PIO pilot-induced oscillation PIO Program Integration Office PIO provisioned item order PIO Public Information Office (MSFC) PIOL periodic input/output link PIOP payload integration operations plan PIP payload integration plan PIP payload interface plan PIP personnel incentive program PIP plant instrumentation program PIP production instrumentation package PIP project implementation plan PIP pyro interception plug PIPA pulse-integrating pendulum accelerometer PIPA pulse-integrating pendulum assembly PIPA pulsed integrating pendulous accelerometer PIR programming information requirement PIRCS payload interactive requirements collection system PIRD project instrumentation requirement document PIRN preliminary interface revision notice PIRN proposed interface revision notice PIT passive intermediate tracker PIT payload integration thermal PIT preinstallation test PITG Payload Integration Task Group PITS payload integration test set PITS payload interface test system PIU power interface unit PIU pyrotechnic initiator unit PIV peak inverse voltage PIVR payload interface verification requirement PIVS payload integration and verification simulator PIVS payload interface verification summary PK probability of kill PKD programmable keyboard and display PKM perigee kick motor PL parting line PL payload PL postlanding PL power level PL prelaunch PL private line PL propellant loading PLA parachute location aid PLACE position location aircraft communications equipment PLAN payload activity network PLB payload bay PLBD payload bay door PLC power line carrier PLC pressurized logistics carrier PLC programmable logic controller PLC propellant loading console PLCC Payload Launch Control Center PLCI pressurized logistics carrier interface PLD program listing document PLDF payload data file PLH payload handling PLHX payload heat exchanger PLI propellant-level indicator PLIC payload intelligent controller PLIM payload installation mechanism PLIM propellant linear insulation matrix PLIMHR payload integration management hardware review PLIMR payload integration management review PLINS payload integration schedule PLISN provisioning list item sequence number PLL phase lock loop PLM payload management PLM payload monitoring PLMS program logistics master schedule PLN program logic network PLOS probe line of sight PLPS propellant loading and pressurization system PLRV payload launch readiness verification PLS payload simulator PLS payload system PLS personnel launch system PLS postlanding and safing PLS primary landing site PLS propellant loading system PLSL propellants and life support laboratory PLSP payload signal processor PLSR postlaunch service review PLSS portable life support system PLT production lead time PLTS precision laser tracking system PLU position location uncertainty PLV payload vehicle PLV postlanding valve PLV postlanding ventilation PLVC postlanding vent control PM payload management PM preventive maintenance PM Procurement Management PM program management PM program manager PM project manager PM propulsion module PM pulse modulation PM payload midbody PM payload module PM performance management PM performance monitor PM permanent magnet PM phase modulation PM phase monitor PM Policy Manual PM&P parts, materials, and processes PMA performance monitor annunciator PMA preliminary mission analysis PMAC portable multipurpose applications console PMAD performance monitor annunciation driver PMAD power management and distribution PMALS preliminary miniature air-launched system PMAP performance monitor annunciation panel PMAT page map address table PMATS performance managing and tracking system PMB performance management baseline PMB performance measurement baseline PMC payload monitoring control PMC permanently manned capability PMC plutonia-molybdenum cermet PMC procurement method code PMD Palmdale (TACAN station) PMD power management and distribution PMD propellant management device PMDM payload multiplexer/demultiplexer PMEL Precision Measurements Equipment Laboratory PMF performance monitor function PMF perigee motor firing PMF program management facility PMG Parts Management Group PMHL preferred measurement hardware list PMI preventive maintenance instruction PMI principal maintenance inspector PMIA parallel multiplexer interface adapter PMIR program manager's integration review PMIS personal management information system PML preliminary materials list PMM planetary mission module PMM Property Management Manual PMMD programmable magnetic momentum dump PMN program management network PMO Program Management Office PMO program management organization PMOM Performance Management Operating Manual PMOMI preventive maintenance OMI PMON performance management operations network PMP parts, materials, and processes PMP performance management package PMP prelaunch monitor program PMP preliminary mission plan PMP premodulation processor PMP program management plan PMPAG PMP Advisory Group PMPCB Parts, Materials, and Processes Control Board PMPCB PMP Change Board PMPL preferred mechanical parts list PMPS program management performance system PMR Pacific Missile Range PMR parts material request PMR payload manifest review PMR payload manifesting review PMR payload mixing review PMR performance measurement report PMR program management review PMR program manager's review PMRB Primary Material Review Board PMRR premanufacturing readiness review PMS payload mounting structure PMS performance management system PMS performance measurement system PMS performance monitoring system PMS power management system PMS program management system PMS program master schedule PMT planning and management team PMT production monitoring test PMU plaster mockup PMU pressure measuring unit PMV permanent manned vehicle PMWO preventive maintenance work order PMYK program manager YK (AF) PN part number PN pseudonoise PNA plan of action PND passive nutation damper PND premodulation processor, near-Earth data PNP prenegotiation position PNS parabolized Navier-Stokes PNW program notes and waivers PO postorbit PO power on PO power oscillator PO project office PO purchase order POA plan of action POC Payload Operations Center POC point of contact POC proof of concept POC purchase order closeout POCC Payload Operations Control Center POCN purchase order change notice POD parameter override display POD Payload Operations Division (JSC) POD precision orbit determination POD production operations directive PODTG Precision Orbit Determination Task Group POE pilot operational equipment POE port of embarkation POGO Polar Orbiting Geophysical Observatory POGS polar-orbiting geomagnetic survey POI power-on/off interrupt POI product of inertia POI program of instruction POIC Payload Operations Integration Center POID power-on/off interrupt delay POL petroleum, oil, and lubricants POLAR production order location and record POLAR production order location and reporting POM pallet-only mode POM printer output microfilm POMS probability of mission success POMT planning operations management team POP perpendicular to orbit plane POP polar-orbiting platform POP preburner oxidizer pump POP preflight operations procedure POP prelaunch operations plan POP program operating plan POPU push-over/pull-up POR point of resolution POR power-on reset POR purchase order request PORB Production Operations Review Board PORCN production order records change notice PORD performance and operations requirements document PORR preliminary operations requirements review POS portable oxygen system POS probability of sufficiency POST payload operations support team POST Program To Optimize Simulated Trajectories POT proof of technology POT proximity operations trainer POV peak operating voltage POV pneumatically operated valve POV proximity operations vehicle POWG Payload Operations Working Group POWG Payload Orbital Working Group POWS project operating work statement PP partial pressure PP peak to peak PP planning package PP power plant PP premodulation processor PP push-pull PP&C program planning and control PP&C project planning and control PP&LS production planning and logistics support PP&WC process planning and work control PPA power pitch-around PPB program performance baseline PPB provisioning parts breakdown PPC Payload Preparation Complex PPC phased provisioning code PPC preprocessing center PPCO2 CO2 partial pressure PPCP postprocessing computer program PPCU partial payload checkout unit PPD power pitch-down PPD predefined process diagram PPE phase partitioning experiment PPE premodulation processor equipment PPEP plasma physics and environmental perturbation PPF payload processing facility (USAF) PPF primary processing facility PPI plan position indicator PPI proposal preparation instruction PPI pulse position indicator PPIL priced provisioned item list PPL planning parts list PPL preferred parts list PPL priced parts list PPL production payload PPL program parts list PPL provisioning parts list PPM payload project manager PPM pulse position modulation PPME Pacific plate motion experiment PPMS project performance measurement system PPO preferred provider organization PPO2 oxygen partial pressure PPP payload patch panel PPP peak pulse power PPQIC Productivity and Product Quality Improvement Council PPR payload preparation room PPR program planning review PPRB Preliminary Proposal Review Board PPS partial-pressure suit PPS payload pointing system PPS pneumatic power subsystem PPS primary propulsion system PPS printer/plotter system PPS product performance system PPS provisioning performance schedule PPS pulses per second PPSL program parts selection list PPT prelaunch package test PQA procurement quality assurance PQC procurement quality control PQC Product Quality Council PQE procurement quality engineering PQGS propellant quantity gauging system PQIC Product Quality Improvement Council PQIC Productivity and Quality Improvement Council PQT preliminary qualification test PR partially reusable PR purchase request PR performance report PR position record PR pressure ratio PR pressure regulator PR problem report PR procurement regulation PR program requirement PR pulse rate PRA precession axis PRACA problem reporting and corrective action PRACA problem reporting, analysis, and corrective action PRB Panel Review Board PRB Parachute Refurbishment Building PRB Paso Robles (TACAN station) PRB Program Review Board PRB program requirements baseline PRCB Program Requirements Change Board PRCB Program Requirements Control Board PRCB Program Review Control Board PRCBD Program Requirements Control Board directive PRCS primary reaction control system PRD payload requirements document PRD personal radiation dosimeter PRD preliminary requirements document PRD procurement regulation directive PRD procurement requirements document PRD program requirements document PRD project requirements document PRDA program research and development announcement PRE personal rescue enclosure PRE power regulation equipment PRF pulse repetition frequency PRIS payload remote integration system PRL page revision log PRL payload retention latch PRL priority rate limiting PRLA payload retention latch actuator PRLA payload retention latch assembly PRM payload retention mechanism PRM performance and reliability module PRM pocket radiation meter PRM posigrade rocket motor PRM pulse rate modulation PRMO producibility, reliability, maintainability, and PRN program release notice PRN pseudorandom noise PRN pulse ranging navigation PRO planning resident order PROFS professional office systems PROM programmable read-only memory PROMIS project-oriented management information system PRP personnel reliability program PRP program redefinition proposal PRPS programming requirements process specification PRR parts replacement request PRR parts rework or replacement PRR preflight readiness review PRR preliminary requirements review PRR production readiness review PRR program requirements review PRR project requirements review PRR pulse repetition rate PRRB Payload Requirements Review Board PRS payload retention system (subsystem) PRS personal rescue system PRS personnel rescue service PRS power reactant subsystem PRS precision ranging system PRS preliminary requirements specification PRS primary recovery site PRS primary rescue site PRS provisioning requirements statement PRSA power reactant storage assembly PRSD power reactant storage and distribution PRSDS power reactant storage and distribution system PRSS problem report squawk sheet PRT pulse repetition time PRTLS powered return to launch site PRV pressure-reducing valve PS parachute system (subsystem) PS probability of success PS production sheet PS payload specialist PS payload station PS payload support PS pointing subsystem PS power supply PS pressure switch PS primary structure PS prime select PSA payload service area PSA producibility, supportability, and affordability PSA payload support avionics PSA postsleep activity PSA power and servoassembly PSA power servoamplifier PSA power switching assembly PSA preferred storage area PSA presleep activity PSA pressure switch assembly PSAC Presidential Scientific Advisory Committee PSBLS permanent space-based logistics system PSC parallel switch control PSC payload support contractor PSC planetary spacecraft PSC Program Support Center PSC program schedule chart PSC program support contractor PSC provide station control PSCL Propellant Systems Cleaning Laboratory PSCN preliminary specification change notice PSCN program support communications network PSCU power supply control unit PSD phase-sensitive demodulator PSD power spectral density PSD Power Systems Division (division of LTV) PSD program support document PSDF Propulsion System Development Facility PSDP payload station distribution panel PSDP payload system distribution panel PSDR planning and scheduling document record PSDU power and signal distribution unit PSE payload service equipment PSE payload support engineer PSE payload support equipment PSE peculiar support equipment PSF point spread function PSF probability of stress failure PSF processing and staging facility (SRB) PSF processing and storage facility (ET) PSF propellant servicing facility PSG Power Subsystem Group PSI power static inverter PSI/SCI preshipment inspection and seller configuration PSIG Propulsion Systems Integration Group PSIU power and signal interface unit PSK phase shift key PSL pressure seal PSL Program Support Library PSL program statement language PSM phase-sensitive modulation PSM power storage module PSM product support manager PSM propellant storage module PSM pyro substitute monitor PSN program schedule network PSO pad safety officer PSOC preliminary SAC operational concept PSOC preliminary system operational concept PSOP peak side on pressure PSP payload signal processor PSP payload specialist panel PSP payload support plan PSP planetary scan platform PSP planetary scan probe PSP positive static pressure PSP program support plan PSP programmable signal processor PSP project schedule plan PSPA pressure static probe assembly PSPL priced spare parts list PSQ personnel security questionnaire PSR payload safety review PSR performance status report PSR problem status report PSR production safety review PSR program status review PSR project safety review PSRD program support requirements document PSRR preliminary systems requirements review PSRS plant service recall system PSS pad safety supervisor PSS propulsion support system PSS payload specialist station PSS payload status system PSS payload support system PSS performance summary system PSS planning and scheduling system PSS portable survival shelter PSS propellant supply subsystem PSS propulsion subsystem PSSP payload specialist station panel PSSR performance status summary report PSSR performance status summary review PSSS packet scan status stack PSST periodic significant scheduled task PSSU patch survey and switching unit PST point source transmission PST point source transmittance PST preliminary systems test PSTL pressure model static and transient launch configuration PSU power switching unit PSV photographic spatial volume PSV planetary space vehicle PSV probability of vehicle success PSW program status word PT Advanced Planning and Technology Office (KSC) PT product team PT productivity team PT propulsion test PT paper tape PT part task PT pitch trim PT pneumatic tube PT point of tangency PT power transfer PT pressure transducer PT primary target PTA pointing and tracking assembly PTA posttest analysis PTA property transfer authorization PTA propulsion test article PTAS performance trend analysis system PTB payload timing buffer PTC passive thermal conditioning PTC passive thermal control PTC portable temperature controller PTCC Propulsion Test Control Center PTCR pad terminal connection room PTCS passive thermal control system PTCS planning, training, and checkout system PTCS pointing, tracking, and control system PTCS propellant tanking computer system PTD preliminary technical directive PTD provisioning technical documentation PTDDSS PTD data selection sheet PTI preliminary test information PTI programmed test input PTIS programmed test input system PTL potential termination liability PTM pulse time modulation PTO power test operation PTR preliminary test report PTR program technical review PTR program trouble report PTS payload test set PTS payload transportation system PTSF payload trunnion support fixture PTT push to talk PTU pan and tilt unit PTV pathfinder test vehicle PU pickup PU power unit PU production unit PU propellant unit PU propellant utilization PUCS propellant utilization control system PUGS propellant utilization and gauging system PUV propellant utilization valve PV photovoltaic PV&D purge, vent, and drain PV/PS pressure vessel and pressure system PVA preburner valve actuator PVA propellant valve actuator PVC polyvinyl chloride PVC pressure-volume compensated PVD passive vibration damping PVD purge, vent, and drain PVDS propellant vent and drain system PVED Propulsion and Vehicle Engineering Division PVLA purchase versus lease analysis PVR precision voltage reference PVRD purge, vent, repressurize, and drain PVT passive visible tracker PVT preflight verification test PVT pressure, volume, and temperature PVT pyrotechnic verification test PVTCS photovoltaic thermal control system PVTOS physical vapor transport organic solids PVWA planned value of work accomplished PVWS planned value of work scheduled PW plan washer PW printed wiring PW pulse width PWA Pratt and Whitney Aircraft PWA printed wiring assembly PWA private write area PWA product work authorization PWB printed wire board PWB printed wiring board PWBS program work breakdown structure PWD proceed with design PWDS protected wire distribution system PWM pulse width modulation PWMD printed wiring master drawing PWS pricing work statement PWT propulsion wind tunnel PWW Project West Wing PY program year PYR pyro release PZT lead, zirconate, titanate Pave Paws ground radar for SLBM detection PbS lead sulfide Pc chamber pressure Pc complexity factor Pd dependency factor PdSi palladium silicide Pm maturity factor Pms probability of mission success PreSOP Preliminary Sizing Optimization Program Ps probability of survival PtSi platinum silicide Q heating rate Q pitch rate Q&A question and answer Q-alpha pitch dynamic pressure Q-beta yaw dynamic pressure QA quality assurance QA quality audit QA&T quality assurance and test QAC quality assurance chart QACAD QA corrective action document QAD Quality Assurance Division (MSFC) QAFM QA Forms Manual QAM QA Manual QAOP QA operating procedure QAP QA procedure QAP quality assurance product QAR quality assurance report QAVT qualification acceptance vibration test QC quality control QCB queue control block QCDR QC deficiency report QCM quartz crystal microbalance QCOP QC operating procedure QCS qualified calibration source QD quick disconnect QDR qualification design review QDS quality data system QE quadrant elevation QE quality engineer QE quality engineering QEC quick engine change QEL queue element QFD quality function deployment QFD quality functional deployment QGS quantity gauging system QI quality information QIC quality information control QL quick look QLDS quick-look data station QLS quick-look station QM qualification motor QMS qualification model spacecraft QPD quality planning document QPL qualified parts list QPL qualified products list QPP quality program plan QPR quarterly progress report QPRD quality planning requirements document QPRD quality program requirements document QPRH Quality Planning Requirements Handbook QPS quantity planning specification QPSD Quality and Productivity Systems Division QPSK quadrature phase shift key QQPRI qualitative, quantitative personnel requirements QRE quick-reaction estimate QRI quick-reaction integration QRIA quick-reaction integration activity QRS qualification review sheet QRS quartz rate sensor QRS quick-reaction sortie QRSL quick-reaction space laboratory QSA qualification site approval QSGVT quarter-scale ground vibration test QSIM queuing simulation QSL qualified source list QSM quarter-scale model QSS quindar scanning system QT qualification test QTP qualification test plan QTP qualification test procedure QTR qualification test report QTV qualification test vehicle QUADS quality achievement data system QUAL Quality Assurance Division (MSFC) QUES queueing model for message dissemination QUI Quito, Ecuador (STDN) QUIC quality data information and control QUIC quality information control QUP quality unit pack QVT qualified verification testing QVVT qualified verification vibration testing R gas constant R radiometer R Rankine R roentgen R yaw Rankine rate R BAR radius vector axis R DOT range rate to target, (+) opening, (-) closing R IMP minimum range to avoid plume impingement R&CC recorder and communication control R&D research and development R&DO Research and Development Operations (MSFC) R&E research and engineering R&M reliability and maintainability R&P reserve and process R&PM research and program management R&QA reliability and quality assurance R&R remove and replace R&R rendezvous and recovery R&S reliability and safety R&T research and technology R&Z range and zero R-T resistance test R/A radar altimeter R/C radio command R/C rate of climb R/C remote control R/D rate of descent R/E reentry R/E right-hand engine R/I receiving inspection R/L rate limited R/L remote/local R/M reliability/maintainability R/O roll-out R/R remove and replace R/S range safety R/S redundant set R/T real time R/T receive/transmit R/T receiver/transmitter R/T reference trajectory R/T room temperature R/W read/write R/W runway R3 rotary reciprocating refrigerator R3S rapid records retrieval system RA radar altimeter RA range area RA right aft RA right ascension RAAB remote amplifier acquisition and advisory box RAAB remote amplifier and adaptation box RAAB remote application and advisory box RAAN right ascension of ascending node RABF radio astronomy bandstop filter RAC Reliability Action Center RACCS remote automatic checkout and calibration system RACF Resource Access Control Facility RACS remote automatic calibration system RACU remote acquisition and control unit RAD radiation absorbed dose RAD research and advanced development RAD roentgen absorbed dosage RADC Rome Air Development Center RADCC Radiation Control Center RADK radiation conduction value RADOP radiator optimization computer code RADVS radar altimeter and Doppler velocity sensor RAE radio astronomy explorer RAE range, azimuth, and elevation RAF requirements analysis form RAG reusable agenda RAHF-VT Research animal holding facility verification RAI radar altimeter indicator RAI review action item RAI roll attitude indicator RAJPO Range Application Joint Program Office RAL responsibility assignment list RALPH reduction and acquisition of lunar pulse heights RALT radar altimeter RAM radar absorption material RAM random access memory RAM Reliability Assessment Model RAM requirements allocation matrix RAM research and applications module RAM resource allocation manager RAM responsibility assignment matrix RAMA recap and movement authorization RAMAC random access method of accounting and control RAMCS remote automatic measuring and calibration system RAMP replenishment activity management plan RAMPS resource analysis and mission planning system RAN Royal Australian Navy RANC radar absorption noise and clutter RANN research applied to national needs RAP reliability assurance program RAP reserve auxiliary payload RAP responsibility accounting program RAPCON radar approach and control RAPP Resource and Planning Program RAR resource accommodation report RAS reacquisition sensor RAS remote access set RAS requirements accounting system RAS requirements allocation sheet RAS reuse all systems RASM remote analog submultiplexer RATCC Radar Air Traffic Control Center RATO rocket-assisted takeoff RAU remote access unit RAU remote acquisition unit RAUIS remote acquisition unit interconnecting station RAWS role-adaptable weapons system RAX remote access computing system RAX remote access terminal RAZEL range, azimuth, and elevation RB radar beacon RB rubber base RBA radar beacon antenna RBA recovery beacon antenna RBC red blood cells RBC rotating beam ceilometer RBDE radar bright display equipment RBE radiation biological effectiveness RBET relative BET RBK right bank RBL right buttock line RBMT retrospective bibliographies on magnetic tape RBN radio beacon RC radio command RC reverse current RC rotation control RC rotational control RC radio control RC range command RC rate command RC reaction control RC recovery controller RC recurring cost RC reinforced concrete RC resistance-capacitance RCA Radio Corporation of America RCA remote control amplifier RCAG remote center air-ground RCB remote circuit breaker RCC Range Commanders' Council (DOD) RCC range control center RCC recovery control center RCC redundancy connection control RCC Regional Control Center RCC reinforced carbon-carbon RCC reusable carbon-carbon RCC rough combustion cutoff RCCA rough combustion cutoff assembly RCCB remote central circuit breaker RCCB Rockwell Configuration Control Board RCCP recorder and communications control panel RCI request for contract investigation RCL reliability control level RCM reliability-centered maintenance RCN requirements change notice RCN Rockwell communication network RCP Radiation Constraints Panel RCP right circular polarizer RCR requirements change request RCR retrofit configuration record RCS reaction control system (subsystem) RCS received command sync RCS reentry control system RCS requirements collection system RCSC reaction control subsystem controller RCU remote control unit RCVS remote control video switch RCY remaining cycles RD radiation detection RD reference designator RD released drawing RD requirements document RD root diameter RDA remote data access RDA resident data area RDC reference designator code RDC request for design change RDC request for document change RDC request for drawing changes RDCS reconfiguration data collection system RDD requirements definition document RDF radio direction finder RDF resource data file RDGS reconfiguration display generation system RDL reconfigurable design language RDM real-time data manager RDO relational data base operator RDOC reference designation overflow code RDOS real-time disk operating system RDP receive and data processor RDP requirements data plan RDP requirements development plan RDR raw data recorder RDS Rocketdyne digital simulator RDT&E research, development, test, and evaluation RDW response data word RDW return data word RE resolution element RE responsible engineer RE&T research engineering and test REA rocket engine assembly REAM rocket engine assembly module RECON remote console RECP request for engineering change proposal RECS representative environmental control system (Shuttle) REDAC Rockwell electronic design analysis code REDB Rockwell engineering data base REFSMMAT reference stable member matrix REI range from entry interface REI runway-end identification REIL runway-end identification lights RELMAT relative matrix RELSAT reliability for satellite (equipment in severe environment) REM release engine module REM release escape mechanism REM release-engagement monitor REM rocket engine module REM roentgen equivalent man RETS reconfigurable electrical test stand REU remote electronics unit REVS requirements engineering and validation system RF new risk factor RF radio frequency RF right forward RF risk factor RF-TK radio frequency tracking RFA request for action RFA RF authorization RFB ready for baseline RFB request for bid RFC radio frequency chart RFC request for change RFCA radiator and flow control assembly RFCA radiator flow control assembly RFCP request for computer program RFD requirements formulation document RFDA radio frequency deployed assembly RFDU radio frequency and digital unit RFE request for estimate RFECP request for engineering change proposal RFEI request for engineering information RFHA reusable flight hardware authorization RFI radio frequency interference RFI remote facility inquiry RFI remote file inquiry RFI request for information RFO request for order RFP request for program RFP request for proposal RFP requirements and formulation phase RFPA request for proposal authorization RFQ request for quotation RFTCP request for test change proposal RFTS radio frequency transmission system RFU radio frequency unit RFW request for waiver (deviation) RG radio guide RG rate gyro RGA rate gyro assembly RGA residual gas analysis RGAL rate gyro assembly, left SRB RGAO rate gyro assembly, orbiter RGAR rate gyro assembly, right SRB RGP rate gyro package RGR repairable generator rate RGRF repair generation rate forecast RH relative humidity RH right-hand RHC remote hand controller RHC rotational hand controller RHCP right-hand circular polarization RHCP right-hand circularly polarized RHCTO rotational hand controller takeover RHEB right-hand equipment bay RHEC radiation-hardened emulating computer RHFEB right-hand forward equipment bay RHL residual hazards list RHP right-hand panel RHS right-hand side RHS Rocketdyne hybrid simulator RHSC right-hand-side console RHT radiant heat temperature RHU radioisotope heater unit RHW response header word RHW router header word RI radioisotope RI record ID RI register immediate RIADB Rockwell integrity assurance data base RIB radioisotope/Brayton RIB recoverable item breakdown RIB right inboard RIC resistance, inductance, and capacitance RICA Rockwell interdivisional contract agreement RICC remote intercomputer communications RICE remote inertial and control equipment RICMOS radiation-hard inverse CMOS RICP real-time interactive computer program RID review item disposition RIDI receiving inspection detailed instruction RIDS Rockwell integrated defense simulator RIE right inboard elevon RIF relative importance factor RIG rate integration gyro RIGA rate-integrating gyro assembly RIGI receiving inspection general instruction RIL recoverable items list RIL repairable items list RIM resource inventory management RIMS RIM system RIMSS Rockwell International modular satellite system RIPS radar impact prediction system RIQ Rockwell International quote RIR reportable items report RIS reporting identification symbol RISC Rockwell Integration Support Contract RISE-C Rockwell International Shuttle equipment cradle RISKAC risk acceptance RISNET risk management analysis system RISOP red integrated strategic operations plan RIT request for interface tooling RIU remote interface unit RJ/EC reaction jet/engine control RJC reaction jet control RJD reaction jet device RJD reaction jet driver RJDA reaction jet driver aft RJDF reaction jet driver forward RJE remote job entry RJOD reaction jet/OMS driver RL reimaging lens RL return link RLA repair-level analysis RLC remote load controller RLE responsible lab engineer RLEO request for liaison engineering order RLG ring laser gyro RLT return line tether RLV Reusable Launch Vehicle RM redundancy management RM right mid RM reference mission RM relay mirror RM remedial maintenance RM remote manipulator RM rendezvous maneuver RM rescue module RM resource management RM resupply module RM&P reliability, maintainability, and producibility RM&QA reliability, maintainability, and quality assurance RM/AS risk management/assessment system RMA reliability, maintainability, and availability RMA remote manipulator arm RMC redundancy management control RME radiation monitoring equipment RMF RCS module forward RMG right main gear RMI radio magnetic indicator RMOP resource management operation plan RMP risk management plan RMRS recoverable maintenance recall system RMRS repeatable maintenance recall system RMS random motion simulator RMS redundancy management system RMS remote maneuvering system RMS remote manipulator system (subsystem) RMS root mean square RMU remote maneuvering unit RN rate of change RN resource node RN Reynold's number RNP rotation, nutation, and precession RNS reusable nuclear stage RNTS regenerative nonventing thermal system RO radar operator RO readout RO receive only RO recovery operations RO rollover ROADS resource and operations analysis display system ROB right outboard ROB rigid optical bench ROC record of comments ROC request of change ROCC Range Operational Control Center ROCC Region Operational Control Center ROCES ranger orbiter crew escape system ROD remotely operated door ROEU remotely operated electrical umbilical ROI return on investment ROL remote operating location ROM read-only memory ROM rough order of magnitude RORSAT radar ocean reconnaissance satellite ROS read-only storage ROS regulated oxygen supply ROS removable overhead structure ROS Rosman, North Carolina (STDN site) ROSES Rockwell Operational Software Engineering System ROSS remote orbital servicing system ROST Rockwell operational system for trades ROST Rockwell operations system for trades ROT remaining operating time ROTI recording optical tracking instrument ROTV returnable orbital transfer vehicle RP relative pressure RP repair period RP rocket propellant RPA record and playback assembly RPA request for procurement action RPA request for procurement authorization RPC remote power control RPC remote power controller RPD Reconfiguration Production Department RPE reliability project engineer RPF rapid prototyping facility RPIE real property installed equipment RPL rated power level RPL Rocket Propulsion Laboratory RPO radiation protection officer RPOC Remote Payload Operations Center RPP reinforced pyrolytic plastic RPP reliability program plan RPS record and playback system (subsystem) RPS RMS planning system RPSF Rotation Processing and Surge Facility RPT resident provisioning team RPT rudder pedal transducer RPTA rudder pedal transducer assembly RPV remotely piloted vehicle RQ respiratory quotient RR range rate RR readiness review RR register to register RR rendezvous radar RR requirements review RR respiration rate RRB Requirements Review Board RRDA rendezvous radar deployment actuator RRDCT risk reduction data collection task RREA rendezvous radar electronics assembly RREU rendezvous radar electronics unit RRL rudder reference line RRP rudder reference plane RRS restraint release system RRS retrorocket system RRT rendezvous radar transducer RRT rendezvous radar transfer RRT rendezvous radar transponder RS Rawinsonde RS redundancy status RS redundant set RS refurbishment spare RS register to storage RS remote station RS right side RS&S receiving, shipping, and storage RSA rapid simulation aid RSA rate sensor assembly RSA rheometrics solids analyzer RSB rudder/speed brake RSC range safety command RSC range safety control RSCIE remote station communication interface equipment RSCR range safety command receiver RSCS rate stabilization and control system RSCSS range safety command shutdown system RSD range support document RSD requirements and specifications document RSDB Rockwell supplier data base RSDP remote site data processor RSEAM Rockwell system engineering analysis model RSF receiving-safing facility RSF Refurbishment and Subassembly Facility (KSC) RSI rate stability indicator RSI reusable surface insulation RSIOP red single integrated operations plan RSIOP Russian strategic integrated operational plan RSL requirement specification language RSL resource support list RSLS redundant set launch sequence RSMM redundant system monitor model RSO Radiological Safety Office RSO range safety officer RSO resident space object RSOC Rockwell Space Operations Company RSPL recommended spare parts list RSR release schedule record RSRA rotor system research aircraft RSRB redesigned solid rocket booster RSRM redesigned solid rocket motor RSS range safety switch RSS range safety system RSS reactant supply system RSS restart selectover system RSS rib structure station RSS root sum square RSS rotating service structure RSSPO Resident Space Shuttle Project Office RST recessed selectomatic terminal RSU remote service unit RSV ready storage vessel RT real time RT reference trajectory RT room temperature RT/LO receiver transmitter/local oscillator RTAC Research and Technology Advisory Committee RTAW Rockwell tandem arc weld RTB resistance temperature bulb RTC real-time clock RTC real-time command RTC real-time computer RTC room-temperature cure RTCA Radio Technical Commission for Aeronautics RTCC Real-Time Computer Center (NASA) RTCC real-time command controller RTCC real-time computer command (uplink) RTCC real-time computer complex RTCE rotation/translation control electronics RTCP real-time communications processor RTCPS real-time computer program system RTCS real-time computer system RTD real-time data RTD real-time display RTD resistance temperature device RTD resistance thermal device RTDD release to design development RTE responsible test engineer RTF return to flight RTFSS real-time flight safety software RTG radioisotope thermoelectric generator RTG range to ground RTHC rotational-translational hand controller RTHS real-time hybrid system RTIF real-time interface RTLS return to launch site RTM release to manufacturing RTM robot task measurement RTO rapid turn-on RTOK retest okay RTOP research and technology objectives and plans RTOP research and technology operating plan RTPM real-time program management RTS range tracking station RTS real-time subsystem RTS real-time supply RTS reliability test specimen RTS remote tracking station RTSF real-time simulation facility RTSS real-time simulation system RTTV real-time television RTU remote terminal unit RTV room-temperature vulcanizing RTVM requirements and test verification matrix RU remote unit RUD RV recirculation valve RV recovery vehicle RV reentry vehicle RV relief valve RVAO reentry vehicle associated object RVAS requirements verification and accounting system RVCF remote vehicle checkout facility RVCN requirement verification completion notice RVDISC RV discrimination RVDT rotary variable differential transducer RVDT rotary variable differential transformer RVN requirements verification network RVR requirement verification revision RVR runway visual range RVRS requirements verification review sheet RVTAPS RV track and prediction simulation RW reaction wheel RW read and write RW response word RW runway RWD right wing down RWE read/write electronics RWM read and write memory RYD real-year dollars RZ return to zero Rf risk factor Rnet reconfiguration network S stere S&A safe and arm S&A science and application S&AD Science and Applications Directorate S&C stabilization and control S&E Science and Engineering (MSFC directorate) S&E sensors and effectors S&H sample and hold S&MST space and missile system test S&PA safety and product assurance S&SED Satellite and Space Electronics Division (Rockwell) S* second (astronomical tables) S- Saturn stage (followed by Roman numeral) S-ASKR semiactive seeker S-E survivability-endurance S-N stress number S-O shutoff S/A safe and arm S/A scheduled/actual S/A site activation S/A solar array S/A spacecraft adapter S/A subaccount S/A subassembly S/A supplemental agreement S/A swing arm S/AC stabilization/attitude control S/B serial block S/B standby S/C security code S/C sensor/controller S/C signal conditioner S/C software contractor S/C spacecraft S/C splitter/combiner S/C stabilization and control S/C strip chart (recorder) S/C subcontractor S/CO spacecraft observer S/DG strap-down gyro S/E service equipment S/EOS standard Earth observation satellite S/F safety factor S/F single flow S/F static firing S/G salary grade S/G strain gauge S/I system integration S/L shop laboratory S/L space laboratory S/M scheduled maintenance S/M service module S/M service/maintenance S/M systems management S/N serial number S/N service note S/N signal-to-noise ratio S/O shutoff S/O switchover S/P serial to parallel S/P signal processor S/R send and receive S/R shift register S/R stimulus/response S/S signal strength S/S single side band S/S subsystem S/U setup S/V space vehicle S/V supply valve S/V survivability/vulnerability S/VAR survivability/vulnerability analysis report S/W software S3 sortie support system S3/E SBKEW system simulator/emulator S3E SABIR system simulator/emulator SA safing area SA structural analyzer (computer program) SA subaccount SA supplemental agreement SA support area SA swing arm SA selective availability SA shaft angle SA shop aid SA signature analysis SA single access SA site activation SA solar array SA spectrum analyzer SA&I Systems Analysis and Integration (MSFC) SAA science and applications mission SAA south Atlantic anomaly SAAC schedule allocation and control SAALC San Antonio Air Logistics Center SAAS Shuttle aerospace actuator simulator SAAX science and applications mission SAB Satellite Assembly Building SAB Shuttle Assembly Building SAB source approval bulletin SAB Spacecraft Assembly Building SAB Storage and Assembly Building SABIR space-based interceptor SABS shared-aperture boresight sensor SAC sequencing and application controller SAC Space Applications Corporation SAC Strategic Air Command SAC Support Action Center SACCS SAC automated command control system SACEUR Supreme Allied Commander, Europe SACS software avionics command support SACTO Sacramento Test Operations SAD Shuttle authorized document SAD spacecraft attitude display SAD special adapter device SAD system allocation document SADEC spin axis declination SADPT solar array drive and power transfer SADT structured analysis and design technique SADT systems analysis and design technique SAE shaft angle encoded SAE Society of Automotive Engineers SAEF Spacecraft Assembly and Encapsulation Facility (KSC) SAF Secretary of the Air Force SAF secured access facility SAF spacecraft assembly facility SAF special-access facility SAFE safing and failure detection expert SAFE San Andreas Fault experiment SAFSP Secretary of the Air Force Special Projects SAGE semiautomatic ground environment SAGE stratospheric aerosol gas experiment SAIC Science Applications International Corporation SAIC Scientific Applications Instrumentation Corporation SAID Shuttle authorized item document SAIL Shuttle Avionics Integration Laboratory SAINT satellite interceptor program SAIP spares acquisition integrated with production SAJ subassembly jig SAL San Salvador Island SAL scientific airlock SAL Shuttle Avionics Laboratory SAL strategic arms limitation SAL Supersonic Aerophysics Laboratory SALC Sacramento Air Logistics Center SALT standard analysis language translator SALT Strategic Arms Limitation Talks SAM School of Aerospace Medicine (Air Force) SAM Shuttle attachment manipulator SAM special air mission SAM supportability assessment model SAM surface-to-air missile SAM system activation and monitoring SAMP Shuttle automated mass properties SAMS Shuttle altitude measuring system SAMS Shuttle attached manipulator system SAMS Space Acceleration Measurement System SAMTEC Space and Missile Test Center (VAFB, California) SAMTECM Space and Missile Test Center Manual SAMTO Space and Missile Test Organization SAND site activation need data SANDAC Sandia airborne computer guidance system SANGUINE Navy ELF network SANS stellar autonomous navigation system SAP strain arrester plate SAPMD stand-alone pressure measurement device SAR safety analysis report SAR support action request SAR synthetic-aperture radar SAR system assessment review SAR search and rescue SAR site action request SAR special access required SAR special action request SAR special action requirement SAR storage address register SAR subsequent applications review SAR summary analysis report SARAH search and range homing SARP safety analysis report for packaging SARP Shuttle astronaut recruitment program SARP small autonomous research package SART stimuli analog refresh table SAS software approval sheet SAS software automation subpanel SAS solar array simulator SAS solar array system SAS stability augmentation subsystem SAS surveillance architecture study SASCB Shuttle Avionics Software Control Board SASE standards analysis, synthesis, and expression SASR Shuttle avionics status review SASR Shuttle avionics system review SASS spectral agile sensor system SASTP stand-alone self-test program SAT static air temperature SAT surveillance, acquisition, and tracking SAT systems approach to training SATAF Shuttle Activation Task Force SATAF Site Activation Task Force SATCOM satellite communications SATCON satellite connectivity simulation SATE semiautomatic test equipment SATKA surveillance, acquisition, tracking, and kill assessment SATO Shuttle attached teleoperator SATO supply and transportation operations SATPLAN satellite assessment tool SATS Shuttle avionics test set SATS Shuttle avionics test station SATS small applications technology satellite SATS station accommodation test site SATS supplier assessment tracking system SATS supply and transportation support SATSIM satellite target sensing simulation SAU strap-around unit SAU&SE SDI systems architecture utility and survivability SAV-D Space Shuttle display development compiler SAW satellite attack warning SAW/V satellite attack warning/verification SAWBOC system analysis with blockout considerations SB small business SB space base SB speed brake SB synchronization base SB synchronization bit SB/M switchable bandpass/mirror SB/SDB small business/small disadvantaged business SBA seat-back assembly SBA Small Business Administration SBA structure-borne acoustic SBA switchable beam antenna SBAS S-band antenna switch SBCR stock balance and consumption report SBD schematic block diagram SBDEW space-based, directed-energy weapon SBDEWSIM space-based, directed-energy weapon simulation SBE sub-bit encoder SBFS Space Businesses Financial Services SBHC speed brake hand controller SBI space-based interceptor SBKEW space-based kinetic-energy weapon SBKEWS space-based kinetic-energy weapon system SBKKV space-based kinetic kill vehicle SBKKVWS space-based kinetic kill vehicle weapon system SBL space-based laser SBLIP Space-Based Laser Intercept Program SBM strategic ballistic missile SBMS space-based battle manager satellite SBMS spaceborne battle management satellite SBNPB space-based neutral particle beam SBNWS Seal Beach Naval Weapons Station SBOTV space-based OTV SBP San Luis Obispo (TACAN station) SBP sonic boom panel SBP Strategic Business Plan SBPA S-band power amplifier SBR space-based radar SBS satellite business system SBS scientific business satellite SBSS space-based space surveillance SBSS space-based surveillance system SBTC speed brake/thrust controller SBTO speed brake takeover SBUE switch backup entry SBX S-band transponder SC Science Center SC superimposed current SC support contractor SC surface command SC system characterization SC system concept SC separation and control SC service charge SC signal conditioner SC single contact SC software change SC spacecraft SC statement of capability SC statement of compatibility SC/SM spacecraft systems monitor SC/TC spacecraft test conductor SCA schedule change authorization SCA system controller assembly SCA SDI communications architecture SCA sequence control area SCA sequence control assembly SCA Service Contract Act SCA Shuttle carrier aircraft SCA simulation control area SCA sneak circuit analysis SCA software command analysis SCAMA station conferencing and monitoring agreement SCAN selected current aerospace notice SCAN Shuttle connector analysis network SCAP Shuttle configuration analysis program SCAPE self-contained atmosphere protective ensemble SCAR safety change assessment report SCARS serialized control and record system SCARS sneak-circuit analysis report summary SCAT space communication and tracking SCAT storage, checkout, and transport SCAT system commonality analysis tool SCATS simulation control and training system SCATS simulation, checkout, and tracking system SCB Schedule Control Board SCB Selection Control Board SCB selector control box SCB Software Control Board SCB Specification Control Board SCB steering control box SCBD seller's configuration baseline document SCC Safety Control Center SCC Scientific Computing Center SCC secondary control code SCC Simulation Control Center SCC simulation configuration control SCC Standing Consultative Commission SCC System Control Center SCCB Site Configuration Control Board SCCB Software Change Control Board SCCB Software Configuration Control Board SCCC Spacecraft Command and Control Center SCCE signal conditioning control electronics SCD SCM comparison display SCD source control drawing SCD specification change drawing SCD specification control document SCD specification control drawing SCD system concept definition SCDP simulation control data package SCDR seller critical design review SCDR Shuttle critical design review SCDR software critical design review SCDR subcontractor critical design review SCDS secure central data subsystem SCDU signal conditioning and display unit SCE signal conditioning equipment SCE sortie cargo element SCE Space Transportation System cargo element SCEA signal conditioning electronics assembly SCF Satellite Control Facility SCF sequence compatibility firing SCF spacecraft control facility SCF Sunnyvale Control Facility SCG Security Classification Guide SCGSS supercritical gas storage system SCI seller configuration inspection SCI sensitive compartmented information SCI software customer inspection SCI switch closure in SCIF sensitive compartmented information facility SCIM Shuttle cargo integration manager SCIP self-contained instrument package SCIP Shuttle cargo integration plan SCIT standard change integration and tracking SCIT system concept and integrated technology SCIU selector control interface unit SCIU sortie control interface unit SCL safety checklist SCL secondary coolant line SCL secondary coolant loop SCL specification change log SCLM stability, control, and load maneuver SCM schedule/configuration management SCM software configuration management SCM software configuration manager SCM system (subsystem) configuration management SCM system configuration monitoring SCM system control module SCMO Software Configuration Management Office SCMP software configuration management plan SCMP system contractor management plan SCMU satellite control and monitor unit SCN schedule change notice SCN specification change notice SCNP specification change notice proposal SCO spacecraft operator SCO start checkout SCO subcarrier oscillator SCO supercritical oxygen SCO switch closure out SCOE special checkout equipment SCOMP secure communications protocol SCOR SMS Comsec Operation Room SCOS subsystem computer operating system SCP scanner control power SCP site configuration package SCP specific candlepower SCR SAIL change request SCR schedule change request SCR signal conditioner SCR silicon controller rectifier SCR sneak-circuit report SCR software change request SCR space-constructible radiator SCR strip chart recorder SCRAM station crew return alternative module SCRB Software Configuration Review Board SCRB STSOC Configuration Review Board SCRG System Change Review Group (MSFC) SCRL station configuration requirement list SCRP Secure Communications Requirements Panel SCRPC Southern California Regional Purchasing Council SCRS strip chart recording system SCS secondary coolant system SCS serialization card system SCS service and checkout system SCS signature control system SCS spacecraft control system SCS stabilization and control system (subsystem) SCS system control station SCSAP SCS adjust panel SCSCP SCS control panel SCSG single-channel signal generator SCSMSP SCS mode select panel SCSS satellite control simulation system SCT signal channel transponder SCTE S-band communication and tracking equipment SCTE spacecraft central timing equipment SCU secondary control unit SCU sequence control unit SCU sequential control unit SCU service and cooling umbilical SCU Shuttle configuration unit SCU signal conditioner unit SCU signal control unit SCVE spacecraft vicinity equipment SCW search-complete word SD signal digitizer SD solar dynamic SD Space Division SD spares disposition SD specification document SD&EOSD Strategic Defense and Electro-Optics Systems SD&FS smoke detection and fire suppression SD&I system development and integration SD/AFSC Space Division/Air Force Systems Command SD/IN Space Division/Intelligence SD/SP Space Division Directorate of Security SD/YO Space Division director, Operations Support and Integration, deputy commander for Space SDA shaft drive axis SDA source data automation SDAF SRB Retrieval and Disassembly Facility SDAG Strategic Defense Advisory Group SDAP Shuttle descent analysis program SDAT spacecraft data analysis team SDB shallow-draft barge SDB shallow-draft board SDB small disadvantaged business SDBC software development baseline control SDC signal data converter SDC software development computer SDC Space Data Corporation SDC spares disposition code SDC Strategic Defense Center SDC Strategic Defense Command (U.S. Army) SDC System Development Corporation SDC-CC Space Defense Command Communication Center SDC-OC Space Defense Command Operations Center SDCC Strategic Defense Command Center SDCP summary development cost plan SDCS SAIL data communications system SDD Shuttle design directive SDD software description document SDD software design document SDD system for distributed data base SDD systems development device SDDD software detailed design document SDDL software design and document language SDE software development environment SDE Space Division evaluator SDEF Service Development Evaluation Facility SDF safing and deservicing facility SDF Shuttle Development Facility SDF simulation data file SDF single degree of freedom SDF software development facility SDF software development file SDF system development facility (breadboard) SDG strap-down gyro SDH Software Development Handbook SDH System Definition Handbook SDHS satellite data handling system SDI selective dissemination of information SDI Strategic Defense Initiative SDIF software development and integration facility SDIL spacecraft DCD interface logic SDIO Strategic Defense Initiative Office SDIP Strategic Defense Initiative Program SDL SAIL difference list SDL scenario description language SDL Software Development Laboratory SDL Software Development Library SDL standard distribution list SDL system design language SDLV Shuttle-derived launch vehicle SDM Shuttle data management SDM Shuttle Definition Manual SDM Subsystem Design Manual SDM System Definition Manual SDMB Shuttle Discrepancy Management Board SDMS Shuttle data management system SDN safety discrepancy notice SDN software development note SDNS secure data network system SDOF single degree of freedom SDOPS strategic defense operational planning support SDP sensor data processing SDP Shuttle data processor SDP site data processor SDP software development plan SDP standard data processor SDP strategic defense program SDP subsystem development plan SDPC Shuttle Data Processing Complex SDPLV Shuttle-derived-propellant launch vehicle SDQA Space Division Quality Assurance SDR sensor data record SDR serial data receiver SDR series dissipating regulator SDR software design requirement SDR software design review SDR Spacelab disposition record (ESA) SDR storage data register SDR system design review SDR systems definitions review SDRB Software Design Review Board SDRL subcontract data requirements list SDRL subcontractor data requirements list SDRS Shuttle display reconfiguration system SDS satellite data system SDS strategic defense system SDS scientific data system SDS Shuttle dynamic simulation SDS Shuttle dynamic simulator SDS simulation data subsystem SDS smoke detector system SDS software design specification SDS Space Defense System SDS steering and damping subsystem SDSS Space Division Shuttle simulator SDT Shuttle data tape SDT structural dynamic test SDTA structural dynamic test article SDTS satellite data transmission system SDV Shuttle-derived vehicle SDVF software development and verification facility SE support equipment SE system effectiveness SE system element SE system evaluator SE systems engineering SE&A system engineering and analysis SE&I systems engineering and integration SE&TD system engineering and technical direction SE/FAC support equipment facility SEA scanning electrostatic analysis SEA silicon elastometer ablator SEACF support equipment assembly and checkout facility SEADS Shuttle entry air data sensor SEAGA selective employment of airborne and ground alert SEAID support equipment abbreviated items description SEAM system engineering and analysis management SEAPG Support Equipment Acquisition Planning Group SEASIM system element attrition simulation SEB scientific equipment bay SEB Source Evaluation Board SEB support equipment building SEB systems engineering branch SEC sequential events controller SEC Source Evaluation Committee SEC split expander cycle SECO sustainer engine cutoff SECOR sequential collation or range SECP SE computer program SECS sequential events control system SECS Shuttle events control subsystem SECS simulation/experiment control system SED space engineering document SEDB SE data base SEDR SE design review SEDR Systems Engineering Department report SEE software engineering exercise SEE software equality evaluation SEER sensor experimental evaluation and review SEF Space Environmental Facility (NASA) SEG Simulation Engineering Group SEG system engineering ground rule SEI SE item SEI seller end item SEI Software Engineering Institute SEI support equipment installation SEICO support equipment installation and checkout SEID SE item description SEIS Shuttle experiments integration support SEIS Spacelab experiments integration support SEIS standard end item specification SEIST system engineering, integration, and support team SEIT system engineering, integration, and test SEL Systems Electronics Laboratory SEL Systems Engineering Laboratories SEM scanning electron microscope SEM seller's engineering memo SEM Shuttle experiment module SEM space environment monitoring SEM subcontractor engineering memorandum SEM system engineering management SEMP system engineering management plan SEMS space environment monitor system SEMWS survivable, endurable missile warning system SEND shared equipment need date SEO special engineering order SEOS synchronous Earth observation satellite SEP Shuttle electronics package SEP solar electric propulsion SEP space electronics package SEP standard electronic package SEP support equipment package SEP systems engineering plan SEPA site engineering project authorization SEPAP Shuttle electrical power analysis program SEPAR Shuttle electrical power analysis report SEPP system effectiveness program plan SEPS solar electric propulsion system SER service employment redevelopment SER system engineering review SERB Shuttle Engineering Review Board SERB Support Equipment Review Board SERB Systems Engineering Review Board SERD SE requirements document SERF SE requirements file SERF Space Environment Research Facility SERIES-X satellite emission range infrared Earth sent SERR SE requirements review SERS Shuttle enhanced reconfiguration system SERS Shuttle equipment record system SERT space electrical rocket test SES Shuttle engineering simulation SES Shuttle engineering simulator SES software evaluation subpanel SES special-emphasis study SES spinning-Earth sensor SES systems engineering simulator SESA special-equipment stowage assembly SESC Shuttle events sequential control SESL Space Environment Simulation Laboratory SESL Space Environmental Simulation Laboratory SESP space experiment to support program SET solar energy thermionic SETA system engineering and technical assistance SETAC system engineering and technical assistance contractor SETAC Systems Engineering Technical Advancement Center SETF small-engine test facility SETP system engineering test phase SEU single-event upset SEUL support equipment utilization list SEV status, error, and validity SEVP status, error, validity, and parity SEVS simulation and evaluation system SEWB system engineering work bench SEWG Sustaining Engineering Working Group SEWG System Effectiveness Working Group SEWS satellite early warning system SF safety factor SF Safety, R&QA, and Protective Services (KSC directorate) SF scale factor SF selection filter SF signaling frequency SF spot face SF star field SF static firing SF subcontractor-furnished SF-SOO KSC Safety Operations Office SFA sun-finder assembly SFACI software flight article configuration inspection SFC selection filter control SFC specific fuel consumption SFCS survival flight control system SFDS system functional design specification SFDT site format dump tape SFF static firing facility SFL secondary Freon loop SFM senior functional manager SFO space flight operations SFOF Space Flight Operations Facility (JPL) SFOM Shuttle Flight Operations Manual SFOM space flight operations memorandum SFOP safety operating procedure (KSC) SFOP space flight operations plan SFP single failure point SFP summary flight plan SFP sustainer fuel pressure SFPA single failure point analysis SFPPL short-form provisioning parts list SFPS single failure point summary SFS Shuttle flight status SFSS satellite field service station SFT simulated flight test SFT static firing test SFT structural fatigue test SFTA structural fatigue test article SFTF static firing test facility SFU standard firing unit SG scenario generation SG signal generator SG surgeon general SGC stabilized ground cloud SGEMP space-generated electromagnetic pulse SGEMP system-generated electromagnetic pulse SGITS spacecraft/GOSS interface test system SGLS space-ground link station SGLS space-ground link system SGML standard generalized markup language SGMT simulated Greenwich mean time SGOS Shuttle ground operations simulator SGP single ground point SGP static ground point SGP structure ground point SGS symbol generator and storage SGSC strain gauge signal conditioner SH2 supercritical hydrogen SHA sidereal hour angle SHA system hazard analysis SHAD stellar horizon atmospheric dispersion SHAD stellar horizon attitude determination SHAG simplified high-accuracy guidance (Honeywell) SHAR stellar horizon atmospheric refraction SHARE Space Station heat pipe advanced radiator element SHERB Sandia human error rate bank SHF superhigh frequency SHIMS system hazard information management system SHLB simulation hardware load box SHM Stage Handling Manual SHOOT super helium on-orbit transfer SHORAN short-range navigation SHP shaft horsepower SHP sustainer hydraulic pressure SHRD supplemental heat rejection device SHS simulation hardware system SHe supercritical helium SI international system of units SI scientific instrument SI Shuttle integration SI solar inertial SI storage immediate SI system integration SI/FS system integration and flight software SIA software impact assessment SIA solar inertial attitude SIA structural interface adapter SIA system integration area SIAP System Integrity Assurance Program SIAPP System Integrity Assurance Program Plan SIB simulation interface buffer SIB Systems Integration Board SIC standard industrial classification SICA structural interface compatibility assessment SICBM small intercontinental ballistic missile SID Shuttle integration device SID simulator interface device SID standard interface document SID standard items data base SID system interface document SIDL system identification list SIE SAT integrated experiment SIE SATKA integrated experiment SIE Shuttle interface equipment SIE Society of Industrial Engineers SIE system integration engineer SIEB Security Impact Evaluation Board SIES supervision, inspection, engineering, and services SIF systems integration facility SIGINT signals intelligence SIGP scientific instrument gas purge SIGT1 Signal Tape 1 SIL sound interference level SIL speech interference level SIL System Integration Laboratory SILTS Shuttle infrared lee-side temperature sensing SIM scientific instrumentation module SIMAS Shuttle information management accountability system SIMCAT simulate observations using space catalog SIMCHE simulation and checkout equipment SIMFAC simulation facility SIMO single instruction, multiple data paths SIMR systems integration management review SIMS secondary ion mass spectroscopy SIMS Shuttle imaging microwave system SIMS Shuttle inventory management system SIMS single inventory management system SIN support information network SINDA system improved numerical differences analyzer SINDA systems improved numerical differences analyzer SINDA systems improved numerical differencing analysis SINE spacecraft-induced and natural environment SIO serial input/output SIO staged in orbit SIO Systems Integration Office SIOP single integrated operational plan SIOP single integrated operations plan SIOP strategic integrated operations plan SIP scientific instrument package SIP separation instrumentation package SIP standard interface panel SIP standard interface plan SIP strain isolation pad SIP strategic information plan SIP system interface processing SIPS small instrument pointing system SIR Shuttle imaging radar SIR systems integration review SIRE Space Infrared Experiment SIRR software integration readiness review SIRTF Shuttle Infrared Telescope Facility SIS SAIL interface system SIS simulator interface system SIS software implementation specification SIS software integrated schedule SIS Spade integrated simulator SIS standard interface specification SIS steam inerting system SIS Strom inerting system SIS systems integration schedule SIS scanning imaging spectrometer SIS serial input special SIS shock isolation system SIS Shuttle information service SIS Shuttle information system SIS Shuttle integration schedule SIS Shuttle interface simulator SIS simulation interface subsystem SISD simulation interface and standards document SISEX Shuttle Imaging Spectrometer Experiment SIT Shuttle integrated test SIT Shuttle interface test SIT silicon-intensified target SIT software integrated test SIT Stevens Institute of Technology SIT structural integrity test SIT systems integration test SITE spacecraft instrumentation test equipment SITP system integration test plan SITT systems integration of triad technology SIU serial interface unit SIU signal interface unit SIU standard interface unit SIVE Spacelab interface verification equipment SJ slip joint SJC spacecraft jettison controller SL sea level SL shelf life SL sick leave SL sound level SL space laboratory SL space launch SL Spacelab SL star line SL&I system load and initialization SL-SS Spacelab subsystem SL-SSS Spacelab subsystem segment SLA ERNO Spacelab product assurance department SLA service-module-to-launch-module adapter SLA spray-on lightweight ablator SLA superlight ablative SLA support and logistics areas SLAC Stanford Linear Accelerator Center SLAENG space-based laser engagement SLAHTS stowage list and hardware tracking system SLAM side-load arrest mechanism SLAM simulation language for alternative modeling SLAM station logistics and maintainability (data base) SLAMAP space laser mission analysis program SLAR side-looking airborne radar SLAT supersonic low-altitude target SLATM supersonic low-altitude target missile SLBD sea light-beam director SLBM submarine-launched ballistic missile SLC ERNO Spacelab project control SLC space launch complex SLC6 Space Launch Complex 6 SLCA ERNO Spacelab contract administration SLCL shop/lab configuration layout SLCM ERNO Spacelab configuration management SLCM sea-launched cruise missile SLCS software library control system SLCSAT submarine laser communications satellite SLD stiff-leg derrick SLE ERNO Spacelab engineering SLED space laser experiment definition SLEMU Spacelab engineering model unit SLF Shuttle Landing Facility (KSC) SLFC selectable low-frequency clock SLFCS survivable low-frequency communications system SLI ERNO Spacelab integration and test SLIM scanned long-wave infrared module SLKT survivability, lethality, and key technologies SLL shelf-life limit SLM sound-level meter SLM space laboratory module SLO ERNO Spacelab operations SLO Spacelab only SLOC source lines of code SLODB Spacelab Operational Data Book SLOS star line of sight SLP ERNO Spacelab payload SLPB Spacelab Program Board SLPCRB SIP low-profile cable routing bracket SLPEM Sparta Linear Programming Effectiveness Model SLPO ERNO Spacelab Program Office SLR scanning laser radar SLS secondary landing site SLS sortie lab simulator SLS Spacelab simulator SLS statement-level simulator SLSA Shuttle logistics support aircraft SLSG suit loop stimuli generator SLSMS Spacelab support module simulator SLT ERNO Spacelab technology SLUK Spacelab utility kit SLV space launch vehicle SLVX new launch vehicle derivative of Titan 34D SLW straight-line wavelength SM service module SM system monitoring SM systems management SM short module SM Shuttle Management (KSC) SM stabilized member SM stable member SM strategic missile SM subcontract management SM successful mission SM support module SM&S systems management and sequencing SM/PM systems management/performance monitor SM3/H standard m3 per hour SMA simulation model adapter SMA Systems Management American Corporation SMAB Solid Motor Assembly Building SMAG star magnitude SMARTS simulation, monitoring, analysis, reduction, and test SMATH satellite materials and target hardening SMB space meteorology branch SMC Scientific Manpower Commission SMCC Shuttle Mission Control Center SMCH standard mixed-cargo harness SMCM small module core memory SMCS separation monitoring control unit SMD shop manufacturing development SMD Spacelab mission development SMD special measuring device SMD Structures and Mechanics Division SMD system measuring device SMDC shielded mild detonating cord SMDM small multiplexer/demultiplexer SMEAR SPAN/mission evaluation action request SMED single minute exchange of dies SMEK summary message enable keyboard SMES Shuttle mission engineering simulator SMES Shuttle mission evaluation simulation SMES superconducting magnetic energy storage SMG Space Flight Meteorology Group SMI SM initialization SMI sortie mission integrator SMIA single multiplexer interface assembly SMIC sortie mission integration contractor SMIRR Shuttle multispectral infrared radiometer SMIS STDN management information system SML structure mold line SMM Solar Maximum Mission SMM Subcontract Management Manual SMM Subsystem Management Manual SMM subsystem measurement management SMMD specimen mass measurement device SMMR scanning multichannel microwave radiometer SMOC simulation mission operation computer SMP software management plan SMPM Structural Materials Property Manual SMPS service module propulsion stage SMPTRB Shuttle Main Propulsion Test Requirement Board SMQ SM quad SMQ structure module qualification SMR source, maintenance, and recoverability SMRD spin motor rotation detector SMRD spin motor run detector SMRD spin motor run direction SMRD spin motor run discrete SMRD spin motor running detector SMRD spin motor running director SMS separation mechanism subsystem SMS system mechanical schematic SMS sequenced milestone system SMS Shuttle mission simulator SMS site-managed software SMS software modification sheet SMS Solar Maximum satellite SMS space motion sickness SMS stationary manipulator system SMS synchronous meteorological satellite SMSA standard metropolitan statistical area SMSA strategic missile support area SMSB strategic missile support base SMSC software moding, sequencing, and control SMSCC Shuttle mission simulator computer complex SMSFB SMS fixed base SMSG Shuttle Maintenance Steering Group SMSS survivable missile surveillance system SMT selective message transaction SMT small missile telecamera SMT surface-mounted technology SMTAS Shuttle modal test and analysis system SMTF Shuttle Mission Trainer Facility SMU soft mockup SMU software management utility SMU source management utility SMU speaker/microphone unit SMVP Shuttle Master Verification Plan SMVRD Shuttle master verification requirements document SMW standard materials work sheet SMW strategic missile wing SN serial number SN service note SN space network SNA system network architecture SNAP Shipboard Nontactical ADP Program II SNAP space nuclear auxiliary power SNAP-10 space nuclear auxiliary power system SND signal network distributor SNF system noise figure SNPO Space Nuclear Propulsion Office (NASA) SNR signal-to-noise ratio SNS Shuttle network system SNSO Space Nuclear Systems Office SO shop order SO Shuttle operations SO slow operating (relay) SO Support Operations (KSC directorate) SO/SI space operations and scientific investigation SO2 solid oxygen SO2 supercritical oxygen SOA state of the art SOAR Shuttle orbital applications and requirements SOARS Shuttle operation automated reporting system SOATS support operation automated training system SOC Shuttle Operations Center SOC simulation operation computer SOC Space Operations Center SOC system operational concept SOC system option controller SOCAR Shuttle Operational Capability Assessment Report SOCC Satellite Operations Control Center SOCC Shuttle Operations Computing Center SOCCB Secure Operations Configuration Control Board SOCH Spacelab orbiter common hardware SOCKO systems operational checkout SOCS subsystem operation and checkout system SODB Shuttle Operational Data Book SODB start of data block SODIM Standard Operational Data Item Manual SODS Shuttle operational data submittal SODS Shuttle operational data system SODS Skylab orbit-deorbit system SODSIM strategic offense-defense simulation SOF safety of flight SOFAR sound fixing and ranging SOFAS survivable optical forward acquisition system SOFI spray-on foam insulation SOFT space operations and flight technique SOFT suborbit flight test SOGS science operations ground system SOH start of heading SOH state of health SOI space object identification SOIS Spacelab/orbiter interface simulator SOM ship operations manager (NASA) SOM spares optimization model SOM Stage Operating Manual SOM Standard Operating Manual SOM suborbital mission SOMF start of minor frame SOMM Software Operations and Maintenance Manual SOMS Shuttle orbiter medical system SON statement of need SOP secondary oxygen pack SOP secure operations preboard SOP spacecraft operations plan SOP Spacelab opportunity payload SOP standard operating procedure SOP structural optimization procedure SOP subsystem operating program SOP subsystems operating procedure SOP systems operating plan SOPC Shuttle Operations and Planning Center SOQ system optical quality SOR specific operational requirement SOR specification operational requirement SOR stable orbit rendezvous SOS serial output special SOS silicon on sapphire SOS source of supply SOS space ordnance system SOS stabilized optical sight SOS synchronous-orbit satellite SOS system operational safety SOSI space operations scientific investigation SOSMAN Space Operations System Manifesting Program SOSRM strap-on solid rocket motor SOT solar optical telescope SOT strap-on tank SOTS suborbital tank separation SOV shutoff valve SOV solenoid-operated valve SOW start of word SOW statement of work SOW subdivision of work SP safety plan SP standard or peculiar SP static pressure SP surveillance payload SP shoulder pitch SP Shuttle Project Office (KSC) SP signal processor SP single pole SP solar physics SP solid propellant SP sortie payload SP stable platform SP-ACT Site Activation Office (KSC Shuttle) SP-AF Air Force STS Liaison Office (KSC Shuttle) SP-FGS Flight and Ground Systems Office (KSC Shuttle) SP-ILS Integrated Logistics Support Office (KSC Shuttle) SP-OPI Operations Planning and Integration Office (KSC Shuttle) SP-OSO Off-Site Offices (KSC Shuttle) SP-PCO Program Control Office SP-SMO Site Management Office (KSC Shuttle) SPA S-band power amplifier SPA servopower amplifier SPA servopower assembly SPA shared peripheral area SPA signal processor assembly SPA small-payload accommodations SPA software product assurance SPA space processing application SPA steering position amplifier SPACE spacecraft prelaunch automatic checkout equipment SPAD Shuttle payload accommodation document SPADATS space defense acquisition and tracking system SPADCCS space defense command and control system SPADE Space Acquisition Defense Experiment SPADOC Space Defense Operations Center SPADS Shuttle problem analysis data system SPAF simulation processor and formatter SPAH Spacelab Payload Accommodations Handbook SPAN spacecraft analysis SPAR Shuttle pointed autonomous research SPAR supportability problem assessment report SPARS space precision attitude reference system SPART space research and technology SPAS Indonesian communication satellite SPAS Shuttle pallet applications system SPAS Shuttle pallet satellite SPAT Satellite Performance Analysis Team SPAT small-payload accommodation terminal SPC shipping and packing cost SPC Shuttle Processing Contract (contractor) SPC Software Productivity Consortium SPC starting-point code SPC statistical process control SPC stored program command SPC stored program control SPC synoptic properties code SPCA secondary power control assembly SPCC STS Processing Control Center SPCR software problem change request SPCS service and performance checkout system SPCU simulation process control unit SPD standard practice directive SPD system preliminary design SPDB subsystem power distribution box SPDM special-purpose dexterous manipulator SPDR scheduled planning drawing release SPDR software preliminary design review SPDS stabilized payload deployment system SPDT single pole, double throw SPE software process engineering SPE static phase error SPEARS supplier performance evaluation and rating system SPEC specialist function SPEE special-purpose end effector SPF Software Production Facility (JSC) SPF Spacelab Processing Facility SPFA single-point failure analysis SPFL single-point failure list SPFM single-point failure mode SPFP single-point failure potential SPG single-point ground SPGAI surface position gimbal angle indicator SPI surface position indicator SPICE Shuttle payload integration cargo evaluation SPICE Spacelab payload integration and coordination in Europe SPICE Survey Probe Infrared Celestial Experiment SPICE survey program of infrared celestial experiments SPIDF support-planning identification file SPIDPO Shuttle Payload Integration and Development Program Office (JSC) SPIDPO Shuttle Payload Integration and Development Program Office (JSC) SPIDS stabilized payload interface deployment system SPIF Shuttle Payload Integration Facility SPIF Shuttle Processing Interface Facility SPIF standard payload interface SPII Shuttle program implementation instruction SPIMS Shuttle program information management system SPIRE sensor performance in a radiation environment SPIRE Spectral Infrared Rocket Experiment SPIRIT spatial infrared telescope SPL scratch pad line SPL secondary payload SPL serialized parts list SPL sonic pressure level SPL sound pressure level SPL system programming language SPM seeker and processor math models SPM Software Programmer's Manual SPM software performance monitor SPM Standard Parts Manual SPM subsystem project manager SPMS special-purpose manipulator system SPN Shuttle project notice (KSC) SPO Shuttle Program Office SPO Spacecraft Program Office SPO spare parts order SPO Special Projects Office SPO System Program Office SPO System Project Office SPOC Shuttle Payload Operations Contract SPOC Shuttle portable on-board computer SPOM STS planning and operations management SPORTS simplified payload/orbiter thermal simulator SPOT Space Station proximity operations trainer SPP security practice and procedures SPP signal preprocessor SPP Simulation Planning Panel SPP solar physics payload SPP SPIF processing procedure SPPIL Shuttle preferred pyrotechnic items list SPPL spare parts provisioning list SPPM system performance prediction model SPR software problem report SPR subcontractor performance review SPRAG STS Payload Requirements and Analysis Group SPRD system performance requirements document SPRU standard power regulator unit SPS satellite power system SPS secondary propulsion system SPS service propulsion system (subsystem) SPS Shuttle procedures simulator SPS Shuttle processing site SPS software product specification SPS software productivity solution SPS statement of prior submission SPSL space parts selection list SPSS science planning and scheduling system SPST single pole, single throw SPT steering position transducer SPTD supplemental provisioning technical documentation SPTI structural program test input SPUR separate parts usage record SPVPF Shuttle Payload Vertical Processing Facility SPWG Spare Parts Working Group SQA software quality assurance SQA subcontractor quality assurance SQC statistical quality control SQE software quality evaluation SQE supplier quality evaluation SQEP software quality evaluation plan SQH supplier quality history SQIDS satellite quick-look interactive display system SQL Standard Query Language SQPSK sequential phase shift keying SQW square wave SR safety review SR status review SR sunrise SR support request SR support room SR saturable reactor SR scan ratio SR shift register SR shop release SR standard repair SR statement of requirements SR status register SR status report SR&PA safety, reliability, and product assurance SR&Q safety, reliability, and quality SR&QA safety, reliability, and quality assurance SRA spin reference angle SRA spin reference axis SRA support requirements analysis SRA system requirements analysis SRAD Shuttle radar assembly demonstration SRAD space radiator assembly demonstration SRAG Space Radiation Analysis Group SRAM short-range attack missile SRAM static random access memory SRAT short-range advanced technology SRB Safety Review Board SRB Software Review Board SRB solid rocket booster SRB system requirements baseline SRBAB SRB Assembly Building SRBARF SRB Assembly and Refurbishment Facility SRBDF SRB Disassembly Facility SRC sample return canister SRCB Simulation Requirements Control Board SRCB Software Requirements Change Board SRCBD Software Requirements Change Board directive SRD Shuttle requirements definition SRD Shuttle requirements document SRD Spacecraft Research Division SRD systems requirements document SRDCS simulation reconfiguration data collection system SRDH System Requirements Definition Handbook SRE SASCB responsible engineer SRE STDN ranging equipment SREM software requirements methodology SREM system requirement engineering methodology SRF Shuttle Refurbishment Facility SRH Subsystem Requirements Handbook SRH System Requirements Handbook SRHIT small radar homing interceptor technology SRHIT small radar-hardening interceptor technology SRI Southwest Research Institute SRIP security requirements implementation plan SRJE SNA remote job entry SRL single-rack laboratory SRL Space Radar Laboratory SRM solid rocket motor SRM spares requirement model SRM Specification Requirements Manual SRM standard reference material SRM&QA safety, reliability, maintainability, and quality SRMC stimulus-response measurements catalog SRMS Shuttle remote manipulator system SRN software release notice SRO superintendent of range operations SRO supervisor of range operations SRP seat reference plane SRP seat reference point SRP stabilizer reference plane SRP standard repair procedure SRPA spherical retarding potential analyzer SRPS secure record and playback subsystem SRR Shuttle requirements review SRR site readiness review SRR software requirements review SRR specification readiness review SRR subcontractor readiness review SRR system requirements review SRRID site readiness review item document SRS short register to storage SRS simulated remote station SRS simulation reconfiguration system SRS simulation recording system SRS software requirements specification SRS specification review sheet SRS specification revision sheet SRS stellar radiation sensor SRS support requirements system SRSCC simulated remote station control console SRSI simulated reusable surface insulation SRSR schedule and resources status report SRSS Shuttle range safety system SRT safety review team SRT Shuttle requirements traceability SRT special rated thrust SRT specification requirements table SRT station readiness test SRT supporting research and technology SRT system readiness test SRT system requirements test SRU shop repairable unit SRU shop replaceable unit SRU space replaceable unit SRW standard reaction wheel SS second structure SS Space Station SS space segment SS space sphere SS stainless steel SS station set SS structures subsystem SS subsystem SS sun sensor SS support subsystem SS system software SS segment specification SS system specification SS system summary SS set screw SS short scarf (thruster nozzle) SS Shuttle system SS single side band SS single signal SS single string SS Space Shuttle SS&A space systems and applications SSA S-band single access SSA Shuttle simulation aircraft SSA Software Support Agency SSA software safety analysis SSA space suit assembly SSA system support analysis SSAD software system analysis document SSAD system summary acceptance document SSAIAF Space Systems Automated Integration and Assembly Facility SSAS STS/SSPE attachment system SSAT Space Shuttle access tower SSAT system segment acceptance test SSB single side band SSB Source Selection Board SSBC summary sheet bar chart SSBN fleet ballistic missile submarine SSBUV Shuttle solar backscatter ultraviolet SSBW spread-spectrum bandwidth SSC sensor signal conditioner SSC Shuttle system contractor SSC solid-solution cermet SSC solid-state circuit SSC Stennis Space Center (formerly National Space Technology Laboratories) SSC subsystem computer SSC system sequence controller SSCA surface sampler control assembly SSCB Space Station Control Board SSCC Space Station Control Center SSCC Support Services Control Center SSCF Space Station Control Facility SSCHS Space Shuttle cargo handling system SSCL Shuttle system commonality list SSCM Space Station cost model SSCP small self-contained payload SSCR support software change request SSCSP Space Shuttle Crew Safety Panel SSD Space Systems Division (Rockwell) SSD Space Systems Division (USAF) SSD Spacecraft Software Division (NASA) SSD system summary display SSDAC Space Station data acquisition and control SSDB spin system distribution box SSDD software system design document SSDF Space Science Development Facility SSDH Subsystem Data Handbook SSDO steady-state design and optimization code SSDS Space Station data system SSDSAS Space Station Data System Architecture Study SSE software support environment SSE system security engineering SSE software support equipment SSE sortie support equipment SSE Space Shuttle engine SSE space support equipment SSE spacecraft simulation equipment SSE subsystem element SSE system (subsystem) support equipment SSE system safety engineering SSEDF Software Support Environment Development Facility SSEM system security engineering manager SSEOS Space Shuttle engineering and operations support SSEOS Space Station external operations simulator SSEP system security engineering phase SSEP system security engineering plan SSES software system environment system SSEUWG SSE Users' Working Group SSF Space Station Freedom SSF SRB storage facility SSFCS Space Shuttle flight control system SSFGSS Space Shuttle Flight and Ground System Specification SSFL Santa Susana Field Laboratory SSFN Space Station flight network SSFP Space Station Freedom Program SSFS Space Shuttle functional simulation SSG Sensor Systems Group SSGDAC Space Station guidance, dynamics, and control SSH simulation support hardware SSHA Shuttle system hazard analysis SSHA subsystem hazard analysis SSHB Station Set Handbook SSI San Salvador Island SSI sector scan indicator SSI significant structural item SSI space segment integration SSIBD Shuttle system interface block diagram SSIE Smithsonian Science Information Exchange SSIP Shuttle Student Involvement Project SSIP system software interface processing SSIS Space Station information system SSITP Shuttle system integrated test plan SSL site support list SSL system software loader SSL system specification language SSLV standard small launch vehicle SSM satellite survivability model SSM second surface mirror SSM site status message SSM spacecraft system monitor SSM subsystem manager SSM subsystem model SSM support system module SSM systems support module SSMB Space Shuttle maintenance baseline SSMC Space Shuttle Mission Control SSME Space Shuttle main engine SSMEC Space Shuttle main engine controller SSMECA SSME controller assembly SSMTF Space Station Man-Systems Training Facility SSMTF Space Station Mockup and Trainer Facility SSN Social Security number SSO safety signification operation SSO source selection official SSO Space Shuttle orbiter SSO subsystem operation (in Spacelab) SSO system security officer SSO Systems Software Office SSODB Space Station Operational Data Book SSODC steady-state off-design code SSOP space systems operating procedure SSP security system plan SSP small sortie payload SSP Space Shuttle Program SSP Space Station Program SSP spread spectrum SSP standard switch panel SSP subsolar point SSP system security plan SSPC Spacelab stored program command SSPD Shuttle system payload data SSPD Shuttle system payload definition SSPD Shuttle system payload description SSPDA Space Shuttle payload data activity SSPDB subsystem power distribution box SSPDS Space Shuttle Payload Data Study SSPE Space Station Program element SSPF Sortie Software Production Facility SSPF Space Shuttle Programming Facility SSPF Space Station Processing Facility SSPFA Space Shuttle Program flight assignment SSPGSE Space Shuttle Program ground support equipment SSPII Space Shuttle Program implementing instruction SSPM Software Standards and Procedures Manual SSPM solid-state photomultiplier SSPM Space Shuttle program manager SSPM Standards and Procedures Manual SSPM System Safety program manager SSPO Space Shuttle Program Office SSPO Space Station Projects Office SSPP Space Station Program participant SSPP system safety program plan SSPPM SPADOC system performance prediction model SSPPSG Space Shuttle Payload Planning Steering Group SSPRO Space Shuttle Program Resident Office SSPS solar satellite power station SSPS Space Shuttle Program schedule SSPTF Santa Susana Propulsion Test Facility SSR shop support request SSR software specification review SSR staff support room SSR station set requirement SSR system safety review SSR system status review SSRD station set requirements document SSRImp Space Station resource impact model SSRMS Space Station remote manipulator system SSRN system software reference number SSROP Space Station Resource Optimization Program SSRP System Safety Review Panel SSRR station set requirements review SSRT STS Security Review Team SSS scanning star simulator SSS subsystem segment SSS system and segment specification SSS system security standard SSS system segment specification SSS sensor support system SSS simulation study series SSS sortie support system SSS Space Shuttle segment (NASA) SSS spacecraft software system SSS spinning sun sensor SSS stage separation subsystem SSS station set specification SSSC Space Station Support Center SSSS Space Shuttle System Specification SSSSR Space Shuttle system safety review SSST Space Station system trainer SST seamless steel tubing SST subsystem test SST supersonic transport SST Shuttle system test SST simulated structural test SST simulation and systems test SST single system trainer SST space surveillance and tracking SST spacecraft systems test SST structural static test SST subsystem terminal (on Spacelab) SSTC Space Shuttle test conductor SSTCLS Space Shuttle test, checkout, and launch support SSTF Space Station Training Facility SSTMO Single Stage To Mars Orbit SSTO single stage to orbit SSTOM SAIL system and test operations manager SSTS satellite surveillance and tracking system SSTS space surveillance and tracking system SSTS space-based surveillance and tracking system SSUS spinning solid upper stage SSUS-A SSUS for Atlas-Centaur-class spacecraft SSUS-D SSUS for Delta-class spacecraft SSUSP spinning solid upper stage project SSV Space Shuttle vehicle SSV space sortie vehicle SSVS subsystem verification specification SSWG Shuttle Security Working Group SSWP Space Station work package ST self-test ST star tracker ST system test ST sequential timer ST serial traceability ST shock tunnel ST simplification task ST single throw ST space telescope ST Spacelab technology ST special tooling ST&E security test and evaluation STA Shuttle training aircraft STA static test article STA structural test article STACC standard telemetry and communications component STADAC station data acquisition and control STADAN satellite tracking and data acquisition network STADAN space tracking and data acquisition network STADU system termination and display unit STAG secure text and graphics STAG Shuttle Turnaround Analysis Group STAMP system testability and maintainability program STAPPMAN Station Payload Propulsion Manifesting Program STAR scientific and technical report STAR Shuttle Turnaround Analysis Report STAR significant technological achievement in research STAR significant technology achievement through research STAR software tools and requirements STAR source transmission and response STAR space taxi and recovery STAR space transportation automated reconfiguration STARE staring technology advanced research and evaluation STARR Schedule, Technical, and Resources Report STARS software technology for adaptable and reliable systems STARS software technology for adaptable, reliable software STARS space transportation automated reconfiguration system STARS status analysis and reporting system START selection to activate random testing START Strategic Arms Reduction Talks STAS Space Transportation Architecture Study STAT system testability and analysis tool STATS star tracker alignment test set STBE space transportation booster engine STC Satellite Test Center STC Satellite Tracking Center STC sensitivity time control STC short-time constant STC Shuttle test conductor STC Space Technology Center STC spacecraft test conductor STC standard test configuration STC systems test complex STCC STS Transportation Coordination Center STCP short-term cost plan STCS special telemetry conversion system STD sensor and test driver STD Shuttle test detector STD software test description STD Spacecraft Technology Division STD special test device STD standard test device STDL standard distribution list STDN space flight tracking and data network STDN spacecraft tracking and data network STE special test equipment STE system test engineer STEP space test experiments platform STEP Surveillance and Tracking Experiment Program STF S-band temperature (Fahrenheit) STF satellite test facility STF spin test facility STF standard task file STG Shuttle Test Group STG Space Task Group STI screw thread insert STI Stanford Telecommunications, Incorporated STIC Space Test Integration Contract (contractor) STIL Software Test and Integration Laboratory STINFO scientific and technical information STIRD SAIL test implementation requirements document STIVE standard interface verification equipment STL Space Technology Laboratories STL System Test Laboratory STLDD software top-level design document STLOS star line of sight STM signal termination module STM SMS test matrix STM static test model STM structural test model STM system termination module STM systems test missile STME space transportation main engine STMU special test and maintenance unit STN software trouble note STO Solar Terrestrial Observatory STO subtask officer STOL short takeoff and landing STOP SCOMP-trusted operating program STP satellite test program STP static test program STP subsystem test plan STP system test plan STP systems technology program STP self-test program STP Shuttle Technology Panel STP software technology program STP software test plan STP software test procedure STP space technology payload STP space test program STP standard temperature and pressure STPH static phase error STR software test report STR system test review STRADEM strategic defense effectiveness model STS Shuttle test station STS Space Transportation System STS structural transition section STS system test station STSAM Space Transportation System analysis model STSOC Space Transportation System Operations Contract STSOPO Space Transportation System Operations Program Office STSR system test summary report STSYM Space Transportation System model STU secure telephone unit STU special test unit STU static test unit STU systems test unit STV structural test vehicle STVS secure television system SU support unit SUBCON subsystem console SUI state unemployment insurance SUL software utilization list SUM Software User's Manual SUMC space ultrareliable modular computer SUMS Shuttle upper atmosphere mass spectrometer SUPSALV supervisor of salvage (U.S. Navy) SURE Shuttle users' review and evaluation SURRVS standard umbilical retraction retention vent system SURS standard umbilical retraction system SURS standard umbilical retraction/retention system SURTEX Shuttle-released target experiment SURTEX Shuttle-released technology experiment SURVIAC Survivability/Vulnerability Information Analysis SUSIM solar ultraviolet spectral irradiance monitor SUZ Santa Susana SV safety valve SV Shuttle vehicle SV side view SV solenoid valve SV space vehicle SV state vector SVA&C Shuttle vehicle assembly and checkout SVAB Shuttle Vehicle Assembly Building SVAC Shuttle vehicle assembly and checkout SVAFB South Vandenberg Air Force Base SVB Shuttle vehicle booster SVB space vehicle booster SVC spacecraft vehicle contractor SVC supervisor call SVCDS space vehicle computer design system SVCDS space vehicle control/display simulation SVCMU space vehicle control and monitor unit SVDS space vehicle dynamic simulator SVDS space vehicle dynamics simulation SVDT Space Vehicle Development Team SVE space vehicle equipment SVIU space vehicle interface unit SVO space vehicle operations SVO Sunnyvale Operations SVOD space vehicle operations director SVP software verification procedure SVR space vehicle requirement SVRR software verification readiness review SVS Shuttle vehicle simulator SVS space vehicle system SVS suit ventilation system SVT space vehicle test SVTN secure voice telecommunications network SVTN secure voice teleconference network SW seawater SW shortwave SW software SW solar wing SW spot weld SW status word SW switchboard wound SWA support work authorization SWAD subaccount work authorization document SWAD subdivision of work authorization document SWAT stress wave analysis technique SWATEC short-wavelength thermoelectrically cooled SWB Solder Waiver Board SWCC Southwestern Computing Center SWCDR software critical design review SWCI software configuration inspection SWD&I software development and integration SWEE software engineering environment SWG Schedule Working Group SWG Science Working Group SWG Security Working Group SWG Software Working Group SWIFET short-wave infrared field effect transistor SWIFET switched field effect transistor SWIR short-wavelength infrared SWOB salaries, wages, overhead, and benefits SWP safe working pressure SWPA Shuttle wing panel analysis SWPDR software preliminary design review SWR standing wave ratio SWRR software readiness review SWS software system SWS switch scan SWT supersonic wind tunnel SWWG Software Working Group SY shoulder yaw SYSREM system requirements engineering methodology SYSTRAN systems analysis translator Si:X extrinsic silicon Si:Xx arsenic-doped silicon detector (low-noise approach) Si:Yy gallium-doped silicon detector (high-risk approach) SiC/Al silicon carbide/aluminum SiCp particulate silicon carbide SiCw whisker-filled silicon carbide Syncom synchronous communication satellite T temperature rate T&C telemetry and control T&C terms and conditions T&C test and checkout T&C tracking and communication T&CD timing and countdown T&CP test and checkout procedure T&D transportation and docking T&E test and evaluation T&F time and frequency T&M time and material T&O test and operations T&P tracking and processing T&QA test and quality assurance T+ time after launch T- time before launch T-0 time minus zero T-0 time zero T-O takeoff T/A turnaround T/B talkback T/B thermal barrier T/B title block T/C telecommunications T/C temperature-compensating T/C termination check T/C thermal capacitor T/C thermocouple T/C thrust chamber T/C training and certification T/CAP thermal capacitor T/CD timer/command distributor T/CRD telemetry/command requirements document T/D time delay T/D touchdown T/E transporter/erector T/L talk and listen T/L trace by lot number T/L transformer load T/M trace by member number T/MGS transportable mobile ground station T/O takeover T/R tape recorder T/R transformer rectifier T/R transmit-receive T/R turnaround requirement T/S time-sharing T/S traceability by serial number T/S troubleshoot T/T terminal timing T/T timing/telemetry T/TCA thrust translation control assembly T/V thermal vacuum T/W thrust-to-weight ratio TA task analysis TA travel authorization TA trunnion angle TA type approval TA task assessment TA task assignment TA task authorization TA Teal Amber TA test announcer TA test article TA time actual TA transfer aisle TAA technical assistance agreement TAB targets and background TAB Technical Advisory Board TAB time after burst TABI tailorable advanced blanket insulation TAC Tactical Air Command TAC test and configuration TAC timing and address counter TAC total average cost TAC traceability and configuration TACAN tactical air control and navigation TACAN tactical air navigation TACAN tactical navigation TACANS tactical air control and navigation system TACATA air-launched antisatellite system TACC Tactical Air Control Center TACCS time, age, and cycle control system TACO test and checkout TACO test and checkout operations TACP training and certification plan TADS trade and analysis data system TAEM terminal area energy management TAF truss assembly fixture TAG technical air to ground TAGS technique for automated generation of systems TAGS technology for the automated generation of systems TAGS text and graphics system TAGS thermal analysis graphics system TAIR test and inspection record TAIR test assembly inspection record TAL transatlantic abort landing TAL transatlantic landing TALAR tactical approach and landing radar TALO time after lift-off TAM thermal analytical model TAMS trade and analysis management system TAMS transient amplitude monitor system TAN Tananarive, Madagascar (STDN site) TAP technical achievement plan TAP technical assistance plan TAP telemetry acceptance pattern TAP test administration plan TAP total air pressure TAR technical analysis request TAR test action requirement TAR test agency report TARC through-axis rotational control TARE telemetry automatic reduction TARS three-axis reference system TAS telemetry antenna system (subsystem) TAS test article specification TAS true airspeed TASPR Technical and Schedule Performance Report TAT total air temperature TAT turnaround time TATI total air temperature indicator TAVERNS Test and Verification Environment for Remotely Networked Systems TB talkback TB terminal base TB terminal board TB thermal barrier TB time base TB toggle buffer TB transverse boom TBA to be added TBA to be announced TBC The Boeing Company TBCM target background characterization model TBD to be determined TBD to be developed TBE Teledyne Brown Engineering TBE to be evaluated TBG gyro-to-body transformation matrix TBI body axis-to-inertial transformation matrix TBI through-bulkhead initiator TBM table buffer management TBM tactical ballistic missile TBN to be negotiated TBP to be provided TBR to be revised TBS task breakdown structure TBS to be specified TBS to be superseded TBS to be supplied TBTD thermal bus technology demonstrator TC telecommunications TC traceability code TC tracking camera TC transfer control TC transition control TC translation control TC temperature compensating TC test change TC test condition TC test conductor TC thermal control TC thermocouple TC thrust chamber TC time to circular TCA temperature control amplifier TCA thrust chamber assembly TCA time of closest approach TCA translation controller assembly TCAB temperature of cabin TCATA TRADOC combined arms test activity TCB technical coordination bulletin (MSFC) TCC Test Control Center TCC test classification code TCC test conductor's console TCC thermal control coating TCC Transportation Control Center TCCM temperature-controlled crystal microbalance TCD test completion date TCD test control document TCD timing control distributor TCE thermal canister experiment TCF tank checkout facility TCFP thrust chamber fuel purge TCG Test Control Group TCG time code generator TCI technical critical item TCI terrain clearance indicator TCID test configuration identifier TCLE thermal coefficient of linear expansion TCM target cost per mission TCM technical control management TCM technical coordination meeting TCMD transportation control and movement document TCN test change notice TCN training course number TCN transportation control number TCO taken care of TCO test and checkout TCOA translational Control A TCOB translational Control B TCOP test and checkout plan TCP task change proposal TCP task control package TCP test and checkout procedure TCP test case procedure TCP test checkout procedure TCP test control package TCP thrust chamber pressure TCP tricalcium phosphate TCP/IP transmission control protocol/internet protocol TCPE total cargo project engineer TCR test compare results TCR test constraints review TCR thermal concept review TCRB Test Change Review Board TCRB Test Criteria Review Board TCRD test and checkout requirements document TCRS training and certification records system TCRSD test and checkout requirements specification TCS technical change summary TCS temperature control system TCS test control sequence TCS test control supervisor TCS test control system TCS thermal control system (subsystem) TCSC trainer control and simulation computer TCSSS thermal control subsystem segment TCT test coordination team TCTI time compliance technical instruction TCTO time compliance technical order TCTR time compliance technical requirement TCU tape control unit TCV temperature-controlled voltage TCV thrust chamber valve TD task directive TD technical direction TD technical directive TD technology data TD technology demonstration TD terminal distributor TD time delay TD touchdown TD training division TD&SA telephone, data, and special audio TDA trunnion drive axis TDAAS Two-Dimensional Data Assessment and Applications Study TDB target deployment bus TDB time duration of burn TDB Tranet Doppler beacon TDC telemetry data center TDD task description document TDDB Thermodynamic Design Data Book TDDP trajectory design data package TDF telemetry data file TDF telemetry data format TDI time delay integration TDI time-delayed integration TDIF TOPEX Data Information Facility TDM technology development mission TDM time division multiplexer TDM time division multiplexing TDMA time division multiple access TDMS terminal data management system TDP technology demonstration plan TDP temperature and dew point TDP tracking data processor TDPD technical data program document TDR technical data report TDR technical design review TDR technical documentation report TDR test discrepancy report TDRB Tool Design Review Board TDRS telemetry downlink receiving site TDRS tracking and data relay satellite TDRSS tracking and data relay satellite system TDS technology demonstration satellite TDS test data system TDSP time-dependent signal processor TDT telemetry data tape TDT tower disconnect technician TDU time display unit TDV test data van TDV tool design variance TDY temporary duty TE test equipment TE time earliest TE time expected TE timing electronics TE trailing edge TE trans-Earth TE transmission error TE transporter erector TE transverse electric TEA torque equilibrium attitude TEB tone-encoded burst TEC test equipment center TEC trans-Earth coast TED Test Evaluation Directorate TED threat environment description TED trailing edge down TEG Technical Evaluation Group TEI trans-Earth injection TEISC test and evaluation information support capability TELECON telecommunication satellite (French-German) TELESAT Canadian payload TELESAT telecommunications satellite TEM target engine module TEM transmission electron microscope TEM transverse electromagnetic TEMP test and evaluation master plan TEMPEST Air Force security program TEMS transport environment monitoring system TEOS tetraethyl orthosilicate TEP Technical Evaluation Panel TEP test and evaluation plan TER test equipment readiness TER time estimating relationship TER travel expense report TERL test equipment readiness list TEST time-efficient sequencer of tests TET trajectory events time line TETRA terminal tracking telescope TEV target engine vehicle TEXSYS thermal control system diagnosis expert system TF test facility TF test fixture TFC time from cutoff TFCS triplex flight control subsystem TFE time from event TFF time to free fall TFI technology flight instrumentation TFI time from ignition TFL telemetry format load TFL time from launch TFM target incentive fee per mission TFO transferring from original TFOV total field of view TFR trouble and failure report TFS telemetry format selection TFU test facility utilization TFU theoretical first unit TG tail gear TG Talon Gold TG technical guidance TG test guideline TGA thermal gravimetric analysis TGA thermogravimeter analyzer TGA trace gas analyzer TGE Talon Gold Experiment TGG third-generation gyro TGIR test generation with infrared reasoning TGO time to go TGOWG Teleoperator Ground Operations Working Group TGS telemetry ground station TGS telemetry ground system TGSE telemetry ground support equipment TGTV Talon Gold target vehicle THA thermal hydraulic analyzer THAP thermal/hydraulic analyzer digital computer program THC total hydrocarbon THC translational hand control THC translational hand controller THDS time homogeneous data set THP thrust horsepower TI Information Systems (KSC) TI technical integration TI technical interchange TI temporary installation TI terminal phase initiation TI test instruction TI timing interface TI training integrator TIATA technical information and training authoring TIC Technical Information Center TIC total item change TICM test interface and control module TIDDB Thermal Interface Design Data Book TIE technology integration experiment TIFDL TOPEX interfacility data link TIFS total in-flight simulator TIG time of ignition TIG tungsten inert gas TII tooling inspection instrumentation TIL Technology Insertion Laboratory TIM technical interchange meeting TIM technical interface meeting TIMM thermally integrated micromodule TIMO temporary installation manufacturing order TIO target insertion orbit TIP target instrument payload TIP Technical Integration Panel TIP thrust inlet pressure TIPEX test in progress executive TIPS thruster instability protection system TIPS tile information processing system TIR temporary installation record TIR terminal imaging radar TIR total indicator reading TIRAD tool for infrared algorithm development TIROS television infrared observation satellite TIS test information sheet TIS test interface subsystem TIWG Technical Interface Working Group TJ tower jettison TJM tower jettison motor TKI trail kit installation TL talk-listen TL test load TL thrust level TL thrust line TL time latest TL time line TL transient load TL transmittal letter TLCE transmission line conditioning equipment TLCN test logic and constraint network TLCSC top-level computer software component TLD thermoluminescent dosimeter TLF terminal launch facility TLG tail landing gear TLI translunar injection TLS time line sheet TLS top left side TLSA torso limb suit assembly TLV target launch vehicle TLV threshold limit value TLV transporter-loader vehicle TM task master TM transverse magnetic TM technical management TM technical manual TM technical memorandum TM test maintenance TM time management TM torque motor TM traffic manager TM traffic model TMA technology mirror assembly TMA thermomechanical analyzer TMB transportation management bulletin TMBU table maintenance block update TMC test monitoring console TMCC temporary MCC TMECO time of main engine cutoff TMF training mission facility TMF transporter maintenance facility TMG thermal meteoroid garment TMG traffic management TMI test method instruction TMI transmars injection TMIS technical management information system TML total mass loss TMM thermal math model TMO test management order TMO test manufacturing order TMO tool manufacturing order TMOS two main orbiting spacecraft TMP terminal panel TMP time management processor TMPV torque motor pilot valve TMR TOPEX microwave radiometer TMS task management system TMS technical management system TMS teleoperator maneuvering system TMS time-sharing system TMS trend monitoring system TMS-AIMME The Metallurgical Society, American Institute of Mining, Metallurgy, and Engineering TMU temperature measurement unit TN technical note TO takeoff TO takeover TO task order TO technical order TO tool order TOA time of arrival TOC Tactical Operations Center TOC Test Operations Center TOC test operations change TOD time of day TOD tour of duty TOF test operations facility TOI transfer orbit insertion TOM target object map TOM task ordering management TON test operation notice TOO target of opportunity TOP technical operating procedure TOP technical operations procedure TOP test operational plan TOP transportable office protocol TOPEX Ocean Topography Experiment TOPS transfer orbit perigee stage TOPS transistorized operational phone system TOR technical operating report TOR test operating report TOS teleoperator system TOS test operating system TOS transfer orbit stage TOW tank and orbiter weight TP test point TP test port TP test procedure TP time to perigee TP training plan TP transition period TP true position TP turbopump TP&C thermal protection and control TPA test planning analysis TPA test preparation area TPA turbopump assembly TPAD trunnion pin acquisition device TPC technical performance criteria TPC telemetry preprocessor computer TPCN technical program change negotiation TPCN test plan change notice TPD terminal protection device TPDS test procedures development system TPE test project engineer TPE tracking and pointing experiment TPF terminal phase final (maneuver) TPF terminal phase finalization (braking) TPF terminal phase finish TPF transfer phase final TPF tug processing facility TPI terminal phase initiation TPITS two-phase integrated thermal system TPL transpacific landing TPM technical performance measurement TPM terminal phase maneuver TPM terminal phase midcourse TPM transfer phase midcourse TPMS technical performance measurement system TPO tank pressurizing orifice TPO test program outline TPOCP turbopump oxidizer cavity purge TPP test point PACE TPR technical progress review TPR test problem report TPR training personnel requirement TPS test preparation sheet TPS thermal protection system (subsystem) TPS training planning system TPS twisted pair shielded TPSS test preparation sheet summary TPTA transient pressure test article TPTG tuned plate, tuned grid TPUN test procedure update notice TQE timer queue element TQI total quality involvement TQM total quality management TQP total quality program TR tape recorder TR transportation request TR Teal Ruby TR technical report TR test request TR thrust reverser TR time to retrofire TR tool request TR transistor/receiver TR transmitter/receiver TR/SBS teleoperator retrieval/Skylab boost system TRA test requirements analysis TRA training requirements analysis TRA turnaround requirements analysis TRAC total record access control TRACS tool record accountability system TRACS transaction record accountability and control system tission security TRAP Transient Response Analysis Program TRASYS thermal radiation analysis system TRB Test Review Board TRCP tape recorder control panel TRD technical requirements data TRD technical requirements document TRD test requirements document TRDA three-axis rotational control, Direct A TRDB three-axis rotational control, Direct B TRDDS Teal Ruby data documentation system TRDF Teal Ruby data formatter TRE Teal Ruby Experiment TRE training equipment TRE/ITU Teal Ruby Experiment/infrared telescope unit TRED TRASYS editor TREMOC Teal Ruby Experiment Mission Operations Center TREND technical requirements engineering network data base TRF tuned radio frequency TRGD technical requirements and goals document TRIC transition radiation and ion calorimeter TRIM testing for reliability by incremented maximization TRIS test and reliability information system TRL test readiness list TRMS technical requirements management system TRN task requirements notice TRNA three-axis rotational control, Normal A TRNB three-axis rotational control, Normal B TRON time rationale organizational notation TRP Technical Review Panel TRPD test requirements and plan documentation TRR tape recorder reproducer TRR technical requirements review TRR test readiness review TRR test requirements review TRRU tape recorder reproducer unit TRS Teal Ruby spacecraft TRS teleoperator retrieval system TRS telerobotics servicer TRS test requirements sheet TRS time reference system TRS top right side TRS training record system TRS troubleshooting record sheet TRS tug rotational system TRSD test requirements and specification document TRSD test requirements specification document TS target system TS tracking subsystem TS Technical Support (KSC directorate) TS tensile strength TS test site TS test stand TS test station TS time scheduled TS timing system (subsystem) TS tool steel TS&ET test support and evaluation team TS-C tooling supplement to contract TSA test start approval TSAC tracking system analytic calibration TSB temporary stowage bag TSB twin side band TSC Technical Support Center (MSFC) TSC test setup complete TSC test support coordinator TSC tooling supplemental contract TSCD test specification control document TSCM technical survey countermeasure TSCO Test Support Coordination Office TSCP training simulator control panel TSCS test support computer system TSD Technical Services Division TSD test start date TSE team supportability element TSE test support equipment TSE transportation support equipment TSG threat scenario generator TSGP test sequence generator program TSL test support language TSLD troubleshooting logic diagram TSM tail service mast TSM test support methodology TSM trade study management TSMD time-stress measurement device TSMT technical support management team TSO time since overhaul TSO time-sharing operations TSO time-sharing option TSP test software program TSP trajectory shaping program TSP trajectory synthesis program TSP twisted shielded pair TSR technical status review TSR test schedule report TSR test status report TSR trade study report TSRA total system requirements analysis TSS telemetry simulation/system TSS terminal security system TSS terminal support system TSS test software support TSS test support system TSS tethered satellite system TSS time-sharing system TSS tug structural support TSSU test signal switching unit TST time-sharing terminal TSU time standard unit TSW test software TSW test switch TT terminal timing TT thrust termination TT total time TT&C telemetry, tracking, and communications TT&C tracking, telemetry, and command TT&C tracking, telemetry, and control TT&E test, teardown, and evaluation TTA thermomechanical test area TTA time to apogee TTB technology test bed TTC telemetry, tracking, and command TTC tunnel thermal control TTCA thrust translation controller assembly TTCV tracking, telemetry, command, and voice TTE test teardown and evaluation TTE time to event TTEL tool and test equipment list TTESP test time event sequencer plan TTF transition task force TTG time to go TTG transition task group TTL transistor-transistor logic TTOF thermally tunable optical filter TTP time to perigee TTT through the thickness TTU timing terminal unit TTVC test termination and verification contractor TTY DACP test set TTY teletype TU technical utilization TU technology utilization TU transport unit TUFI toughened unipiece fibrous insulation TV target vehicle TV television TV thermal vacuum TV thrust vector TV transport vehicle TV transporter vehicle TVA temporary variance authority TVA thrust vector alignment TVAR test variance TVC thermal vacuum chamber TVC thrust vector control TVCD thrust vector control driver TVCS thrust vector control system TVD total variation diminishing TVE technology validation experiment TVE test evaluation experiment TVEXPIS TV experiment interconnecting station TVN test verification network TVP test verification program TVS toxic vapor suit TVSA thrust vector servoamplifier TVSSIS TV subsystem interconnecting station TVT thermal vacuum test TVTA thermal vacuum test article TW tactical warning TW tail wind TW threat warning TW thumb wheel TW time word TW traveling wave TW/AA tactical warning/attack assessment TWD tail wags dog TWDS twisted double shielded TWG transition working group TWL threat wavelength TWT transonic wind tunnel TWT traveling-wave tube TWTA traveling-wave tube amplifier TWU Transportation Workers Union of America TWX teletype wire transmission TX transmit channel U-SB unified S-band U/B usage block U/C undercurrent U/C user code U/D update U/F unique file U/IP user/international partner U/L uplink U/M unit of measure U/M unmanned U/M unscheduled maintenance U/O used on U/V undervoltage U/W used with UA unexplained anomaly UAC unattended assembly call UAD user accommodation document UAL United Airlines UARS upper atmosphere research satellite UART universal asynchronous receiver transmitter UAW United Auto Workers UB upper brace UB utility bridge UBER undetected bit error rate UC unsatisfactory condition UCAR unsatisfactory condition action report UCC universal checkout console UCD urine collection device UCN uniform control number UCR unsatisfactory condition report UCS universal control system UCS utilities control system UCTA urine collection transfer assembly UDB update buffer UDC utility distribution center UDF unit development folder UDF utility and data flow UDL up-data link UDL update link UDMH unsymmetrical dimethylhydrazine UDMH/H unsymmetrical dimethylhydrazine hydrazine blend UDOP ultrahigh Doppler UDS universal documentation system UDS utility distribution system UE user equipment UER unique-equipment register UFD user file directory UFF upper forward fuselage UHF ultrahigh frequency UHT umbilical handling technician UI unit of issue UI user interface UIIP user integration implementation plan UIMS user interface management system UIWG User Interface Working Group UK United Kingdom UL underload UL uplink UL upper left (S-band antenna) UL upper limit ULA Fairbanks, Alaska (STDN site) ULC unpressurized logistics carrier ULCI unpressurized logistics carrier interface ULE ultralow expansion (quartz) ULI Underwriters' Laboratories, Incorporated ULM unpressurized logistics module ULO unmanned launch operations ULS upload station ULV unmanned launch vehicle UM unmanned UM unscheduled maintenance UMIF upper mechanical integration frame UMO unmanned orbital UMPS up mission processing start UMVF unmanned vertical flight UNEP United Nations Environmental Program UPF universal patch format UPGWA United Plant Guard Workers of America UPL unapproved parts list UPN unique program number UPP user parameter processor (processing) UPS uninterruptible power system UPS upright perigee stage UPWT unitary plan wind tunnel UR unsatisfactory report UR&C usual, reasonable, and customary URA urine receptacle assembly URE user range error US upper stage US user segment USA-2D/3D unified solutions algorithm 2-dimensional/3-dimensional USAF United States Air Force USASDC U.S. Army Strategic Defense Command USASDG U.S. Army Space Defense Group USB unified S-band USB upper side band USBE unified S-band equipment USBI United Space Booster, Incorporated USBS unified S-band system USC upper stage contractor USCG United States Coast Guard USE unique support equipment USE unobtrusive sensors and effectors USE user support environment USEIT user station evaluation integration and test USFWS United States Fish and Wildlife Service USI update software identity USI user system interface USML-1 United States Microgravity Laboratory-1 USNS United States Navy ship USO ultrastable oscillator USP uniform specification program USPHS United States Public Health Service USRA Universities Space Research Association USS umbilical separation system USS United States ship USS United States standard USS unmanned space satellite USS upper stage system (PAM-D and interfaces) USS utility support structure USSPACECOM United States Space Command USSR Union of Soviet Socialist Republics USVMS urine sample volume measuring system USWA United Steelworkers of America USWB United States Weather Bureau UT unit tester UT universal time UTC United Technologies Corporation UTC United Technology Center UTC universal test console UTC universal time compensated UTC user time clock UTE universal test equipment UTF Underwater Test Facility UTLM up telemetry UTRS universal trouble reporting system UTS universal test set UTS unmanned teleoperator spacecraft UTS urine transfer system UUT unit under test UV ultraviolet UV undervoltage UVAT ultraviolet automatic tracker UVD undervoltage device UVF unmanned vertical flight UVMS urine volume measuring system UVPE UV/video processing electronics UVS ultraviolet sensor UVW quasi-inertial, right-handed Cartesian coordinate system Unis Unified Information System V P-P volt peak-to-peak V volt V voltage V&DA video and data acquisition V&DA video and data assembly V&V verification and validation V-A vibroacoustic V-A volt-ampere V-CITE vertical cargo integration test equipment V-RTIF Vandenberg real-time interface V/A video/analog V/C vector control V/H velocity to height V/M velocity meter V/T voltage/temperature V/U vehicle utility V/V validation and verification V/V vent valve VA vibroacoustic VAA vehicle assembly area VAA visible acquisition aid VAACP visible acquisition aid control panel VAB Vehicle Assembly Building VAB Vertical Assembly Building VAC vehicle assembly and checkout VACTL Vertical Assembly Component Test Laboratory VADC venting analysis digital computer VAFB Vandenberg Air Force Base VAIB Vehicle Assembly and Integration Building VAK vertical assembly kit VAL network validity word VAN USNS Vanguard (STDN) VAPEPS vibroacoustic payload environment prediction system VAR variance analysis report VAR verification analysis report VAR verification analysis review VAR visual-aural radio range VAR volt-ampere reactive VAS visible-acquisition sensor VASI visual-approach slope indicator VAST versatile avionic system tester VAT vibroacoustic test VATA vibroacoustic test article VATF vibration and acoustic test facility VAX virtual address extended VBC video bandwidth compressor VC vector character VC velocity counter VC video camera VCB vertical location of the center of buoyancy VCC vehicle command count VCC vehicle crew chief VCC verification code counter VCC voltage change controller VCD verification control document VCG constant drag value VCG vapor crystal growth VCG vector cardiogram VCG vertical location of the center of gravity VCGS vapor crystal growth system VCI velocity change indicator VCL vehicle centerline VCM volatile condensable material VCN vehicle configuration number VCN verification change notice VCN verification completion notice VCO voltage control operator VCO voltage control oscillator VCO voltage-controlled oscillator VCP vehicle control processor VCPS verification completion planning sheet VCR videocassette recorder VCS vehicle cargo system VCS verification control sheet VCT voltage control transfer VCU video control unit VCXO voltage-controlled crystal oscillator VDA vapor-deposited aluminum VDA variable data area VDA video data assembly VDB verification data base VDD verification description document VDD version description document VDD visual display data VDE visual display equipment VDF validation data file VDI vector display indicator VDP variable-delivery pump VDS vehicle dynamic simulator VDS visual display system VDSS vehicle dynamic simulator system VDT vehicle data table VDU visual display unit VE equivalent velocity VE vehicle engineering VEB vehicle equipment bay VEDS vehicle emergency detection system VEEI vehicle electrical engine interface VEFCO vertical functional checkout VEI vehicle end item VEM viscoelastic materials VERLORT very long range tracking radar VF vertical flight VF video frequency VF voice frequency VFI verification flight instrumentation VFM viewfinder monitor VFN verification change notice VFO variable-frequency oscillator VFR visual flight rule VFT verification flight test VFT vertical flight test VG velocity generator VGIMU velocity to be gained as related to IMU orientation VGOR vehicle ground operation requirement VGP vehicle ground point VGRF Variable-Gravity Research Facility VGT vehicle ground test VGVT vertical ground vibration test VGVTA vertical ground vibration test article VGX velocity to be gained (body X-axis) VGY velocity to be gained (body Y-axis) VGZ velocity to be gained (body Z-axis) VH vent hole VHAA very high altitude abort VHF very high frequency (30 to 300 megahertz) VHF/AM very high frequency amplitude modulator VHF/DF very high frequency direction finder VHFOA VHF omnidirectional antenna VHM vehicle health monitoring VHSIC very high speed integrated circuit VIB Vehicle Integration Building VIB Vertical Integration Building VIC Visitor Information Center VIL vehicle integration and launch VIQ variation in quantity VIS verification information system VISTAR visible space tracking and reconnaissance VIT vehicle integration test VIU vehicle interface unit VIU video interface unit VJ vacuum-jacketed VLA verification loads analysis VLBI very long baseline interferometer VLC verification load cycle VLF Vertical Launch Facility VLF very low frequency VLPS Vandenberg launch processing system VLR very low range VLS Vandenberg launch and landing site VLS Vandenberg launch site VLS vertical launch system VLS visible-light sensor VLSI very large scale integration VLSIC very large scale integrated circuit VLSSM VLS support manager VLSST Vandenberg launch site support team VM virtual memory VM voltmeter VME vertical memory expansion VMF Vertical Maintenance Facility VMIR Vandenberg management integration review VMS vehicle management system VMS velocity measuring system VMS vertical motion simulator VMS virtual memory system VMSP VLS mission support plan VNB very narrow band VO Space Vehicle Operations (KSC directorate) VO vehicle operations VOCP vehicle-out-of-commission part VOGAD voice-operated gain-adjust device VOM voltohmmeter VOMP Vandenberg operational management plan VOR VHF omnidirectional radio range VOR voice-operated relay VOR-DME VHF omnirange UHF distance measuring equipment VORTAC variable omnirange tactical (VOR and TACAN) VOT VHF omni test VOX voice-operated transmitter VP vacuum pump VP verification polarization VP vertical polarization VP viewpoint VPD variable power divider VPF Vertical Processing Facility VPHD vertical payload handling device VPI valve position indicator VPK volts peak VPLCC Vehicle Propellant Loading Control Center VPM vehicle project manager VPPAW variable-polarity plasma arc welding VPSA vehicle processing storage area VR variable reluctance VR video recorder VR voltage regulator VR voltage relay VRAS verification requirements analysis sheet VRB VHF recovery beacon VRCS vernier reaction control system VRF vertical removal fixture VRG variable report generation VRH VAR-hour meter VRL vertical recovery line VRL vertical reference line VRP variability reduction program VRR verification readiness review VRS vendor rating system VSA variable-stability aircraft VSA verification site approval VSB vestigial side band VSC vehicle support contractor VSC vibration safety cutoff VSD vertical situation display VSI vertical speed indicator VSI video simulation interface VSMF vendor specification microfile VSN video switching network VSN volume serial number VSO very stable oscillator VSPC virtual storage personal computing VSTAG Vandenberg Shuttle Turnaround Analysis Group VSTAR Vandenberg Shuttle Turnaround Assessment Report VSWR voltage standing wave ratio VT vacuum tube VT voice tube VTAR verification test/analysis report VTBC vertical time bar chart VTCW vehicle time code word VTF Vertical Test Facility VTF vertical test flight VTM verification test matrix VTM vibration test module VTN verification test network VTOC visual table of contents VTP vehicle test plan VTP verification test plan VTP verification test program VTPS vibroacoustic test plan summary VTR video tape recorder VTS Vandenberg tracking station VTS verification test station VTS vertical test site VTS vertical test stand VTS vertical test system VTS vibroacoustic test summary VTVM vacuum tube voltmeter VU vehicle unit VU vehicle utility VU volume unit VUSW vehicle utility software VV vent valve VV vertical velocity VVI vertical velocity indicator VWFC very wide field camera VX velocity along the X-axis VY velocity along the Y-axis VZ velocity along the Z-axis Vac volts, alternating current Vdc volts, direct current Vrms volts root mean square W watt W&B weight and balance W&C wire and cable W-G water-glycol W/A work-around W/B wide band W/C workmen's compensation W/CDA weight/coefficient of drag times area W/E wing elevon W/E write/erase W/G water-glycol W/H wire harness W/S work station W/T wind tunnel W/W wheel wing W/WMS water/waste management system W/h watt hour W/m2 watts per square meter WA wide angle WA work authorization WAC world aeronautical chart WAD work authorization document WAD/SO work authorization document/shop order WADD Wright Air Development Division WAMP weight and mass property WAN wide area network WAN work authorization number WAR work authorization report WAR work authorization request WAT web action time WATS wide area telephone service WB water boiler WB wet bulb WB wet bulk WB wheel base WB wide band WBA wide-band amplifier WBC white blood cells WBD wide-band data WBFDM wide-band frequency division multiplexer WBR wide-band radiometer WBR workbench rack WBS work breakdown structure WBSC wide-band signal conditioner WBT wide-band terminal WBTCH water boiler thermal control hydraulics WBTS wide-band transmission system WC work control WCC Western Computing Center (Rockwell) WCC work control center WCCS window contamination control system WCCU wireless crew communication unit WCDB work control data base WCDDT wet countdown demonstration test WCL water coolant line WCL water coolant loop WCP weapon control platform WCP weight control program WCP wing chord plane WCP work control plan WCS waste collection system WCS waste collector system WCS wing center section WCS work control system WCS writable control storage WCSC West Coast Switching Center WD wage determination WD wired discrete WD withdrawn WD workday WDL Western Development Laboratory WDS wake deluge supply WEN write enable WER weight estimating relationship WETF Weightless Environment Test Facility (JSC) WFF Wallops Flight Facility WFMP work force motivation plan WFNA white fuming nitric acid WG waveguide WG working group WGAI working group agenda item WGM working group meeting WGSU water-glycol service unit WHETS whetstone benchmarking WHS White Sands, New Mexico WIB "when" interrupt block WIC warning information correlation WICOMO Wang Institute cost model WIF water immersion facility WILMA wire list management and accounting (KSC) WINDS weather information network display system WIP work in progress WIPICS work-in-process inventory control system WIS Wallops Island Station, Virginia WIS WWMCCS information system WIX wait for index WL waterline WL wavelength WL wire list WLOS window line of sight WLS western launch site WM waste management WM wattmeter WMC waste management compartment WMS waste management system WNINTEL warning notice intelligence sources or methods WO work order WOC work order control WOD word of day WODWNY Western Office, Downey WOM Woomera, Australia WON work order number WONG weight on nose gear WOO Western Operations Office (NASA) WOP wing outer panel WORM write-once, read-many WOW weight on wheels WOW worst on worst WOWLON weight on wheels longitudinal WP water plane WP waterproof WP way point WP weapons platform WP weatherproof WP work package WP working pressure WP wrist pitch WPAFB Wright-Patterson Air Force Base WPANL Wright-Patterson Aeronautical Laboratory WPD work package description WPD work program directive WPF work process flow WPG work package grouping WPI work process indicator WPM work package manager WPMCP work package manpower and cost plan WPP water pump package WPP work package plan WPPS work package planning sheet WPS weather protection system WR wrist roll WRL wing reference line WRO work release order WRP weight reduction proposal WRP wing reference plane WRT with request to WS water servicer WS weather stripping WS windshield WS work statement WS work station WSB water spray boiler WSC wide-band signal conditioner WSCC work station control center WSGR White Sands ground relay WSGT White Sands ground terminal WSMC Western Space and Missile Center WSMCR Western Space and Missile Center Range WSMCR Western Space and Missile Center regulation WSMR White Sands Missile Range WSO water servicer operator WSP work sequence plan WSPR weapon system problem report WSTA weapon system testability analyzer WSTF White Sands Test Facility WSTV W-sensor test vehicle WSU water servicing unit WSV weapon system vehicle WT watchdog timer WT watertight WT wind tunnel WT wire ticket WTA wire traceability and accountability WTR Western Test Range (VAFB) WTR work transfer record WTSC wet tantalum slug capacitor WTT wind tunnel test WUC work unit code WUCF work unit code file WUPL where-used parts list WUSCI Western Union Space Communications, Incorporated WVI work volume indicator WVIS work volume indicator system WW water waste WW wire wrap WW wire-wound WWMCCS worldwide military command and control system Wpc watts per candle X roll axis X- X-axis X-REF X-band RF electronics X-SAR X-band synthetic-aperture radar XEV Xerox encryption unit XL X-axis of Spacelab XO X-axis of orbiter XP X-axis of payload XPS X-ray photoelectron spectroscopy XS X-axis of solid rocket booster XT X-axis of external tank Y out-of-plane velocity Y pitch axis Y precision navigation signal Y Y-axis (horizontal width of vehicle/structure) Y Y-axis rate of change Y yaw Y-T yaw trim Y/R yaw roll YAG yttrium aluminum garnet YE Deputy for Space Navigation Systems YL Y-axis of Spacelab YO Y-axis of orbiter YP Y-axis of payload YP yield point YS Y-axis of solid rocket booster YS yield strength YSC yearly spares cost YT station identification symbol YT Y-axis of external tank Z impedance Z normal acceleration (load factor) Z spectral band pair ratio Z yaw axis Z Z-axis direction Z Z-axis rate of change Z Zulu (Greenwich mean time) ZCG impedance cardiogram ZEM zero effort miss ZGT zero-gravity trainer ZI zone of interior (continental USA) ZIP zodiacal infrared probe ZL Z-axis of Spacelab ZLV Z-axis, local vertical (payload bay toward Earth) ZO Z-axis of orbiter ZOE zone of exclusion ZOT rocket engine inner-manifold explosion ZP Z-axis of payload ZPN impedance pneumogram ZS Z-axis of solid rocket booster ZSI Z solar inertial (payload bay facing away from sun) ZT Z-axis of external tank Zhy Z-hybrid ac alternating current autoland automatic landing bpi bits per inch bpm beats per minute bps bits per second brpm breath rate per minute c.g. center of gravity c/s counts per second capcom capsule communicator cfm cubic feet per minute comcon command console commfault communication fault comnet communications network comsec communications security cpm cycles per minute cps cycles per second dB decibel dBW decibel-watt (reference) dBm decibel-milliwatt (reference) dc direct current eV electron volt fpm feet per minute fps feet per second fps frames per second ft/sec feet per second g gravity gph gallons per hour gpm gallons per minute gps gallons per second ips inches per second k kilo- (thousand) kHz kilohertz kV kilovolt kVA kilovolt-ampere kW kilowatt kWh kilowatt-hour kb kilobit kbps kilobits per second kbs kilobits per second keV kiloelectron volt kg kilogram kgal/min kilogallons per minute klb thousands of pounds (kilopounds) km kilometer km/hr kilometers per hour kops thousands of operations per second kpps kilopulses per second kps kilometers per second krem kilorem ks/s kilosymbols per second loran long-range navigation lpW lumens per watt lpm lines per minute lps liters per second m-kg meter-kilogram mA milliampere mV millivolt mW milliwatt mbar millibar mbps millibits per second mg milligram mm millimeter mmHg millimeters of mercury mmW millimeter wave modem modulator/demodulator mph miles per hour ms millisecond msec millisecond n neutron nm nanometer nmi nautical mile ns nanosecond pH hydrogen-ion concentration (alkalinity) pixel picture element ppb parts per billion pph pounds per hour ppm parts per million ppm parts per minute ppm pulses per minute pps pulses per second psf pounds per square foot psi pounds per square inch psia pounds per square inch absolute psid pounds per square inch differential psig pounds per square inch gauge psis pounds per square inch scaled q dynamic pressure rms radian means per second rph revolutions per hour rpm revolutions per minute rpm rotations per minute rps revolutions per second s/s samples per second s/s symbols per second scc standard cubic centimeter scch standard cubic centimeters per hour sccm standard cubic centimeters per minute sccs standard cubic centimeters per second scf standard cubic feet scfh standard cubic feet per hour scfm standard cubic feet per minute scfs standard cubic feet per second scim standard cubic inches per minute scis standard cubic inches per second sm statute mile sps samples per second sr steradian w/m words per minute wpm words per minute wps words per second

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