Space Science Acronyms

AA Auroral radio Absorption AACGM Altitude Adjusted Corrected GeoMagnetic ABI Auroral Boundary Index ACCENT Atmospheric Chemistry of Combustion Emissions Near the Tropopause ACE Advanced Composition Explorer ACF Auto Correlation Functions ACR Anomalous Cosmic Rays ADCS Attitude Determination and Control Subsystem ADEOS ADvanced Earth Observation Satellite (Japan) ADEP ARTIST Data Editing and Printing ADMS Atmospheric Density Mass Spectrometer AE Atmosphere Explorer AE Auroral Electrojet index AEPI Atmospheric Emissions Photometric Imager AES Auger Electron Spectroscopy AEU Antenna Element Unit AFB Air Force Base AFGL Air Force Geophysical Laboratory AFIT Air Force Institute of Technology AFOSR Air Force Office of Scientific Research AFRL Air Force Research Lab AFSCN Air Force Satellite Control Network AFSPC Air Force SPace Command AFWA Air Force Weather Agency AGILE Astrorivelatore Gamma a Immagini Leggero AGU American Geophysical Union AGW Atmospheric Gravity Waves AI Asymmetry Index AIDA Arecibo Initiative in Dynamics of the Atmosphere AIM Aeronomy of Ices in the Mesosphere AKR Auroral Kilometric Radiation AL Auroral Electrojet Lower Limit Index ALF Absorption Limiting Frequency ALIS Airglow Limb Imaging System ALOMAR Arctic Lidar Observatory for Middle Atmospheric Research ALOS Advanced Land Observing Satellite ALSP Apollo Lunar Surface Probe ALTAIR ARPA Long-Range Tracking and Identification Radar AMBER African Meridian B-field Educational Research Array AMCSR Advanced Modular Coherent Scatter Radar AMI Aeronomic Models of the Ionosphere AMIE Assimilative Mapping of Ionospheric Electrodynamics AMISR Advanced Modular Incoherent Scatter Radar AMOS Air Force Maui Optical Station AMPERE Active Magnetospheric and Planetary Electrodynamics Response Experiment AMPTE Active Magnetospheric Particle Tracer Explorer AMS American Meteorological Society ANDE Atmospheric Neutral Density Experiment ANL Argonne National Laboratory AO Arecibo Observatory AO Announcement of Opportunity AO Annual Oscillation APL Applied Physics Laboratory ARCLITE ARCtic LIdar TEchnology ARCS Atmospheric Responses to a Changing Sun ARCUS Arctic Research Consortium of the US ARGOS Advanced Research and Global Observation Satellite ARIA Atmospheric Response in Aurora ARPA Advanced Research Project Agency ARTEMIS Advanced Relay and TEchnology MIssion Satellite (ESA) ASC All-Sky Camera ASDI All-Sky Doppler Interferometer ASI All-Sky Imager ASIP All-Sky Imaging Photometer ASPERA-4 Analyzer of Space Plasmas and Energetic Atoms ASPOC Active Space Craft POtential Control ASTER Advanced Space borne Thermal Emission and Reflection Radiometer ASTRA Atmospheric & Space Technology Research Associates ATM ATMospheric Sciences Division (NSF) ATS Advanced Technology Satellite ATST Advanced Technology Solar Telescope ATV All-sky TeleVision camera AU Auroral Electrojet Upper Limit Index AUSAC Arecibo Users and Scientific Advisory Committee AVHRR Advanced Very High Resolution Radiometer AVPST Analysis of Variability of Precipitation and Surface Temperatures AWG American Wire Gauge AZIS AriZona Imaging Spectrograph BAG Bishop's Acronym Guide BAS British Antarctic Survey BATSE Burst And Transient Source Experiment BATS-R-US Block-Adaptive-Tree-Solarwind-Roe- Upwind-Scheme BBELF BroadBand Extremely Low Frequency BBE BroadBand Electrons BBF Bursty Bulk Flows BER Bit Error Rate BIMS Bennett Ion Mass Spectrometer BL Boundary Layer BLO Bear Lake Observatory BLPCOC Boundary Layer Physics by COordinated CLUSTER Observations BNSC British National Space Agency BPS Boundary Plasma Sheet C/A Coarse Acquisition C&DH Command and Data Handling CADITS Coupling And Dynamics of the Ionosphere-Thermosphere System CAM Community Atmospheric Model CAMI Civil Aerospace Medical Institute CAMMICE Charge And Mass Magnetospheric Ion Composition Experiment CANOPUS Canadian Auroral Network for the OPEN Program Unified Study CAPE Convective Available Potential Energy CAPE Chronograph Aerosol Photogrammetic Experiment CAPER Cleft Accelerated Plasma Experimental Rocket CAPS CAssini Plasma Spectrometer CASES Connected Autonomous Space Environment Sensors CASI Canadian Aeronautics and Space Institute CASPER Center for Astrophysics, Space Physics and Engineering Research CAT Coordinated Analysis of the Thermosphere CAWSES Climate And Weather of the Sun- Earth-System CBPLL Common Bandwith Phase Lock Loop CCCO Committee on Climatic Changes and the Ocean CCD Charge Coupled Devices CCE Charge Composition Explorer CCF Cross-Correlation Function CCM Community Climate Model CCMC Community Coordinated Modeling Center CD Current Disruption model CDAAC Cosmic Data Analysis and Archive Centers (at UCAR) CDAW Coordinated Data Analysis Workshop CDC Cusp Diamagnetic Cavity CDD Current Disruption/Dipolarization CDF Common Data Format CDPS Cold Dense Plasma Sheet CDR Critical Design Review CD-ROM Compact Disc-Read Only Memory CEDAR Coupling, Energetics, and Dynamics of Atmospheric Regions CEJ CounterElectroJet CEM Channel Electron Multiplier CEOS Committee on Earth Observation Satellites CEP Cusp Energetic Particles CEPPAD Comprehensive Energetic Particle and Pitch Angle Distribution experiment CERES Clouds and the Earth's Radiant Energy System CERTO Coherent Electromagnetic Radio TOmography CGD Climate and Global Dynamics CGLAT Corrected Geomagnetic LATitude CGRO Compton Gamma Ray Observatory CGS Center for GeoSpace studies CGSM Canadian GeoSpace Monitoring CHAMP CHAllenging Mini-Satellite Payload CHARS Coronal-Hole-Active Region-Current Sheet CHIMES Compact Hyperspectral Imaging Module for Earth Science CIDR Coherent Ionospheric Doppler Receiver CINDI Coupled Ion-Neutral Dynamics Investigation CIR Corotating Interaction Regions CIRA Cooperative Institute for Research in the Atmosphere CIRA COSPAR International Reference Atmosphere CIRES Cooperative Institute for Research in Environmental Sciences CIS Cluster Ion Spectrometry CIS Convective Ionospheric Storms CISL Computational and Information Systems Laboratory CISM Center for Integrated Space Weather Modeling CIT Computerized Ionospheric Tomography CIV Critical Ionization Velocity experiment CL Critical Layer CLAES Cryogenic Limb Array Etalon Spectrometer CMAT Coupled Middle Atmosphere and Thermosphere model CME Coronal Mass Ejection CMI Cyclotron Maser Instability CMIS Conical-scanning Microwave Imager/Sounder CNA Cosmic radio Noise Absorption C/NOFS Communication/Navigation Outage Forecast System COADS U.S. Comprehensive Oceans- Atmospheres Data Set CODA Coupling of Dynamics and Aurora CODIF Composition and Distribution Function CO-I CO-Investigator CONUS CONtiguous United States COPE Cooperative Observations of Polar Electrodynamics COPEX COnjugate Point EXperiment COPP COronal Physical Processes COPUOS UN COmmittee on Peaceful Uses of Outer Space COSMIC Constellation Observing System for Meteorology, Ionosphere, and Climate COSPAR Committee On SPAce Research COTIF CEDAR Optical Tomography Imaging Facility COTS Commercial Off The Shelf CPA Charging Plate Analyzers CPEA Coupling Processes in the Equatorial Atmosphere CPS Central Plasma Sheet CRAND Cosmic Ray Albedo Neutron Decay CRB Convection Reverse Boundary CRCM Comprehensive Ring Current Model CRIS Cosmic Ray Isotope Spectrometer CRPL Central Radio Propagation Laboratory CRRES Chemical Release and Radiation Effects Satellite CRU Climate Research Unit CSA Canadian Space Agency CSD Covariance Spectral Density CSEM Center for Space Environment Modeling CSG CAWSES Streering Groups CSPAR Center for Space Plasma and Aeronomic Research CSSC CEDAR Science Steering Committee CSSG CAWSES Science Steering Groups CSSP Committee on Solar and Space Physics CSTR Committee on Solar-Terrestrial Relations CSW Committee for Space Weather CTECS Compact Total Electron Content Sensor CTIM Coupled Thermosphere Ionosphere Model CTIP Coupled Thermosphere-Ionosphere- Plasmasphere Model CTIP Cubesat Tiny Ionospheric Photometer CTIPe Coupled Thermosphere Ionosphere Plasma electrodynamics CUPRI Cornell University Portable Radar Interferometer CUTLASS Co-operative UK Twin Auroral Sounding System DA Data Assimilation DAAC Distributed Active Archive Center DAMSON Doppler And Multipath SOunding Network DAO Data Assimilation Office (NASA) DARPA Defense Advanced Research Projects Agency DASI Digital All-Sky Imager DASI Distributed Array of Small Instruments DAWEX Darwin Area Wave EXperiment DBS Direct Broadcasting Satellite receivers DCS Differential Cross Section DD Directional Discontinuities DDEF Disturbance Dynamo Electric Field DDRE Director Defense Resource and Engineering DE Dynamics Explorer DE-LANG Dynamics Explorer LANGmuir Probe Instrument DEMETER Detection of ElectroMagnetic Emission Transmitted From Earthquake Regions DEWD Densities and East-West Drifts DF Dipolarization Fronts DIAL DIfferential Absorption Lidar DIDM Digital Ion Drift Meter DISS Digital Ionospheric Sounding System DIT Discrete Inverse Theory DLL Delay Locked Loop DM Drift Meter DMC DiaMagnetic Cavity DMI Danish Meteorological Institute DMSG Defense Meteorological Systems Group DMSP Defense Meteorological Satellite Program DOC DataLynx Operating Center DoD Department of Defense DoE Department of Energy DoI Department of Interior DOP Dilution Of Precision DOY Day Of Year DoT Department of Transportation DPU Data Processing Unit DRA Defense Research Agency (UK) DREAM Dynamic Radiation Environment Assimilation Model DSI Deep Space I probe DSP Digital Signal Processing DSS Decision Support Systems Dst Disturbance Storm Time index DSX Demonstartion Science EXperiment DTM Drag Temperature Model DVD Density Vertical Drift DWP Digital Wave Processor DWSS Defense Weather Satellite System DWTS Doppler Wind and Temperature Sounder DYANA DYnamics Adapted Network for the Atmosphere EADEX Equatorial Atmosphere Dynamics Experiment EAR Equatorial Atmosphere Radar EAW Electron Acoustic Waves EBC Energy Budget Campaign ECH Electron Cyclotron Harmonic ECP Evening Co-rotating Patch ECPC Expanding-Contracting Polar Cap ECR Electron Cyclotron Resonance ECS EDAM Electron Density Assimilative Model EDI Electron Drift Instrument EDP Electron Density Profiles EDR Environmental Data Record EE Eruptive Event EEA Electron Electrostatic Analyzer EED Energetic Electron Detector EEJ Equatorial ElectroJet EFI Equatorial F region Irregularities EFW Electric Fields and Waves EGNOS European Geostationary Navigation Overlay System EGS European Geophysical Society EGY Electronic Geophysical Year eGY Electronic Geophysical Year eHY Electronic Heliospheric Year EIA Equatorial Ionization Anomaly EICS Energetic Ion Composition Spectrometer EIS EUV Imaging Spectrometer EISCAT European Incoherent SCATter Facility EIT Equatorial Ionosphere-Thermosphere System EIT Extreme Infrared Telescope ELF Extreme Low Frequency ELV Expendable Launch Vehicle EMA Equatorial Mass density Anomaly EMAD Equatorial Middle Atmosphere Dynamics EMFI Electric and Magnetic Field Instrument EMIC ElectroMagnetic Ion Cyclotron EMDE Equatorial Magnetic Depression Events EMP ElectroMagnetic Pulse EMPIRE Estimating Model Parameters from Ionosphere Reverse Engineering ENA Energetic Neutral Atom ENSO El-Nino Southern Oscillation EOS Earth Observing System EPB Equatorial Plasma Bubble EPCI Electron Pederson Conductivity Instability EPCO Early Polar Cap Observatory EPIC Equatorial Processes Including Coupling EPM Energetic Particle Meter E/PO Education and Public Outreach EPTA Equatorial Plasma Temperature Anomaly ePY Electonic Polar Year ERBE Earth Radiation Budget Experiment EROS Electronic Radio Occultation Server ERS Earth Remote Sensing Satellite (ESA) ESA European Space Agency ESD ElectroStatic Discharge ESF Equatorial Spread-F ESF European Science Foundation ESM Equipment Support Module ESMF Earth System Modeling Framework EMPIRE Estimating Model Parameters from Ionospheric Reverse Engineering ESOC European Space Operations Center ESP Earth Science Portal ESSA Environmental Science Services Administration E-STAR European- Solar Terrestrial and Atmospheric Research ESTEC European Space Research and TEchnological Center ETA Equatorial Temperature Anomaly ETWA Equatorial Temperature and Wind Anomaly EUMETSAT EUropean Organization for the Exploitation of METeorological SATellites EUV Extreme UltraViolet EUVIP Extreme UltraViolet Imaging Photometer EVA ExtraVehicular Activity FAA Federal Aviation Administration FAC Field Aligned Currents FAI Field Aligned Irregularities FAIM Fully Analytic Ionospheric Model FAST Fast Auroral SnapshoT FBI Farley-Buneman Instability FCMSSR Federal Committee for Meteorological Services and Supporting Research FDTD Finite Difference Time Domain FFS Fast Forward Shock FGM Flux Gate Magnetometer FISM Flare Irradiance Spectral Model FLC Field Line Curvature FLIP Field Line Inter-hemispheric Plasma model FLIRE Field-aligned Link Ionospheric Imaging Radar Experiment FLR Field Line Resonance FLWR Flexible Low power Wideband Receiver FM-CW Frequency Modulated Continuous Wave FOD Foreign Object Detection FokRC Fok Ring Current FOV Field Of View FPI Fabry-Perot Interferometer FPS Fabry-Perot Spectrometer FSW Flight SoftWare FTE Flux Transfer Events FUSE Far Ultraviolet Spectroscopic Explorer FUVI Far UltraViolet Imager GAEM Global Atmospheric Electricity Measurement Program GAIA Ground-to-topside model of the Atmosphere and Ionosphere for Aeronomy GAIM Global Assimilation of Ionospheric Measurements GAIM Global Assimilation of Ionospheric Models GALE Giant Aperture LIDAR Experiment GAPS Global Aspects of Plasma Structures GASP Global Atmospheric Sampling Program GATOM GNSS Air Traffic Operations Model GPJ Gigantic Blue Jets GBM Gamma-ray Burst Monitor GBOA Ground Based Optical Aeronomy GC Guiding Center theory GCM General Circulation Model GCN Ground Communications Network GCP Great Circle Path GCR Galactic Cosmic Radiation (Rays) GEC Global Electrodynamic Connections GECMA Global Electrodynamics and Coupling through the Middle Atmosphere GED Global Electro-Dynamics Mission GEDDS Geospace Environment Data Display System GEM Geospace Environment Modeling Program GEMS Global Environment Monitoring Systems GENI Global Energetic Neutral Index GENESIS Global Environmental and Earth Science Information System GEO GEOsciences Directorate (NSF) GEO GEOsynchronous orbit GEONET GPS Earth Observation NETwork GFDL Geophysical Fluid Dynamics Laboratory GFM Global Field Model GFO GEOSAT Follow On GFS Global Forecast System GGCM Global Geospace Circulation Model GGS Global Geospace Science GHCN Global Historical Climatology Network GI Global Interactions GIC Geomagnetically Induced Currents GIC Geoeffective Ionospheric Currents GIFT Global Ionospheric Forecasting Techniques GILS Government Information Locator Service GIME Global Imaging of Magnetospheric Electrodynamics GIMI Global Imaging Monitor of the Ionosphere GIP Global Ionosphere-Plasmasphere GIRO Global Ionospheric Radio Observatory GISS Goddard Institute for Space Studies GISTM GPS Ionospheric Scintillation and TEC Monitor GIVE Grid Ionospheric Vertical Errors GLAS Geoscience Laser Altimeter System GLE Ground Level Enhancement GM Global Magnetosphere GMC Geosynchronus Mangntopause Crossing GMFK Gauss-Markov Kalman Filter model GML GeoMagnetic Latitude GMT Greenwich Mean Time GNSS Global Navigation Satellite Systems GOES Geostationary Operational Environmental Satellite GOLD Geophysical On-Line Data GONG Global Oscillation Network Group GOX GPS Occultation eXperiment GPRA Government Performance Report Act GPS Global Positioning System GPS/MET Global Positioning System/METeorology GRACE Gravity Recovery And Climate Experiment GRATMAC GRAvity waves and Turbulence in the Middle Atmosphere Cooperation GRI Gravitational Rayleigh-Taylor Instability GRL Geophysical Research Letters GRO Gamma Ray Observatory GSE Ground Support Equipment GSE Geocentric Solar Earth GSFC Goddard Space Flight Center GSFE Geomagnetic Solar Flare Effect GSM Geocentric Solar Magnetic GSTV Global Scale Tidal Variability GSWM Global Scale Wave Model GUVI Global UltraViolet Imager GW Gravity Waves GWIM Global Wave Imager and Mapper HAARP High-frequency Active Auroral Project HAFB Hanscom Air Force Base HAIL Holographic Array for Ionospheric Lidar HALOE HALogen Occultation Experiment HAMMONIA HAMburg MOdel for the Neutral & Ionized Atmosphere HAO High Altitude Observatory HAPI High Altitude Plasma Instrument HASDM High Accuracy Satellite Drag Model HATI Hanson Anemometer for Thermospheric Investigations HCS Heliospheric Current Sheet HD Harang Discontinuity HDPTA High Density Peruvian Tomography Array HENA High Energy Neutral Atom imager HEO Highly Elliptical Orbit HERS High Energy Range Spectrometer HESSI High Energy Solar Spectroscopic Imager HF High Frequency (radar) HGI HelioGraphic Inertial HGR HelioGraphic Rotating HI Heliospheric Imager HIBAR High Bandwidth Auroral Rocket HILAT HIgh LATitude Satellite HILT Heavy Ion Large area proportional counter Telescope HIRAAS HIgh Resolution Airglow and Aurora Spectroscopy experiment HIRDLS HIgh Resolution Dynamics Limb Sounder HIREX HIgh-Resolution X-ray EXplorer HIRISE High Resolution Imaging Spectrograph using an Echelle grating HIRS High-Resolution Infrared Radiation Sounder HITIES HIgh Throughput Imaging Echelle Spectrograph HITS High resolution Ionosphere Thermosphere System HLPS High Latitude Plasma Structures HP Hemispheric Power HPLA High-Power Large Aperture radar HRDI High Resolution Doppler Imager HS High School HSS High Speed Stream HST Hubble Space Telescope HTI Height-Time Intensity HXT Hard X-ray Telescope I3RC Inter-comparison of 3-D Radiation Codes IAGA International Association of Geomagnetism and Aeronomy IAMAS International Association of Meteorology and Atmospheric Sciences IAR Ionospheric Alfven Resonator IAW Inertial Alfven Wave I&T Integration and Testing IBEX Interstellar Boundary EXplorer ICD Interface Control Document ICMA IAMAS Commission for the Middle Atmosphere ICMC International Complete Meridian Chain ICME Interplanetary Coronal Mass Ejection ICMSSR Interdepartmental Committee for Meteorological Services and Supporting Research ICRCCM-2 Inter-Comparison of Radiation Codes for use in Climate Models ICSU International Council of Scientific Unions (International Council for Science) ICSWIAS International Committee for Space Weather Impacts to Aviation Safety IDA3D Ionospheric Data Assimilation 3- Dimensional IDEA Integrated Dynamics through Earth’s Atmosphere IDI Imaging Doppler Interferometer IDL Interactive Data Language IDM Internal Discharge Monitor IDM Ion Drift Meter IDT Instrument Development Team IEC Integrated Electron Content IEC Ionospheric Electron Content IEF Interplanetary Electric Field IF Intermediate Frequency IFI Ionospheric Feedback Instability IFM Ionospheric Forecasting Model IGAC International Global Atmospheric Chemistry Project IGP Ionospheric Grid Point IGPP Institute of Geophysics and Planetary Physics IGRF International Geomagnetic Reference Field IGS International GPS Service IGY International Geophysical Year IH Inner Heliosphere IHS International Heliospheric Study IHY International Heliospheric Year IIP Instrument Incubator Program IISL International Institute of Space Law ILAS Improved Limb Atmospheric Spectrometer ILWS International Living With a Star IMAGE International Monitor for Auroral Geomagnetic Effects IMAGE Imager for Magnetopause-to-Aurora Global Exploration IMF Interplanetary Magnetic Field IMI Inner Magnetosphere Imager IMP Interplanetary Monitoring Platform IMPACT Investigation of Magnetospheric Particles Acceleration and Turbulence IMS International Magnetospheric Study IMS Ion Mass Spectrometer IMS Ionospheric Measuring System IMSAC Inner Magnetosphere/Storms Assessment Challenge IMU Inertial Measurement Units INAG Ionosonde Network Advisory Group INMS Ion Neutral Mass Spectrometer IOC Intergovernmental Oceanographic Commission IONEX IONospher EXperiment IONS Iontercontinental Chemical Transport Experiment Ozonsonde Network Study IOP Intensive Operation Period IOX Ionospheric Occultation EXperiment IPCC Intergovernmental Panel on Climate Change IPEI Ionosphere Plasma Electrodynamic Instrument IPEMAC Investigation of the Ionospheric Plasma Escape and MAgnetosphere Coupling IPHA Indirect Phase Height Analysis IPM Ionosphere Plasmasphere Model IPP Ionospheric Penetration Point IPS InterPlanetary Scintillation IPY International Polar Year IQSY International Quiet Sun Year IR&D Instrument Research & Development IRB Inner Radiation Belt IRI International Reference Ionosphere IRM Ion Release Module IRO Ionospheric Radio Occultation ISAS Institute for Space and Astronautical Science of Japan ISCCP International Satellite Cloud Climatology Project ISCS International Solar Cycle Studies ISEA International Symposium on Equatorial Aeronomy ISEE International Sun Earth Explorer ISES International Space Environment Service ISF International Science Foundation ISGI International Service of Geomagnetic Indices ISIS International Satellite For Ionospheric Study ISIS Intercepted Signals for Ionospheric Science ISO Intra-Seasonal Oscillation ISP Ionosphere Storm Probes ISR Incoherent Scatter Radar ISRO Indian Space Research Organization ISS International Space Station ISTP International Solar-Terrestrial Physics ISU International Space University ISUAL Imager of Sprites and Upper Atmospheric Lightning ISV Intra-Seasonal Variations ISY International Space Year IT Ion Trap IT Information Technology I-T Ionosphere Thermosphere ITCZ Inter-Tropical Convergence Zone ITI Information Technology Infrastructure ITM Ionosphere Thermosphere Magnetosphere ITSP Ionosphere Thermosphere Storm Probes IUCAF Inter-Union Commission on the Allocation of Frequencies for Radio Astronomy and Space Science IUE International Ultraviolet Explorer IUGG International Union of Geodesy and Geophysics IUPAP International Union on Pure and Applied Physics IV&V Integration Vibration and Vacuum IVI Ion Velocity Instrument IVM Ion Velocity Meter IZMIRAN Institute of Terrestrial, Magnetism, Ionosphere, and Radiowave Propagation of the Russian Academy of Sciences JAG Joint Association of Geophysics JASTP Journal of Atmospheric and Solar- Terrestrial Physics JATP Journal of Atmosphere and Terrestrial Physics JAXA Japan Aerospace Exploration Agency JEM-EF Japanese Experiment Module- Exposed Facility JGR Journal of Geophysical Research JIM Jovian Ionospheric Model JISAO Joint Institute for the Study of Atmosphere and Ocean JMA Japan Meteorological Agency JPDO Joint Planning and Development Office JPL Jet Propulsion Laboratory JRO Jicamarca Radar Observatory JSC Johnson Space Center KAFB Kirtland Air Force Base KDI Knowledge and Distributed Intelligence KFPLL Kalman Filter Phase Lock Loop KH Kelvin-Helmholtz instability or waves KHI Kelvin-Helmholtz Instability KRM Kamide-Richmond-Matsushita Method KSC Kennedy Space Center LADEE Lunar Atmospheric and Dust Environment Explorer LANL Los Alamos National Laboratory LASA Los Alamos Sferic Array LASCO Large Aperture Solar Coronal Observatory LASCO Large Angle and Spectrometric Coronograph LASP Laboratory for Atmospheric and Space Physics LBC Lower-Band Chorus LBH Lyman-Birge-Hopfield Bands LBHL LBH Long LBHS LBH Short LCP Long Coded Pulse LCROSS Lunar Crater Observation and Sensing Satellite LDAR Lightning Detection And Ranging System LDE Long Duration Events LDEF Long Duration Exposure Facility LEMMS Low-Energy Magnetospheric Measurement System LENA Low Energy Neutral Atom imager LEO Low Earth Orbit LEP Lightning Electron Precipitation LEPA Low Energy Plasma Analyzer LET Linear Energy Transfer rate LF Low Frequency LFM Lyon-Fedder-Mobarry model LHR Lower Hybrid Resonance LICA Low-energy Ion Composition Analyzer LIDAR LIght Detection And Ranging LIE Lightning-induced Ionization Enhancement LISN Low-latitude Ionospheric Sensor Network LLBL Low Latitude Boundary Layer LMD Linear Magnetic Decrease LNA Low Noise Amplifier LoFAR Low Frequency ARray LOI Letters Of Intent LORAAS LOw Resolution Airglow and Aurora Spectrograph LOS Line-Of-Sight LPU Least Publishable Unit LRO Lunar Reconnaissance Orbiter LRPC Long-Range Planning Committee LRR Launch Readiness Review LSA Limited Space-charge Accumulation LST Local Solar Time LSTID Large-Scale Traveling Ionospheric Disturbances LT Local Time LTCS Lower Thermosphere Coupling Studies LTT Latitude-Time-TEC LUF Lowest Usable Frequency LV Launch Vehicle LWPC Long Wave Propagation Capability LWS Living With a Star LWS TR&T Living With a Star Targeted Research & Technology MAC Middle Atmosphere Cooperation MACCM3 Middle Atmosphere CCM MACCS Magnetometer Array for Cusp and Cleft Studies MACEP Mapping of AMIE Convection Electric Potentials MAGCON MAGnetosphere CONstellation MagEIS Magnetic Electron Ion Spectrometer MAGIC Magnetometer Array on the Greenland Ice Cap MAGPIES MAGnetospheric Plasma Imaging Explorer Satellites MALT Mesosphere And Lower Thermosphere MAP Middle Atmosphere Program MARSIS Mars Advanced Radar for Subsurface and Ionosphere Sounding MAST Mass Spectrometer Telescope MAT Marine Atmospheric Temperature MATC Middle Atmosphere and Tropospheric Climate MC Magnetic Cloud MCAL MiniCALorimeter MCC Mission Control Center MCD Magnetotail Constellation Draco MCISTP Magnetotail Campaign Collaborating with International Solar-Terrestrial Physics Missions McMAC Mid-continent MAgnetoseismic Chain MCP Micro Channel Plate MCRA Minor Constituent Reference Atmosphere MCS Mesoscale Convective System MD Magnetic Decrease MDI Michelson Doppler Imager MDM Midnight Density Maximum MEASURE Magnetometers along the Eastern Atlantic Seaboard for Undergraduate Research and Education MEDAC Meteor Echo Detection And Collection MENA Medium Energy Neutral Atom Imager MEO Medium Earth Orbit MESA Minaturized ElectroStatic Analyzer MET Marshall Engineering Thermosphere MF Medium Frequency (radar) MFSM Magnetospheric Forecast and Specification Model MHD MagnetoHydroDynamics MIC Mission Initiation Conference MIC Magnetosphere Ionosphere Coupling MICAS Miniature Integrated Camera Spectrometer MICET Magnetosphere Ionosphere Coupling Electrodynamics and Transport MICPAD Magnetosphere-Ionosphere Coupling and Polar Auroral Dynamics MICS Magnetosphere Ionosphere Coupling Satellite MIDAS Multi Instrument Data Analysis Software MIDEX Medium Class EXplorer MIDP Mars Instrument Development Program MIE Magnetic Impulse Event MIES Mini Imaging Electron Spectrometer MIL Mesosphere Inversion Layer MIME Multipurpose Internet Mail Extensions MIP Model Intercomparison Projects MIRACLE Magnetometers-Ionospheric Radars-All- Sky Cameras Large Experiment MISA Millstone Ionospheric Steerable Antenna MISETA Multi-Instrument Studies of Equatorial Thermospheric Aeronomy MISR Multi-angle Imaging SpectroRadiometer MIST Magnetosphere Ionosphere and Solar Terrestrial MITM Mesosphere Ionosphere Thermosphere Magnetosphere MIT Midlatitude Ionospheric Trough MLAT Magnetic LATitude MLD Mid Latitude Disturbances MLON Magnetic LONgitude MLS Microwave Limb Sounder MLT Magnetic Local Time MLT Mesosphere and Lower Thermosphere MLTCS Mesosphere Lower-Thermosphere Coupling Study MM Mirror Mode MME Man-Made Events MMS Magnetosphere MultiScale MOC Mission Operation Center MODA Magneto Optic Doppler Analyzer MODIS MODerate-resolution Imaging Spectroradiometer MODOR MODule foR Dynamic Outflow Response MOMLA Modeling Of Possible Solar Variability Effects in the Middle and Lower Atmosphere MOPITT Measurements Of Pollution In The Troposphere MOPS Minimum Operational Performance Standard MOU Memorandum Of Understanding MP MagnetoPause MPA Magnetospheric Plasma Analyzer MPAE Max-Planck Institute for Aeronomy MPI Max-Planck Institute MPI Method Passing Interface MPL MicroPulse Lidar MR Magnetospherically Reflected MRF Mobile Research Facility MRI Mid-Range Infrastructure NSF award MRR Mission Readiness Review MSFC Marshall Space Flight Center MSAS MTSAT Satellite-based Augmentation System MSIS Mass Spectrometer and Incoherent Scatter Model MSM Magnetospheric Specification Model MSNA Milatitude Summer Nighttime Anomaly MSP Meridian Scanning Photometer MSS Multi Spectral Scanner MSTID Medium-Scale Traveling Ionospheric Disturbances MSU Microwave Sounding Unit MSX Midcourse Space Experiment MTA Midnight Temperature Anomaly MTM Mesospheric Temperature Mapper MTM Midnight Temperature Maximum MTSAT Multifunctional Transport SATellite MUF Maximum Usable Frequency MURI Multi-disciplinary University Research Initiative MUSE Minature Ultraviolet Spectrograph Experiment MVAB Minimum Variance Analysis of the B field MWA Mega-Watt Acre N/A Not Applicable NACE Neutral Atmosphere Composition Experiment NACS Neutral Atmosphere Composition Spectrometer NAIC National Astronomy and Ionosphere Center NAS National Academy of Sciences NASA National Aeronautics and Space Administration NASCAP NASA Charging and Analysis Program NASDA NAtional Space Development Agency (Japan) NATE Neutral Atmospheric Temperature Experiment NCAR National Center for Atmospheric Research NCDC National Climate Data Center NCEP National Center for Environmental Prediction NCEP NOAA CodE for Precipitation NDA Nightside Detached Aurora NDSC Network for the Detection of Stratospheric Change NEAR Near Earth Asteroid Rendezvous spacecraft NEAT Near Earth Asteroid Tracking NENL Near-Earth Neutral Line model NESDIS National Environmental Satellite, Data, and Information Services NETR Near-Earth Transition Region NGATS Next Generation Air Transportation System NGDC National Geophysical Data Center NGS National Geodetic Survey NHB NASA HandBook NEIALs Naturally Enhanced Ion-Acoustic Lines NIPR National Institute for Polar Research NIRA Nonlinear Ionospheric Removal Algorithm NLC NoctiLucent Clouds NLDN National Lightning Detection Network NLFFF NonLinear Force-Free Field NN Neural Network NNSS Navy Navigational Satellite System NOAA National Oceanic and Atmospheric Administration NPA Neutral Particle Aurora NPA Non-Precision Approach NPOESS National Polar Orbiting Environmental Satellite System NPP NPOESS Preparatory Project NRA NASA Research Announcement NRC National Research Council NRF Non-Radial Flow NRL Naval Research Laboratory NRO NASA Research Opportunity NRO National Reconnaissance Office NSB National Science Board NSF National Science Foundation NSIPP NASA Seasonal-to-International Prediction Process NSPO National Space Program Office NSROC NASA Sounding Rocket Operations Contract NSRP NASA Sounding Rocket Program NSS New Skies Satellites NSSA National Security Space Architect NSSDC National Space Science Data Center NSSTC National Space Science and Technology Center NSTC National Science and Technology Center NSWP National Space Weather Program NSWPASG National Space Weather Program Assessment Study Group NSWPC National Space Weather Program Council NTC NonThermal Continuum NuDe Nuclear Detection NVO National Virtual Observatory NWM Neutral Wind Meter NWRA NorthWest Research Associates NWS National Weather Service OBC On-Board Computer OCB Open-Close Boundary OFCM Office of the Federal Coordinator for Meteorological Services and Supporting Research OGO Orbiting Geophysical Observatory OLD Optical Lightning Detector OLS Operational Linescan System OMS Orbital Maneuvering System ONR Office of Naval Research OPAL Optical Profiling of the Atmospheric Limb OPO Operational Parametric Oscillators OPP Office of Polar Programs OpSEND Operational Space Environment Network Display O/OREOS Organism/Organic Exposure to Orbital Stresses OpenGGCM Open Geospace General Circulation Model ORBITALS Outer Radiation Belt Injection, Transport Acceleration and Loss Satellite OSEC Over-the-Satellite Electron Content OSI Operational Significant Imagery OSIRIS Optical Spectrograph and Infra-Red Imaging System OSS Office of Space Sciences OSTP Office of Science and Technology Policy OTA Office of Technology Assessment OTH Over-The-Horizon OWF Optimum Working Frequency PACE Polar Anglo-American Conjugate Experiment PAD Pitch Angle Distribution PADIE Pitch Angle and Diffusion of Ions and Electrons PAPCO PAnel Plot COmposer PARS Polar Aeronomy and Radio Science summer school PBI Poleward Boundary Intensification PBL Plasma Boundary Layer PBL Proton Boundary Layer PCA Polar Cap Absorption PCA Photon Counting Array PCB Polar Cap Boundary PCH Polar Coronal Holes PCMDI Program for Climate Model Diagnosis and Intercomparison PCO Polar Cap Observatory PCU Panel Control Unit PDF Probability Distribution Function PEACE Plasma Electron And Current Experiment PEFE Plasma Enhanced Field Emission PEM Pacific Exploratory Mission PEO Polar Earth Orbit PET Proton/Electron Telescope PFISR Poker Flat ISR (silent P) PFP Plasma Frequency Probe PHAZE Physics of the Auroral Zone Electrons PI Principal Investigator PIA Precursor Ionization Anomaly PIC Project Initiation Conference PIC Particle-In-Cell code PIDP Planetary Instrument Development Program PIF Pulsed Ionospheric Flow PIM Parameterized Ionospheric Model PIP Plasma Impedance Probe PIPER Photometric Imager of Precipitated Electron Radiation PIU Payload Integration Unit PJ Polarization Jet PL PayLoad PLASLIFE PLASma LIFEtime computer simulation PLISD Pulse Laser Induced Sputtering Deposition PLL Phase Locked Loop PLP Planar Langmuir Probe PM Program Manager PMAF Poleward-Moving Auroral Form PMC Polar Mesospheric Clouds PMPCE Poleward Moving Plasma Concentration Enhancements PMRAF Poleward Moving Radar Aurora Forms PMSE Polar Mesosphere Summer Echoes PMT PhotoMultiplier Tube PNT Positioning, Navigation, and Timing POAM Polar Ozone and Aerosol Measurement POC Point of Contact POD Precise Orbit Determination POES Polar Operational Environmental Satellite POLAN POLynomial ANalysis method POLITE Plasmaspheric Observations of Light Ions in the Topside and Exosphere PolSAR Polarimetric Synthetic Aperture Radar PP PlasmaPause PPEF Prompt Penetration Electric Fields PPP Precise Point Positioning PRE Pre-Reversal Enhancement PREASA Pacific Region Equatorial Anomaly Studies in Asia PRF Pulse Repetition Frequency PRIMO Problems Related to Ionospheric Models and Observations PSBL Plasma Sheet Boundary Layer PSC Polar Stratospheric Clouds PSD Phase Space Density PSD Power Spectral Density PSL Phase-Space Lagrangian methods PSMOS Planetary Scale Mesopause Observing System PSO Planetary Scale Oscillation PSS Planetary and Space Sciences PVWave Precision Visual Wave PW Planetary Wave PWI Plasma Wave Instrument QBO Quasi-Biennial Oscillation QLT QuasiLinear Theory QP Quasi-Periodic RAC Radiation Auroral Clutter RadScint Radar Scintillation RAO Relocatable Atmospheric Observatory RAIDS Remote Atmospheric and Ionospheric Detection System RAM Ring current Atmosphere interaction Model RAPID Research with Adaptive Particle Imaging Detectors RB Radiation Belt RBR Radiation Belt Remediation RBSP Radiation Belt Storm Probes RC Ring Current RCM Rice Convection Model RCM-E Rice Convection Model-Equilibrium RDR Raw Data Record RDT&E Research, Development, Test, and Evaluation REASoN Research, Education, and Applications Solution Network REFIMS Rotating Electric Field Ion Mass Spectrometer REPTILE Relativistic Electron and Proton Telescope Integrated Little Experiment RF Radio Frequency RF Radiative Forcing RFI Request For Information RFI Radio Frequency Interference RHESSI Ramaty High Energy Solar Spectroscopic Imager Ri Richardson number RIBG Reilley, ICED, Bent, Gallagher ionospheric model RIDGE Radar Integrated Display with Geospatial Elements RIF Radio Induced Fluorescence RIMS Retarding Ion Mass Spectrometer RISE Radiative Inputs from Sun to Earth RISO Air Force Rocket Impacts on Stratospheric Ozone RIU Remote Interface Unit RMSE Root Mean Square Error ROCSAT Republic Of China SATellite ROPA Rocket Observations of Pulsating Aurora ROSE ROcket and Scatter Experiments ROSES Research Opportunities in Space and Earth Science ROSS Research Opportunity in Space Science RPA Retarding Potential Analyzer RPC Rapid Prototyping Center RPI Radio Plasma Imager RPWS Radio and Plasma Wave Science RRBM Rice Radiation Belt Model RSA Russian Space Agency RSC RDT&E Support Complex RSLWG Research Support and Logistics Working Group RSMA Remote Sensing of the Middle Atmosphere RSTN Radio Solar Telescope Network RTG Radioisotope Thermal Generator RTI Rayleigh Taylor Instability RTI Range Time Intensity RV Retarding Voltage RWS Ram Wind Sensor S3 Small Scientific Satellite S/A Solar Array SAA South Atlantic Anomaly SABER Sounding of the Atmosphere using Broadband Emission Radiometry SAFISY Space Agency Forum on International Space Year SAGA South Atlantic Geomagnetic Anomaly SAI Spin-scan Aurora Imager SAIC Science Applications International Corporation SAID Sub-Auroral Ionospheric Disturbances SAID Sub-Auroral Ion Drift SAL Sudden Atom Layer SAMBA South American B-Field Array SAMBO Simultaneous Auroral Multi-Balloons Observations SAMNET Sub-Auroral Magnetometer NETwork SAMPEX Solar Anomalous and Magnetospheric Particle EXplorer SANDI Small Airglow Neutral Doppler Interferometer SAO Southern Atlantic Oscillation SAPS Sub-Auroral Polarization Streams SAPSWS SAPS Wave Structure SAR arc Stable Auroral Red arc SAR Synthetic Aperture Radar SARAS Substorm Associated Radar Auroral Surge SATCOM SATellite COMmunications SATECP Southern African Total Electron Content Prediction SATI Spectral Airglow Temperature Imager SatScint Satellite Scintillation SAVNET South America VLF NETwork SAW Shear Alfven Wave SBAS Satellite-Based Augmentation System SBR Space-Based Radar SBUV Solar Backscatter UltraViolet instrument S/C SpaceCraft SC Sudden Commencement SCAR Scientific Committee on Antarctic Research SCATHA Spacecraft Charging AT High Altitudes SCC Super-Cloud Cluster SCE Substorm Chorus Event SCEX Space Craft Charging Experiments SCHA Spherical Cap Harmonic Analysis SCIFER Sounding of the Cleft Ion Fountain Energization Region SCINDA SCINtillation Detection Algorithm SCINDA SCIntillation Network Decision Aid SCINTMON SCINTillation MONitor SCORE Self-Calibration Of Range Errors SCORPION SCORE for Plasmasphere and IONosphere SCOSTEP Scientific Committee On Solar- TErrestrial Physics SCW Substorm Current Wedge SDO Solar Dynamics Observatory SDR Sensor Data Record SDS Slow-Drift Shadow event SEA Suprathermal Electron Analyzer SEB Single Event Burnout SEC Sun-Earth Connection SEC Space Environment Center SEC Space Environment Corporation SECAS Sun-Earth Connection's Advisory Subcommittee SECS Spherical Elementary Current Systems SED Storm-Enhanced Density SEE Solar EUV Experiment SEE Single Event Effects SEEFS SSA Environmental Effects Fusion System SEEP Stimulated Emission of Energetic Particles (satellite) SEFI Single Event Functional Interrupt SEG Single Event Glitch SEGR Single Event Gate Rupture SEL Single Event Latchup SEL Space Environment Laboratory SEM Scanning Electron Microscope SEM Space Environment Monitor SEP Solar Electric Propulsion SEP Solar Energetic Particle SES Sun-Earth-System SESAME Satellites Experiments Simultaneous with Antarctic MEasurements SESC Space Environment Service Center SESCAT Sporadic-E SCATter experiment SESS Space Environmental Sensor Suite SESSANE Scintillation and Energy input for Space Situational Awareness and Monitoring of the Environment SETI Search For Extraterrestrial Intelligence SEU Single Event Upsets SFD Sudden Frequency Deviation SFPS Spacecraft Functional Performance Specification SFU Solar Flux Unit SGD Solar Geophysical Data SHARE Southern Hemisphere Auroral Radar Experiment SHE Single Hard Error SHF Super High Frequency SHIMMER Spatial Hetrodyne IMager for Mesospheric Radicals SHINE Solar Heliosphere and INterplanetary Environment program SHS Spatial Hetrodyne Spectroscopy SI Spacecraft Interface SI Sudden Impulses SID Sudden Ionospheric Disturbance SIMD Single Instruction/Multiple Data SIPS Scanning Imaging Photometer System SIS Solar Isotope Spectrometer SITEC Sudden Increase of Total Electron Content SLP Sweeping Langmuir Probe SLS Structure of the Lower Stratosphere SKR Saturn Kilometric Radiation SMC Steady Magnetospheric Convection SMEI Solar Mass Ejection Imager SMEX SMall Explorer SMI Simultaneous Multispectral Imager SMS Suprathermal Ion Mass Spectrometer SMY Solar Maximum Year SNOE Student Nitric Oxide Explorer SOC Science Operations Center SOFIA Stratospheric Observatory For Infra-red Astronomy SOHO SOlar and Heliospheric Observatory SOLIS Synoptic Optical Long-term Investigation of the Sun SOLTIP SOLar Connection with Transient Interplanetary Phenomenon SOON SOlar Optical Network SOPA Synchronous Orbit Particle Analyzer SOPAC Scripps Orbit and Permanent Array Center SOR Starfire Optical Range SoRBE Solar Radio Burst Effects SOT Solar Optical Telescope SOW Statement Of Work SP Solar energetic Particles SPA Space Physics and Aeronomy SPA Sudden Phase Anomaly SpaceWOC Space Weather Operations Center SPAD Single Photon Avalanche Diodes SPARC SPace and Aeronomy Research Center SPARC Space Physics and Aeronomy Research Collaboratory SPARC Stratospheric Processes And their Role in Climate SPDS Space Physics Data System SPE Solar Particle Event SPECIAL Space Processes and Electrical Changes Influencing Atmospheric Layers SPIDR Space Physics Interactive Data Resource SPOT-3(4) Satellite Pour l'Observation de la Terre SPS Standard Positioning Service SPyCAT Space Physics CATalog SPW4 Stationary Planetary Wave 4 SRAG Space Radiation Analysis Group SRAM Static Random Access Memory S-RAMP STEP-Results, Applications, and Modeling Phase SR&T Supporting Research and Technology SRI Stanford Research Institute International SRS Spectral Resonance Structure SSA Space Situational Awareness SSAT Space Science, Applications, and Technology Lab (at UTD) SSB Solar Sector Boundaries SSB/X-M Special Sensor Gamma/X-ray Meter SSC Sudden Storm Commencement SScAC Space Science Advisory Committee SSG Science Steering Group SSI Space Science Institute SSI Spectral Statistical Interpolation SSIES Special Sensor Ionospheric and Electron Scintillation Meter SSIES-3 Space Science Ion and Electron Sensor SSM/I Special Sensor Microwave/Imager SSM/T Special Sensor Microwave/Temperature Sounder SSPM Satellite Surface Potential Monitor SSN SunSpot Number SSR Space Science Reviews SST Sea Surface Temperature SST Solid State Telescope STEC Slant Total Electron Content SSU Stratospheric Sounding Unit SSULI Special Sensor UV Limb Imager SSUSI Special Sensor Ultraviolet Spectrographic Imager SSW StratoSpheric Warming event STAFF Spatio-Temporal Analysis of Field Functuations STAR Spatial Triaxial Accelerometer for Research STARE Scandinavian Twin Auroral Radar Experiment STDN Space Tracking and Data Network STEADE Storm Time Energy And Dynamics Explorer STEERB Storm-Time Evolution of Electron Radiation Belt STEL Solar-Terrestrial Environment Laboratory STEM Solar Terrestrial Environment Model STEM Science, Technology, Engineering, Mathematics (NASA) STEP Solar Terrestrial Energy Program STEREO Solar TErrestrial RElations Observatory STG Spectral Tide-Gauge STIS Space Telescope Imaging Spectrograph STIINTE Solar-Terrestrial Interactions: INstruments and TEchniques STK Satellite Tool Kit STP Satellite Test Program STP Solar-Terrestrial Physics STP Space Test Program STRVs Space Technology Research Vehicles STS Solar Terrestrial Science STW Swallow-Tailed Whistler SuperDARN Super Dual Auroral Radar Network SUPIM Sheffield University Plasmasphere Ionosphere Model SV Space Vehicle SVETSB Solar Variability Effects on Technological Systems and the Biosphere SW Solar Wind SWAS Sub-millimeter Wave Astronomy Satellite SWATS Small Wind And Temperature Spectrometer SWF Short Wave Fadeout SWG Science Working Group SWMF Space Weather Modeling Framework SWMF/GM SWMF/Global Magnetosphere SWMF/IE SWMF/Ionospheric Electrodynamics SWMF/IM SWMF/Inner Magnetosphere SWOC Space Weather Operations Center SWR Sweeping Frequency Receiver SwRI Southwest Research Institute SWS Space Weather Squadron SXI Solar X-ray Imager SXP Solar X-ray Photometer SZA Solar Zenith Angle TACC Taiwan Analysis Center for COSMIC TAD Traveling Atmospheric Disturbance TADS Throw Away DetectorS TAWRS Temperature And Wind Rocket Spectrometer TBB Tri-Band Beacon TBD To Be Determined TBR To Be Resolved TBS To Be Supplied TCR Traveling Compression Region TCS Thin Current Sheet TCV Traveling Convection Vortex TD Tangential Discontinuity TDC Top Dead Center TDIM Time Dependent Ionospheric Model TDRSS Tracking and Data Relay Satellite System TEC Total Electron Content TECU Total Electron Content Unit TEP TransEquatorial Propagation TEX Telescope of EXtreme ultraviolet TGF Terrestrial Gamma-Ray Flashes THEMIS Time History of Events and Macroscale Interactions during Substorms TIA Transverse Ion Acceleration TID Traveling Ionospheric Disturbances TID Total Ionizing Dose TIDI TImed Doppler Interferometer TIEGCM Thermosphere/Ionosphere/ Electrodynamic General Circulation Model TIGER Thermospheric/Ionospheric Geospheric Research symposium TIL Tidal Ion Layers TIM Thermosphere-Ionosphere-Mesosphere TIMAS Toroidal Imaging Mass-Angle Spectrograph TIME-CCM Thermosphere/Ionosphere/ Mesosphere/Electrodynamics Community Climate Model TIMED Thermosphere Ionosphere Mesosphere Energetics & Dynamics TIME-GCM Thermosphere/Ionosphere/ Mesosphere/Electrodynamics General Circulation Model TING Thermosphere Ionosphere Nested Grid model TIP Tiny Ionospheric Photometer TLA Three Letter Acronym TLE Transient Luminous Events TLR magnetoTail Lobe magnetic Reconnection TLS Tethered Lifting System TM TeleMetry TMA TriMethyl Aluminum TMAH Tetra Methyl Aluminum Hydroxide TOF Time-Of-Flight TOI Tongue Of Ionization TOMS Total Ozone Mass Spectrometer TOMEX Turbulent Oxygen Mixing EXperiment TPS The Planetary Society TQMS Triple Quadrupole Mass Spectrometer TRACE Transition Region And Coronal Explorer TRAMP Transitional and Rarefied Axisymmetric Monte Carlo Simulation Process TR&T Targeted Research & Technology TriG Tri GNSS (GPS+Galileo+GLONASS) TRMM Tropical Rainfall Measuring Mission TROZ Tropospheric Ozone Campaign TS Termination Shock TSE Topside Spread Echoes TSI Total Solar Irradiance TSS Targeted Search System TSS Tethered Satellite System TT&C Telemetry, Tracking, and Command TURBO TURBulent upwellings Over Arecibo observatory TW Tidal Wave TWP-ICE Tropical Western Pacific- International Cloud Experiment UA Upper Atmosphere UARS Upper Atmospheric Research Section (NSF) UARS Upper Atmosphere Research Satellite (NASA) UART Universal Asynchronous Receiver Transmitter UBC Upper-Band Chorus UCAR University Corporation for Atmospheric Research UCLA University of California, Los Angeles UCWE Upward Coupling of Wave Energy UDP Universal Data Packets UHF Ultra-High Frequency UHV Ultra-High Vacuum ULDB Ultra Long Duration Balloon ULF Ultra Low Frequency UN United Nations UNB-IMT University of New Brunswick Ionospheric Mapping Technique UNBSSI United Nations Basic Space Science Initiative UNEP United Nations Environment Programme UNESCO United Nations Educational, Scientific, and Cultural Organization UPOS University Partnering for Operational Support URSI Union Radio-Scientifique Internationale or International Union of Radio Science USA Unconventional Stellar Aspect explorer USC University of Southern California USC University of South Carolina USDRE USer Differential Range Error USGCRP US Global Change Research Program USGS United States Geologic Survey USMCC U.S. Mission Control Center (NOAA) UT Universal Time UTLS Upper Troposphere Lower Stratosphere UV UltraViolet UVCS UltraViolet Coronagraph Spectrometer UVIS UltraViolet Imaging Spectrograph UVS UltraViolet Spectrometer VAFB Vandenberg Air Force Base VAI Vorticity Area Index VCCO Virtual Carbon Cycle Observatory VDF Vibrational Distribution Function VEFI Vector Electric Field Instrument VGMO Virtual GeoMagnetic Observatory VHF Very High Frequency VHO Virtual Heliospheric Observatory VIR Vortex-Induced Reconnection VITMO Virtual Ionospheric Thermospheric Mesospheric Observatory VLSI Very Large Scale Integration VMO Virtual Magnetospheric Observatory VMR Volume Mixing Ratio VMSO Virtual MagnetoSpheric Observatory VO Virtual Observatory VOACAP Voice of America Coverage Analysis Program- ionospheric model VOO Virtual Ocean Observatory VRBO Virtual Radiation Belt Observatory VSN Virtual Seismic Network VSPO Virtual Space Physics Observatory VSO Virtual Solar Observatory VSTO Virtual Solar-Terrestrial Observatory VTEC Vertical Total Electron Content WAAS Wide Area Augmentation System WACCM Whole Atmosphere Community Climate Model WAM Whole Atmosphere Model WATS Wind And Temperature Spectrometer WAWS West African Weather Model WBMOD Wide-Band scintillation MODel WBS Work Breakdown Structure WCIP World Climate Impact Program WCP World Climate Program WCRP World Climate Research Program WD World Day WDC World Data Center WEC Wave Experiment Consortium WETMITS Effects of Wave Processes in Energy Transfer in the Magnetosphere/ Ionosphere/Thermosphere System WFF Wallops Flight Facility WHAM Wisconsin H Mapper (WHM) WHISPER Waves of HIgh Frequency and Sounder for Probing of dEnsity by Relaxation WIDE Wideband Ionospheric Distortion Experiment WINDII WIND Imaging Interferometer WINE Winter In Northern Europe WIRE Wide-Field InfraRed Explorer WISER World Institute for Space Environment Research WITS World Ionosphere Thermosphere Study WMO World Meteorological Organization WMS World Magnetic Survey WRS WAAS Reference Stations WSA Wang-Sheeley-Arge Model WSA Weddell Sea Anomaly WSSEB Wallops Systems Software Engineering Branch WWLLN World Wide Lightning Location Network XRT X-Ray Telescope

Any comments, especially corrections and/or additions, are welcome. Please send comments to [email protected]