| AA |
Auroral radio Absorption |
| ACCENT |
Atmospheric Chemistry of Combustion Emissions Near the Tropopause |
| ACE
| Advanced Composition Explorer |
| ACF
| AutoCorrelation Functions |
| ADCS
| Attitude Determination and Control Subsystem |
| ADEOS
| Advanced Earth Observation Satellite (Japan) |
| 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 |
| AFWA | Air Force Weather Agency |
| AGU | American Geophysical Union |
| AGW | Atmospheric Gravity Waves |
| AI | Asymmetry Index |
| AIDA | Arecibo Initiative in Dynamics of the Atmosphere |
| AL | Auroral Electrojet Lower Limit Index |
| ALF
| Absorption Limiting Frequency |
| ALIS
| Airglow Limb Imaging System |
| ALOMAR | Arctic Lidar Observatory for Middle Atmospheric Research |
| ALSP | Apollo Lunar Surface Probe |
| 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 |
| AMPTE
| Active Magnetospheric Particle Tracer
Explorer |
| AMS
| American Meteorological Society |
| ANL | Argonne National Laboratory |
| AO | Arecibo Observatory |
| AO | Announcement of Opportunity |
| 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 |
| ARTEMIS
| Advanced Relay and Technology Mission Satellite (ESA) |
| ASDI
| All-Sky Doppler Interferometer |
| ASPOC
| Active Spacecraft Potential Control |
| ASTER | Advanced Space borne Thermal Emission and Reflection Radiometer |
| ATM | ATMospheric Sciences Division (NSF) |
| 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 |
| AZIS | AriZona Imaging Spectrograph |
| C&DH
| Command and Data Handling |
| CADITS
| Coupling And Dynamics of the Ionosphere-Thermosphere System |
| CAPE
| Convective Available Potential Energy |
| CAPER | Cleft Accelerated Plasma Experimental Rocket |
| CASI
| Canadian Aeronautics and Space Agency |
| CASPER | Center for Astrophysics, Space Physics and Engineering Research |
| CAT
| Coordinated Analysis of the Thermosphere |
| CAWSES
| Climate And Weather of the Sun-Earth-System |
| CCCO
| Committee on Climatic Changes and the Ocean |
| CCD | Charge Coupled Devices |
| CCE
| Charge Composition Explorer |
| CCM | Community Climate Model |
| CCMC | Community Coordinating Modeling Center |
| CDF | Common Data Format |
| CDR | Critical Design Review |
| CD-ROM
| Compact Disc-Read Only Memory |
| CEDAR | Coupling, Energetics, and Dynamics of Atmospheric Regions |
| CEOS
| Committee on Earth Observation Satellites |
| CERES | Clouds and the Earth's Radiant Energy System |
| CERTO
| Coherent Electromagnetic Radio
Tomography |
| CGS
| Center for Geospace Studies |
| CHAMP | CHAllenging Mini-Satellite Payload |
| CHARS | Coronal-Hole-Active Region-Current Sheet |
| CINDI
| Coupled Ion-Neutral
Dynamics Investigation |
| CIR
| Corotating Interaction Regions |
| CIRA
| Cooperative Institute for Research in the Atmosphere |
| CIRA
| COSPAR International Reference Atmosphere |
| CIS
| Cluster Ion Spectrometry |
| CISM
| Center for Integrated Space Weather Modelling |
| CIT
| Computerized Ionospheric Tomography |
| CIV | Critical Ionization Velocity experiment |
| CLAES | Cryogenic Limb Array Etalon Spectrometer |
| CME | Coronal Mass Ejection |
| C/NOFS | Communication/Navigation Outage Forecast System |
| COADS
| U.S. Comprehensive Oceans-Atmospheres Data Sets |
| CODA
| Coupling of Dynamics and Aurora |
| CO-I
| CO-Investigator |
| COPE | Cooperative Observations of Polar Electrodynamics |
| COPEX
| COnjugate Point EXperiment |
| COPP
| COronal Physical Processes |
| COPUOS
| U.N. 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 |
| CPEA
| Coupling Processes in the Equatorial Atmosphere |
| CRIS | Cosmic Ray Isotope Spectrometer |
| CRRES | Combined Release and Radiation Effects Satellite |
| CRU
| Climate Research Unit |
| CSD | Covariance Spectral Density |
| CSG
| CAWSES Steering Groups |
| CSSC | CEDAR Science Steering Committee |
| CSSG
| CAWSES Scientific Steering Group |
| CSSP | Committee on Solar and Space Physics |
| CSTR | Committee on Solar-Terrestrial Relations |
| CTIM | Coupled Thermosphere Ionosphere Model |
| CUPRI | Cornell University Portable Radar Interferometer |
| DAAC
| Distributed Active Archive Center |
| DAMSON
| Doppler And Multipath SOunding Network |
| DAO
| Data Assimilation Office (NASA) |
| DASI
| Distributed Array of Small Instruments |
| DAWEX
| Darwin Area Wave EXperiment |
| DBS | Direct Broadcasting Satellite receivers |
| DCS
| Differential Cross Section |
| 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 |
| DIAL | DIfferential Absorption Lidar |
| DIDM
| Digital Ion Drift Meter |
| DLL
| Delay Locked Loop |
| DM | Drift Meter |
| DMI | Danish Meteorological Institute |
| DMSP | Defense Meteorological Satellite Program |
| DOC | DataLynx Operating Center |
| DoD
| Department of Defense |
| DPU
| Data Processing Unit |
| DRA
| Defence Research Agency |
| DSP | Digital Signal Processing |
| DSI | Deep Space I probe |
| Dst | Disturbance Storm Time index |
| DVD
| Density Vertical Drift |
| DWP
| Digital Wave Processor |
| DYANA
| DYnamics Adapted Network for the Atmosphere |
| EADEX
| Equatorial Atmosphere Dynamics
EXperiment |
| EAR
| Equatorial Atmosphere Radar |
| EBC
| Energy Budget Campaign |
| ECR | Electron Cyclotron Resonance |
| EDAM
| Electron Density Assimilative Model |
| EDI
| Electron Drift Instrument |
| EDP | Electron Density Profiles |
| EEA
| Electron Electrostatic Analyzer |
| EFW
| Electric Fields and Waves |
| EGS | European Geophysical Society |
| EIA | Equatorial Ionization Anomaly |
| EICS | Energetic Ion Composition Spectrometer |
| EISCAT
| European Incoherent SCATter facility |
| EIT
| Equatorial Ionosphere-Thermosphere System |
| EIT
| Extreme Infrared Telescope |
| ELV | Expendable Launch Vehicle |
| EMAD
| Equatorial Middle Atmosphere Dynamics |
| EMFI | Electric and Magnetic Field Instrument |
| ENA
| Energetic Neutral Atom |
| ENSO | El-Nino Southern Oscillation |
| EOS | Earth Observing System |
| EPB
| Equatorial Plasma Bubbles |
| 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 |
| ERS
| Earth Remote Sensing Satellite (ESA) |
| ESA | European Space Agency |
| ESF | Equatorial Spread-F |
| ESOC
| European Space Operations Center |
| ESTEC
| European Space Research and Technological Center |
| ETA | Equatorial Temperature Anomaly |
| ETWA | Equatorial Temperature and Wind Anomaly |
| EUMETSAT
| EUropean Organziation for the Exploitation of Meteorological Satellites |
| EUV | Extreme UltraViolet |
| EUVIP | Extreme UltraViolet Imaging Photometer |
| EVA
| ExtraVehicular Activity
|
| GAEM
| Global Atmospheric Electricity Measurement programs |
| GAIM
| Global Assimilation of Ionospheric Measurements |
| GAIM
| Global Assimilation of Ionspheric Models |
| GALE
| Giant Aperture LIDAR Experiment |
| GAPS
| Global Aspects of Plasma Structures |
| GASP | Global Atmospheric Sampling Program |
| GATOM
| GNSS Air Traffic Operations Model |
| GBOA | Ground Based Optical Aeronomy |
| GCM | General Circulation Model |
| GCN | Ground Communications Network |
| GCR | Galactic Cosmic 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 |
| GEO | GEOsciences Directorate (NSF) |
| GEONET
| GPS Earth Observation NETwork |
| GFO | GEOSAT Follow On |
| GGCM | Global Geospace Circulation Model |
| GGS
| Global Geospace Science |
| GHCN
| Global Historical Climatology Network |
| GIFT | Global Ionospheric Forecasting Techniques |
| GILS | Government Information Locator Service |
| GIMI | Global Imaging Monitor of the Ionosphere |
| GISS
| Goddard Institute for Space Sciences |
| GNSS | Global Navigation Satellite Systems |
| GOES | Geostationary Operational Environmental Satellite |
| GOLD
| Geophysical On-Line Data |
| 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 |
| GSFC | Goddard Space Flight Center |
| GSTV
| Global Scale Tidal Variability |
| GSWM | Global Scale Wave Model |
| GUVI | Global UltraViolet Imager |
| 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 |
| HAO | High Altitude Observatory |
| HAPI | High Altitude Plasma Instrument |
| HASDM
| High Accuracy Satellite Drag Model |
| HATI | Hanson Anemometer for Thermospheric Investigations |
| HDPTA
| High Density Peruvian Tomography Array |
| HENA
| High Energy Neutral Atom imager |
| HERS | High Energy Range Spectrometer |
| HESSI
| High Energy Solar Spectroscopic Imager |
| HF | High Frequency (radar) |
| HILAT
| High Latitude Satellite |
| HILT
| Heavy Ion Large area proportional counter Telescope |
| HIRAAS | HIgh Resolution Airglow and Aurora Spectroscopy experiment |
| 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 |
| HRDI | High Resolution Doppler Imager |
| HTI
| Height-Time Intensity |
| I3RC | Inter-comparison of 3-D Radiation Codes |
| IAGA | International Association of Geomagnetism and Aeronomy |
| IAMAS | International Association of Meteorology and Atmospheric Sciences |
| I&T |
Integration and Testing |
| ICD | Interface Control Document |
| ICMA
| IAMAS Commission for the Middle Atmosphere |
| ICMC | International Complete Meridian Chain |
| ICRCCM-2 | Inter-Comparison of Radiation Codes for use in Climate Models |
| ICSU | International Council of Scientific Unions |
| IDA3D
| Ionospheric Data Assimilation 3-Dimensional model |
| IDI
| Imaging Doppler Interferometer |
| IDL | Interactive Data Language |
| IDM | Internal Discharge Monitor |
| IDM | Ion Drift Meter |
| IDT
| Instrument Development Team |
| IEC | Ionospheric Electron Content |
| IEF
| Interplanetary Electric Field |
| IF
| Intermediate Frequency |
| IFM
| Ionospheric Forecast Model |
| IGAC
| International Global Atmospheric Chemistry Project |
| IGRF | International Geomagnetic Reference Field |
| IGS | International GPS Service |
| IGY
| International Geophysical Year |
| IHS
| International Heliospheric Study |
| IISL
| International Institute of Space Law |
| ILAS | Improved Limb Atmospheric Spectrometer |
| IMAGE | Imager for Magnetopause-to-Aurora Global Exploration |
| IMF | Interplanetary Magnetic Field |
| IMP | Interplanetary Monitoring Platform |
| IMS | International Magnetospheric Study |
| IMS | Ion Mass Spectrometer |
| INAG
| Ionosonde Network Advisory Group |
| IOC
| Intergovernmental Oceanographic Commission |
| IONEX
| IONosphere EXperiment |
| 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 |
| IPP
| Ionospheric Pierce Point |
| IQSY
| International Quiet Sun Year |
| IR&D | Instrument Research & Development |
| IRI | International Reference Ionosphere |
| IRO
| Ionospheric Radio Occultation |
| ISAS |
Institute for Space and Astronautical Science of Japan |
| 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 |
| ISIS | International Satellite For Ionospheric Study |
| ISO
| Intr-Seasonal Oscillation |
| 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 |
| ISY
| International Space Year |
|
| Intra-Seasonal Variations |
| IT | Ion Trap |
| ITCZ
| Inter-Tropical Convergence Zone |
| ITM | Ionosphere Thermosphere Magnetosphere |
| IUCAF
| Inter-Union Commission on Frequency Allocation 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 |
| MAC
| Middle Atmosphere cooperation |
| MAGCON
| MAGnetosphere CONstellation |
| MAGIC |
Magnetometer Array on the Greenland Ice Cap |
| MALT | Mesosphere And Lower Thermosphere |
| MAP
| Middle Atmosphere Program |
| MAST
| MAss Spectrometer Telescope |
| MAT | Marine Atmospheric Temperature |
| MATC
| Middle Atmosphere and Tropospheric Climate |
| MCC | Mission Control Center |
| MCD
| Magnetotail Constellation Draco |
| MCISTP
| Magnetotail Campaign Collaborating with International Solar-Terrestrial Physics missions |
| MCP | Micro Channel Plate |
| MCRA
| Minor Constituent Reference Atmosphere |
| MEASURE
| Magnetometers along the Eastern Atlantic Seaboard for Undergraduate Research and Education |
| MEDAC
| Meteor Echo Detection And Comparison |
| MENA
| Medium Energy Neutral Atom imager |
| MESA
| Minaturized ElectroStatic Analyzer |
| MF | Medium Frequency (radar) |
| MFSM | Magnetospheric Forecast and Specification Model |
| MHD | MagnetoHydroDynamics |
| MIC | Mission Initiation Conference |
| MICAS | Miniature Integrated Camera Spectrometer |
| MICPAD
| Magnetosphere-Ionosphere Coupling and Polar Auroral Dynamics |
| MIDAS
| Multi Instrument Data Analysis Software |
| MIDEX
| Medium Class Explorer |
| MIDP | Mars Instrument Development Program |
| MIME | Multipurpose Internet Mail Extensions |
| MISA
| Millstone Ionospheric Steerable Antenna |
| MISETA | Multi-Instrument Studies of Equatorial Thermospheric Aeronomy |
| MISR | Multi-angle Imaging SpectroRadiometer |
| MITM | Mesosphere Ionosphere Thermosphere Magnetosphere |
| MLD | Mid Latitude Disturbances |
| MLS | Microwave Limb Sounder |
| MLT |
Magnetic Local Time |
| MLT | Mesosphere and Lower Thermosphere |
| MLTCS
| Mesosphere Lower-Thermosphere Coupling Study |
| MMS
| Magnetosphere MultiScale |
| MOC
| Mission Operation Center |
| MODA | Magneto Optic Doppler Analyzer |
| MODIS | MODerate-resolution Imaging Spectroradiometer |
| MOMLA
| Modeling Of Possible Solar Variability Effects in the Middle and Lower Atmosphere |
| MOPITT | Measurements Of Pollution In The Troposphere |
| MOU | Memorandum Of Understanding |
| MPAE | Max-Planck Institute for Aeronomy |
| MPI
| Max-Plank Institute |
| MPI | Method Passing Interface |
| MPL
| MicroPulse Lidar |
| MRF | Mobile Research Facility |
| MRR | Mission Readiness Review |
| MSFC |
Marshall Space Flight Center |
| MSIS | Mass Spectrometer and Incoherent Scatter Model |
| MSP
| Meridian Scanning Photometer |
| MSS | Multi Spectral Scanner |
| MSU | Microwave Sounding Unit |
| MSX
| Midcourse (or Midscale) Space EXperiment |
| MTA | Midnight Temperature Anomaly |
| MTM | Midnight Temperature Maximum |
| MTSAT
| Multifunctional Transport SATellite |
| MUF | Maximum Usable Frequency |
| MURI | Multi-disciplinary University Research Initiative |
| 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 |
| 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 |
| 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 |
| NGDC | National Geophysical Data Center |
| NHB
| NASA Handbook |
| NLC | NoctiLucent Clouds |
| NLDN | National Lightning Detection Network |
| NN | Neural Network |
| NNSS
| Navy Navigational Satellite System |
| NOAA
| National Oceanic and Atmospheric
Administration |
| NPA
| Non-Precision Approach |
| NPOESS
| National Polar Orbiting Environmental Satellite System |
| NRA | NASA Research Announcement |
| NRC | National Research Council |
| NRL | Naval Research Laboratory |
| NRO | NASA Research Opportunity |
| 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 |
| NSSDC | National Space Science Data Center |
| NSWP | National Space Weather Program |
| NWM | Neutral Wind Meter |
| NWRA
| NorthWest Research Associates |
| PAD
| Pitch Angle Distribution |
| PAPCO | PAnel Plot Composer |
| PCA
| Polar Cap Absorption |
| PCA | Photon Counting Array |
| PCO | Polar Cap Observatory |
| PCU
| Panel Control Unit |
| PEACE
| Plasma Electron And Current Experiment |
| PEFE | Plasma Enhanced Field Emission |
| PEM | Pacific Exploratory Mission |
| PET
| Proton/Electron Telescope |
| PFP | Plasma Frequency Probe |
| PI | Principal Investigator |
| PIC | Project Initiation Conference |
| PIDP
| Planetary Instrument Development
Program |
| PIM | Parameterized Ionospheric Model |
| PIP | Plasma Impedance Probe |
| PL
| Payload |
| PLISD | Pulse Laser Induced Sputtering Deposition |
| PLL
| Phase Locked Loop |
| PLP
| Planar Langmuir Probe |
| PM
| Program Manager |
| PMC
| Polar Mesospheric Clouds |
| PMSE | Polar Mesosphere Summer Echoes |
| PMT | PhotoMultiplier Tube |
| POES
| Polar Operational Environmental Satellite |
| POLAN
| POLynomial ANalyses method |
| POLITE
| Plasmaspheric Observations of Light Ions in the Topside and Exosphere |
| PRE
| Pre-Reversal Enhancement |
| PREASA | Pacific Region Equatorial Anomaly Studies in Asia |
| PRF
| Pulse Repetition Frequency |
| PRIMO | Problems Related to Ionospheric Models and Observations |
| PSC | Polar Stratospheric Clouds |
| PSMOS | Planetary Scale Mesopause Observing System |
| PSO | Planetary Scale Oscillation |
| PSS | Planetary and Space Sciences |
| PVWave | Precision Visual Wave |
| PWI | Plasma Wave Instrument |
| RAO | Relocatable Atmospheric Observatory |
| RAPID
| Research with Adaptive Particle Imaging Detectors |
| RCM
| Rice Convection Model |
| RDT&E
| Research, Development, Test, and
Evaluation |
| REFIMS | Rotating Electric Field Ion Mass Spectrometer |
| RF | Radio Frequency |
| 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 |
| ROCSAT | Republic Of China SATellite |
| ROSE
| ROcket and Scatter Experiments |
| ROSS | Research Opportunity in Space Science |
| ROSES
| Research Opportunities in Space and Earth Sciences |
| RPA | Retarding Potential Analyzer |
| RPI
| Radio Plasma Imager |
| 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 |
| RTI | Rayleigh Taylor Instability |
| RTI | Range Time Intensity |
| S3 | Small Scientific Satellite |
| S/A
| Solar Array |
| SABER | Sounding of the Atmosphere using Broadband Emission Radiometry |
| SAFISY
| Space Agency Forum on International Space Year |
| SAI | Spin-scan Aurora Imager |
| SAIC | Science Applications International Corporation |
| SAID
| Sub-Auroral Ionospheric Disturbances |
| SAL | Sudden Atom Layer |
| SAMBO
| Simultaneous Auroral Multi-Balloons Observations |
| SAMNET
| Sub-Auroral Magnetometer NETwork |
| SAMPEX
| Solar Anomalous and Magnetospheric Particle EXplorer |
| SAO
| Southern Atlantic Oscillation |
| SAPS
| Sub-Auroral Polarization Streams |
| SAPSWS
| SAPS Wave Structure |
| SAR arc | Stable Auroral Red arc |
| SAR | Synthetic Aperture Radar |
| SBAS
| Satellite-Based Augmentation System |
| SBR | Space-Based Radar |
| S/C |
SpaceCraft |
| SCAR
| Scientific Committee on Antarctic Research |
| SCC
| Super Cloud Cluster |
| SCEX | Space Craft Charging Experiments |
| SCINDA | SCINtillation Detection Algorithm |
| SCINTMON | SCINTillation MONitor |
| SCORE
| Self-Calibration of Range Errors |
| SCORPION
| SCORE for Plasmasphere and IONosphere |
| SCOSTEP | Scientific Committee On Solar-TErrestrial Physics |
| 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 |
| SED
| Storm Enhanced Density |
| SEE | Solar EUV Experiment |
| SEE | Single Event Effects |
| SEFI | Single Event Functional Interrupt |
| SEGR | Single Event Gate Rupture |
| SEL | Single Event Latchup |
| SEL | Space Environment Laboratory |
| SEM | Scanning Electron Microscope |
| SEP | Solar Electric Propulsion |
| SES
| Sun-Earth Systems |
| SESC
| Space Environment Service Center |
| SESCAT
| Sopradic-E SCATter Experiement |
| SESS
| Space Environmental Sensor Suite |
| SETI | Search For Extraterrestrial Intelligence |
| SEU | Single Event Upsets |
| SFPS | Spacecraft Functional Performance Specification |
| SGD
| Solar Geophysical Data |
| SHE | Single Hard Error |
| SHIMMER
| Spatial Hetrodyne IMager for Mesospheric Radicals |
| SHINE | Solar Heliosphere and INterplanetary Environment program |
| SHS
| Spatial Hetrodyne Spectroscopy |
| SI | Spacecraft Interface |
| SID
| Sudden Ionospheric Disturbances |
| SIMD | Single Instruction/Multiple Data |
| SIS | Solar Isotope Spectrometer |
| SLP | Sweeping Langmuir Probe |
| SLS
| Structure of the Lower Stratosphere |
| 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 |
| SOHO | SOlar and Heliospheric Observatory |
| SOLTIP | SOLar Connection with Transient Interplanetary Phenomenon |
| SOR
| Starfire Optical Range |
| SOW | Statement Of Work |
| SPA | Space Physics and Aeronomy |
| SPAD | Single Photon Avalanche Diodes |
| SPARC | Stratospheric Processes And their Role in Climate |
| SPARC
| Space and Aeronomy Research Center |
| SPARC | Space Physics and Aeronomy Research Collaboration |
| SPDS
| Space Physics Data Systems |
| SPE
| Solar Particle Event |
| SPyCAT | Space Physics CATalog |
| SR&T | Supporting Research and Technology |
| SRAM | Static Random Access Memory |
| S-RAMP | STEP-Results, Applications, and Modeling Phase |
| SRI |
Stanford Research Institute International |
| SSAT | Space Science, Applications, and Technology Lab (at UTD) |
| SSB | Solar Sector Boundaries |
| SScAC | Space Science Advisory Committee |
| SSG
| Science Steering Group |
| SSI
| Space Science Institute |
| SSIES-3
| Space Science Ion and Electron
Sensor |
| SSM/I | Special Sensor Microwave/Imager |
| SSPM | Satellite Surface Potential Monitor |
| SSR
| Space Science Reviews |
| SST | Sea Surface Temperature |
| SSU | Stratospheric Sounding Unit |
| SSULI | Special Sensor UV Limb Imager |
| STAFF
| Spatio-Temporal Analysis of Field Fluctuations |
| STDN | Space Tracking and Data Network |
| STEL
| Solar-Terrestrial Environment
Laboratory |
| STEM
| Solar Terrestrial Environment Model |
| STEP | Solar Terrestrial Energy Program |
| STEREO | Solar TErrestrial RElations Observatory |
| STG
| Spectral Tide-Gauge |
| STIS | Space Telescope Imaging Spectrograph |
| STK | Satellite Tool Kit |
| STP | Solar-Terrestrial Physics |
| STP | Space Test Program |
| STS
| Solar Terrestrial Science |
| 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 |
| SWAS | Sub-millimeter Wave Astronomy Satellite |
| SWG | Science Working Group |
| SwRI | Southwest Research Institute |
| SWS | Space Weather Squadron |
| SXI
| Solar X-ray Imager |
| SXP | Solar X-ray Photometer |
| 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 |
| TDC | Top Dead Center |
| TDIM | Time Dependent Ionospheric Model |
| TDRSS
| Tracking and Data Relay Satellite
System |
| TEC | Total Electron Content |
| TEP
| TransEquatorial Propagation |
| TGF | Terrestrial Gamma-Ray Flashes |
| THEMIS
| Time History of Events and Macroscale Interactions during Substorms |
| TID | Traveling Ionospheric Disturbances |
| TID | Total Ionizing Dose |
| TIDI | TImed Doppler Interferometer |
| TIEGCM | Thermosphere/Ionosphere/Electrodynamic General Circulation Model |
| TIGER
| Thermosphere/Ionosphere Geospheric Research Synposium |
| TIL | Tidal Ion Layers |
| 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 |
| TLS | Tethered Lifting System |
| TM | TeleMetry |
| TMA | TriMethyl Aluminum |
| TMAH | Tetra Methyl Aluminum Hydroxide |
| TOI
| Tongue Of Ionization |
| TOMS | Total Ozone Mass Spectrometer |
| TPS
| The Planetary Society |
| TQMS | Triple Quadrupole Mass Spectrometer |
| TRACE | Transition Region And Coronal Explorer |
| TRAMP | Transitional and Rarefied
Axisymmetric Monte Carlo Simulation Process |
| TROZ | Tropospheric Ozone Campaign |
| TSS | Targeted Search System |
| TT&C
| Telemetry, Tracking, and Command |
| TURBO | TURBulent upwellings Over Arecibo observatory |
| TWP-ICE
| Tropical Western Pacific-International Cloud Experiment |