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The following is a list of acronyms often found in Space Science. If you have any corrections or addition, please email me at

For easier access, click on one of the following letters:
[A] | [B] | [C] | [D] | [E] | [F] | [G] | [H] | [I] | [J] | [K] | [L] | [M] | [N] | [O] | [P] | [Q] | [R] | [S] | [T] | [U] | [V] | [W] | [X] | [Y] | [Z]


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


BAS British Antarctic Survey
BBF Bursty Bulk Flows
BER Bit Error Rate
BIMS Bennett Ion Mass Spectrometer
BLPCOC Boundary Layer Physics by COordinated CLUSTER observations
BNSC British National Space Agency


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


FAC Field Aligned Currents
FAI Field Aligned Irregularities
FAIM Fully Analytic Ionospheric Model
FAST Fast Auroral SnapshoT
FGM Flux Gate Magnetometer
FISM Flare Irradiance Spectral Model
FLIP Field Line Inter-hemispheric Plasma model
FLIRE Field-aligned Link Ionospheric imaging Radar Experiment
FLR Field Line Resonance
FOV Field Of View
FPI Fabry-Perot Interferometer
FSW Flight SoftWare
FUSE Far Ultraviolet Spectroscopic Explorer


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
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


JASTP Journal of Atmospheric and Solar-Terrestrial Physics
JATP Journal of Atmosphere and Terrestrial Physics
JGR Journal of Geophysical Research
JISAO Joint Institute for the Study of Atmosphere and Ocean
JMA Japan Meteorological Agency
JPL Jet Propulsion Laboratory
JRO Jicamarca Radar Observatory
JSC Johnson Space Center


KAFB Kirtland Air Force Base
KDI Knowledge and Distributed Intelligence
KRM Kamide-Richmond-Matsushita Method
KSC Kennedy Space Center


LANL Los Alamos National Laboratory
LASCO Large Angle and Spectrometric COronograph
LASCO Large Aperture Solar Coronal Observatory
LCP Long Coded Pulse
LDAR Lightning Detection And Ranging System
LDE Long Duration Events
LDEF Long Duration Exposure Facility
LENA Low Energy Neutral Atom imager
LEO Low Earth Orbit
LET Linear Energy Transfer rate
LICA Low Energy Ion Composition Analyzer
LIDAR LIght Detection And Ranging
LLBL Low Latitude Boundary Layer
LNA Low Noise Amplifier
LPU Least Publishable Unit
LRPC Long-Range Planning Committee
LRR Launch Readiness Review
LSA Limited Space-charge Accumulation
LST Local Solar Time
LT Local Time
LTCS Lower Thermosphere Coupling Studies
LUF Lowest Usable Frequency
LV Launch Vehicle
LWS Living With a Star


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


OBC On-Board Computer
OGO Orbiting Geophysical Observatory
OLD Optical Lightning Detector
OMS Orbital Maneuvering System
ONR Office of Naval Research
OPO Operational Parametric Oscillators
OSEC Over-the-Satellite Electron Content
OSEI Operational Significant Imagery
OSS Office of Space Sciences
OTH Over-The-Horizon
OWF Optimum Working Frequency


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


QBO Quasi-Biennial Oscillation
QP Quasi-Periodic


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
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


UARS Upper Atmospheric Research Section (NSF)
UARS Upper Atmosphere Research Satellite (NASA)
UART Universal Asynchronous Receiver Transmitter
UCAR University Corporation for Atmospheric Research
UCWE Upward Coupling of Wave Energy
UDP Universal Data Packets
UHF Ultra-High Frequency
UHV Ultra-High Vacuum
ULDB Ultra Long Duration Balloon
UN United Nations
UNEP United Nations Environment Programme
UNESCO United Nations Educational, Scientific, and Cultural Organization
URSI Union Radio-Scientifique Internationale or International Union of Radio Science
USA Unconventional Stellar Aspect explorer
USGCRP US Global Change Research Program
UT Universal Time
UTLS Upper Troposphere Lower Stratosphere
UV UltraViolet
UVS UltraViolet Spectrometer


VAFB Vandenberg Air Force Base
VAI Vorticity Area Index
VEFI Vector Electric Field Instrument
VHF Very High Frequency
VLSI Very Large Scale Integration


WAAS Wide Area Augmentation System
WATS Wind And Temperature Spectrometer
WBMOD WideBand scintillation MODel
WBS Work Breakdown Structure
WCIP World Climate Impact Program
WCP World Climate Program
WCRP World Climate Research Program
WDC World Data Center
WETMITS Wave Processes in Energy Transfer in the Magnetosphere/Ionosphere/Thermosphere System
WFF Wallops Flight Facility
WHISPER Waves of HIgh frequency and Sounder for Probing of dEnsity by Relaxation
WIDE Wideband Ionospheric Distortion Experiment
WINE Winter in Northern Europe
WIRE Wide-Field InfraRed Explorer
WISER World Institute for Space Enviroment Research
WITS World Ionosphere Thermosphere Study
WMO World Meteorological Organization
WMS World Magnetic Survey




Other Acronym Sites:
AFRL acronym guide