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H |

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Z

S

SAI —  SAS —  SCA —  SCS —  SDR —  SEC —  SEL —  SF —  SI —  SIS —  SLR —  SMO
SOC —  SOS —  SPF —  SPP —  SRO —  SSD —  SSR —  STC —  STIP —  SU

ACRONYM	DEFINITION	CONTRIBUTOR
s	second (Symbol) (SI unit of time)	Langley
S	Scout (Small class expendable launch vehicle)	CASI
S&A	Safety and Arming Device	CASI
S&B	Specs and Bodies (Skipped the S)	Goddard
S&E	Science and Engineering	Goddard
S&EG	Space and Electronics Group	Goddard
S&L	Savings and Loan (Association)	Langley
S&M	Service/Maintenance (NASA)	Langley
S&M	Structures and Materials	Langley
S&M	Structures and Mechanical	Goddard
S&M	Structures and Mechanisms	Goddard
S&MA	Safety and Mission Assurance	Goddard
S&MS	Structures and Mechanisms Subsystem	Goddard
S&R	Search and Rescue System	Langley
S&T	Scientific & Technical	Langley
S/L	Spacelab	CASI
S/N	Serial Number	Goddard
S/N	Signal to Noise	Goddard
S/W	Software	Langley
S/W CCB	Software Configuration Control Board	Goddard
S/WA	Software Assurance	Goddard
S/WCI	Software Configuration Item	Goddard
SA	Selective Availability	CASI
SA	Site Activation (NASA)	Langley
SA	Solar Array	Goddard
SA	Springfield Armory, MA	CASI
SA	Supplemental Agreement	Langley
SA	Single Access	CASI
SAA	Satellite Active Archive (NOAA)	Goddard
SAA	Solar Array Assembly	Goddard
SAA	Space Act Agreement	Langley
SAA	South Atlantic Anomaly	CASI
SAAC	Space Applications Advisory Committee	Langley
SAAP	Analysis and Preservation (Pathfinder)	CASI
SAAP	Sample Acquisition	CASI
SAB	Satellite Assembly Building Storage and Assembly Bldg.	CASI
SABER	Sounding of the Atmosphere using Broadband Emission Radiometers (or Radiometry)	Langley
SABER	Swing Arm Beam Erector	CASI
SABR	Special Assessment Baseline Review	Goddard
SAC	Satellite de Aplicaciones Cientificas	Goddard
SAC	Second Axial Carrier	Goddard
SAC	Solar Array Carrier	Goddard
SAC	Supplier Assurance Contract	Goddard
SAC	Strategic Air Command	CASI
SAC-A	Satellite de Aplicaciones Cientificas-A	Goddard
SACB	Satellite de Aplicaciones Cientificas-B (Argentina)	CASI
SAC-C	Satellite de Aplicaciones Cientificas-C	Goddard
SACC	Science and Applications Computing Center	CASI
SACO	Strategic Air Command, Offutt Air Force Base, NE	CASI
SADA	Solar Array Drive Assembly	Goddard
SADCO	South African Data Center for Oceanography	Goddard
SADE	Solar Array Drive Electronics	Goddard
SADE	Structural Assembly Demonstration Experiment (for orbital assembly of large Space Structures)	CASI
SADM	Solar Array Drive Mechanism	Goddard
SADTC	SHAPE Air Defense Technical Center, The Hague (Netherlands)	CASI
SAE	Society of Automotive Engineers (Acronym is now organization's official name)	Langley
SAEF	Spacecraft Assembly and Encapsulation Facility	CASI
SAEF-2	Spacecraft Assembly and Encapsulation Facility #2	Goddard
SAERS	Systems Analysis & Engineering Research Support	Langley
SAF	Single Access Forward [TDRS]	Goddard
SAF	Spacecraft Assembly Facility	Goddard
SAFARI	South African Fire Research Institute	Goddard
SAFARI	Southern African Fire-Atmosphere Research Initiative	Langley
SAFARI	Southern African Regional Science Initiative	Goddard
SAFDE	Solar Array Flight Dynamic Experiment	CASI
SAFE	San Andreas Fault Experiment	CASI
SAFE	Solar Array Flight Experiment	CASI
SAFI	SemiAutomatic Flight Inspection	CASI
SAFIRE	Spectroscopy of the Atmosphere using Far-Infrared Emission	Langley
SAFlRE	Submillimeter and Far Infrared Experiment	Goddard
SAGA	Solar Array Gain Augmentation	Goddard
SAGA	Software Application, Generation and Administration	CASI
SAGE	Stratospheric Aerosol and Gas Experiment	CASI
SAGE III	Stratospheric Aerosol and Gas Experiment III	Langley
SAGT	Solarized Advanced Gas Turbine	CASI
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SAI	Spectrum Astro Incorporated	Goddard
SAI	Swales Aerospace, Inc.	Goddard
SA-I	Solar Array-I	Goddard
SAIC	Science Applications International Corporation	Langley
SA-II	Solar Array-II	Goddard
SA-III	Solar Array-III	Goddard
SAIL	Shuttle Avionics Integration Lab	Goddard
SAIS	Science and Applications Information System	CASI
SALSA	Semi-Arid Land-Surface-Atmosphere	Goddard
SALT	Situation Awareness Logistics Tool	CASI
SALT	Special (Purpose Inexpensive Satellite) Altimeter	CASI
SAM	Small Angel Maneuver	Goddard
SAM	Sound Absorbing Materials (See also RAM Radar Absorbing Materials)	CASI
SAM	Space-viewing Analog-electronic Module	Goddard
SAM	Stratospheric Aerosol Measurement	Goddard
SAM	System Assurance Manager	Goddard
SAM	Shuttle Activation Monitor	CASI
SAM II	Stratospheric Aerosol Measurement II	Langley
SAM II	Stratospheric Aerosol Measurement 2	CASI
SAMB	School of Aerospace Medicine, Brooks Air Force Base, TX	CASI
SAMBAR	Small and Minority Business Activity Reporting	Goddard
SAMEX	Soviet American Microwave Experiment	CASI
SAMIS	Structural Analysis and Matrix Interpretive System	CASI
SAM-PEX	Solar, Anomalous, and Magnetospheric Particle Explorer Satellite	Langley
SAMPEX	Solar, Anomalous, and Magnetospheric Particle Explorer	CASI
SAMPIE	Solar Array Module Plasma Interaction Experiment	CASI
SAMS	Shuttle Acceleration Measurement Systems	Goddard
SAMS	Space Accelerator Measurement System	Langley
SAMS	Stratospheric and Aerospheric Sounder	CASI
SAMS	Stratospheric and Mesospheric Sounder	Langley
SAMS	Support and Maintenance System	Goddard
SAMS	Space Acceleration Measurement System	CASI
SAMS	Servicing and Maintenance System	Goddard
SAMSAT	Solar Activity Monitoring Satellites (NOAA/UAF)	CASI
SAMSO	Space and Missiles Systems Organization	CASI
SAN	Storage Area Network	CASI
SAO	Smithsonian Astrophysical Observatory	CASI
SAP	Sintered Aluminum Product	CASI
SAR	Safety Analysis Report (Nuclear energy)	Langley
SAR	Safety Assessment Report	Goddard
SAR	Schedule and Requests	Goddard
SAR	Single Access Return (TDRS)	Goddard
SAR	Software Assurance Requirement	Goddard
SAR	Synthetic Aperture RADAR	Langley
SAR	Scientific Absorption Rate	CASI
SAR	Search and Rescue	CASI
SAR	Stable Auroral Red (arc)	CASI
SAR	Subject Analysis and Retrieval (a CENDI Working Group)	CASI
SAR	Summary Analysis Report	CASI
SAR	Synthetic Aperture Radar	CASI
SARB	Surface and Atmosphere Radiation Budget	CASI
SARB	Surface Atmospheric Radiation Budget	Langley
SAREX	Shuttle Amateur Radio Experiment	CASI
SARP	Signal Automatic Radar Processing	CASI
SARPS	Standards and Recommended Practices	Langley
SARSAT	Search And Rescue Satellite Aided Tracking	CASI
SARSEX	SAR internal wave Signature EXperiment	CASI
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SAS	Service Accounting Segment (NCC)	Goddard
SAS	Solar Array Simulator	Goddard
SAS	SeaWIFSborne Simulator	CASI
SAS	Space Adaptation Syndrome	CASI
SAS	Stability Augmentation System	CASI
SASA	Small Astronomy Satellite A	CASI
SAS-C	Scientific Applications Satellite-C	Goddard
SASCOE	Solar Array Special Checkout Equipment	Goddard
SASET	Software Architecture Sizing Estimating Tool	Goddard
SASIG	STEP Automotive Special Interest Group	Goddard
SASP	Science and Applications Space Platforms	CASI
SASS	SEASAT (Sea Satellite) A Scatterometer System (NASA)	Langley
SASS	Seasat A Scatterometer System	Goddard
SASS	Seasat A Satellite Scatterometer	CASI
SASS	Subsonic ASSessment	CASI
SAT	Structural Analysis Team	Langley
SATAN	Sensor for Airborne Terrain Analysis	CASI
SATAN	Satellite Automatic Tracking Antenna	Goddard
SATS	Small Aircraft Transportation Systems	Langley
SATS	Supply Access Terminal System	Goddard
SAVE	Simulation Assessment Validation Environment	Langley
SAVI	Soil-Adjusted Vegetation Index	Goddard
SAW	Surface Acoustic Wave	CASI
SAX	Satellite per Astronomia X (X-ray Astronomy Satellite)	Goddard
SAXS	Small Angle Xray Scattering	CASI
SBA	Small Business Administration	CASI
SBADPCM	Sub Band Adaptive Differential Pulse Mode Modulation	CASI
SBAS	Satellite-based augmentation systems	JPL
SBBN	Standard Big Bang Nucleosynthesis	CASI
SBC	Solar Blind Channel	Goddard
SBF	Spacecraft Background Simulator	Goddard
SBF	Surface Brightness Fluctuation	Goddard
SBF	Single Barrier Failure	CASI
SBF	Skin Blood Flow	CASI
SBIR	Small Business Innovative Research	CASI
SBIRS	Small Business Innovative Research	CASI
SBIRSHigh (or Low)	Space Based Infra Red System High (or Low)	CASI
SBMB	Supervisory Bus Monitor Buffer	Goddard
SBR	Space Based Radar	CASI
SBRC	Santa Barbara Research Corporation	Goddard
SBRS	Santa Barbara Remote Sensing	Goddard
SBS	Satellite Business Systems	CASI
SBS	Shift Bit Select	CASI
SBS	Stimulated Brillouin Scattering	CASI
SBS	Symbol by Symbol	CASI
SBUB	Solar Backscatter Ultraviolet	Langley
SBUV	Solar Backscatter Ultraviolet Spectral	Goddard
SBUV	Solar Backscatter Ultraviolet Spectrometer	Langley
SBUV/TOMS	Solar Backscatter Ultraviolet Spectrometer/Total Ozone Mapping Spectrometer	CASI
SC	System Controller	Goddard
SC&CU	Signal Conditioning and Control Unit	Goddard
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SCA	Snow-Covered Area	Goddard
SCA	Spacecraft Checkout Area (GSFC Bldg 7, Rm 108)	Goddard
SCA	Subcontract Award	Goddard
SCA	System Concept Analysis	Goddard
SCA/SMS	Shuttle Carrier Aircraft/Shuttle Mission Simulator	CASI
SCALE	Shuttle Coherent Atmospheric LIDAR Experiment	CASI
SCAMA	Switching, Conferencing, and Monitoring Arrangement	Goddard
SCAMP	Satellite Command Antenna on Medium Pedestal	Goddard
SCAN	Selected Current Aerospace Notices	CASI
SCANSAR	Scanning Synthetic Aperture Radar	Goddard
SCAPE	Self Contained Atmospheric Protective Ensemble	Goddard
SCAR	Satellite Communications Applications Research program	Langley
SCAR	Supersonic Cruise Aircraft Research	CASI
SCARAB	Scanner for the Radiation Budget	Goddard
SCAR-B	Smoke, Cloud, and Radiation-Brazil	Goddard
SCARLET	Solar Concentrator Array with Refractive Linear Element Technology	CASI
SCAS	Stability and Control Augmentation Systems	CASI
SCAT	Supersonic Commercial Air Transport	CASI
SCATHA	Spacecraft Charging at High Altitude (satellite)	CASI
SCATS	Simulation Checkout And Training System (Realistic Simulation	CASI
SCB	Schedule Control Board	Goddard
SCB	Steering Control Box (Space Shuttle)	CASI
SCC	Stress Corrosion Cracking	Goddard
SCCB	Software Configuration Control Board	Langley
SCCEG	Scientific Coordinating Committee for Experimental Gravitation	CASI
SCCER	System Command and Control Equipment Rack	Goddard
SCCS	Source Code Control System	Goddard
SCD	Small Conversion Data	Goddard
SCD	Source Control Document	Goddard
SCD	Source Control Drawing	Goddard
SCDP	Safety Compliance Data Package	Goddard
SCE	Secondary Converter Electronics	Goddard
SCE	Selective Communication Equipment	Goddard
SCEPS	Stored Chemical Energy Propulsion System	CASI
SCET	SpaceCraft Event Time	CASI
SCF	Scientific Computing Facility	Goddard
SCF	Science Computing Facility	CASI
SCF	Self Consistent Field	CASI
SCG	Science Coordinating Group	CASI
SCI	Sensitive Compartmented Information/Science	Goddard
SCIAMACHY	Scanning Imaging Absorption SpectroMeter for Atmospheric CHartographY	CASI
SCICEX	Scientific Ice Expeditions	Goddard
SCIGN	Southern California Integrated GPS Network	Goddard
SCISSAP	Southern Center for the Integrated Study of Secondary Air Pollutants	Goddard
SCLC	Space Charge Limitations of Currents	CASI
SCM	Shift Communication Manager	Goddard
SCM	Software Configuration Management	Goddard
SCM	System Control Module (Space Shuttle)	CASI
SCN	Specification Change Notice (NASA)	Langley
SCO	Subcarrier Oscillator (Biotelemetry instrumentation for Space	CASI
SCOLE	Spacecraft Control Laboratory Experiment	CASI
SCOMAC	Scientific Computing Operations, Maintenance and Communication	Langley
S'COOL	Students' Cloud Observations On Line	Langley
SCOPE	Scientific Committee on Problems of the Environment	Goddard
SCOPR	Systems Concept & Operations Plan Review	Goddard
SCORE	Satellite Cost Reduction System	Goddard
SCOSTEP	Scientific Committee on Solar-Terrestrial Physics	Langley
SCP	Spacecraft Processor	Goddard
SCP	Stored Command Processor	Goddard
SCP	Satellite Cloud Product	CASI
SCP	Sail Construction Platform (Solar Sails)	CASI
SCP	Self Consistent Phonon (Quantum mechanics approximation)	CASI
SCP	Sequential Linear Programming	CASI
SCP	Silica Cloth Phenol	CASI
SCP	Single Component Plasma	CASI
SCP	Standard Critical Point	CASI
SCP	Sutton Core Process (Airframe materials' fabrication)	CASI
SCPD	Satellite Committee for People with Disabilities	Langley
SCR	Schedule Confirmation Request (NCC)	Goddard
SCR	Software Change Request	Goddard
SCR	Strip Chart Recorder	Goddard
SCR	Surface-Contour RADAR	Langley
SCR	Systems Concept Review	Goddard
SCR	2. Selective Catalytic Reduction	CASI
SCR	3. Silicon Control Rectifier	CASI
SCR	4. Solar Cosmic Radiation	CASI
SCR	Selective Chopper Radiometer	CASI
SCRA	South Carolina Research Authority	Goddard
SCRAM	Space Capsule Regulator and Monitor (Raytheon)	CASI
SCRAM	Supersonic Combustion Ramjet	CASI
SCRAMJET	Supersonic Combustion Ramjet	CASI
SCRN	Spectra of Cosmic Ray Nuclei	CASI
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SCS	Satellite Control Section	Goddard
SCS	Science Commanding System	Goddard
SCS	Spacecraft Computer System	Goddard
SCS	Stored Command Sequence	Goddard
SCS	Sweep Control Sequence	CASI
SCSS	Scene Correcting Subsystem	CASI
SCSS	Supersonic Combustion Ramjet	CASI
SCT	Specifications and Contracts Team	Langley
SCTC	Space Communications Technology Center (Univ. Of Fla.)	CASI
SCU	Sequence Control Unit (Space Shuttle)	CASI
SCU	Signal Conditioning Unit	CASI
SCUBA	Submillimeter Common User Bolometer Array	Goddard
SCW	Single Command Write	Goddard
SCW	SuperCritical Wing	CASI
SD	Science Data	Goddard
SD	Software Development	Goddard
SD	Solar Diffuser	Goddard
SD	Standard Deviation	CASI
SDA	Solar Diffuser Assembly	Goddard
SDAC	Satellite Data Analysis Center	Langley
SDAC	Solar Data Analysis Center at GSFC	Goddard
SDAI	Standard Data Access Interface	Goddard
SDAS	Science Data Analysis Software	Goddard
SDB	Small Disadvantaged Business	Langley
SDBC	Small Disadvantaged Business Concern	Goddard
SDC	Standard Propulsion Components	Goddard
SDCI	Singles and Doubles Configuration Interaction (Quantum chemistry)	CASI
SDCS	SAR Data Catalog System	Goddard
SDCS	Simulation Data Conversion System (Space Flight Operations	CASI
SDD	Software Design Document	Goddard
SDD	Solar Diffuser Door	Goddard
SDF	Science Data Formatter	Goddard
SDF	Software Development Facility	Goddard
SDF	Software Development Folder	Goddard
SDH	Standard Data Header	Goddard
SDI	Selective Dissemination of Information	CASI
SDI	Science Data Interface	Goddard
SDI	Strategic Defense Initative	CASI
SDIMU	Strap Down Inertial Measuring Unit (See also IMU)	CASI
SDIO	Strategic Defense Initiative Organization	CASI
SDIP	SOGS/DADS Interface Processor	Goddard
SDL	Space Dynamics Laboratory	Goddard
SDL	Standard Distribution List (NASA)	Langley
SDL	Systems Development Laboratory, JPL	CASI
SDLC	Software Development Life Cycle	Goddard
SDLF	Shaft Driven Lift Fan	CASI
SDLV	Shuttle Derived Launch Vehicle	CASI
SDM	Secondary Deployment Mechanism	Goddard
SDMS	Standard Database Management System	CASI
SDN	Schedule Deletion Notification (NCC—MPT Message)	Goddard
SDO	Solar Dynamics Observatory	Goddard
SDP	Safety Data Package	Goddard
SDP	Science Data Processing	Goddard
SDP	System Definition Phase	Goddard
SDP	Site Data Processor	CASI
SDP	Standard Data Processor	CASI
SDPC	Science Data Processing Computer	Goddard
SDPF	Science Data Processing Facility	Goddard
SDPF	Sensor Data Processing Facility	Goddard
SDPS	Science Data Processing Segment (ECS)	Goddard
		back to top
SDR	Single Design Review	Goddard
SDR	Software Discrepancy Report	Goddard
SDR	System Design Review	Goddard
SDR	Systems Design Review (NASA)	Langley
SDRI	Science Data Ready Indicator	Goddard
SDS	Science Data Store	Goddard
SDSF	System Display and Search Facility (IBM)	Goddard
SDSM	Solar Diffuser Stability Monitor	Goddard
SDSS	Sloan Digital Sky Survey	Goddard
SDST	Small Deep Space Transponder	Goddard
SDTN	Space and Data Tracking Network	CASI
SDTV	Structural Dynamics Test Vehicle	Goddard
SDU	Signal Distribution Unit	Goddard
SDU	Software Development Unit	Goddard
SDV	Software Development and Validation	Goddard
SDV	Shuttle Derived Vehicle	CASI
SDVF	Software Development and Validation Facility	Goddard
SDWT	Self-Directed Work Teams	Langley
SE	Single Event	Goddard
SE	System Engineer	Goddard
SE	System Engineering	Goddard
SE	Storage Element	CASI
SE	Student Experiment	CASI
SE	Systems Engineering	CASI
SE&I	Systems Engineering and Integration	Langley
SE&I	System Engineering & Integration	CASI
SEA	Scientist's Expert Assistant	Goddard
SEA	Support Electronics Assembly	Goddard
SEA	Sudden Enhancement of Atmospherics	CASI
SEADS	Shuttle Entry Air Data System	CASI
SEAL	Software Engineering and Ada Lab	Langley
SEAMAP	Scientific Exploration and Mapping Program	CASI
SEAS	Systems Engineering and Analysis Support	Goddard
Seasat	Sea Satellite (NASA)	Langley
SEASAT	Specialized Experimental Applications Satellite	CASI
SeaWIFS	Sea-Viewing Wide-Field Sensor	Goddard
SeaWiFS	Sea-Viewing Wide Field-of-View Sensor	Goddard
SEB	Single Event Burn-out	Goddard
SEB	Source Evaluation Board	Goddard
SEB	Systems Engineering Board	Goddard
SEBAL	Surface Energy Balance	Goddard
SEBASS	Spatially Enhanced Broadband Array Spectrograph System	CASI
		back to top
SEC	second	Langley
SEC	Source Evaluation Committee (NASA)	Langley
SEC	Sun Earth Connection	Goddard
SEC	Secondary Electron Conduction	CASI
SECANT	Separation and Control of Aircraft using Nonsynchronous Techniques	CASI
SECDEC	Single Error Correction Double Error Code	Goddard
SECDED	Single-bit Error Correction with Double-bit Error Detection	Goddard
SECO	Second Engine cut Off	Goddard
SECO	Secondary Electron Conduction Orthicon	Goddard
SECOR	Sequential Collation of Range Satellite	CASI
SED	Systems Engineering Division	Goddard
SED	Spectral Energy Distribution	CASI
SEDA	Secondary Electron Detector Assembly	CASI
SEDAC	Socio-Economic Data and Applications Center (CIESIN)	Goddard
SEDS	SC4 Enhancement and Discrepancy System	Goddard
SEDS	Space Electronics Design Standards	Goddard
SEDS	Standard Enhancement and Discrepancy System	Goddard
SEDS	Small Expendable Deployer System	CASI
SEDS/EME	Small Expendable Deployer System/End Mass Experiment	Langley
SEE	Single Event Effects	Goddard
SEE	Space Environment and Effects	Langley
SEE	Space Exploration Engineering	Goddard
SEE	Spectrometer for Energetic Electrons	Langley
SEED	Self Electrooptic Effect Device (from Bell Labs.)	CASI
SEEDS	Space Exposed Experiment Developed for Students	CASI
SEER	Systems Engineering and Evaluation Room	Goddard
SEER	Support Engineering Evaluation Room	Goddard
SEF	Sustaining Engineering Facility	Goddard
SEGR	Single Event Gate Rupture	Goddard
SEGway	Science Education Gateway	Goddard
SEI	Solar Energy International	Langley
SEI	Software Engineering Institute (DoD)	CASI
SEI	Space Exploration Initiative	CASI
SEID	Systems Engineering and Integration Division	Goddard
SEID	Service Element Identification	Goddard
		back to top
SEL	Single Event Latch-up	Goddard
SEL	Software Engineering Laboratory (UMD)	Goddard
SELF	Solar Electric Light Fund	Langley
SELSIS	Space Environment Laboratory Solar Imaging System	CASI
SELV	Small Expendable Launch Vehicle	Goddard
SELVS	Small Expendable Launch Vehicle Services	Goddard
SEM	Scanning Electron Microscope (or Micrograph)	CASI
SEM	Space Environment Monitor	CASI
SEM	Standard Electronic Module	CASI
SEM	Storm Electrification Model	CASI
SEMM	Solar Electric Multimission Spacecraft	CASI
SEMO	Supply & Equipment Management Officer	Langley
SEMOS	Space Environment Monitoring System	CASI
SEMPA	Scanning Electron Microscope and Particle Analyzer	CASI
SEO	Synchronous Equatorial Orbiter	CASI
SEOCS	Sun Earth Observatory and Climatology Satellite	CASI
SEOS	Synchronous Earth Observatory Satellite	CASI
SEP	Senior Executive Program	Goddard
SEP	Solar Energetic Participle	Goddard
SEP	Systems Engineering Plan	Goddard
SEP	Solar Energetic Particles	CASI
SEP	Solar Electric Propulsion	CASI
SEP	Strain Energy Partitioning	CASI
SEP	Surface Electrical Properties	CASI
SEPAC	Space Experiment with Particle Accelerators (payload)	CASI
SEPEX	Shuttle Exhaust Particle Experiment	Langley
SEQUAL	Seasonal Response of the Equatorial Atlantic	CASI
SER	Systems Engineering Report	Goddard
SERIES	Satellite Emission Range Infrared Earth Survey	CASI
SERN	Single Expansion Ramp Nozzle (An aircraft engine exhaust nozzle)	CASI
SERS	Spacecraft Emergency Response System	Goddard
SERT	Space Electric Rocket Test	CASI
SERT	Spinning Satellite for Electric Rocket Test	CASI
SERTS	Solar Extreme-UV Rocket Telescope Spectrograph	Goddard
SERTS	Solar Extreme Ultraviolet Telescope and Spectrograph	CASI
SES	Senior Executive Service	Goddard
SES	Space Environmental Simulator	Goddard
SES	Support Electronics Section	Goddard
SES	Support Electronics Subsystem	Goddard
SES	Stirling Engine System	CASI
SES	Suffield Experimental Station (Canada)	CASI
SESAAS	Sustaining Engineering Support for Agency wide Administrative Systems	Goddard
SESAC	Space and Earth Sciences Advisory Committee	CASI
SESAME	Second European Stratospheric Arctic and Mid-Latitude Experiment	Goddard
SESAME	Severe Environmental Storm and Mesoscale Experiment	CASI
SESCDP	Senior Executive Service Candidate Development Program	Goddard
SET	Senior Engineering Team	Langley
SET	Space Environment Testbeds	Goddard
SET Program	Solar Energy Thermionic Program	CASI
SETA	Satellite Electrostatic Triaxial Accelerometer	Goddard
SETI	Search for Extraterrestrial Intelligence	CASI
SETS	Solar Electric Test Satellite	CASI
SETS	Solar Energy Thermionic Conversion System (NASA)	CASI
SETS	Stereo Electrooptical Tracking System	CASI
SEU	Structure and Evolution of the Universe	Goddard
SEU	Single Event Upset	CASI
SEWP	Scientific and Engineering Workstation Procurement	Goddard
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SF	Standard Form	CASI
SFA	Single Frequency Approach	CASI
SFDU	Standard Formatted Data Unit	CASI
SFE	Space Frequency Equivalence	CASI
SFFT	Short Form Functional Test	Goddard
SFHe	Super fluid Helium	CASI

SFIR	Sequential Filter Imaging Radiometer	CASI
SFM	Spacecraft Fault Management	Goddard
SFM	System Fault Manager	Goddard
SFMD	Storable Fluid Management Demonstration	CASI
SFO	Simulated Flameout	CASI
SFOC	Space Flight Operations Contract	Goddard
SFOF	Space Flight Operations Facility	CASI
SFP	Single Failure Point (Space Shuttle)	CASI
SFP	Space Flight Participant (A Shuttle crew member whose presence is not required for operation of payloads or mission unique activities)	CASI
SFR	Spatial Frequency Response	CASI
SFR	Spectral FEG Resequencing	CASI
SFR	Spin Flip Raman (laser)	CASI
SFR	Star Formation Rate	CASI
SFR	Star Formation Region	CASI
SFR	Step Frequency Radar	CASI
SFS	Star Field Simulator	Goddard
SFT	Short Functional Test	Goddard
SFURET	Space Flyer Unit Retrieval	CASI
S-G	Space to Ground	Goddard
SGDR	Sensor Geophysical Data Record	Goddard
SGEMP	System Generated Electro Magnetic Pulse program	CASI
SGG	Superconducting Gravity Gradiometer	Goddard
SGGE	Superconducting Gravity Gradiometer Experiment	Goddard
SGGM	SGG Mission	Goddard
SGI	Silicon Graphics, Inc.	Goddard
SGLT	Space-Ground Link Terminal	Goddard
SGML	Standard Generalized Markup Language (an ISO standard)	CASI
SGP	Southern Great Plains	Goddard
SGR	Soft Gamma-ray Repeaters	Goddard
SGR	Sodium Graphite Reactor	CASI
SGS	Syalbard Ground Station	Goddard
SGSE	Spacecraft Ground Support Equipment	Goddard
SHARC	Submillimeter High Angular Resolution Camera	Goddard
SHARE	Space Station Heat Pipe Advanced Radiator Element	CASI
SHARP	Summer High School Apprentice Research Program	Langley
SHARP	Summer High School Apprenticeship Research Program	Goddard
SHEAL	Shuttle High Energy Astrophysics Laboratory	CASI
SHEBA	Surface Heat Budget in the Arctic Ocean	Goddard
SHELS	Shuttle Hitchhiker Ejectable Launch System	Goddard
SHF	Super High Frequency	CASI
SHI	Sumitomo Heavy Industries	Goddard
SHIP	Simplified Helmholtz Integral Program	CASI
SHIS	Scanning High resolution Interferometer Sounder	CASI
SHM	Safehold Mode	Goddard
SHM	Shutter Mechanism	Goddard
SHM	Solar Helium Magnetometer	Goddard
SHO	Service Schedule Order [SN]	Goddard
SHOOT	Super fluid Helium On-Orbit Transfer	CASI
SHP	Standard Header Packet	Goddard
SHP	Sub harmonically Pumped	Goddard
SHS	Spatial Heterodyne Spectrometer	Goddard
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SI	Science Instrument	Goddard
SI	Scientific Instrument	Goddard
SI	Systeme Internationale	Goddard
SI	International System of Units	CASI
SI	Solar Inertial	CASI
SI C&DH	SI Command and Data Handling	Goddard
SI C&DH	SI Control and Data Handling	Goddard
SI/PLSIM	SI/Payload Simulator	Goddard
SIAM	Society for Industrial and Applied Mathematics	Langley
SIAM	Self Initiated Antiaircraft Missiles	CASI
SIB	Simple Biosphere Model	Goddard
SIB	Simple Biosphere	CASI
SIC	Spacecraft Identification Code (NCC Scheduling)	Goddard
SIC	Structural Influence Coefficient	CASI
SICADS	SI Control and Data Simulator Systems	Goddard
SICI	Standard Individual Contribution Identifier (Consists of ISSN, vol., iss., first p. in journal, indication of author)	CASI
SICM	Scientific Instrument Cost Model	Goddard
SID	Society for Information Display	Langley
SID	Standard Instrument Departures (RADAR) (Aviation)	Langley
SID	System Interface Document	Goddard
SID	Standard Instrument Departure	CASI
SID	Sudden Ionospheric Disturbance	CASI
SIF	Scientific Instrument Formatter	Goddard
SIF	SOGS Integration Facility	Goddard
SIFIG	Science Instrument Fine Guidance System Ground Support Equipment	Goddard
SIFT	Software Implemented Fault Tolerance (NASA)	Langley
SIFT	System Identification from Tracking	CASI
SIG	System Integration Group	Goddard
SIGGRAPH	ACM Special Interest Group on Graphics	Goddard
SIGI	System for Interactive Guidance and Information	CASI
SIGINT	SIGnal INTelligence	CASI
SIGMA	A Russian Satellite	Goddard
SIH	System for Hydrometeorological Information (Brazil)	CASI
SII	Space Industries, Inc.	CASI
SIIA	Software and Information Industry Association	CASI
SIIS	Spacecraft/Instrument Interface Simulator	Goddard
SIL	Space Innovations Limited	Goddard
SIL	Speech Interference Level	CASI
SILTS	Shuttle Infrared Lee side Temperature Sensing	CASI
SIM	Spectral Irradiance Monitor	Goddard
SIM	Scientific Instrument Module (Lunar Satellite Apollo 15)	CASI
SIM	Space Interferometry Mission	CASI
SIMA	Small Incremental Motion Actuator (OTA)	Goddard
SIMBIOS	Sensor Intercomparison and Merger for Biological and Interdisciplinary Oceanic Studies	Goddard
SIMD	Single Instruction Stream/Multiple Data	CASI
SIMICOR	Simultaneous Image Correlation	CASI
SIMIP	Sea Ice Model Intercomparison Project	Goddard
SIMS	Secondary Ion Mass Spectrometry	CASI
SINDA	Systems Improved Numerical Differencing Analyzer	Goddard
SINDA/FLUINT	System Improved Numerical Differencing Thermal Analyzer with Fluid Integrator	Goddard
SINQ	Swiss Spallation Neutron Source	CASI
SIO	Serial Input/Output	Goddard
SIP	Shuttle Interface Panel	Goddard
SIP	SOGS Invocable Procedure	Goddard
SIP	Standard Interface Panel	Goddard
SIP	Subsystem Implementation Plan	Goddard
SIP	System Implementation Plan	Goddard
SIP	Satellite Interceptor Program	CASI
SIPE	Scientific Instrument Protective Enclosure	Goddard
SIPS	Science Investigator-led Processing System	Goddard
SIR	Spaceborne Imaging RADAR	Langley
SIR	Supplier Information Request	Goddard
SIR	Shuttle Imaging Radar	CASI
SIR	Spaceborne Imaging Radars (series)	CASI
SIRB	Science Interface Relay Box	Goddard
SIRC	Shuttle Imaging RadarC	CASI
SIR-C	Shuttle Imaging Radar-C	Goddard
SIRD	System Interface Requirements Document	Goddard
SIRD	Support Instrumentation Requirements Document	CASI
SIRE	Spectral and Photometric Imaging Receiver	Goddard
SIREN capsule	Sanders Intact Reentry Encapsulation	CASI
SIRS	Satellite Infrared Spectrometer	CASI
SIRTF	Shuttle Infrared Telescope Facility	CASI
SIRTF	Space Infrared Telescope Facility	CASI
SIRTF	Space Infrared Telescope	Goddard
SIRU	Space Inertial Reference Unit	Goddard
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SIS	Spacecraft Interface Simulator	Goddard
SIS	Stay-in-School Program	Goddard
SIS	Simulation Induced Sickness	CASI
SIS	Single Interceptor Satellite	CASI
SIS	Superconductor Insulator Superconductor	CASI
SISD	Software and Information Systems Division	Goddard
SISE	SI Systems Engineer	Goddard
SISEX	Shuttle Imaging Spectrometer Experiment	CASI
SIT	Select in Test	Goddard
SIT	System Implementation Team	Goddard
SIT	Satellite Inspector Target	CASI
SIT	Secondary Instability Theory	CASI
SITE	Satellite Instructional Television Experiment	CASI
SITS	Science Instrument Test System	Goddard
SITS	Science Instrument Test Set	Goddard
SITUPS	Spatial Integrity Thresholding of Urban Polygons	Goddard
SIU	SOGS Interface Unit	Goddard
SIVB	(Or SIVB. Designates the third Stage (IVB) of the Saturn Launch	CASI
SIWG	Science Instrument Working Group	Goddard
SL	Scan Line	Goddard
SL	Sick Leave	Goddard
SLA	Service Level Agreement	Goddard
SLA	Shuttle Laser Altimeter	Goddard
SLAC	Space lab Lyman Alpha Coronograph	CASI
SLAC	Stanford Linear Accelerator Center	CASI
SLAM	Satellite Link Attenuation Model	CASI
SLAM	Scanning Laser Acoustic Microscope	CASI
SLAM	SHF Link Analysis Model	CASI
SLAM	Simulation Language for Analogue Modeling	CASI
SLAM	SLantpath Absorption Model	CASI
SLAM	Standoff Land Attack Missile	CASI
SLAM	Statistical Linearization Adjoint Method	CASI
SLAM	Supersonic Low Altitude Missile	CASI
SLAR	Side Looking Airborne Radar	CASI
SLBM	Space Launched Ballistic Missile	CASI
SLBM	Submarine Launched Ballistic Missile	CASI
SLC	Space Launch Complex	Goddard
SLC	Shuttle Launch Complex (VAFB)	CASI
SLD	Scattering Length Density	CASI
SLD	SLAC Large Detector	CASI
SLD	Super luminescent Diode	CASI
SLDPF	Space Lab Data Processing Facility	Goddard
SLE	Space Link Extension	Goddard
SLEEC	Shingle Lap Extendible Exit Cone	CASI
SLI	Space Launch Initiative	CASI
SLM	Single Longitudinal Mode (Lasers)	CASI
SLM	Spatial Light Modulator	CASI
SLOC	Source Line of Code	Goddard
SLOC	Source Lines of Code	CASI
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SLR	Satellite Laser Ranging	CASI
SLR	Side Looking Radar	CASI
SLS	Submillimeter Limb Sounder	Goddard
SLS	Space Life Sciences Laboratory	CASI
SLS1	Spacelab Life Sciences One	CASI
SLSIR	Stanford Lockheed Institute for Space Research	Goddard
SLSTP	Space Life Sciences Training Program	CASI
SLTE	System Level Test Equipment	Goddard
SLTP	System Level Test Procedure	Goddard
SLV	Standard Launch Vehicle	CASI
SM	Secondary Mirror	Goddard
SM	Serial Magnitude	Goddard
SM	Servicing Mission	Goddard
SM	Specification Manual	Goddard
SM	Structural Model	Goddard
SM	Service Module	CASI
SM	Systems Management	CASI
SM/PART	Servicing Mission/Planning and Replanning Tool	Goddard
SM2	HST Servicing Mission 2	Goddard
SM3A	HST Servicing Mission 3A	Goddard
SM3B	HST Servicing Mission 3B	Goddard
SM4	HST Servicing Mission 4	Goddard
SMA	S-Band Multiple Access	Goddard

SMA	Secondary Mirror Assembly (OTA)	Goddard
SMA	Shape Memory Alloy	CASI
SMA	Sub-Miniature “A”	Goddard
SMAF	S-Band Multiple Access Forward	Goddard
SMAP	Software Management Assurance Program	Langley
SMAR	S-Band Multiple Access Return	Goddard
SMARR	Safety and Mission Assurance Readiness Review	CASI
SMART	Solid Modeling Aerospace Research Tool	Langley
SMB	Systems Management Board	Goddard
SMC	Safe Mode Command	Goddard
SMC	Senior Management Council	Langley
SMC	Serial Magnitude Command	Goddard
SMC	Small Magellanic Cloud	Goddard
SMC	System Management Center	CASI
SMCC	Shuttle Mission Control Center	Goddard
SMD	Standardized Manufactured Devise	Goddard
SMD	Standardized Manufacturing Drawing	Goddard
SMD	Sauter Mean Diameter (Particles)	CASI
SMDB	Servicing Mission Data Base	Goddard
SME	Shape Metal Effect	CASI
SME	Solar Mesosphere Explorer	CASI
SMEA	Safe Mode Electronics Assembly	Goddard
SMEAT	Skylab Medical Experiments Altitude Test	CASI
SMEB	SLC Main Electronics Box	Goddard
SMEL	Servicing Mission Equipment List	Goddard
SMEX	Small Class Explorer	CASI
SMEX	Small Explorer	Goddard
SMF	Space Medical Facility	CASI
SMGT	Servicing Mission Ground Test	Goddard
SMILI	Super conducting Magnet for Investigation of Light Isotopes	Goddard
SMIT	Servicing Mission Integrated Timeline	Goddard
SMM	Servicing Mission Manager	Goddard
SMM	Solar Maximum Mission (Program using Earth Observatory Satellite)	CASI
SMMC	Systems Maintenance and Monitoring Console	CASI
SMMR	Scanning Multichannel (or Multifrequency) Microwave Radiometer	CASI
SMN	Software Modification Notice	Goddard
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SMO	Systems Management Office	Goddard
SMOC	Science and Mission Operations Center	Goddard
SMOV	Science Mission Ortibal Verification	Goddard
SMOV	Servicing Mission Observatory Verification	Goddard
SMOW	Standard Mean Ocean Water	CASI
SMOWG	Servicing Mission Operations Working Group	Goddard
SMP	Software Management Plan	Goddard
SMRD	Spin Motor Rotation Detector	CASI
SMRM	Solar Maximum Repair Mission	CASI
SMS	Safety Management System	Goddard
SMS	Science Mission Specification	Goddard
SMS	Space Management System	Goddard
SMS	Space Mission Simulator	Goddard
SMS	Structures and Mechanisms Subsystem (AM-l)	Goddard
SMS	Synchronous Meteorological Satellite	CASI
SMSS	Soil Mechanics Surface Sampler	CASI
SMT	Surface Mount Technology	CASI
SMTP	Simple Mail Transport Protocol	CASI
SMTRB	Ship and Marine Technology Research Board (United Kingdom)	CASI
SMTS	Space Missile Tracking System	Goddard
SMU	Space Self Maneuvering Unit	CASI
SMV	Science Museum of Virginia	Goddard
SMVGEAR	Sparse-Matrix Vectorized Gear Code	Goddard
SMY	Solar Maximum Year	CASI
SN	Signal/Noise	Goddard
SN	Space Network	Goddard
SN	Supernova	CASI
SN	Signal to Noise ratio	CASI
SN	Succinonitrile	CASI
SN	Superconducting Normally conducting	CASI
SNA	System Network Architecture	Langley
SNAP	Structural Network Analysis Program	Goddard
SNAP	System for Nuclear Auxiliary Power Program	CASI
SNECMA	Societe Nationale d’Etude et de Construction de Moteurs d’Aviation, Paris (France)	CASI
SNG	Synthetic Natural Gas	CASI
SNIF	SASS Near field Interaction Flights	CASI
SNIF	Slow Non-Isothermal Flows	CASI
SNIP	SN Interoperability Program	Goddard
SNOE	Student Nitric Oxide Explorer	Goddard
SNORT	Supersonic Naval Ordance Research Track	CASI
SNPP	Standard NASA Payroll and Personnel System	Langley
SNR	Super Nova Remnant	Goddard
SNR	Signal to Noise Ratio	CASI
SNS	Supercomputing Network Subsystem	Langley
SOAC	Satellite Ozone Analysis Center	CASI
SOAC	State of the art Car	CASI
SOAC	Systems on a Chip	CASI
SOAP	Spectrometric Oil Analysis Program	CASI
SOAP	Systems/Operations Analysis of Programs	CASI
SOAR	Spacecraft Orbital Anomaly Report	Goddard
SOAR	Space Orbiting Advanced Fusion Power Reactor	CASI
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SOC	Science Operations Center	Goddard
SOC	Science Oversight Committee	Goddard
SOC	Simulation Operations Center	Goddard
SOC	State-of-Charge	Goddard
SOC	Space Operations Center (Manned Orbital Space Station)	CASI
SOCC	Satellite Operations Control Center	Goddard
SOCC	Simulations Operations Control Center	Goddard
SOCCER	Sample Of Comet Coma Earth Return	CASI
SOCM	Stand Off Clustered Munition (Missile)	CASI
SODA	Spacecraft Orbit Design and Analysis	Langley
SODA	Space Operations Directive Agreement	Goddard
SODAR	Sound Detection and Ranging	CASI
SODR	Space flight Optical Disk Recorder	Langley
SOEP	Solar Oriented Experiment Package	CASI
SOFA	Selectable Optical Filter Assembly	Goddard
SOFIA	Stratospheric Observatory For Infrared Astronomy	CASI
SOGS	Science Operations Ground Station	Goddard
SOH	State of Health	Goddard
SOHO	Solar and Heliospheric Observatory	CASI
SOI	Silicon on Insulator	Langley
SOI	Solar Oscillations Investigation	Goddard
SOI	Solar Oscillations Imagery (Experiment)	CASI
SOI	Spinscan Ozone Imager	CASI
SOLAS	Surface Ocean Lower Atmosphere Study	Goddard
SOLCON	Solar Constant Experiment	Goddard
SOLCON	SOLar CONstant measurement	CASI
SOLIS	SC4 On-line Information Service	Goddard
SOLSPEC	SOLar SPECtrum measurement	CASI
SOLSTICE	Solar Stellar Irradiance Comparison Experiment	Goddard
SOMA	Support Optomechanical Assembly	Goddard
SOMO	Space Operations Management Office	Goddard
SOMO	Space Operations Management Organization	Goddard
SONET	Synchronous Optical Network	Goddard
SONEX	Subsonic assessment (SASS) Ozone and Nitrogen oxide EXperiment	CASI
SOON	USAF’s Solar Optical Observing Network	Goddard
SOON	Solar Observing Optical Network	CASI
SOOS	Stacked OSCAR On Scout (Two OSCAR Satellites)	CASI
SOP	Standard (or Standing) Operating Procedure	Langley
SOP	Start of Packet	Goddard
SOP	Standard Operating Procedures	CASI
SOPE	Small Orbital Replacement Unit Protective Enclosure	Goddard
SOR	Successive Over Relaxation (mathematics)	CASI
SORBET	Simulation of Rotor Blade Element Turbulence	CASI
SORCE	Solar Radiation and Climate Experiment	Goddard
SORD	System and Operations Requirements Document	Goddard
SORT	Software Optimization and Reuse Technology	Langley
SORTE	Shuttle Orbiter Radar Test and Evaluation	CASI
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SOS	Southern Oxidants Study	Goddard
SOS	Silicon On Sapphire	CASI
SOS	Space Operations Simulator	CASI
SOS	Standing Order Service	CASI
SOT	Science Operations Time	Goddard
SOT	Solar Optical Telescope	CASI
SOTA	Special Operations and Test Area	Goddard
SOTA	Special Operations and Training Area	Goddard
SOTA	State of the Art	Goddard
SOTP	Saturn Orbiter/Titan Probe	CASI
SOUP	Solar Optical Universal Polarimeter	CASI
SOUP	Spectrum Orbit Utilization Program	CASI
SOW	Suspension of Work	Langley
SOW	Statement of Work	CASI
SP	NSA’s Sacramento Peak Observatory	Goddard
SP	Salt Pill	Goddard
SP	Special Publication	CASI
SP	Systems Procedures	Goddard
SP&I/O	Sensor Processing and I/O Electronics	Goddard
SP&OD	Suborbital Projects and Operations Directorate	Goddard
SPA	Solar Panel Assembly	Goddard
SPACE	Satellite Precipitation and Cloud Experiment	CASI
SPACE	Spacecraft Prelaunch Automatic Checkout Equipment	CASI
SPADATS	Space Detection and Tracking System	CASI
SPADE	Sparta Acquisition Digital Equipment	CASI
SPADVOS	Spaceborne Direct Viewing Optical System	CASI
SPAM	Scanning Photo Acoustic Microscopy	CASI
SPAN	Solar Particle Alert Network	Goddard
SPAN	Solar Physics Analysis Network	Goddard
SPAN	Space Physics Analysis Network	CASI
SPAN	Space Plasma Analysis Network	CASI
SPAP	Special Payloads Adaptive Processor	Goddard
SPAR	Standard Payload Assurance Requirements	Goddard
SPAR	Space Power Advanced Reactor Program (Los Alamos)	CASI
SPAR	Space Processing Applications Rocket	CASI
SPAR	Structural Performance Analysis and Redesign	CASI
SPARC	Slant Path Atmospheric Refraction Calibrator	CASI
SPARC	Spectral Analysis and Recognition Computer	CASI
SPARCLE	SPaceborne Aerosol and Cloud LIDAR Earth probe	Langley
SPARTAN	Shuttle Pointed Autonomous Research Tool for Astronomy	CASI
SPAS	Shuttle Pallet Satellite	CASI
SPASIM	SPAcecraft SIMulator	CASI
SPATEL	Space Telescope Reliability Model	Goddard
SPB/DB	Super plastic Forming/Diffusion Bonding	CASI
SPC	Scientific Program Committee	Goddard
SPC	Signal Processing Center (DSN)	Goddard
SPC	Standard Propulsion Components	Goddard
SPC	Stored Program Command	Goddard
SPCR	Software Problems/Change Report	Goddard
SPCU	Starboard Power Conditioning Unit	Goddard
SPCZ	South Pacific Convergence Zone	Goddard
SPD	Science Programs Division	Goddard
SPDE	Solar Plasma Diagnostic Experiment	Goddard
SPDL	Structured Program Design Language	CASI
SPE	Sensor Processing Electronics	Goddard
SPE	Spacecraft Power Electronics	Goddard
SPE	Solar Particle Event	CASI
SPE	Solid Polymer Electrolyte	CASI
SPEC	NASA Product Specification	Langley
SPECS	Submillimeter Probe of the Evolution of Cosmic Structure	Goddard
SPECSER	Special Series	CASI
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SPF	Single Point Failure	CASI
SPF	Space Power Facility	CASI
SPF	Specific Pathogen Free	CASI
SPG	Single Point Ground	Goddard
SPG	Sinusoidal Pressure Generator	CASI
SPHA	Self Paced Heat Acclimation	CASI
SPI	Schedule Performance Index	Langley
SPI	Science Program Implementation	Goddard
SPI	Spectrometer on Integral	Goddard
SPI	Surface Position Indicator (Space Shuttle)	CASI
SPI-CAM	Spectrograph Infrared Camera	Goddard
SPIE	Society for Photo-Optical Instrumentation Engineers	Goddard
SPIE	Society of Photo-Optical Instrumentation Engineers	Langley
SPIE	The International Society for Optical Engineering	CASI
SPIF	Shuttle POCC Interface Facility	Goddard
SPIFR	Single Pilot Instrument Flight Rules	CASI
SPIKE	Science Planning Interactive Knowledge Environment	Goddard
SPIP	Solid Propulsion Integrity Program	Langley
SPIRITS	Spectral and In band Radiometric Imaging of Targets and Scenes	CASI
SPL	Split Phase Level	Goddard
SPL	Solar Pumped Laser	CASI
SPL	Sound Pressure Level (Dynes/cm2; acoustic unit of measure)	CASI
SPlFl	South Pole Interferometer lmager	Goddard
SPM	Sun Pointing Mode	Goddard
SPM	Solar Proton Monitor	CASI
SPO	Sponsored Projects Officer	Goddard
SPO	Sacramento Peak Observatory,Sunspot, NM	CASI
SPO	Solar Polar Orbitor	CASI
SPOC	Science Planning and Operations Center	Goddard
SPOC	Shuttle Payload of Opportunity Carrier	Goddard
SPOD	Suborbital Projects & Operations Directorate	Goddard
SPOF	ISTP Science Planning and Operations Facility	Goddard
SPOT	French Space Agency Satellite	Langley
SPOT	Systeme pour l’observation de la Terre (France)	Goddard
SPOT	Speed Position and Track (Synchronous navigation Satellite)	CASI
SPOT	System Probatoire d'Observation de la terre	CASI
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SPP	Solar Pumped Plasma	CASI
SPR	Software Problem Report	Goddard
SPS	Signal Processing Subsystem	Goddard
SPS	Single Point Solution	Goddard
SPS	Small Purchase System	Goddard
SPS	Satellite Power System	CASI
SPS	Solar Power Satellites	CASI
SPSR	Service Planning Segment Replacement	Goddard
SPSS	Science Planning and Scheduling System	Goddard
SPT	Special Performance Test	Goddard
SPTN	Shuttle Pointed Autonomous Research Tool for Astronomy	CASI
SPTR	South Pole TDRS Relay	Goddard
SPUD	Superconducting Pop-Up Detector	Goddard
SPUR	Space Power Unit Reactor	CASI
SPURT	Spinning Unguided Rocket Trajectory	CASI
SQA	Software Quality Assurance	Goddard
SQL	Structured Query Language	CASI
SQMS	Software Quality Management System	Goddard
SQPN	Staggered Quadra Pseudo-Random Noise	Goddard
SQPSK	Staggered Quadra Phase Shift Keying	Goddard
SQUID	Superconducting Quantum Interference Device	Goddard
SQUID	Superconducting Quantum Interference Detectors	CASI
SR	Schedule Result (NCC--MPT Message)	Goddard
SR	Service Request	Goddard
SR	Status Register (Computer science)	Langley
SR	Strehl Ratio	Goddard
SR	Support Requirements	Goddard
SR	Saturable Core Reactor	CASI
SR	Scanning Radiometer	CASI
SR&QA	Safety, Reliability, and Quality Assurance	Goddard
SR&T	Supporting Research and Technology	Goddard
SRA	Slip Ring Assembly	Goddard
SRA	Spherical Radiation Absorber	CASI
SRAM	Static Random Access Memory	Goddard
SRB	Global Surface Radiation Budget Satellite	Langley
SRB	Service Request Bit	Goddard
SRB	Surface Radiation Budget	Goddard
SRB	System Review Board	Goddard
SRB	Solid Rocket Booster (Space Shuttle)	CASI
SRBEX	Susquehanna River Basin Experiment	Goddard
SRC	Secondary Reference Cube	Goddard
SRCA	Spectro-Radiometric Calibration Assembly	Goddard
SRD	Science Requirements Document	Goddard
SRD	Software Requirements Document	Goddard
SRD	System Requirements Document	Goddard
SRDE	Signals Research and Development Establishment (Great Britain)	CASI
SRE	SQUID Readout Electronics	Goddard
SRE	Sodium Reactor Experiment	CASI
SRF	Shield Replacement Fabric	Goddard
SRF	Superconducting Radar Frequency	CASI
SRFCS	Self Repairing Flight Control System	Langley
SRIXE	Synchrotron Radiation Induced X-ray Emission	CASI
SRL	Space Radar Laboratory	CASI
SRM	Solid Rocket Motor	Goddard
SRM	Systems for Resources Management	Goddard
SRM	Systems Review Manager	Goddard
SRM	Safety, Reliability, and Maintainability	CASI
SRM&QA	Safety, Reliability, Maintainability, and Quality Assurance (NASA)	Langley
		back to top
SRO	Standing Room Only	Goddard
SRO	Systems Review Office	Goddard
SRO	Savannah River Operation Office AEC	CASI
SRON	Space Research Organization Netherlands	Goddard
SRP	Savannah River Plant	CASI
SRP	Short Range Plan	CASI
SRP	Single Rotating Propeller	CASI
SRP	Spreading Resistance Profilometry	CASI
SRP	Standard Repair Procedure	Goddard
SRP	Strain Range (or Strain range) Partitioning	CASI
SRP	Systems Review Program	Goddard
SRR	Software Requirements Review	Goddard
SRR	System Requirements Review	Goddard
SRR	Systems Requirements Review	CASI
SRS	Segmented Rail Surface	CASI
SRS	Self Replicating Systems	CASI
SRS	Shock induced Reaction Synthesis	CASI
SRS	Software Requirements Specification	CASI
SRS	Southern Reference Stars	CASI
SRS	Stellar Radiation Sensor	CASI
SRS	Stimulated Raman Scattering	CASI
SRS	Strontium Sulfides	CASI
SRSO	Spacecraft and Remote Sensing Office	Langley
SRSV	Satellite Robot Simulator Vehicle	CASI
SRT	Safety Review Team	Goddard
SRT	Silicon Resistance Thermometer	Goddard
SRTM	Shuttle Radar Topographic Mission	CASI
SS	Stainless Steel	Goddard
SS	Support Software	Goddard
SS	Systems Simulator	Goddard
S-S	Space to Space	Goddard
SS	Space Station	CASI
SS/L	Space Systems/Loral	Goddard
SSA	S-band Single Access	Goddard
SSA	Space Suit Assembly	CASI
SSAF	S-band Single Access Forward	Goddard

SSAI	Science Systems and Applications, Inc.	CASI
SSAIA	Source Selection Acquisition Improvement Award	Langley
SSALT	Solid State Altimeter	Goddard
SSALTO	Segment Sol Multimission Altimetry and Orbitography	Goddard
SSAR	S-band Single Access Return	Goddard
SSAT	S-band Signal Access Transmitter	Goddard
SSB	Single Side band	CASI
SSBD	Shaped Sonic Boom Demonstration	CASI
SSBUV	Shuttle Solar Backscatter Ultraviolet Instrument	Langley
SSBUV	Shuttle Solar Backscatter Ultraviolet	CASI
SSC	Science Support Center	Goddard
SSC	Stennis Space Center (Stennis Space Center, MS) (NASA)	Langley
SSC	Sub-System Controller (WSC)	Goddard
SSC	Super Star Cluster	Goddard
SSC	Support Service Contractor	Langley
SSC	Committee on Ship Structure, National Research Council,	CASI
SSC	John C. Stennis Space Center	CASI
SSC	Superconducting Super Collider	CASI
SSCB	Space Station Control Board	Langley
SSCC	Space Station Control Center	CASI
SSCD	SDV Software Concept Document	Goddard
SSCE	Solid Surface Combustion Experiment	CASI
SSCT	Support Service Contract Team	Langley
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SSD	Space Systems Division (of LMSC)	Goddard
SSD	Space Systems Div., Air Force Systems Command, Inglewood, CA	CASI
SSDIF	Spacecraft Systems Development and Integration Facility	Goddard
SSDN	Sun Synchronous Day/Night	CASI
SSDOO	Space Science Data Operations Office	Goddard
SSE	Solar System Exploration	Goddard
SSE	Space Support Equipment	Goddard
SSE	Software Support Environment	CASI
SSEC	Space Science and Engineering Center (University of Wisconsin Madison) (Research Center)	Langley
SSEC	Small Signal Equivalent Circuit	CASI
SSEC	Solar System Exploration Committee	CASI
SSEC	Southern most branch of the South Equatorial Current	CASI
SSEC	Southern Solar Energy Center	CASI
SSEC	Space Science Engineering Center	CASI
SSEMU	Space Station Extravehicular Mobility Unit	CASI
SSF	Single-Satellite Footprint	Goddard
SSF	Space Simulation Facility	Goddard
SSF	Space Station Freedom	CASI
SSF/AP	Space Station Freedom Attached Payload	Langley
SSFEPS	Space Station Freedom Electrical Power System	CASI
SSFM	Subsystem Fault Management	Goddard
SSFMB	Space Station Freedom Manned Base	CASI
SSFP	Space Station Freedom Program	Langley
SSFPO	Space Station Freedom Program Office	CASI
SSFUF	Space Station Freedom Utilization Flight	CASI
SSG	Sensor Systems Group	Goddard
SSG	Space Systems Group	Goddard
SSG	Standard Specific Gravity	CASI
SSGS	Standardized Space Guidance System	CASI
SSH	Sunshield Subsystem (HIRDLS)	Goddard
SSHA	System Safety Hazard Analysis	Goddard
SSI	Schedule Support Impact (NCC—MPT Message)	Goddard
SSIM	Spacecraft Simulator	Goddard
SSIP	System Safety Implementation Plan	Goddard
SSIP	Shuttle Student Involvement Program	CASI
SSIS	Space Station Information System	CASI
SSIU	Systems Simulator Interface Unit	Goddard
SSL	Space Sciences Laboratory	Goddard
SSL	Space Systems/Loral	Goddard
SSM	Spacecraft Subsystems Monitoring	Goddard
SSM	Support Service Module	Goddard
SSM	Support Systems Module	Goddard
SSM/I	Special Sensor Microwave Imager	CASI
SSM/OTA	Support Systems Module/Optical Telescope Assembly	Goddard
SSME	Space Shuttle Main Engine	CASI
SSMF	Space Station Microwave Facility	CASI
SSMF	Space Station Millimeter Facility	CASI
SSMI	Special Sensor Microwave Imager	CASI
SSMOC	SOFIA Science Mission Operations Center	Goddard
SSMS	SSM Simulator	Goddard
SSO	Space Systems Operations	Goddard
SSO	Special Security Officer	Langley
SSO	Sun Synchronous Orbit	Goddard
SSO	Support System for OEX (Orbital Experiments) (NASA)	Langley
SSO	Space Shuttle Orbiter	CASI
SSOT	Single Stage to Orbit	CASI
SSP	Space Shuttle Program	Goddard
SSP	Standard Switch Panel	Goddard
SSP	Star/Sky Photometry	Goddard
SSP	Site Survey Payload	CASI
SSPA	Solid State Power Amplifier	Goddard
SSPC	Solid State Power Converters	Goddard
SSPF	Space Station Processing Facility	CASI
SSPP	Solar/Stellar Pointing Platform	Goddard
SSPP	System Safety Program Plans	Goddard
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SSR	Solid State Recorder	Goddard
SSR	Secondary Surveillance Radar	CASI
SSRMS	Space Station Remote Manipulator System	CASI
SSRO	Systems Safety and Reliability Office	Goddard
SSRR	Software System Requirements Review	Goddard
SSRS	Start Restart System	CASI
SSS	Satellite Surveillance System	CASI
SSS	Satellite Servicer System	CASI
SSSA	Explorer 45	CASI
SSSA	Space Station Solar Array	CASI
SSSCE	Space Station Structural Characterization Experiment	Langley
SST	Satellite to Satellite Tracking	CASI
SST	Satellite Servicing Technology	CASI
SST	Sea Surface Temperature	CASI
SST	Shear Stress Transport	CASI
SST	Spacecraft Systems Test	CASI
SST	Supersonic Transport	CASI
SSTF	Space Station Training Facility	Goddard
SSTI	Small Spacecraft Technology Initiative	Goddard
SSTIR	Sea Surface Temperature Imaging Radiometer	CASI
SSTO	Single Stage To Orbit	CASI
SSTS	Star Simulator Test Stand	Goddard
SSU	Stratospheric Sounding Unit	CASI
ST	Star Tracker	Goddard
ST	Space Telescope	Goddard
ST	Space Technology	CASI
ST ScIF	Space Telescope Science Institute Facility	Goddard
ST-5	Space Technology-5	Goddard
STA	Star Tracker Assembly	Goddard
STACC	Standard Telemetry and Command Components	Goddard
STADAN	Satellite Tracking and Data Acquisition Network	CASI
STAFF	Stellar Acquisition Feasibility Flight	CASI
STAGG	Small Turbine Advanced Gas Generator	CASI
STAMP	Space Technology and Analysis and Mission Planning	CASI
STAMP	Stratospheric/Troposphere Aerosol Measurement Program	CASI
STAR	Shuttle Turnaround Analysis Report	Goddard
STAR	Space Taxi and Return (a PLS concept)	Langley
STAR	Space Telescope Audit Report	Goddard
STAR	Space Telescope Axial Replacement	Goddard
STAR	Scientific and Technical Aerospace Reports (Publication)	CASI
STARCIPS	Standard Army Civilian Pay System	Langley
STARE	Southern Tropical Atlantic Regional Experiment	Langley
STARI	STAR Annual Index	CASI
STARlink	Satellite Telemetry and Return Link	Goddard
STARPAHC	Space Technology Applied to Rural Papago Advanced Health Care	CASI
STARS	Standard Terminal Arrival Routes (Aviation)	Langley
STARS	Standard Terminal Automation Replacement System	Langley
STAT	ST Astrometry Team	Goddard
STAT	Small Transport Aircraft Technology	CASI
STAVF	Space Telescope Assembly and Verification Facility	Goddard
STBD	Starboard	CASI
STBE	Space Transportation Booster Engine	CASI
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STC	Satellite Test Center	Goddard
STC	Society for Technical Communication	Langley
STC	System Test Computer	Goddard
STC	System Test Console	Goddard
STC	System Test Controller	Goddard
STCD	Surface Tension Confinement Device	Goddard
STD	Science and Tech Div., Library of Congress, Washington, DC	CASI
STDAS	Space Telescope Deflection Amplifier Subsystem	Goddard
STDM	Staticized Time Division Multiplexer	Goddard
STDMS	Space Telescope Data Management System	Goddard
STDN	Spaceflight Tracking and Data Network	CASI
STDN CTV	STDN Compatibility Test Van	Goddard
STE	Space Technology Enterprise	Langley
STE	Special Test Equipment	Goddard
ST-ECF	Space Telescope-European Coordinating Facility	Goddard
STEDS	Shuttle Tether Deployer System	CASI
STEIS	Space Telescope Electronic Information System	Goddard
STELLAR	Star Tracker for Economical Long Life Attitude Reference	CASI
STEM	Scanning Transmission Electron Microscope	CASI
STEMS	Space Telescope Equipment Management System	Goddard
STEP	Satellite Test of the Equivalence Principle	CASI
STEP	Solar Terrestrial Energetics Program	CASI
STEP	Space Technology Experiment Platform	CASI
STEP	Space Test Experiment Platform	Goddard
STEP	Space Test Program	CASI
STEP	Space Transportation Engine Program	Langley
STEP	Specialty Training for Entry-Level Professionals	Goddard
STEP	Standard for the Exchange of Product Model Data	Goddard
STEP	Stratosphere Troposphere Exchange Project	CASI
STEP	Structures Technology Experiments Platform	CASI
STEP	Supra Thermal through Energetic Particle (sensor)	CASI
STEPO	Self Contained Toxicological Environmental Protection Outfit	CASI
STERAO	Stratosphere Troposphere Experiments: Radiation, Aerosols, Ozone	CASI
STEREO	Solar Terrestrial Relations Observatory	Goddard
STEX	Sensor Technology Experiment	CASI
STF	Satellite Test Facility	Goddard
STFS	Space Telescope Flight Software	Goddard
STFSDB	STFS Data Base	Goddard
STFVS	ST Functional Verification Simulation	Goddard
STGS	Space Telescope Ground System	Goddard
STGT	Second TDRSS Ground Terminal	Goddard
STH	Structural-Thermal Subsystem (HIRDLS)	Goddard
STI	Scientific and Technical Information	CASI
STIBUL	STI Bulletin	CASI
STIC	Space Telescope Institute Council	Goddard
STICR	STIS CPL Routing	Goddard
STIF	Software Test and Integration Facility	Goddard
STIF	Scientific and Technical Information Facility	CASI
STIK	STIS Thermal Interface Kit	Goddard
STIKSCAT	Stick Scatterometer	CASI
STIL	Scientific and Technical Information, Limited	CASI
STILAS	Scientific and Technical Information Library Automation System	Langley
STIMS	Scientific and Technical Information Modular System	Langley
STINGS	Stellar Inertial Guidance System	CASI
STINT	Standard Interface (for computer)	Goddard
STIO	Scientific and Technical Information, Old	CASI
STIOL	Scientific and Technical Information, Old Limited	CASI
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STIP	Scientific and Technical Information Program	Goddard
STIPO	Scientific and Technical Information Program Office	CASI
STIS	Space Telescope Imaging Spectrograph	Goddard
STK	Satellite Tool Kit	Goddard
STL	Science and Technology Laboratory	CASI
STM	Scientific, Technical, and Medical Publishers	CASI
STM	State Transition Matrix	Langley
STM	Structural Test Module	Goddard
STM	Structural/Thermal Model	Goddard
STME	Space Transportation Main Engine	CASI
STMEM	Structural/Thermal Model and Engineering Model	Goddard
STO	Solar Terrestrial Observatory	CASI
STOCC	Space Telescope Operations Control Center	Goddard
STOIC	Stratospheric Ozone Intercomparison Campaign	Langley
STOL	System Test and Operations Language	Goddard
STOL	Systems Test and Operation Language	Langley
STOL	Short Takeoff and Landing	CASI
STOLAND	STOL Navigation and Landing System	CASI
STOMS	Space Telescope Observatory Management System	Goddard
STOP	Structural/Thermal Optical	Goddard
STORM	Storm scale Operational and Research Meteorology	Langley
STOS	Spacecraft Test and Operations System	Goddard
STOVL	Short TakeOff and Vertical Landing	CASI
STP	Software Through Pictures	Goddard
STP	Solar Terrestrial Probes	Goddard
STP	Space Test Payload	Goddard
STP	Space Test Program	Langley
STP	System Test Plan	Goddard
STP	System Test Procedure	Goddard
STP	Standard Temperature and Pressure	CASI
STPCOE	Special to Project Checkout Equipment	Goddard
STPS	Shuttle Tracking Processor System	Goddard
STPS	Summary Task Planning Sheet	Goddard
STPT	Structural-Thermal Product Team	Goddard
STPx	Space Test Programx	CASI
STR	Science Tape Recorder	Goddard
STR	Software Trouble Report	Goddard
STR	System Test Review	Goddard
STRAP	Space Telescope Resource Analysis Program	Goddard
STRAT	Stratospheric Tracers of Atmospheric Transport	CASI
STREAM	Stratosphere and Troposphere Experiments by Aircraft Measurements	CASI
STROBE	Stratosphere Troposphere Ozone Balance Experiment	Langley
STRV	Space Technology Research Vehicle	Goddard
STS	Shuttle Transportation System	Goddard
STS	Space Transportation System	Goddard
STS	Solar Terrestrial Science	CASI
STScI	Space Telescope Science Institute	Goddard
STSCI	Space Telescope Science Institute (at Johns Hopkins Univ.)	CASI
STSDAS	Space Telescope Science Data Analysis Software	Goddard
STSOC	Space Telescope Science Operations Center	Goddard
STSOF	Space Telescope Science Operations Facility	Goddard
STSOP	Space Telescope Science Operations Project	Goddard
STTIR (or STTR)	Small Technology Transfer Innovation Research	CASI
STTP	Life Sciences Space Technology Training Program	CASI
STTP	Solar Terrestrial Theory Program	CASI
STTR	Small Business Technology Transfer	Goddard
STTR	Small Business Technology Transfer Program	Langley
STV	System Thermal Vacuum	Goddard
STV	Space Transfer Vehicle	CASI
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SU	Sensor Unit	Goddard
SU	Southern University	Goddard
SU3	(Three Dimensional Symmetry)	CASI
SUBIC	Submarine Integrated Control Project	CASI
SUCCESS	Subsonic Aircraft Contrail and Cloud Effects Special Study	CASI
SUCCESS	SUbsonic Contrails & Cloud Effects Special Study	Langley
SUE	Shuttle Unique Equipment	Goddard
SUM	Single event Upset Monitor	Goddard
SUMER	Solar Ultraviolet Measurement of Emitted Radiation on SOHO	Goddard
SUMS	Shuttle Upper Atmosphere Mass Spectrometer	CASI
SUN	Sun Microsystems, Inc. (company)	Goddard
SUNLITE	Stabilized Ultra-Narrow line Laser In-Space Technology Experiment	Langley
SUNLITE	Stanford University/NASA Lidar In Space Technology Experiment	CASI
SUN-WS	Sun Work Station	Goddard
SURF	Space Ultra Vacuum Research Facility	CASI
SURF	Synchrotron Ultraviolet Radiation Facility	CASI
SUROM	Start-Up Read Only Memory	Goddard
SURVSAT	Survivable Satellite Communication System	CASI
SUSIM	Solar Ultraviolet Spectral Irradiance Monitor	Langley
SUSIM	Spectral Irradiance Monitor	CASI
SV	Schedule Variance	Langley
SV	Science Verification	Goddard
Sv	Sievert (Radiation dose unit of measure)	CASI
SVA	Space View Aperture (HIRDLS)	Goddard
SVAT	Soil-Vegetation-Atmoshpere Transfer Model	Goddard
SVD	Space View Door	Goddard
SVEM	Spaceframe Verification Environment Measurement	Langley
SVF	Science Validation Facility	Goddard
SVFR	Special Visual Flight Rules	CASI
SVGA	Super VGA	Goddard
SVI	Spectral Vegetation Indices	Goddard
SVM	Structural Verification Model	Goddard
SVM	Support Vector Machine	JPL
SVO	Solar Variability Observatory	CASI
SVOC	Semi volatile Organic Compounds	CASI
SVS	Scientific Visualization System	Langley
SVS	Space View Source	Goddard
SVT	Science Validation Team	Goddard
SW	Space Wing	Goddard
SWA	Special Warfare Agency, Fort Bragg, NC	CASI
SWAD	Shop Work Authorizing Document	Goddard
SWADE	Surface Wave Dynamics Experiment	CASI
SWAP	Southwest Asia Project	Goddard
SWAPP	Surface Wave Processes Program	CASI
SWAS	Submillimeter Wave Astronomy Satellite	CASI
SWATEM	Small Force Weapons and Tactics Evaluation Model	CASI
SWCR	Software Concept Review	Goddard
SWE	Snow Water Equivalent	Goddard
SWE	Solar Wind Experiment	Goddard
SWG	Science Working Group	CASI
SWICS	Solar Wind Ion Composition Spectrometer	CASI
SWIM	Solar Wind Interplanetary Measurements	Goddard
SWIR	Shortwave Infrared	Langley
SWIR	Short Wave Infrared	CASI
SWIS	Satellite Weather Information System	CASI
SWISS	Satellite Weather Information for Stratospheric Science	CASI
SWISS	Shallow Water InSitu Survey	CASI
SWIT	Software Integration Test	Goddard
SWMP	Software Management Plan	Goddard
SWP	Short Wavelength Prime (Camera on IUE)	CASI
SWRI	Southwest Research Institute	Goddard
SWS	Short Wavelength Spectrometer	Goddard
SWS	Saturn Workshop	CASI
SXG	Spectrum-X-Gamma	Goddard
SXI	Solar X-Ray Imager	Goddard
SXRD	Soft X-Ray Detector	Goddard
SXRF	Synchrotron X Ray Fluorescence	CASI
SXRP	Soft X-Ray Polarimeter	Goddard
SXT	Soft X-ray Telescope on Yohkoh	Goddard
SYNCOM	Synchronous Communications Satellite	CASI
SYS	System	CASI
SZA	Solar Zenith Angles	CASI
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