| A | | |
| | A/D | Analog to Digital |
| | AAS | American Astronomical Society |
| | AASC | Astronomy & Astrophysics Survey Committee |
| | Accum | Accumulator |
| | ACK | Acknowledge |
| | ACS | Attitude Control System / Advanced Camera for Surveys |
| | ACT | Automated Command Tracker / Attitude Control Tracker |
| | AD | Aperture Door |
| | ADC | Analog to Digital Converter |
| | ADD | Algorithm Description Document |
| | ADM | Aperture Door Mechanism |
| | ADP | Astrophysics Data Program |
| | ADU | Analog to Digital Units |
| | AEDC | Arnold Engineering Development Center |
| | AGC | Automatic Gain Control |
| | AGN | Active Galactic Nuclei |
| | AI | Action Item |
| | AIL | Action Item List |
| | AIM | Applied Innovation Management |
| | AIPS | Astronomical Image Processing System |
| | AIRE | AOR/IER Interpreter & Resource Estimator |
| | AIS | Automated Information Security |
| | AKPM | Attitude Knowledge Performance Monitor |
| | ALSF | Anomalously Large Solar Flare |
| | AMMOS | Advanced Multimission Operations System |
| | ANSI | American National Standards Issue |
| | AO | Announcement of Opportunity |
| | AOE | Astronomical Optical Efficience |
| | AOR | Astronomical Observation Request |
| | AOS | After Acquisition of Signal |
| | AOT | Astronomical Observation Template |
| | APES | Automated Pipeline Executive for Spitzer |
| | APEX | Astronomical Point Source Extractor |
| | APID | Application Process Identifier |
| | APO | Aperture Door Opening |
| | AR | Archival Research / Anomaly Report |
| | ARC | (NASA) Ames Research Center |
| | APID | Application Process Identifier |
| | ASCII | American Standard Code for Information Interchange |
| | ASD | Atomic Spectra Database |
| | ASE | Airborne Support Equipment |
| | ASIST | Advanced Spacecraft Integration and System Test |
| | ASP | Automated Sequence Processor |
| | ASQC | American Society for Quality Control |
| | ATLO | Assembly Test and Launch Operations |
| | AU | Astronomical Unit |
| | AURA | Association of Universities for Research in Astronomy, Inc. |
| | AWG | American Wire Gauge |
| | AXAF | Advanced X-Ray Astrophysics Facility (now CHANDRA) |
| C | | |
| | C | Centrigrade |
| | C2D | Cores to Disks (Legacy Project) |
| | C&DH | Command and Data Handling |
| | C&DHU | Command and Data Handling Unit |
| | CA | Cryrogenic Assembly |
| | CAA | Committee on Astronomy and Astrophysics |
| | CAT | Customer Adaptation Team |
| | CATNAP | Command and Telemetry 'N Also Parameters |
| | CAVE | Client AIRE Visibility Expeditor |
| | CCB | Change Control Board |
| | CCL | Channel Conversion Language |
| | CCSDS | Consultative Committee for Space Data Systems |
| | CCU | Charge Control Unit |
| | CDE | Cognizant Development Engineering |
| | CDF | Control Data File |
| | CDHU | Command and Data Handling Unit |
| | CDIF | Command and Data Interface Unit |
| | CDL | Command Definitions Language |
| | CDMU | CTA Driver Multiplexer Unit |
| | CDR | Critical Design Review / Central Data Recorder |
| | CDSCC | Canberra Deep Space Communications Complex |
| | CE | Combined Electronics |
| | CGRO | Compton Gamma Ray Observatory |
| | CHANDRA | Chandra X-ray Observatory |
| | CIA | Cold Instrument Assembly |
| | CIB | Cold Interface Bond |
| | CIDS | Critical Item Development Specification |
| | CIO | Channelized Input/Output |
| | CIP | Compression Information Packet (per CCSDS) |
| | CIRB | Cosmic Infrared Background |
| | CIT | California Institute of Technology |
| | CLAES | Cryrogenic Limb Array Etalon Spectrometer |
| | CLFP | Component Level Fault Protection |
| | CLTS | Close Loop Test Simulator/Set |
| | CLTU | Command Link Transmission Unit |
| | CM | Configuration Management |
| | CM/DM | Configuration Management/Data Management |
| | Cmd | Command |
| | CMD_DSN | File radiated through the DSN to a spacecraft. |
| | CMIC | C&DH Module Interface Card |
| | CMOS | Complementary Metal-Oxide Semiconductor |
| | COBE | Cosmic Background Explorer |
| | COTS | Commercial Of-The-Shelf |
| | CP | Call for Proposals / Coupler |
| | CP-1 | Cycle 1 Call for Proposals |
| | CP-2 | Cycle 2 Call for Proposals |
| | CPM | Communications Performance Monitor |
| | CPT | Channel Parameter Table / Contamination Product Team |
| | CPU | Central Processing Unit |
| | CPV | Common Pressure Vessel |
| | CR | Cosmic Ray / Change Request |
| | CRC | Cyclic Redundancy Check |
| | CREI | Contract with Educational Institution |
| | CSC | Common Start Configuration |
| | CSCI | Computer Software Configuration Item |
| | CSE | Control Section Electronics |
| | CSFS | Control Section Flight Software |
| | CSMM | Cryogenic Scan Mirror Mechanism |
| | CSOC | Consolidated Space Operations Contract |
| | CTA | Cryogenic Telescope Assembly |
| | CTD | Command Telemetry Dictionary |
| | CTF | Community Task Force |
| | CTIA | Capacitive TransImpedence Amplifier |
| | CTT | Compatibility Test Trailer |
| | CU | Cornell University |
| | CXO | Chandra X-ray Observatory |
| | CVS | Concurrent Version System |
| | CVZ | Continuous Viewing Zone |
| | CY | Calendar Year / Cycle |
| D | | |
| | D/L | Downlink |
| | Db | Database |
| | DAC | Digital to Analog Converter |
| | DAT | Data Analysis Tools |
| | DBA | Database Administrator |
| | DBMS | Database Management System |
| | DC | Direct Current |
| | DCE | Data Collection Event / Dust Cover Eject |
| | DCMC | Defense Contract Management Command |
| | DCS | Double Correlated Sampling |
| | DDT | Director's Discretionary Time |
| | DEC | Declination |
| | DED | Direct Engineering Data |
| | Desat | Desaturation (Maneuver) |
| | DIRBE | Diffuse Infrared Background Experiment |
| | DKF | DSN Keyword File |
| | DLLE | Downlink Loss Executive |
| | DMD | Data Monitor and Display |
| | DMT | Data Management Team |
| | DN | Digital Number/Data Number |
| | DO | Director's Office |
| | DOC | Depth of Coverage |
| | DOM | Distributed Object Manager |
| | DPA | Destructive Physical Analysis |
| | DQA | Data Quality Analysis |
| | DQE | Detector Quantum Efficiency |
| | DR | Discrepancy Report |
| | DRAM | Dynamic Random Access Memory |
| | DRM | Design Reference Mission |
| | Drvr | Driver |
| | DSCC | Deep Space Communications Complexes |
| | DSMS | Deep Space Mission System |
| | DSN | Deep Space Network |
| | DSNOps | DSNOps DSN Operations |
| | DSOC | Deep Space Operations Center |
| | DSOT | Data System Operations Team |
| | DSP | Digital Signal Processors |
| | DSS | Digital Sky Survey / Deep Space Station |
| | DWG | Drawing |
| E | | |
| | EAA | Enterprise Associate Administrator |
| | EBL | Extragalactic Background Light |
| | ECPS | Engine Change Proposal |
| | ECR | Engineering Change Request |
| | ECRF | Electronic Command Request Form |
| | ECSV | Encapsulated Comma-Separated Values |
| | EDAC | Error Detection and Correction |
| | EDR | Experiment Data Record |
| | EDU | Engineering Development Unit |
| | EED | Electro-Explosive Device |
| | EEIS | End-to-End Information System |
| | EEPROM | Electrically Erasable Programmable Read Only Memory |
| | EGSE | Electrical Group Support Equipment |
| | EIRR | External Independent Readiness Reviews |
| | ELV | Expendable Launch Vehicle |
| | EM | Engineering Model |
| | EMC | Electromagnetic Compatibility |
| | EMI | Electromagnetic Interference |
| | EMIC | EPS Module I/F Card |
| | EMU | Engineering Model Unit |
| | EOA | End of Activity |
| | EOF | End of File |
| | EO | Engineering Order |
| | EOM | End of Mission |
| | EOT | Engineering Operations Template |
| | EPO | Education and Public Outreach |
| | EPS | Electrical Power System |
| | ERO | Early Release Observation / Extremely Red Object |
| | ERT | Earth Receive Time |
| | ESA | European Space Agency |
| | ESD | Electrostatic Discharge |
| | ESMCR | Eastern Space & Missile Center Regulation |
| | ESO | European Southern Observatory |
| | ET | End Time |
| | EU | Expander Unit / Engineering Unit |
| | EVA | Extra-Vehicular Activity |
| | EVRs | Event Reporting |
| | EWG | Expansion Working Group |
| | EWR | Eastern Western Range |
| | Exec | Executive |
| | EX-PET | Extragalactic (Imaging) Performance Estimation Tool |
| F | | |
| | FAQ | Frequently Asked Question |
| | FCT | Flight Control Team |
| | FDDI | Fiber Distributed Data Interface |
| | FDIR | Fault Detection, Isolation and Recovery |
| | FDS | Facility Data System |
| | FDSIVP | Facility Data System Integration and Verification Plan |
| | FDSn | Flight Data System verification phase n |
| | FEI | File Exchange Interface |
| | FEPS | Formation and Evolution of Planetary Systems (Legacy Project) |
| | FES | Flight Engineering Support |
| | FET | Field Effect Transistor |
| | FGICD | Flight Ground Interface Control Document |
| | FHT | Fault History Table |
| | FIRST | Focal Plane Instruments and Requirement Science Team |
| | FITS | Flexible Image Transport System |
| | FLS | First Look Survey |
| | FLT | Flight |
| | FM | Flight Model |
| | FMEA | Failure Mode Effects Analysis |
| | FMECA | Failure Mode Effects and Criticality Analysis |
| | FNS | File Notification Service |
| | FOC | Flight Operations Center |
| | FODB | Flight Operations Database |
| | FONSI | Funding of No Significant Impact |
| | FOS | Flight Operations System |
| | FOT | Flight Operations Team |
| | FOV | Field Of View |
| | FP | Fault Protection |
| | FP&C | Fine Pointing & Control Mode |
| | FPA | Focal Plane Assembly (MIPS)/ Focal Plane Array (IRAC) |
| | FPC | Flight Processor Card |
| | FPDD | Fault Protection Description Document |
| | FPGA | Field Programmable Gate Array |
| | FPMA | Focal Plane Mount Array |
| | FPE | Focal Plane Electronics |
| | FPRD | Fault Protection Requirements Document |
| | FQT | Final Qualification Test |
| | FR | Failure Report |
| | FR&C | Flight Rules and Constraints |
| | FRCD | Flight Rules and Constraints Document |
| | FRD | Facility Requirements Document |
| | FRR | Flight Readiness Review |
| | FS | Facility Scientist |
| | FSRR | Facility System Requirements Review |
| | FSS | Flight Support System |
| | FSW | Flight Software |
| | FTA | Fault Tree Analysis |
| | FTE | Full Time Equivalent |
| | FTP | File Transfer Protocol |
| | FUDL | Fast Uplink Downlink |
| | FULDL | Fast Uplink Downlink |
| | FUSE | Far Ultraviolet Spectroscopic Explorer |
| | FWHM | Full Width at Half Maximum |
| | FY | Fiscal Year |
| I | | |
| | I&T | Integration and Test |
| | I/F | Interface |
| | I/O | Input/Output |
| | IAU | International Astronomical Union |
| | IBC | Impurity Band Conduction |
| | IC | Integrated Circuit |
| | ICC | Instrument Command and Control |
| | ICD | Interface Control Document |
| | ICRS | International Celestial Reference System |
| | IDC | Indirect Costs |
| | IDE | Integrated Drive Electronics |
| | IDL | Interactive Data Language |
| | IER | Instrument Engineering Request |
| | IET | Instrument Engineering Template |
| | IG | Interest Group |
| | IICD | Internal Interface Control Document (CTA) |
| | IMCT | Integration Mission Control Team |
| | IMF | Initial Mass Function |
| | IMIC | Integrated Multiple Instrument Chamber |
| | IMPST | Integrated Mission Planning and Scheduling Team (obsolete; now OPST) |
| | InSb | Indium Antimonide |
| | INT | Integration and Test |
| | INTEGRAL | International Gamma-Ray Astrophysics Laboratory |
| | IO | Input Output |
| | IOC | In-Orbit Checkout |
| | IPAC | Infrared Processing and Analysis Center |
| | IPO | Input Process Output |
| | IPP | Instrument Procedures and Parameters |
| | IPT | Integrated Product Team |
| | IPRD | Instrument Performance Requirements Document |
| | IR | Infrared |
| | IRAC | Infrared Array Camera |
| | IRAF | Image Reduction and Analysis Facility |
| | IRAS | Infrared Astronomical Satellite |
| | IRD | Interface Requirement Document |
| | IRS | Infrared Spectrograph |
| | IRSA | NASA/IPAC Infrared Science Archive |
| | IRSKY | Infrared Sky (science support tool) |
| | IRT | Infrared Telescope (Spacelab) |
| | IRTS | Infrared Telescope in Space |
| | IRU | Inertial Reference Unit |
| | IS | Instrument Support, Information Systems or Information Security |
| | ISAR | Incident Surprise and Anomaly Report |
| | ISDS | IRAC (Infrared Array Camera) Science Data Simulator |
| | ISM | Interstellar Medium |
| | ISO | Infrared Space Observatory |
| | ISSA | IRAS Sky Survey Atlas |
| | IST | Instrument Support Team |
| | IT | Instrument Team / Information Technology |
| | ITAR | International Traffic in Arms Regulations |
| | ITL | Incompressible Test List |
| | IUE | International Ultraviolet Explorer |
| | IVCS | Inner Vapor Cooled Shield |
| | IV&V | Independent Verification and Validation |
| M | | |
| | M&P | Materials and Process |
| | M&PD | Mission & Payload Development Division |
| | MACHO | Massive Compact Halo Object |
| | MAM | Mission Assurance Manager |
| | MAP | Mission Assurance Plan / Microwave Anisotropy Probe |
| | Mb | Megabyte |
| | Mbps | Megabit per second |
| | MC | Mission Critical |
| | MCB | Mission Change Board (also MCCB = Mission Change Control Board) |
| | MCE | Mission Critical Events |
| | MCO | Mars Climate Orbiter |
| | MCPOM | Momentum Control Performance Monitor |
| | MCR | Mission Change Request or MIPS Characterization Reports |
| | MDIRD | Mission Data Interface Requirements Document |
| | MDO | Mission Design and Operations |
| | MDR | Mission Dress Rehearsal / Material Discrepancy Report |
| | MDSSC | Madrid Deep Space Communications Complex |
| | MECO | Main Engine Cutoff |
| | MG | Mass Gauge heater |
| | MGDS | Multi-Mission Ground Data System |
| | MHz | Megahertz |
| | MIC | Multiple Instrument Chamber |
| | MIL | Military |
| | Mil-Std | Military Standard |
| | MIO | Master Input/Output Card |
| | MIPL | Multimission Image Processing Laboratory |
| | MIPS | Multi-Band Imaging Photometer for Spitzer |
| | MIUL | Materials Item Usage Agreement |
| | mJy | milliJansky |
| | MJy | megaJansky |
| | MLI | Multi-Layer Insulation |
| | MMA | Mission Management Area |
| | MMC | Mass Memory Card |
| | MMNav | Multimission Navigation |
| | MMNT | Multimission Navigation Team |
| | MMOC | Multimission Operations Center |
| | MO&DA | Mission Operations and Data Analysis |
| | MOC | Mission Operations Center |
| | MODB | Mission Operations Database |
| | MOPEX | Mosaicking and Point Source Extraction |
| | MOS | Mission Operations System |
| | MOSS | Moving Object Support System |
| | MOU | Memorandum of Understanding |
| | MP | Mission Planning |
| | MRB | Material Review Boards |
| | MRR | Mission Requirements Request |
| | MSA | Mission Support Area |
| | MSB | Most Significant Bit |
| | MSD | Mission System Design |
| | MSFC | Marshall Space Flight Center |
| | MST | Mission Sequence Team |
| | MSTAs | Mission Services Training Activities |
| | MSX | Midcourse Space Experiment |
| | MT | Management Team |
| | MU | Make-up Heater |
| | MUA | Material Usage Agreement |
| | MUX | Multiplexer |
| | MVCS | Middle Vapor Cooled Shield |
| N | | |
| | N/A | Not Applicable |
| | NAIF | Navigation Ancillary Information Facility |
| | NAK | Not Acknowledge |
| | NAR | Non-Advocate Review |
| | NASA | National Aeronautics and Space Administration |
| | NASCOM | NASA Communications Network |
| | NAV | Navigation |
| | NCF | Network Computing Facility |
| | NCP | Network Consolidation Project |
| | NDI | Non Destructive Inspection |
| | NED | NASA/IPAC Extragalactic Database |
| | NEPA | National Environmental Policy Act |
| | NF | Notch Filter |
| | NGC | New General Catalog |
| | NGST | Next Generation Space Telescope |
| | NHB | NASA Handbook |
| | NICMOS | Near-Infrared Camera and Multi-Object Spectrometer |
| | NiH2 | Nickel-Hydrogen |
| | NIST | National Institute of Standards and Technology |
| | NOA | New Obligational Authority |
| | NOAO | National Optical Astronomy Observatories |
| | NOCC | Network Operations Control Center |
| | NOCC-RT | Network Operations Control Center - Real Time Monitoring Tool |
| | NOP | Network Operations Plan |
| | NOPE | Network Operations |
| | NPG | NASA Procedures and Guidelines |
| | NRA | NASA Research Announcement |
| | NRAO | National Radio Astronomy Observatories |
| | NRZL | Non Return to Zero Low |
| | NSI | NASA Science Internet |
| | NSPARS | Non Standard Part Approval Request |
| | NSTD | Non Standard |
| | NVR | Non Volatile Residue |
| O | | |
| | OASPL | Overall Sound Pressure Level |
| | Obj | Object |
| | Obs | Observatory |
| | OD | Orbit Determination |
| | OET | Observatory Engineering Team |
| | OFP | Observatory Fault Protection |
| | OIA | Operational Interface Agreements |
| | OMC | Orion Molecular Cloud |
| | OO | Object Oriented |
| | Ops | Operations |
| | OPST | Observatory Planning and Scheduling Team |
| | OPZ | Operational Pointing Zone |
| | ORR | Operational Readiness Review / Observatory Requirements Review |
| | ORT | Operational Readiness Test |
| | OS | Observer Support / Operating System |
| | OSC | Office of Space Communications |
| | OSE | Observatory System Engineering |
| | OSEIT | Observatory System Engineering, Integration and Test |
| | OSF | Ordinary Solar Flare |
| | OSHA | Occupational Safety |
| | OSS | Office of Space Science |
| | OSSA | Office of Space Science and Applications |
| | OST | Observer Support Team |
| | OSTL | Operations Spacecraft Test Lab |
| | OVCS | Outer Vapor Cooled Shield |
| | OWLT | One Way Light Time |
| P | | |
| | P/S | Pedestal / Signal (in P/S Mode) |
| | P | Pressure |
| | PA | Product Assurance / Public Affairs |
| | PACS | Pointing and Attitude Control System |
| | PAF | Product Attach Fitting |
| | PAO | Period of Autonomous Operations |
| | PAP | Packet Acknowledgment Process |
| | PAR | Prime Archival Research |
| | PCA | Program Commitment Agreement |
| | PCB | Parts Control Board |
| | PCPM | Pointing Control Performance Monitor |
| | PCRS | Pointing Control Reference Sensor |
| | PCS | Pointing Control (Sub)System |
| | PDC | Power Distribution Cards |
| | PDDU | Power Distribution & Driver Unit |
| | PDF | Portable Document Format |
| | PDP | Project Documentation Plan |
| | PDR | Preliminary Design Review |
| | PDU | Power Distribution Unit |
| | PEF | Predicted Events File |
| | PERL | Practical Extraction and Report Language |
| | PEQA | Project Engineering Quality Analysis |
| | PET | Performance Estimation Tool |
| | PFR | Problem Failure Report |
| | PG&D | Power Generation and Distribution |
| | PH/SR | Photometry/Super-Resolution |
| | PI | Principal Investigator / Planet Imager |
| | PICD | Performance and Interface Control Document |
| | PIN | Positive Intrinsic Negative (diode) |
| | PIND | Part Impact Noise Detection |
| | PIU | Pyro Initiator Unit |
| | PLF | Payload Fairing |
| | PLP | Project Leadership Process |
| | PM | Proper Motion / Primary Mirror / Performance Monitor |
| | PMA | Primary Mirror Assembly |
| | PMC | Program Management Council |
| | PMS | Performance Measurement System |
| | PNAR | Preliminary Non-Advocate Review |
| | PO | Pipeline Ops |
| | POA | Period of Activity |
| | POC | Proof of Concept |
| | POP | Program Operating Plan |
| | PORR | Preliminary Observatory Requirements Review |
| | PPD | Protoplanetary and Planetary Debris |
| | PPDDP | Protoplanetary and Planetary Debris Disks Program |
| | PPIC | Payload and PCS Interface Card |
| | PR/TSA | Pointing Requirements/TMOD Support Agreement |
| | Pres | Pressure |
| | PRF | Point Response Function |
| | PRI | Pointing Ready Indicator |
| | PROM | Programmable Read Only Memory |
| | PRZ | Pointing Recovery Zone |
| | PS | Power Supply |
| | PSBA | Photon Shutter Blade Assembly (CTA) |
| | PSD | Power Spectral Density |
| | PSDA | Photon Shutter Drive Assembly |
| | PSF | Point Spread Function |
| | PSLA | Project Service Level Agreement |
| | PSM | Photon Shutter Mechanism |
| | PSSC | Point Source Sensitivity - Continuum |
| | PSSL | Point Source Sensitivity - Line |
| | PST | Point Source Transmission or Pacific Standard Time |
| | PU | Peak Up |
| | PUI | Peak Up Imaging |
| | PV | Performance Verification |
| | PVDC | Prop Value Driver Card |
| | PVL | Parameter Value Language |
| | PWBs | Printed Wiring Boards |
| S | | |
| | S&MO | Science & Mission Operations |
| | S/C | Spacecraft |
| | S/N | Signal to Noise |
| | S/W | Software |
| | SAM | Structures and Mechanisms |
| | SAO | Smithsonian Astrophysical Observatory |
| | SAR | Science Archive Retrieval |
| | SAS | Solar Array Simulator |
| | SASF | Spacecraft Activity Sequence File |
| | SATF | Spacecraft Activity Type File |
| | SBRC | Santa Barbara Research Center |
| | SC | Spacecraft |
| | SCA | Sensor Chip Assembly |
| | SCD | Source Control Documents |
| | SCET | Spacecraft Event Time |
| | SCI | Slew Complete Indicator |
| | SCLK | Spacecraft Clock |
| | SCLKSCET | Spacecraft Clock / Spacecraft Event Time |
| | SCMF | Spacecraft Command Message File |
| | SCP | Single Conductor Power Cable |
| | SCR | Schedule Change Request |
| | SCS | Single Conductor Signal Cable |
| | SDD | System Description Document (for SI) |
| | SDM | Science Data Management |
| | SDSS | Sloan Digital Sky Survey |
| | SDST | Small Deep Space Transponder |
| | SDT | System Design Team |
| | SE | System Engineer |
| | SEB | Single Event Burnout |
| | SECO | Second Engine Cutoff |
| | SED | Spectral Energy Distribution / Special Engineering Data |
| | SEE | Single Event Effects |
| | SEIT | System Engineering, Integration and Test |
| | SEL | Single Event Latchup |
| | SENS-PET | Sensitivity Performance Estimation Tool |
| | SEP | Single Event Phenomenon |
| | SEQGEN | Sequence Generation |
| | SER | Spacecraft Engineering Request / System Engineering Report |
| | SESPD | Space and Earth Science Programs Directorate |
| | SEU | Single Event Upset |
| | SF | Short Form |
| | SFOICD | Space/Flight Operations Interface Control Document |
| | SFOS | Space Flight Operations Schedule |
| | SH | Short-High |
| | SI | Science Instrument |
| | Si:As | Arsenic-doped Silicon |
| | Si:Sb | Antimony-doped Silicon |
| | SID | Selected Item Drawing |
| | SIE | Sequence Integration Engineer |
| | SIM | Simulation System |
| | SIMBAD | Set of Identifications, Measurements, and Bibliography for Astronomical Data |
| | SINDRA | Systems Improved Numerical Differencing Analyses |
| | SINGS | Spitzer Infrared Nearby Galaxies Survey |
| | SIRO | Shuttle Infrared Observatory |
| | SIRPASS | Spitzer Infrared Planning and Scheduling System |
| | SIRTF | Space Infrared Telescope Facility |
| | SIS | Science Instrument Services / Software Interface Specification |
| | SIST | Science Instrument Services Team |
| | SIT | System Integration and Test |
| | SL | Short-Low |
| | SLC | Space Launch Complex |
| | SLINC | Software tool which converts mnemonics to SCMF |
| | SLO | Second-Look Observation |
| | SM | Secondary Mirror |
| | SMART | Spectroscopy Modeling Analysis and Reduction Tool |
| | SMF | Spacecraft Model File |
| | SMS | Structure and Mechanics Subsystem |
| | SNR | Signal to Noise Ratio |
| | SOAS | Science Operations Application Server |
| | SOC | Spitzer Oversight Committee / State of Change |
| | SODB | Science Operations Database |
| | SOE | Sequence of Events |
| | SOFIA | Stratospheric Observatory for Infrared Astronomy |
| | SOM | Spitzer Observer's Manual |
| | SOMO | Space Operations Management Office |
| | SORD | Science Operations Requirements Document |
| | SOS | Science Operations System |
| | SOW | Statement of Work |
| | SOWG | Science Operations Working Group |
| | SPDB | Science Planning Database |
| | SPE | Static Phase Error |
| | SPEC-PET | Spectroscopy Performance Estimation Tool |
| | SPF | Single Point Failure |
| | SPICE | Spitzer IRS (Infrared Spectrograph) Custom Extraction / Spacecraft, Pointing, Instrument, Calibration, Engineering Files |
| | SPK | Spacecraft/Planet Kernel |
| | SPO | Spitzer Project Office |
| | SPOT | Spitzer Planning Observations Tool |
| | SPOTIER | Spitzer Planning Observations Tool (SPOT) Instrument Engineering Request (previously Expeditor) |
| | SPS | Selected Process Specification |
| | SQA | Software Quality Assurance |
| | SQL | Structured Query Language |
| | SR | Service Request |
| | SRAM | Static Random Access Memory |
| | SRD | System Requirements Document ; Science Requirements Document |
| | SRM | Solid Rocket Motor |
| | SRR | System Requirements/Release Review |
| | SRS | Short Range Scheduling / Software Requirements Specification |
| | SSA | Spacecraft Support Area |
| | SSC | Spitzer Science Center / (previously SIRTF Science Center) |
| | SSC-OC | Spitzer Science Center Oversight Committee |
| | SSF | Spacecraft Sequence File |
| | SSM | Solid State Memory |
| | SSO | Solar System Object/Observations |
| | SSPA | Solid State Power Amplifier |
| | SSR | Solid State Recorder |
| | SSRD | Spacecraft System Requirements Document |
| | ST/IRU | Star Tracker/Inertial Reference Unit |
| | ST | Star Tracker |
| | STA | Star Tracker Assembly |
| | STAR-PET | Stellar (Flux Estimator) Performance Estimation Tool |
| | STARS | Spitzer Transfer, Archive and Retrieval System |
| | STD | Standard |
| | STE | Special Test Equipment |
| | STL | Spacecraft/Software Test Laboratory |
| | STS | Short Term Scheduling or Sequence Translation Subsystem |
| | STScI | Space Telescope Science Institute |
| | STTF | SIRTF Telescope Test Facility |
| | SUP | Science Users Panel / Spitzer Unified Process / Support |
| | SUR | Sample Up the Ramp |
| | SUS | Science User Support |
| | SUST | Science User Support Team |
| | SUT | Science User Tools |
| | SV | Science Validation |
| | SVDIF | Space Vehicle Date Interface |
| | SVES | Space Vehicle Environmental Simulator |
| | SW | Switch |
| | SWAS | Submillimeter Wave Astronomy Satellite |
| | SWG | Science Working Group |
| | SWIRE | Spitzer Wide Area Infrared Survey |
| T | | |
| | T | Temperature |
| | TA | Telescope Assembly |
| | TAC | Time Allocation Committee |
| | TAWS | Test Anomoly Work Sheet |
| | TBD | To Be Determined ; To Be Done |
| | TBR | To be Resolved, Revised, Reviewed, or Released |
| | TBS | To Be Supplied |
| | TC | Temperature Controller |
| | TC&DM | Telemetry Command & Data Management |
| | TCC | Test Control Center |
| | TCMS | Test Control and Monitoring System |
| | TCO | Targeted Commercialization Office |
| | TCS | Thermal Control System |
| | TDL | Template Definition Language |
| | TDS | Telemetry Delivery Subsystem |
| | TELCOM | Telecommunications |
| | TFS | The File System |
| | TGSS | Task Group on Spitzer (SIRTF) and SOFIA |
| | TID | Total Integrated Dose |
| | TIS | Telemetry Input System |
| | Tlm | Telemetry |
| | TMM | Thermal Math Model |
| | TMOD | Telecommunications and Mission Operations Directorate |
| | TMS | Telecommunications and Mission Services |
| | ToO | Target of Opportunity |
| | TOT | Telemetry Output Tool |
| | TP | Total Power |
| | TPF | Telescope Pointing Frame / Terrestrial Planet Finder |
| | TPG | Time Pattern Generator |
| | TPM | Total Power Mode |
| | TPS | Twisted Pair Shielded Cable |
| | TR | Tuning Rate |
| | TRASYS | Thermal Radiation Analysis System |
| | TRK | Tracking Rate |
| | TST | TMOD Support Team |
| | TTACS | Test Telemetry and Command Subsystem |
| | TV/TB | Thermal Vacuum/Thermal Balance |
| | Tx | Transmit |
