A
A/D — Analog/Digital
A/G — Air to Ground
AA — Associate Administrator
AAA — Assistant Associate Administrator
ABF — Arraying and Beamforming
AACB — Aeronautics and Astronautics Coordinating Board
ABBE — Adaptive Base Band Equalizer
AC — Accomplishment Criteria
AC — Atmospheric Corrector
ACA — Associate Contractor Agreement
ACC — Access Control Center
ACCA — Automatic Cloud Cover Assessment
ACCESS — Advanced Communications Capabilities for Exploration and Science Systems
ACE — Advanced Composition Explorer
ACE — Array Combining Experiment
ACNT — Advanced Navigation and Communication Technology
ACO — Administrative Contracting Officer
ACRIM — Active Cavity Radiometer Irradiance Monitor
ACRIMSAT — Active Cavity Radiometer Irradiance Monitor Satellite
ACRS — Automated Conflict Resolution System
ACS — Advanced Communications Services
ACS — Attitude Control System
ACTL — Automated Compatibility Test Lab
ACTS — Advanced Communication Technology Satellite
ACWP — Actual Cost of Work Performed
ADD — Architecture Definition Document
ADEOS — Advanced Earth Observation Satellite
ADP — Architecture Decision Point
ADP — Automated Data Processing
ADPE — Automated Data Processing Equipment
ADS — Action Document Summary
ADS — Advisory and Directive System
A/E — Ascent/Entry
AEHF — Advanced Extremely High Frequency
AEMC — Advanced Environmental Monitoring and Control
AEP — Agency Execution Plan
AES — Advanced Exploration Systems
AEVA — Advanced Extra Vehicular Activity
AF — Air Force
AF — Award Fee
AFB — Air Force Base
AFFTC — Air Force Flight Test Center
AFL — Astrobiology Field Lab
AFPS — Automated Forms Processing System
AFRC — Armstrong Flight Research Center
AFS — Andrew File System
AFSCF — Air Force Satellite Control Facility
AFSCN — Air Force Satellite Control Network
AFSPC — Air Force Space Programs Command
AFSS — Autonomous Flight Safety System
AFTS — Autonomous Flight Termination System
AGILE — Astro-rivelatore Gamma a Immagini Leggero
AGL — Above Ground Level
AGNS — Automated Ground Network System
AGO — Santiago, Chile Tracking Station
AGS — Autonomous Ground Station
AGU — American Geophysical Union
AI — Action Item
AI — Artificial Intelligence
AIAA — American Institute of Aeronautics and Astronautics
AIM — Aeronomy of Ice in the Mesosphere
AIS — Automated Information Security
AISS — Automated Information System Security
AIT — Analysis and Integration Team
ALB — Automated Link Builder
ALI — Advance Land Imager
ALOS — Advanced Land Observing Satellite
ALS — Advanced Life Support
Alt-LASER — Altimeter Laser
Alt-RADAR — Altimeter Radar
ALTV — Approach & Landing Test Vehicle
AM — Amplitude Modulation
AM — Asset Manager
AM&O — Agency Management and Operations
AMAO — Advanced Mission Analysis Office
AMC — Access Management Center
AMMI — Asset Management /Maintenance Improvement
AMMOS — Advanced Multi-Mission Operations System
AMOS — Automated Mission Operations System
AMPM — Agency Mission Planning Model
AMPM — Agency Mission Planning Manifest
AMPTS — Automated Mission and Payload Tracking System
AMS — Administrative Messaging System
AMS — Antenna Management System
AMS — Automated Messaging System
AMSR — Advanced Microwave Scanning Radiometer
AMSR-E — Advanced Microwave Scanning Radiometer for EOS
AMSU — Advanced Microwave Sounding Unit
ANCC — Alternate Network Control Center
ANI — Automatic Number Identification
ANL — Argonne National Laboratory
ANSI — American National Standards Institute
ANT — Antenna
ANT IFL — Antenna Interfacility Link
AO — Announcement of Opportunity
AO — Authorizing Official
AOA — Abort Once Around
AOCS — Attitude and Orbital Control System
AOCSM — Alternate Organization Computer Security Manager
AOPNS — Activity and Outage Posting Notification System
AOR — Atlantic Ocean Region
AOS — Acquisition of Signal
AOS — Advanced Orbiting System
AP — Application Processor
APA — Allowance for Program Adjustments
APA — Antenna Pointing Assembly
APD — Avalanche Photo Diode
APEX — Advanced Photovoltaic and Electronic Experiment
APG — Annual Performance Goal
API — Application Program Interface
APID — Application Process Identifier
APL — Applied Physics Lab
APL — Average Picture Level
APM — Attached Pressurized Module
APMC — Agency Program Management Council
APMM — Agency Planning Mission Model
APOCC — Automated Project Operations Control Center
APP — Annual Performance Planning
AR — Anomaly Report
ARC — Ames Research Center
ARD — Atmospheric Reentry Demonstrator
ARIA — Advanced Range Instrumentation Aircraft
ARISS — Amateur Radio on International Space Station
ARM — Asteroid Redirection Mission
ARM — Atmospheric Radiation Measurement
ARMD — Aeronautics Research Mission Directorate
ASA — Australian Space Agency
ASA — Austrian Space Agency
ASAR — Advanced Synthetic Aperture Radar
ASCA — Advanced Spacecraft for Cosmology Astrophysics
ASCII — American Standard Code for Information Interchange
ASF — Alaska Satellite Facility
ASGSR — American Society for Gravitational and Space Research
ASI — Agenzia Spaziale Italiana (Italian Space Agency)
ASIC — Application Specific Integrated Circuit
ASL — Above Sea Level
ASM — Attached Sync Marker
ASMS — Antenna Simulator and Modeling System
ASO — Administrator Staff Office
ASO — Astronomical Search for Origins
ASP — Acquisition Strategy Planning
ASP — Attached Shuttle Payload
ASPC — Attached Shuttle Payload Center
ASQ — American Society for Quality
ASRC — Arctic Slope Regional Corporation
ASRS — Automated Support Requirements System
ASTER — Advanced Spaceborne Thermal Emission and Reflection Radiometer
AT — Aeronautics Technology
ATCP — Absolute Command Processor
ATDnet — Advanced Technology Demonstration Network
ATE — Automatic Test Equipment
ATF — Australian Tracking Facility
ATLO — Assembly, Test, and Launch Operations
ATM — Asynchronous Transfer Mode
ATP — Acceptance Test Plan
ATP — Authority to Proceed
ATR — Auto Track Receiver
ATS — Applications Technology Satellite
ATS — Automated Tracking Station
ATV — Automated Transfer Vehicle
ATXS — ATM Transmission System
AU — Astronomical Unit
AVHRR — Advanced Very High Resolution Radiometer
AVSTC — Apple Valley Science and Technology Center
AWCS — Agency Wide Coding Structure
AWG — Acquisition Working Group
AWOTS — Automated Wallops Orbital Tracking Station
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B
B&P — Bid and Proposal
BAFM — Business Administration and Financial Management
BAFO — Best and Final Offer
BAFR — Business Analysis and Financial Reporting
BARS — Baseline Accounting Reporting System
BAS — Basic Accounting System
BBA — Baseband Assembly
BBN — Broadband Network
BBS — Bulletin Board System
BCC — Backup Control Center
BCDS — Broadband Communications Distribution System
BCR — Baseline Change Request
BCWP — Budgeted Cost of Work Performed
BCWS — Budget Cost of Work Scheduled
BDA — Bermuda (call sign for Bermuda Ground Network Tracking Station)
BDS — Baseline Data System
BEO — Beyond Earth Orbit
BER — Bit Error Rate
BERTS — Bit Error Rate Test Set
BFA — Business Forecasting and Analysis
BFS — Backup Flight Software
BIP — Budget Input Process
BIS — Bureau of Industry and Security
BISyB — Business Information System Building Blocks
BLDR — Boulder
BMG — Beam Wave Guide
BMO — Business Management Office
BNL — Brookhaven National Laboratory
BOC — Base Operations Contract
BOD — Board of Directors
BOD —Basic Occupation Date
BOE — Basis of Estimate
BOL — Beginning of Life
BOSS — Business Operations Support Subsystem
BP — Bundle Protocol
BPA — Baseband Processing Assembly
BPGT — Blossom Point Ground Terminal
BPR — Baseline Performance Review
BPR — Biological and Physical Research
BPRS — Blossom Point Remote Station
bps — Bits Per Second
BPSK — Binary Phase Shift Key (keyed or keying)
BR — Bioastronautics Research
BRC — Block Recording Computer
BRI — Basic Rate Interface
BRIC — Budget and Resource Management Information Center
BRML — Block Recording Mission Log
BRS — Block Recording System
BRT — Business and Restricted Technology
BRTS — Bilateral Ranging Transponder System
BRU — Block Recording Unit
BSR — Biological Sciences Research
BSR — Bit Slippage Rate
BSRN — Baseline Surface Radiation Network
BVR — Block V Receiver
BW — Bandwidth
BWG — Beam Wave Guide
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C
C&N — Communications and Navigation
C&T — Communications and Tracking
C&TCS — Communications and Tracking Checkout System
C&W — Caution and Warning
C/N — Carrier-to-Noise Ratio
C/NOFS — Communications/Navigation Outage Forecasting System
C3I — Command, Control, Communications and Information
C4 — Command, Control, Communication Computers
CAAS — Contract Administration and Audit Services
CAD — Center Assistant to the Director
CAD — Computer-Aided Design
CAD — Computer-Aided Dispatch
CAIB — Columbia Accident Investigation Boardy
CALIPSO — Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation
CaLV — Cargo Launch Vehicle
CAM — Centrifuge Accommodation Module
CAM — Computer-Aided Manufacturing
CAM — Control Account Managers
CAN — Call sign for Canberra, Australia Ground Network Tracking Station
CANDOS — Communications and Navigation Demonstration on Shuttle
CAP — Competitive Access Provider
CAP — Control Account Plan
CAP — Corrective Action Plan
CAPS — Comet/Asteroid Protection System
CAR — Cloud Absorption Radiometer
CAR — Corrective Action Request
CARDS — Computer-Aided Recording and Display System
CART — Cloud and Radiation Testbed
CAS — Calibrated Ancillary System
CAS — Cost Accounting Standards
CAS — Coverage Analysis System
CASIS — Center for the Advancement of Science in Space
CASP — Cross Agency Support Programs
CAST — Chinese Academy of Space Technology
CAT — Corrective Action Team
CATM&E — Catalog Maintenance & Enhancement
CATSAT — Cooperative Astrophysics And Technology Satellite
CB — Control Board
CBA — Collective Bargaining Agreements
CBJ — Congressional Budget Justification
CBTA — Computer Based Training Area
CC — Cluster Controller
CC — Common Carrier
CC — Configuration Control
CCB — Configuration Control Board
CC — Convolutional Coding
CCAS — Contractor Cost Accrual System
CCB — Configuration Control Board
CCC — Concurrent Computer Corporation
CCC — Control Center Complex
CCCM — Center Customer Commitment Manager
CCDS — Customer Cost Distribution System
CCDTS — Common Carrier Domestic Satellite Transponder Service
CCF — Consolidated Communications Facility
CCGSE — Carrier/Customer Ground Support Equipment
CCITT — Consultative Committee for International Telephone and Telegraph
CCL — Closed-circuit loop
CCM — Customer Commitment Manager
CCO — Contract Change Order
CCO — Customer Commitment Office
CCOM — Control Center Operations Manager
CCS — Communications and Control Segment/System
CCS — Complex Control Sets
CCS — Configuration and Control Segment
CCSA — Common Control Switching Arrangement
CCSDS — Consultative Committee for Space Data Systems
CCSFS — Cape Canaveral Space Force Station (formerly: CCSAS – Cape Canaveral Air Force Station)
CCSR — Communications and Control Segment Replacement
CCT — Central Communications Terminal
CCTV — Closed-Circuit Television
CD — Central Data
CD&SC — Communications Distribution and Switching Centers
CDA — Command and Data Acquisition
CDAF — Central Data Acquisition Facility
CDC — Control Data Corporation
CDCN — Control and Display Computer Network
CDDT — Countdown Demonstration Test
CDE — Consolidated Development Environment
CDF — Communications Data Formatter
CDHF — Central Data Handling Facility
CDL — Controlled Documents List
CDM — Continuous Diagnostics and Mitigation
CDMA — Code Division Multiple Access
CDR — Central Data Recording
CDR — Conceptual Design Review
CDR — Critical Design Review
CDS — Control Data Systems
CDSCC — Canberra Deep Space Communications Complex
CE — Chief Engineer
CE — Current Expendable
CE&R — Concept Evaluation and Refinement
CEA — Center Export Administrator
CENBUD — Central Budget System
CEOS — Committee on Earth Observation Satellites
CEPEX — Central Equatorial Pacific Experiment
CERES — Clouds and the Earth’s Radiant Energy System
CESG — CCSDS Engineering Steering Group
CEV — Crew Exploration Vehicle
CEVP — Countermeasure Evaluation and Validation Project
CF — Central Facility
CFC — Chlorofluorocarbons
CFD — Central Flight Dynamics (Subsystem)
CFD — Computational Fluid Dynamics
CFDP — CCSDS File Delivery Protocol
CFIT — Controlled Flight Into Terrain
CFLOS — Cloud-free-line-of-sight
CFR — Code of Federal Regulations
CGBA — Commercial Generic Bioprocessing Apparatus
CGI — Common Gateway Interface
CGRO — Compton Gamma Ray Observatory
CGS — Columbus Ground System
CHAMP — Comet Halley Active Monitoring Program
CHEM — Chemistry
CHIPS — Cosmic Hot Interstellar Spectrometer
CHIPSat — Cosmic Hot Interstellar Plasma Spectrometer
CHIRPS — Computer Hardware Inventory and Repair Processing System
CHS — Crew Health and Safety
CI — Configuration Item
CIC — Capital Investment Council
CIC — CSOC Integration Center
CICA — Competition in Contracting Act
CIEF — Carrier Independent Exchange Facility
CIF — Central Instrumentation Facility
CIM — Customer Interface Management
CIMO — Customer Interface Management Office
CIMS — Calibration Information Management System
CIP — Change Information Page
CIP — International Communications and Information Policy
CIS — Center Information System
CIS — Commercialization, Innovation, and Synergies
CITE — Cargo Integrated Test Equipment
CITEL — Inter-American Telecommunications Commission
CJ — Congressional Justification
CL — Confidence Level
CL — Contractor Leased
CLASS — Communications Link Analysis and Simulation System
CLCL — Checkout and Launch Control System
CLCN — Commercial Lunar Communication and Navigation
CLCS — Checkout and Launch Control System
CLCS — Consolidated Launch Control System
CLF — Central Logistics Facility
CLF — Consolidated Logistics Facility
CLIPS — C Language Integrated Production System
CLMP — Coding Modulation Link Protocol
CLPS — Commercial Lunar Payload Support
CLTU — Command Link Transmission Unit
CLV — Crew Launch Vehicle
CM — Command Module
CM — Configuration Management
CM — Crew Module
CM&O — Center Management & Operations
CM&S — Communications Maintenance and Storage
CMA — China Meteorological Administration
CMA — Command Modulator Assembly
CMC — Center Management Council
CMC — Complex Monitor and Control
CMD — Command
CMLP — Coding, Modulation, and Link Protocol
CMO — Configuration Management Office
CMP — Configuration Management Plan
CMS — CDAF Matrix Switch
CMS — Command Management System
CMS — Command Matrix Switch
CMSM — Center Mission Services Manager
CNES — Centre National d’Etudes Spatiales (National Space Study Center – France)
CNMOS — Consolidated Network and Mission Operations Support
CNSA — China National Space Administration
CNSI — Classified National Security Information
CO — Contracting Officer
COADS — Comprehensive Ocean and Atmosphere Data Set
COARE — Coupled Ocean-Atmosphere Response Experiment
COBE — Cosmic Background Explorer
COD — Center Operations Directorate
Code M — Office of Space Flight
Code R — Office of Aerospace Technology
Code S — Office of Space Science
Code U — Office of Biological and Physical Research
Code Y — Office of Earth Science
COF — Columbus Orbital Facility
CoF — Construction of Facilities
COFR — Certificate of Flight Readiness
COGS — Cost Estimating Module for Mission Operations and Ground Data Systems
COLA — Collision On Launch Assessment
COMM — Communications
COMSEC — Communications Security
CoNNeCT — Communications, Navigation, and Networking re-Configurable Testbed (now the SCaN Testbed)
ConOps — Concept of Operations
CONS — Connection Oriented Network Service
CONTOUR — Comet Nucleus Tour
COOP — Continuity of Operations Plan
COR — Computer Operations Room
COR — Contracting Officer’s Representative (formerly COTR)
CORBA — Common Object Request Broker Architecture
CORF — Committee on Radio Frequency
CORIS — Code O Requirements Information System
CoSI — Commercial Satellite Communications Innovation
COSMIC — Constellation Observing System for Meteorology Ionosphere and Climate
COSPAS — Space System for the Search of Vessels in Distress (Cosmicheskaya Sistyema Poiska Avariynich Sudov – Russian)
COSTR — Collaborative Solar-Terrestrial Research
COTR — Contracting Officer’s Technical Representative
COTS — Commercial Off-the-Shelf
COTS — Commercial Orbital Transportation System
CPA — Command Processor Assembly
CPE — Change Package Engineer
CPE — Customer-provided equipment
CPEOC — Community Partners Emergency Operations Center
CPF — Calibration Parameter File
CPI — Cost Performance Index
CPIF — Cost Plus Incentive Fee
CPP — Capacity Projection Plan
CPU — Central Processing Unit
CR — Change Request
CR — Compliance Review
CRADA — Cooperative Research and Development Agreements
CRAM — Communications Routing and Metering
CRC — Communications Research Centre (Canada)
CRC — Cyclic Redundancy Check
CRCM — Combined Radiometric Correction Model
CRF — Communications Resource Facility
CRL — Communications Research Laboratory (Japan)
CRL — Countermeasure Readiness Level
CRM — Continuous Risk Management
CRT — Cathode-Ray Tube
CS — Constellation Systems
CS — Critical System
CS — Customer Service
CSA — Canadian Space Agency
CSCI — Computer Software Configuration Item
CSCS — Central Security Control System
CSD — Commercial Spaceflight Development
CSDL — Combined Systems Development Lab
CSEA — Commercial Spectrum Enhancement Act
CSI — Cost Savings Initiative
CSIR — Council for Scientific and Industrial Research (South Africa)
CSIRO — Commonwealth Scientific and Industrial Research Organisation (Australia)
CSIRT — Computer Security Incident Response Team
CSLA — Contract Service Level Agreement
CSLE — Civil Service Labor and Expenses
CSM — Customer Satisfaction Metrics
CSMAC — Communication System Monitor and Control
CSO — Chief S&MA Officer
CSO — Communication Service Office
CSOC — Consolidated Space Operations Contract
CSP — Cost Savings Profile
CSRM — Coordination Status Review Meeting
CSS — Communications Services Section
CSS — Control and Status System
CSS — Cross Support Services
CSTC — Consolidated Space Test Center
CSTL — Communications, Standards, and Testing Lab
CSTS — Cross Support Transfer Service
CSU — Channel Service Unit
CT — Compatibility Testing
CT — Crawler Transporter
CTA — Centro Tecnico Aeroespacial (Brazil)
CTCU — Central Telemetry and Command Unit
CTFS — Common Time and Frequency System
CTL — Compatibility Test Laboratory
CTM — Center Technology Manager
CTM — Control, Test, and Monitor
CTN — Commercial Technology Network
CTN — Communications and Tracking Network
CTOCC — Consolidated TDRSS Operations Control Center
CTQ — Critical to Quality
CTS — Center Telecommunications System
CTS — Compatibility Test Set
CTT — Compatibility Test Trailer
CTV — Compatibility Test Van
CTV — Crew Transfer Vehicle
CU — Configuration Unit
CU — Control Unit
CV — Cost Variance
CW — Carrier Wave
CWBS — Contract Work Breakdown Structure
CWI — Common Work Instruction
Cx — Constellation
CXO — Chandra X-ray Observatory (formerly: AXAF — Advanced X-ray Astrophysics Facility)
CY — Calendar Year
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D
D\A — Digital to Analog
DA — Decision Authority
DAA — Deputy Associate Administrator
DAAC — Distributed Active Archive Center
DADS — Data Archive and Distribution System
DAEP — DSN Aperture Enhancement Project
DAF — Data Analysis Facility
DARN — Dual Auroral Radar Network
DARPA — Defense Advanced Research Projects Agency
DAS — Demand Access Service
DASD — Direct Access Storage Device
DASS — Distress Alerting Satellite System
dB — decibel
DC — Differential Corrections
DCAA — Defense Contract Auditing Agency
DCC — Document Control Custodian
DCD — DSCC Command
DCE — Distributed Computing Environment
DCF — Data Capture Facility
DCMA — Defense Contract Management Agency
DCN — Document Change Notice
DCNSS — Data Center Network and Security Service
DCR — Document Change Request
DCS — Digital Cross-connect system
DDC — Direct Digital Control
DDF — Data Distribution Facility
DDOR — Delta Differential One Way Ranging tones
DDS — Data Distribution Services
DDT&E — Design, Development, Test, and Evaluation
DECnet — Digital Equipment Corporation Network
Delta-DOR — Delta-Differential One-way Range
DEMOS — Distributed Earth Model Orbiter System
DEN — DTN Experimental Network
DES — Data Encryption Standard
DESCANO — Deep Space Communications and Navigation Systems
DESDynl — Deformation, Ecosystem Structure, and Dynamics of Ice
DFCB — Data Format Control Book
DFCD — Data Format Control Document
DFE — Direct from Earth
DFI — Developmental Flight Information
DFS — Distributed File System
DG — Data Group
DGPS — Differential-Global-Positioning-System
DGT — DSCC Galileo Telemetry Subsystem
DHS — Department of Homeland Security
DI — Data Item
DIF — Data Interface Facility
DIS — Data Interface System
DIT — Development Integration Testing
DIXI — Deep Impact Extended Investigation
DLR — Deutschen Zentrum fur Luft- und Raumfahrt (German Aerospace Center)
DM — Data Management
DMAIC — Define Measure Analyze Improve Control
DMC — DSCC Monitor and Control
DMD — DSCC Media Data
DMO — Data Management Office
DMR — Detailed Mission Requirements
DMSP — Defense Meteorological Satellite Program
DNS — Director of Network Services
DNS — Domain Name Servers
DO — Delivery Order
DOC — Data Operations Center
DOC — Data Operations Control
DOC — Department of Commerce
DOCS — Data Operations Control System
DOD — Department of Defense
DODISS — Department of Defense Index of Specifications and Standards
DOL — Day of Launch
DOLILU — Day-of-Launch Initialization-Load Updates
DOMSAT — Domestic Satellite
DOS — Daily Operations Summary
DOS — Disk Operating System
DOT — Deep Space Optical Communications Terminal
DOT — Department of Transportation
DP — Destination Point
DP — Digital Processing
DPAF — Dual Payload Attach Fitting
DPAS — Defense Priorities and Allocation System
DPM — Deputy Program Manager
DPMC — Directorate Program Management Council
DPO — Deep Space Network Program Office
DPS — Data Processing System
DPS — Deep-Space Positioning System
DR — Deputy of Resources
DR — Discrepancy Report
DRC — Data Reduction Center
DRD — Data Requirements Document
DRF — Data Requirements Form
DRL — Data Requirements List
DRM — Design Reference Mission
DRS — Discrepancy Reporting System
DRTS — Data Relay and Tracking Satellite (JAXA)
DRVID — Differenced Range Versus Integrated Doppler
DS — Deep Space
DS-T — Deep Space Terminal
DSA — Demodulator Synchronizer Assembly
DSAC — Deep Space Atomic Clock
DSCC — Deep Space Communications Complex
DSCOVR — Deep Space Climate Observatory
DSE — Deep Space Element
DSH — Deep Space Habitat
DSMC — Data Services Management Center
DSMS — Deep Space Mission Systems
DSN — Deep Space Network
DSN-GCS — Deep Space Network – Ground Communications System
DSOC — Deep Space Optical Communications
DSOT — Deep Space Operations Team
DSP — Digital Signal Processor (Processing)
DSP — DSS Spectral Processor
DSRI — Danish National Space Center
DSS — Deep Space Station
DSS — Data Storage System
DSS — Destination Surface System
DSTD — Data Systems Technology Division
DSTL — Data Systems Technology Laboratory
DSU — Digital Service Unit
DSWG — Data Standards Working Group
DTD — Data Transfer Device
DTE — Direct-to-Earth
DTF — Development and Test Facility
DTMF — Dual Tone Multi-frequency
DTN — Delay/Disruption Tolerant Network
DTS — Digital Test Set
DTS — Distributed Teleconferencing System
DU — Dobson Unit
DV — Dissimilar Voice
DVIS — Digital Voice Intercommunications System
DVP — DSCC VLBI Processor
DXI — Data Exchange Interface
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E
E-M L2 — Earth–Moon LaGrange Orbit 2
E-S — Earth-to-Space
E-S L1 — Earth – Sun LaGrange 1
E-S L2 — Earth – Sun LaGrange 2
EAC — Estimate at Completion
EAFB — Edwards Air Force Base
EAP — Educator Astronaut Program
EAR — Export Administration Act
EARD — Exploration Architecture Requirements Document
EAW — Engineering Analysis Workstation
Eb/No — Energy per Bit-To-Noise Power Spectral Density Ratio
EB — Bureau of Economic and Business Affairs
EBGS — Earth Based Ground Systems
EBnet — EOS Backbone Network
EBRE — Earth-Based Relay Element
EC — Emergency Communications
EC — Equipment Cost
ECANS — Exploration Communications and Navigation Systems
ECC — Emergency Control Center
ECF — Engineering Computer Facility
ECM — Engineering Change Management
ECN — Engineering Change Notice
ECOMM — Early Communications
ECP — Engineering Change Proposal
ECS — EOSDIS Core System
EDAC — Error Detection and Correction
EDC — EROS Data Center
EDL — Entry Descent and Landing
EDOS — EOS Data and Operations System
EDP — Electronic Data Processing
EDS — Earth Departure Stage
EDT — Eastern Daylight Time
EDU — Engineering Development Unit
EEFOV — Extended Elliptical Field of View
EESS — Earth Exploration Satellite Service
EET — End-to-End Test
EF — Extended Facility
EFF — Efficiency
EFOV — Extended Field of View
EHS — Enhanced HOSC System
EIRP — Effective Isotropic Radiated Power
EIS — Enterprise Information System
ELC — ExPRESS Logistics Carrier
ELF — Extremely Low Frequency
ELT — Emergency Locator Transmitter
ELV — Expendable Launch Vehicle
EM — Electromagnetic
EMC — Electromagnetic Compatibility
EMC — Element Multiplexer/Correlators
EMCC — Emergency Mission Control Center
EMCS — Energy Management Control System
EMCS — Enhanced Mission Communication System
EMI — Electromagnetic Interference
EMO — Engineering Management Office
EMS — Emergency Medical Services
EMT — Emergency Medical Technology
ENCAP — Encapsulation
ENG — Electronic News Gathering Service
ENOC — Emergency Network Operations Center
Envisat — (European environmental satellite)
EO — Earth Orbiter
EO — Engineering Office
EO-1 — Earth Orbiter – 1
EOC — Emergency Operations Center
EOCC — Emergency Operations Control Center
EOF — Experiment Operations Facility
EOM — End of Mission
EOMS — Earth Orbiting Multi-mission Services
EOPO — Equal Opportunities Program Office
EOR — Earth Orbit Rendezvous
EOS — Earth Observing System
EOS-AM-1 — Earth Observing System (Morning)
EOS-CHEM — Earth Observing System (Chemistry)
EOSDIS — Earth Observing System Data Information System
EOSP — Earth Observing Scanning Polarimeter
EOSP — Electronic Only Support Plan
EOWG — EOS Operations Working Group
EP — Education Programs
EP — Equivalent Person
EPA — Environmental Protection Agency
EPCRA — Emergency Planning and Community Right-to-know Act
EPGN — EOS Polar Ground Network
EPIRB — Emergency Position-Indicating Radio Beacon
EPOCh — Extrasolar Planet Observations and Characterization
EPR — Engineering Peer Review
EPS — Electrical Power System
EPS — Emergency Planning Subcommittee (under the IRAC)
ER — Eastern Range
ERAST — Environmental Research Aircraft & Sensor Technology
ERB — Engineering Review Board
ERBE — Earth Radiation Budget Experiment
EROS — Earth Resources Observation System
ERP — Engineering Review Panel
ERPS — EOS Real-Time Processing System
ERR — Engineering Review Report
ERS — European Space Agency Remote Satellite
ERT — Emergency Response Team
ES&A — Engineering Study and Analysis
ESA — Earth Science Application
ESA — European Space Agency
ESAS — Exploration Systems Architecture Study
ESB — Enterprise Service Bus
ESC — Electronic Systems Command
ESC — Executive Safety Committee
ESCG — Engineering and Science Contract Group
ESDIS — Earth Science Data Information System
ESE — Earth Science Enterprise
ESG — Executive Steering Group
ESM — Earth Systematic Mission
ESMC — Eastern Space & Missile Center
ESMD — Exploration Systems Mission Directorate
ESMS — Earth Science Multi-Mission Services
ESnet — Department of Energy Science Network
ESPRIT — European System Providing Refueling, Infrastructure, and Telecommunications
ESRT — Exploration Systems Research and Technology
ESS — Earth System Science
ESS — Engineering Support Systems
ESSP — Earth System Science Pathfinder
EST — Eastern Standard Time
EST. NTE Value — Estimated Not To Exceed Value
ESTL — Electronic Systems Test Laboratory
ESTRACK — ESA Tracking Network
ETA — Estimated Time of Arrival
ETC — Estimate-to-Complete
ETDP — Exploration Technology Development Program
ETE — End-to-End
ETGT — Extended TDRS Ground Terminal
ETR — Eastern Test Range
ETS — Engineering Test Satellite
ETS — EOSDIS Test System
EU — Expected Utility
EUMETSAT — European Organization for the Exploitation of Meteorological Satellites
EUVE — Extreme Ultraviolet Explorer
EV — Earned Value
EVA — Extravehicular Activity
EVM — Earned Value Management
EVMS — Earned Value Management System
EWBS — Expanded Work Breakdown Structure
ExPRESS — EXpedite the PRocessing of Experiments to the Space Station
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F
F&PR — Facilities and Planning Requirements
F&T — Frequency & Timing
F/R — Frequency-Off Carrier to Symbol Rate Ratio
FAA — Federal Aviation Administration
FAC — Full Aperture Calibrator
FACA — Federal Advisory Committee
FAD — Formulation Authorization Document
FAQ — Frequently Asked Questions
FAR — Federal Acquisition Regulation
FAS — Frequency Assignment Subcommittee (under the IRAC)
FAST — Fast Auroral Snapshot Explorer
FAT — Factory Acceptance Test
FBS — Functional Breakdown Structure
FCC — Federal Communications Commission
FCDAS — Fairbanks Command and Data Acquisition Station
FCR — Facility Change Request
FCR — Flight Control Room
FCR — Future Communications Requests
FD — Flight Dynamics
FDCF — Flight Design Computational Facility
FDD — Flight Dynamics Division
FDDI — Fiber Distributed Data Interface
FDF — Flight Data File
FDF — Flight Dynamics Facility
FDMA — Frequency Division Multiple Access
FDO — Fee Determination Official
FDOA — Flight Dynamics Operations Area
FDP — File Data Processing
FDPC — Flight Dynamics Product Center
FDSDIC — Flight Dynamics Systems Development and Integration Center
FEC — Forward Error Correction
FEIT — Flight Element Integrated Test
FEMA — Federal Emergency Management Agency
FEP — Front-End Processor
FEPC — Front-End Processor Consolidation
FFRDC — Federally Funded Research and Development Center
FGB — Functional Cargo Block (Russian), Zarya Control Module
FGM — Fleet and Ground Management
FGST — Fermi Gamma-ray Space Telescope (formerly: GLAST — Gama Ray Large Area Space Telescope)
FIP — Federal Information Processing
FIPS — Federal Information Processing Standard
FIRMR — Federal Information Resources Management Regulations
FLL — Flight Loads Laboratory
FLSA — Fair Labor Standards Act
FLT — Flight
FM — Frequency Modulation
FM — Functional Managers
FMD — Facilities Maintenance Division
FMG — Frequency Management Group
FMM — Financial Management Manual
FMP — Future Mission Planning
FMR — Financial Management Requirement
FMS — Financial Management System
FOD — Flight Operations Directorate (formerly: MOD — Mission Operations Directorate)
FOIA — Freedom of Information Act
FOM — Figure of Merit
FORTRAN — Formula Translation
FOS — Flight Operations Segment/System
FOT — Flight Operations Team
FPGA — Field Programmable Gate Array
FPMR — Federal Property Management Regulation
FPO — Fleet Post Office
FPQ — Fixed Pedestal Q-Type Radar
FPR — Federal Procurement Regulation
FPS — Flight Planning System
FQR — Formal Qualification Review
FR — Flash Report
FR — Frame Relay
FRR — Flight Readiness Review
FRS — Failure Reporting System
FS — First Stage
FSA — Factory Service Agreement
FSA/SOW — Flight Project Support Office Support Agreement/Statement of Work
FSB — Fundamental Space Biology
FSD — Full-Scale Development
FSF — Factory Support Facilities
FSM — Flight Segment Manager
FSO — Facility Security Officer
FSP — Flight Project Support Office Support Program
FSR — Financial Status Review
FTE — Full Time Equivalent
FTF — Forward Transfer Frame
FTP — File Transfer Protocol
FTS — Federal Telecommunications System
FTS — Frequency and Timing Subsystem
FTS 2000 — Federal Telecommunications System 2000
FTS* — Flight Termination System
FTTA — Federal Technology Transfer Act
FTXS — FDDI Transmission System
FU — Flight Unit
FUSE — Far Ultraviolet Spectroscopy Explorer
FY — Fiscal Year
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G
G&A — General and Administrative
G/T — Gain to Noise Temperature Ratio
GAGAN — GPS Aided Geo Augmented Navigation
GAIA — Global Astrometric Interferometer for Astrophysics
GAO — Government Accountability Office
GAVRT — Goldstone Apple Valley Radio Telescope
GBMS — Glenn Research Center Business Management System
GBRA — Ground Based Radio Astronomy
GBRS — Generic Block Recording System
GC — Ground Controller
GCE — Ground Control Equipment
GCF — Ground Communications Facility
GCM — Ground Control Message
GCMR — Ground Configuration Message Request
GCP — Goddard Corporate Park
GCS — Ground Communication System
GD — General Dynamics
GDGPS — Global Differential Global Positioning System
GDIS — Guam Data Interface System
GDMS — Goddard Directives Management System
GDOP — Geometric Dilution of Precision
GDS — Call sign for Goldstone, California Ground Network Tracking Station
GDS — Ground Data System
GDSCC — Goldstone Deep Space Communications Complex
GDSS — Global Decision Support System
GEM — Galileo Extended Europa Mission
GEMINI— GRC Environment for Modeling Integrated Network Infrastructure
GENSAA — Generic Spacecraft Analyst Assistant
GEO — Geosynchronous Equatorial Orbit
GEOTAIL — Geomagnetic Tail Laboratory
GEWEX — Global Energy and Water Exchanges project
GFAC — Goldstone Frequency and Airspace Coordination
GFE — Government Furnished Equipment
GFP — Government Furnished Property
GFY — Government Fiscal Year
GHB — Goddard Handbook
Ghz — Gigahertz
GIDEP — Government Industry Data Exchange Program
GIF — Graphics Interchange Format
GIFTS — Geostationary Imaging Fourier Transform Spectrometer
GIG — Global Information Grid
GigE — Gigabit Ethernet
GIWG — GPS International Working Group
GL — Government Leased
GL — Government Led
GLD — Goldstone Logistics Depot
GLONASS — GLObal NAvigation Satellite System (Russia)
GMAT — General Mission Analysis Tool
GMI — Goddard Management Instruction
GMO — Ground and Mission Ops
GMOD — GPS Modular
GMSEC — Goddard Mission Services Evolution Center
GMSK — Gaussian Minimum Shift Keying
GMT — Greenwich Mean Time
GN — Ground Networks
GN&C — Guidance Navigation & Control
GNSS — Global Navigation Satellite System
GNUG — Ground Network Users’ Guide
GO — Government Owned
GOES — Geostationary Operational Environmental Satellite
GOES-L — Geostationary Operational Environmental Satellite-L Series
GOES-R — Geostationary Operational Environmental Satellite-R Series
GOIN — Global Observation Information Network
GOR — General Operations Room
GOSIP — Government Open Systems Interconnection Profile
GOTS — Government Off the Shelf
GP-B — Gravity Probe-B
GPE — Government Provided Equipment
GPIP — General Purpose Input
GPM — Global Precipitation Measurement
GPR — Goddard Procedural Requirements
GPRA — Government Performance and Results Act
GPS — Global Positioning System
GPSD — Global Positioning System Directorate
GRACE — Gravity Recovery and Climate Experiment
GRAIL — Gravity Recovery and Interior Laboratory
GRC — Glenn Research Center (formerly: the Lewis Research Center)
GRGT — Guam Remote Ground Terminal
GRIM — Global Realtime Interactive Map
GRS — Generic Recording System
GRTS — GRO Remote Terminal System
GS — Goldstone
GS — Ground Station
GS — Ground Support
GS — Ground System
GSA — General Services Administration
GSBCA — General Services Administration Board of Contract Appeals
GSDE — Ground Systems Development Environment
GSFC — Goddard Space Flight Center
GSI — Government Source Inspection
GSIF — Ground Station Interface Facility
GSIF — Ground System Interface Facility
GSM — Ground Segment Manager
GSOC — German Space Operations Center
GSOP — Ground System Operations Project
GSR — Geosynchronous Satellite Report
GSS — Generalized Support Software/System
GSSR — Goldstone Solar System Radar
GSTDN — Ground Spaceflight Tracking and Data Network
GT — Ground Terminal
GTA — Guam Telephone Authority
GTAS — Generic Trending and Analysis System
GTDM — Generic Time Division Multiplexed
GTDS — Goddard Trajectory Determination System
GTE — Global Tropospheric Experiment
GTSIM — Generic Telemetry Simulator
GUI — Graphical User Interface
GWAC — Government Wide Acquisition Contract
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H
H/W — Hardware
HAA — High Altitude Abort
HALCA — Highly Advanced Laboratory for Communications and Astronomy (also known as MUSES-B and VSOP)
HALOE — HALogen Occultation Experiment
HAT — HSF Architecture Team
HATS — Headquarters Action Tracking System
HBCU — Historically Black Colleges and Universities
HBTM — Hybrid Bispectral Threshold Method
HDLC — High-Level Data Link Control
HDR — High Data Rate
HDRS — High Data Rate System
HDTV — High Definition Television
HE — Human Exploration
HEDS — Human Exploration and Development of Space
HEF — High Efficiency
HEMT — High Electron Mobility Transistor
HEO — Highly Elliptical Orbit
HEOMD — Human Exploration and Operations Mission Directorate
HETE — High Energy Transient Experiment
HF — High Frequency
HGA — High Gain Antenna
HIDRA — High Data Rate Architecture
HiNet — High-Speed Network
HMD — Hardware Maintenance Depot
HMF — Hypergol Maintenance Facility
HNSC — Hellenic National Space Committee (Greece)
HOSC — Huntsville Operations Support Center
HPA — High Power Amplifier
HPBW — Half-Power Beamwidth
HPOA — High Power Optical Amplifier
HQ — Headquarters
HRDL — High Rate Data Link
HSF — Human Space Flight
HSMF — Headquarters Spectrum Management Forum
HSPP — Homeland Security Presidential Directive
HSR — Houston Support Room
HSRT — Human Systems Research and Technology
HSSI — High Speed Serial Interface
HST — Hubble Space Telescope
HTML — Hyper-Text Markup Language
HTTP — Hypertext Transfer Protocol
HTTPS — HyperText Transmission Protocol, Secure
HTV — H-2 Transfer Vehicle
HViDS — HOSC Video Distribution System
HYB2 — Hayabusa-2
hZ — Hertz
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I
I&T — Integration and Testing
I/F — Interface
I/O — Input/ Output
I/T — Information Technology
IAC — International Astronautical Congress
IAS — Image Assessment System
IATR — Initial Architecture Technology Review
IBAS — Interactive Basic Accounting System
IBPD — Integrated Budget and Performance Document
IBR — Integrated Baseline Review
IC — Institutional Committee
ICAM — Identity, Credential and Access Management
ICAO — International Civil Aviation Organization
ICC — Instrument Control Center
ICCN — Inter-center Council for Computer Networking
ICD — Interface Control Document
ICE — International Cometary Explorer
ICESat — Ice, Cloud, and Land Elevation Satellite
ICG — International Committee on Global Navigation Satellite Systems (United Nations)
ICON — Ionospheric Connection Explorer
ICS — Inter-Orbit Communication System
ICSSC — International Communications Satellite Systems Conference
IDE — Integrated Development Environment
IDECS — International Dark Energy Cosmology Survey
IDIQ — Indefinite Delivery Indefinite Quantity
IDNX — Integrated Digital Network Exchange
IEEE — Institute of Electrical and Electronics Engineers
IEMP — Integrated Enterprise Management Program
IETF — Internet Engineering Task Force
IF — Intermediate Frequency
IFDS — Integrated Frequency Deconfliction System
IFL — Inter-Facility Link
IFMP — Integrated Financial Management Program
IFMS — Interagency Fleet Management System
IFO — Intensive Field Observation
IFOR — Interagency Forum Operational Requirements
IFOV — Instantaneous Field of View
IG — Inspector General
IGARSS — International Geoscience and Remote Sensing Symposium
IGDG — Internet-based Differential GPS System
IGEB — Interagency GPS Executive Board
IGS — International GNSS Service
IGS — International Ground Stations
IKI — Russian Space Research Institute
ILLUMA-T — Integrated LCRD Low-Earth Orbit User Modem and Amplifier Terminal
ILN — International Lunar Network
ILS — Integrated Logistics Support
IM — Intermodulation
IMAGE — Imager for Magnetopause-To-Aurora Global Exploration
IMDC — Integrated Mission Design Center
IMI — Inner Magnetosphere Imager
IMIC — Integrated Management Information Center
IMO — International Maritime Organization
IMP — Integrated Master Plan
IMP — Interplanetary Monitoring Platform
IMS — Information Management System
IMS — Integrated Master Schedule
IMU — Inertial Measurement Unit
INCOSE — International Council on Systems Engineering
IND — Interplanetary Network Directorate
INOC — Integrated Network Operation Center
INPE — Instituto Nacional de Pesquisas Espaciais (National Institute for Space Research, Brazil)
INPS — Integrated Network Planning System
INS — Inertial Navigation System
INTA — Instituto Nacional de Técnica Aeroespacial (National Institute for Aerospace Technology, Spain)
INTEGRAL — International Gamma Ray Astrophysics Laboratory
IOA — Integrated Operations Architecture
IOAG — Interagency Operations Advisory Group
IOC — Initial Operating Capability
ION — Institute of Navigation
IONet — Internet Protocol (IP) Operational Network
IOP — Ignition Over Pressure
IOP — Intensive Observation Period
IOP — Interoperability Plenary
IP — International Partner
IP — Internet Protocol
IPAO — Independent Program Assessment Office
IPCE — Independent Program Cost and Evaluation
IPCS — Inter-process Communications System
IPD — Information Processing Division
IPF — Image Processing Facility
IPMS — Integrated Procurement Management System
IPN — Interplanetary Network
IPNOC — Internet Protocol Network Operations Center
IPO — Institutional Program Office
IPP — Innovative Partnership Program
IPS — Integrated Planning System
IPS — Internet Protocol Suite
IPT — Integrated Product Team
IPX — Novell Internetwork Packet Exchange
IR — Infrared
IRAD — Independent Research and Development
IRAC — Inter-department Radio Advisory Committee
IRD — Interface Requirements Document
IRIG — Inter-Range Instrumentation Group
IRIS —Interface Region Imaging Spectrograph
IRM — Information Resources Management
IRMS — Information Resources Management Service
iROC — Integrated Radio Optical Communications
IRRP — Institutional Realignment and Recovery Project
IRS — Indian Remote Sensing Satellite
IRSP — Instrumentation Radar Support Program
IRT — Independent Review Team
IRTF — Internet Research Task Force
IS — Implementing Strategy
ISA — Institutional Service Agreement
ISAS — Institute of Space and Aeronautical Science (Japan)
ISCCP — International Satellite Cloud Climatology Project
ISDC — International Space Development Conference
ISDN — Integrated Switched Digital Network
ISECG — International Space Exploration Coordination Group
ISM — Industrial, Scientific, and Medical
ISO — Infrared Space Observatory
ISO — International Organization for Standardization
ISP — Inertial Sun-Point
ISP — Internet Service Provider
ISRO — Indian Space Research Organization
ISS — International Space Station
ISSP — International Space Station Program
IST — Integrated Support Team
ISTP — Integrated Space Transportation Plan
ISTP — International Solar Terrestrial Physics
ITA — Internal Task Agreement
ITAC — International Telecommunication Advisory Committee
ITAR — International Traffic in Arms Regulations
ITCOP — Interagency Tracking and Communications Operations Panel
ITOS — Integrated Test and Operations System
ITS — Information Technology Security
ITU — Input Terminal Unit
ITU — International Telecommunication Union
ITU-R — International Telecommunication Union – Radiocommunications Sector
IUS — Inertial Upper Stage
IV&V — Independent Verification and Validation
IVT — Interface Verification Test
IWC — International Wireless Communications
IWG — Informal Working Group
J
JAXA — Japan Aerospace Exploration Agency
JDEM — Joint Dark Energy Mission
JEM — Japanese Experiment Module
JERS — Japanese Earth Resources Satellite
JHU — Johns Hopkins University
JICB — Joint Integration Control Board
JIMO — Jupiter Icy Moons Orbiter
JIN — JSC Information Network
JIP — Joint Implementation Plan
JMR — Jason-1 Mission Radiometer
JPD — JSC Policy Directive
JPEG — Joint Photographic Experts Group
JPL — Jet Propulsion Laboratory
JPSS — Joint Polar Satellite System
JSAC — Joint Strategic Assessment Committee
JSC — Johnson Space Center
JSON — JavaScript Object Notation
JTG — Joint Task Group
JTRS — Joint Tactical Radio System
JWST — James Webb Space Telescope (formerly: the NGST — Next Generation Space Telescope)
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K
KARI — Korea Aerospace Research Institute
KASI — Korean Astronomy and Space Science Institute
KCRT — Keyboard Cathode Ray Tube
KDD — Knowledge Discovery and Data
KDP — Key Decision Point
KFKI — Research Institute for Particle and Nuclear Physics (Hungary)
KFRL — Kennedy Forward Return Link
KICS — KSC Integrated Communications Services
KLOC — Thousands (Kilo) of Lines of Code
KOMPSAT — Korea Multi-Purpose Satellite
KSA — K-Band Single Access
KSAT — Kongsberg Satellite Services
KSC — Kennedy Space Center
KTS — Kennedy Tracking Station
KUS — Kennedy Uplink Station
KuSA — Ku-Band Single Access
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L
L&EO — Launch and Early Orbit
L1 — LaGrange Point 1
L2 — LaGrange Point 2
LACB — Landing Aids Control Building
LADEE — Lunar Atmosphere and Dust Environment Explorer
LAM — Laser Altimetry Mission
LAM — Liquid Apogee Motor
LAN — Local Area Network
LANL — Los Alamos National Laboratory
LaRC — Langley Research Center
LAS — Launch Abort System
LAT — Lunar Architecture Team
LATA — Local Access Transport Area
LBTM — Layer Bispectral Threshold Method
LBV — Low Bandwidth Video
LCC — Launch Commit Criteria
LCC — Launch Control Center/Complex
LCC — Life Cycle Cost
LCDM — Landsat Data Continuity Mission
LCNS — Lunar Communication and Navigation Systems
LCR — Launch Control Room
LCRD — Laser Communications Relay Demonstration
LCT — Lunar Communications Terminal
LDAR — Lightning Detection and Ranging
LDM — Limited Distance Modems
LDPC — Low Density Parity Check
LDR — Low Data Rate
LEC — Local Exchange Carrier
LEISA — Linear Etalon Imaging Spectral Array
LEMNOS — Laser-Enhanced Mission Communication Navigation and Operational Services
LEO — Low Earth Orbit
LEO Data Svc — Low Earth Orbit Data Services
LEO-T — Low-Earth Orbiting Terminal
LEOP — Launch and Early Orbit Phase
LeRC — Lewis Research Center (see also: Glenn Research Center)
LGA — Low Gain Antenna
LGS — Landsat-7 Ground Station
LH — Launch Head
LHCP — Left Hand Circular Polarization
LIMS — Logistics Inventory Management System
LIRA — Lunar Interferometric Radio Array
LIS — Logistics Information System
LISA — Laser Interferometer Space Antenna
LLCD — Lunar Laser Communication Demonstration
LLGT — Lunar Lasercom Ground Terminal
LLNL — Lawrence Livermore National Laboratory
LLO — Low Lunar Orbit
LLOC — Lunar Lasercom Operations Center
LLST — Lunar Lasercom Space Terminal
LLV — Lockheed Launch Vehicle
LM — Lunar Module
LMC — Link Monitor and Control
LMI — Local Management Interface
LMP — Link Monitor Processor
LMS — Life and Microgravity Science
LNA — Low Noise Amplifier
LO — Lunar Orbiter
LOC — Lines of Code
LOC — Loss of Crew
LOE — Level-of-Effort
LOF — Local Oscillator Frequency
LOGOS — Lights Out Ground Operations System
LOI — Lunar Orbit Insertion
LOM — Loss of Mission
LOP — Local Operating Procedures
LOR — Line Outage Recorder
LOR — Lunar Orbit Relay
LOS — Line of Sight
LOS — Loss of Signal
LP — Lunar Prospector
LPGS — Landsat Product Generation System
LPS — Landsat-7 Processing System
LPS — Launch Processing System
LPT — Low-Power Transceiver
LR — Lunar Relay
LR — Lunar Rendezvous
LRC — Langley Research Center
LRD — Launch Readiness Date
LRO — Lunar Reconnaissance Orbiter
LRR — Launch Readiness Review
LRS — Lunar Relay Satellite
LRU — Line Replaceable Unit
LSAM — Lunar Surface Access Module
LSDS — Life Sciences Data System
LSFEP — Life Sciences Flight Experiments Program
LUTE — Lunar Ultraviolet Telescope Experiment
LV — Launch Vehicle
LVDC — Launch Vehicle Data Center
LWS — Living with a Star
LZP — Level Zero Processing
LZPF — Level Zero Processing Facility
LZPS — Level Zero Processing System
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M
M&O — Maintenance and Operations
M&O — Mission Operations
M-PSK — M-ary Phase Shift Keying
MACS — Mission and Computing Support
MAD — Madrid Ground Network call sign
MAF — Michoud Assembly Facility
MAF — Multiple Access Forward
MAGR — Miniaturized Airborne GPS Receiver
MAPS — Measurement of Air Pollution from Satellites
MAR — Mission Analysis Room
MAR — Mission Assurance Requirement
MAR — Multiple Access Return
MaRS — Metrics and Reporting Study
MARSIS — Mars Advanced Radar for Subsurface and Ionospheric Sounding
MAVEN — Mars Atmosphere and Volatile EvolutioN
MBR — Microwave Background Radiation
MCC — Mission Control Center
MCC-M — Mission Control Center – Moscow
MCD — Maximum-likelihood Convolutional Decoder
MCG — Mojave Coordinating Group
MCO — Mars Climate Orbiter
MCR — Mission Concept Review
MD — Mission Directorate
MDA — Metric Data Assembly
MDL — Microgravity Development Laboratory
MDM — Multiplexer/Demultiplexer
MDR — Medium Data Rate
MDSC — Mission Data Storage Consolidation
MDSCC — Madrid Deep Space Communications Complex
ME — Memory Effect
MECO — Main Engine Cut-Off
MEI — Mission Essential Infrastructure
MEIT — Multi-Element Integration Test
MEJI — Mars Exploration Joint Initiative
MEO — Medium Earth Orbit
MEP — Management Education Program
MEP — Mars Exploration Program
MER — Mars Exploration Rover
MER — Maximum Error Rate
MER — Mission Evaluation Room
MESSENGER — MErcury Surface, Space ENvironment, GEochemistry, and Ranging
MESUR — Mars Environmental Survey
MetOp — Meteorological Operational Satellite
MEX — Mars Express
MF — Multi-frequency
MFR — Multifunction Receiver
MGA — Medium Gain Antenna
MGS — Mars Global Surveyor
MGS — McMurdo Ground Station
MGSO — Multi-mission Ground Systems Office
MI — Magnetospheric Imaging
MIDEX — Medium Class Explorer
MIL-STD — Military Standard
MILA — Merritt Island Launch Annex and call sign
MIS — Management Information System
MISR — Multi-angle Imaging Spectroradiometer
MISSE — Materials International Space Station Experiment
MIT LL — MIT Lincoln Laboratory
MLC — Master List Custodian
MLCD — Mars Laser Communications Demonstrator
MMS — Magnetospheric Multiscale Satellite
MMS — Multi-mission Modular Spacecraft
MMSEV — Multi-Mission Space Exploration Vehicle
MMT — Mission Management Team
MO — Mission Operations
MO&DSD — Mission Operations & Data Systems Directorate
MOA — Memorandum of Agreement
MOC — Mission Operations Center/Complex
MOCS — Mission Operations and Communications System
MODIS — Moderate Resolution Imaging Spectroradiometer
MODNET — MO&DSD Operational/Development Network
MOE — Measures of Effectiveness
MOIMS — Mission Operational and Information Management Services
MOL — Mission Operations Laboratory
MOMS — Mission Operations and Mission Services
MOPITT — Measurement of Pollution in the Troposphere
MOPSS — Mission Operations Planning and Scheduling System
MOR — Mission Operations Room
MOS — Mission Operations Summary
MOSO — Multi-mission Operations Support Office
MOU — Memorandum of Understanding
MOVE — Mission Operations Voice Enhancement\
MPCV — Multipurpose Crew Vehicle
MPF — Mars Pathfinder
MPIM — Multi-Program Integrated Milestones
MPPF — Multi-Payload Processing Facility
MPSR — Multi-Purpose Support Room
MR — Mars Relay
MRD — Mission Requirements Document
MRF — Maintenance & Repair Facility
MRO — Mars Reconnaissance Orbiter
MRR — Mission Readiness Review
MRT — Mission Readiness Test
MSAM — Mars Surface Access Module
MSBLS — Microwave Scanning Beam Landing System
MSD — Mission Support Directorate
MSFC — Marshall Space Flight Center
MSFN — Manned Space Flight Network
MSL — Mars Science Laboratory
MSL — Mission Support LAN
MSLS — Multiservice Launch Systems (Minuteman II)
MSM — Mission and Science Measurement Technology
MSO — Mars Science Orbiter
MSOC — Mission Support Operations Contract
MSOCC — Multi-Satellite Operations Control Center
MSR — Mission Support Request
MSR — Mission Support Room
MSR — Monthly Status Reviews
MSS — Mass Storage System
MSTO — Mars Science and Telecommunications Orbiter
MTBF — Mean Time Between Failures
MTO — Mars Telecommunications Orbiter
MTPE — Mission to Planet Earth
MTRS — McMurdo TDRSS Relay System
MTTR — Mean Time to Repair
MTV — Mars Transfer Vehicle
MUSES — Mu Space Engineering Satellite
MUSS — Multi-User Systems & Support
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N
NAC — NASA Advisory Council
NAC — Network and Communications
NACAIT — Network And Communication Analysis & Integration Team
NACC — NASA ADP Consolidated Center
NAFCOM — NASA Air Force Cost Model
NAI — National Aerospace Initiative
NALF — Naval Auxiliary Landing Field
NARA — National Archives and Records Administration
NAS — Numerical Aerodynamic Simulation
NASA — National Aeronautics and Space Administration
NASCOM — NASA Communications Network
NASCOP — NASA Communications Operating Procedures
NASDA — National Space Development Agency of Japan
NASIRC — NASA Automated Systems Incident Response Capability
NBS — National Bureau of Standards
NCAR — National Center for Atmospheric Research
NCC — Network Control Center
NCCDS — Network Control Center Data System
NCDC — National Climatic Data Center
NCI — NASA Collaborative Infrastructure
NCMA — National Contract Management Association
NCO — National Coordination Office
NCP — Network Control Program
NCS — National Communications System
NCTAMS — Naval Computer and Telecommunications Area Master Station
NDVI — Normalized Difference Vegetation Index
NE — Near Earth
NEA — Near Earth Asteroid
NEAR — Near Earth Asteroid Rendezvous
NEMS — NASA Equipment Management System
NEN — Near-Earth Network (formerly: GN — Ground Network; now the Near Space Network)
NENS — Near Earth Networks Services
NENUG — Near Earth Network User’s Guide
NEO — Near Earth Object
NEPA — National Environmental Policy Act
NERDS — NASA Electronic Radio Database System
NERN — Near Earth Relay Network
NESP — NASA Engineering Standards Panel
NETEX — Network Executive
NETSIM — Network Simulator
NEX — NASA Excepted Service
NEXRAD — Next Generation Radar
NextGen — Next Generation Air Transportation System
NF — Noise Figure
NFS — NASA FAR Supplement
NGI — Next Generation Internet
NGIN — Next Generation Integrated Network
NGLT — Next Generation Launch Technology
NGO — Non-Governmental Organization
NGST — Next Generation Space Telescope (see also: JWST)
NHB — NASA Handbook
NIC — Network Integration Center
NID — NASA Interim Directive
NIE — Networks Integration and Engineering
NIF — NASCOM Interface Facility
NIH — National Institutes of Health
NII — National Information Infrastructure
NIM — Networks Integration Manager
NIMO — Networks Integration Management Office
NIMS — Network Information Management System
NIR — Near Infrared
NIS — Network Information System
NISN — NASA Integrated Services Network
NISSU — NASA Information Systems Services Utility
NIST — National Institute of Standards and Technology
NLDN — National Lightning Detection Network
NMC — National Center for Atmospheric Research
NMC — Network Management Center
NMC — Network Monitor and Control
NME — Non-Maintainable Equipment
NMI — NASA Management Instruction
NMI — Nautical Mile
NMO — NASA Management Office
NMS — Network Management System
NOA — New Obligational Authority
NOAA — National Oceanographic and Atmospheric Administration
NOC — Networks Operations Center
NOCT — Network Operations Control Team
NODC — National Ocean Data Center
NODIS — NASA Online Directives Information System
NOLAN — NASCOM Operational Local Area Network
NOP — Network Operations Plan
NOPE — Network Operations Project Engineer
NORAD — North American Air Defense Command
NOSA — Norwegian Space Agency (formerly: NSC — Norwegian Space Center)
NOSP — Network Operations Support Plan
NPAS — Network Planning and Analysis System
NPD — NASA Policy Directive
NPG — NASA Procedures and Guidelines
NPLD — North Polar Layered Deposit
NPOESS — National Polar-Orbiting Operational Environmental Satellite System
NPP — Net Primary Productivity
NPP — Network Planning and Preparation
NPP — NPOESS Preparatory Project
NPPS — NASA Personnel and Payroll System
NPR — NASA Procedural Requirement
NPR — National Performance Review
NRA — NASA Research Announcement
NRE — Non Recurring Engineering
NREL — National Renewable Energy Laboratory
NREN — NASA Research and Education Network
NRO — National Reconnaissance Office
NRT — Near Real-Time
NRZ — Non-Return to Zero
NRZ-L — NRZ Level
NRZ-M — NRZ Mark
NS — Network Services
NSAP — Network Service Assurance Plan
NSBRI — National Space Biomedical Research Institute
NSCC — NASCOM Security Control Center
NSCP — National Space Communications Program
NSD — Network Services Division
NSD — NISN Services Document
NSDP — NASCOM System Development Plan
NSEP — National Security Emergency Preparedness
NSF — National Science Foundation
NSI — NASA Science Internet
NSI — Nuclear Systems Initiative
NSMG — NASA Spectrum Managers Group
NSN — Near Space Network (formerly: NEN— Near Earth Network and SN — Space Network)
NSpC — National Space Council
NSP — Network Support Plan
NSPO — National Space Program Office (Taiwan)
NSPSEWG — Network Services Projects Systems Engineering Working Group
NSR — NISN Service Request
NSSA — National Security Space Architect
NSSC — NASA Shared Services Center
NSSDC — National Space Science Data Center
NSSL — National Security Space Launch (formerly: EELV — Evolved Expendable Launch Vehicle)
NSTAC — National Security Telecommunications Advisory Committee
NSTC — National Science and Technology Council
NSTS — NASA Space Transportation System
NTC — NASA Teleconferencing Center
NTIA — National Telecommunications and Information Administration
NTP — Netrix Trunk Protocol
NTSP — NASA Technical Standards Program
NTTF — Networks Technical Training Facility
NVP — NOCC Very Long Baseline Interferometry (VLBI) Processor
NVTS — NASCOM Video Transponder Service
NWS — National Weather Service
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O
O&C — Operations and Checkout
O&M — Operations and Maintenance
OAFS — Onizuka Air Force Station
OBC — On-Board Computer
OBE — Onboard Equivalent
OC — Optical Carrier
OCACT — Ohio Consortium for Advanced Communications Technology
OCE — Office of the Chief Engineer
OCFO — Office of the Chief Financial Officer
OCIO — Office of Chief Information Officer
OCN — Order Control Number
OCO — Orbiting Carbon Observatory
OCONUS — Outside the Continental United States
OCSM — Organization Computer Security Manager
OCT — Office of the Chief Technologist
OCTL — Optical Communication Telescope Laboratory
OD — Orbit Determination
ODAC — Orion Design Analysis Cycle
ODC — Other Direct Costs
ODIN — Outsourcing Desktop Initiative for NASA
ODM — Orbit Data Message
ODRC — Operational Data Reduction Complex
OE — Operational Engineer
OEM — Orbit Ephemeris Message
OFPP — Office of Federal Procurement Policy
OGC — Office of the General Counsel
OIG — Office of Inspector General
OIIR — Office of International Interagency Relations
OIS — Operational Intercommunications System
OIS-D — Operational Intercommunications System Digital
OIS-Q — Operational Intercommunications System Quintron
OLA — Office of Legislative Affairs
OLIA — Office of Legislative and Intergovernmental Affairs
OLSG — Optical Link Study Group
OLVBI — Orbiting Very Long Baseline Interferometry
OMB — Office of Management and Budget
OMC — Operations Management Council
OMCS — Operations Monitor and Control System
OMG — Object Management Group
OMI — Ozone Monitoring Instrument
OPF — Orbiter Processing Facility
OPII — Office of Program and Institutional Integration
OPR — Office of Primary Responsibility
OPS — Operations
ORNL — Oak Ridge National Laboratory
ORR — Operational Readiness Review
ORT — Operational Readiness Test
OS — Operating System
OSB — Operational Support Building
OSE — Orbital Support Equipment
OSHA — Occupational Safety & Health Agency
OSI — Open Systems Interconnection
OSMA — Office of Safety and Mission Assurance
OSP — Orbital Space Plane
OSTM — Ocean Surface Topography from Space Missions
OSTP — Office of Science & Technology Policy
O2O — Orion Artemis II Optical Communications System
OVEIWG — Orion Vehicle Engineering Integration Working Group
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P
P-REC — Received Power
P/AWS — Paging and Area Warning System
P/L — Payload
P/SDR — Program System Design Review
P/SRR — Program System Requirements Review
P2P — Point-To-Point
P2P — Program to Program
PA&E — Program Analysis And Evaluation
PAA — Phased Array Antenna
PAA — Program Alignment & Analysis
PABX — Private Automated Branch Exchange
PAC — Partial Solar Calibrator
PACOR — Packet Processor
PACOR-A — Packet Processor Automation
PAD — Packet Assembler/Disassembler
PAD — Project Authorization Document
PAIG — Program and Institutional Guidance
PAMWG — Performance Assessment Metrics Working Group
PAO — Public Affairs Office
PAPAC — Provide Aerospace Products and Capabilities
PAR — Performance Accountability Report
PAR — Performance and Accountability Report
PARS — Playback Anomaly Recovery System
PART — Program Assessment Rating Tool
PARTNeR — Proyecto Academico con el Radiotelescopio de NASA en Robledo (Spanish equivalent of GAVRT)
PASS — Primary Avionics Software System
PAV — Progress Assistance Visit
PB — President’s Budget
PBMA — Process Based Mission Assurance
PBX — Post Base Exchange
PC — Personal Computer
PCA — Program Commitment Agreement
PCASS — Program Compliance Assurance and Status System
PCB — Polychlorinated Biphenyl
PCB — Printed Circuit Board
PCB — Program Control Board
PCC — Permanent Consultative Committee
PCC — Processing Control Center
PCCA — Principal Center for Communications Architecture
PCCB — Program Change Control Board
PCD — Process Control Document
PCD — Project Commitment Document
PCE — Project Communications Engineers
PCFC — Proposed Change from Control
PCFS — Personal Computer Field System
PCM — Program Control Manager
PCM — Pulse Code Modulation
PCN — Page Change Notice
PCN — Procurement Control Number
PCS — Personal Communication Service
PD — Position Description
PD — Program Directive
PDAC — Procedures Development and Control
PDB — Project Data Base
PDC — Payload Development Capability
PDD — Presidential Decision Directive
PDF — Portable Date File format
PDF — Programmable Data Formatter
PDG — Payload Data Generator
PDL — Procedure Distribution List
PDM — Program Decision Memorandum
PDMS — Product Data Management System
PDN — Public Data Network
PDR — Preliminary Design Review
PDSS — Payload Data Services System
PDT — Procurement Development Team
PDU — Power Distribution Unit
PE — Program Executive
PEB — Performance Evaluation Board
PEC — Performance Evaluation Committee
PEPE — Plasma Experiment for Planetary Exploration
PF — Processing Facility
PFD — Power Flux Density
PFF — Pluto Fast Flyby
PFOTS — Poker Flats Research Range Orbital Tracking Station
PFP — Program Financial Plan
PFRR — Poker Flats Research Range
PFS — Poker Flat Station
PG — Procedural Guideline
PGOC — Payload Ground Operations Contract
PGS — Product Generation System
PHSF — Payload Hazardous Servicing Facility
PHW — Program Hours Worked
PI — Principal Investigator
PI/TL — Principal Investigator/Team Leader
PIM — Program Integration Manager
PIMC — Program/Institutional Management Council
PIMS — Payload Information Management System
PIN — Personal Identification Number
PIN — Product Identification Number
PIO — Program Integration Office
PIO — Public Information Office
PIP — Premium Internet Protocol
PIP — Process Improvement Project
PIR — Program Implementation Review
PjM — Project Manager
PL — Postlanding
PLC — Postlanding Communications
PLC — Programmable Logic Control
PLOP — Physical Layer Operations Procedure
PM — Phase Modulation
PM — Program Manager
PMA — President’s Management Agenda
PMB — Performance Measurement Baseline
PMB — Program Management Budget
PMC — Program Management Council
PMEL — Precision Measuring Equipment Laboratory
PMIC — Payload Mission Integration Contract
PML — Phoenix Mars Lander
PMM — Program Management Metrics
PMP — Point-to-Multipoint
PMP — Program Management Plan
PMR — Program Management Review
PMS — Performance Measurement System
PMSR — Project Management Status Report
PMT — Program Management Tool
PN — Pseudo-Random Noise
PNP — Preliminary Network Plan
PNT — Positioning, Navigation, and Timing
PO — Purchase Order
POC — Payload Ops Center
POC — Point of Contact
POCC — Payload Operations Control Center (JPL)
POCC — Project Operations Control Center (GSFC, JSC, MSFC)
POCS — Photo Optical Control System
POIC — Payload Operations Integration Center
POIS — PSCNI Online Information Service
Polar — Polar Auroral Plasma Physics Spacecraft
POLAR — Polar Plasma Laboratory
POMB — Plant Operations Maintenance Branch
POP — Period of Performance
POP — Program Operating Plan
POR — Program Operating Room
Portcomm — Portable Communications
PP — Planning Package
PP — Program Plan
PPA — Pollution Prevention Act
PPBE — Planning, Programming, Budgeting, and Execution
PPE — Personal Preference Electronics
PPF — Payload Processing Facilities
PPM — Program Performance Metrics
PPP — Point-to-Point Proximity
PPR — Program Planning Review
PPS — Packet Processing System
PPS — Payload Planning System (MSFC)
PPS — Precise Positioning System
PR — Project Requirements
PRA — Probabilistic Risk Analysis
PRA — Project Reporting Attribute
PRACA — Problem Reporting and Corrective Action
PRB — Peer Review Board
PRCB — Program Requirements Control Board
PRD — Program Requirements Document
PRD — Resources Planning Division (OCFO)
PRG — Program and Resources Guidance
PRG — Program Requirement Guidelines
PRG — Program Requirements Guidance
PRI — Primary Rate Interface
PRI&BRI — Primary and Basic Rate Interface
PrISMS — Program Information Systems Mission Services
PRMD — Private Management Domain
PRS — PORTS Refurbishment System
PSC — Policy and Strategic Communications
PSC — Program Support Communications
PSCN — Program Support Communications Network
PSCNI — PSCN Internet
PSCRD — Program Support Communications Requirements Document
PSE — Program Systems Engineering
PSE — Programmable Serializer Equipment
PSHS — Public Safety and Homeland Security Bureau
PSLA — Project Service Level Agreement
PSM — Power Slice Module
PSM — Procurement Strategy Meeting
PSP — Program Support Plan
PSR — Physical Sciences Research
PSR — Program Status Review
PSS — Packet Switching System (MSFC)
PSS — Platform System Services
PSS — Portable Spacecraft Simulator (GSFC)
PSTN — Public Switched Telephone Network
PTA — Portable TDRSS Antenna
PTC — Pacific Telecommunication Council
PTC — Payload Training Capability
PTP — Programmable Telemetry Processor
PTT — Postal Telegraph and Telephone
PUC — Power Utilities Commission
PUMP — Project Utilization Management Position
PVC — Permanent Virtual Circuits
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Q
QA — Quality Assurance
QM — Quality Manual
QMS — Quality Management System
QOS — Quality of Service
QPI — Quality Performance Index
QPMR — Quarterly Program Management Review
QPSK — Quadrature Phase Shift Key
QRA — Quantitative Risk Assessment
QUIKSCAT — Quick Scatterometer
QZSS — Quasi-Zenith Satellite System
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R
R&AD — Research and Advanced Development
R&D — Research and Development
RAB — Registration Accreditation Board
RAC — Remote Access Computer
RADARSAT — Radar Satellite
RAF — Return All Frames
RAID — Redundant Array of Independent Disks
RAID — Reports and Information Distribution
RAIF — Research Aircraft Integration Facility
RAM — Random Access Memory
RAM — Responsibility Assignment Matrix
RASM — Remote Access Scheduling Mailbox
RBAM — Risk-Based Acquisition Management
RCCA — Root Cause Corrective Action
RCF — Return Channel Frame
RCI — Remote Control Interface
RCM — Reliability Centered Maintenance
RCRA — Resource Conservation and Recovery Act
RCS — Radio Conference Sector/Subcommittee
RDD — Return Data Delay
RDTE — Research, Development, Testing and Evaluation
RE — Ranging Equipment
ReMAP — Research Maximization and Prioritization Task Force
RENAISSANCE — Reusable Network Architecture for Interoperable Space Science, Analysis, Navigation and Control Environments
RER — Receiver-Exciter Ranging
RF — Radio Frequency
RFA — Request for Action
RFC — Radio Frequency Compatibility
RFI — Radio Frequency Interference
RFISS — Radio Frequency Interference Surveillance System
RFP — Request for Proposal
RFQ — Request for Quotation
RFS — Request for Service
RFSA — Russian Federal Space Agency
RFSOC — Radio Frequency Simulations Operations Center
RFTS — Radio Frequency and Telemetry Station
RGRT — Remote Ground Relay Terminal
RGS — Requirements Generation System
RHCP — Right Hand Circular Polarization
RHESSI — Reuven Ramaty High Energy Solar Spectroscopic Imager (formerly: HESSI — High Energy Solar Spectroscopic Imager)
RID — Review Item Discrepancy/Disposition
RIDM — Risk-Informed Decision Making
RIE — Rapid Improvement Events
RISC — Reduced Instruction Set Computer
RLEP — Robotic Lunar Exploration Program
RLV — Reusable Launch Vehicle
RM — Review Manager
RM — Risk Management
RMA — Reliability, Maintainability, Availability
RMB — Risk Management Board
RMD — Risk Management Database
RMDC — Radiometric Data Conditioning
RMO — Risk Management Officer
RMOC — Remote Mission Operations Center
RMP — Risk Management Plan
RMWG — Risk Management Working Group
ROC — Remote Operations Center
ROCSAT — Republic Of China Satellite
ROM — Read-Only Memory
ROSAT — Roentgen Satellite
RPFS — Research Partnerships and Flight Support
RPOD — Rendezvous, Proximity Operations, and Docking
RPS — Record and Playback Subsystem
RS — Relay Satellite
RSA — Russian Space Agency
RTC — Real Time Combiner
RTLS — Return to Launch Site
RTN — Return (Link)
RTS — Real Time System
RUPS — Recorder/Utility Processor System
RUST — Remote User Scheduling Terminal
RXTE — Rossi X-Ray Timing Explorer
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S
S&MA — Safety and Mission Assurance
S/E — Space-to-Earth
S/S — Space-to-Space
S/A — Supplemental Agreement
S/C — Spacecraft
S/W — Software
SA — Service Agreement
SA — Single Access
SA — Spacecraft Adapter
SA — Supplemental Agreement
SA — System Administrator
SA&R — System Architecture and Requirements
SAA — Space Act Agreement
SAAM — Space Act Agreement Maker
SAC — Satellite de Aplicaciones Cientificas
SAC — Senate Appropriations Committee
SAC-B/HETE — Scientific Applications Satellite/High Energy Transient
SAC-C — Satellite de Aplicaciones Cientificas
SAEF — Spacecraft Assembly and Encapsulation Facility
SAGE — Stratospheric Aerosol & Gas Experiment
SAIC — Science Applications International Corporation
SAID — Strategic Analysis & Integration Division
SAIL — Shuttle Avionics Integration Lab
SAM — Stratospheric Aerosol Measurement
SAMPEX — Solar Anomalous and Magnetospheric Particle Explorer
SAMS — Servicing and Maintenance System
SANA — Space Assigned Numbers Authority
SAR — Schedule and Request
SAR — Search and Rescue
SAR — Software Acceptance Review
SAR — Synthetic Aperture Radar
SAREX — Shuttle Amateur Radio Experiment
SARSAT — Search & Rescue Satellite Aided Tracking
SAS — Shuttle Avionics System
SAVE — (solstice MTPE instrument)
SAVIO — Software and Avionics Integration Office
SB — Small Business
SB/SDB — Small Business/Small Disadvantage Business
SBAS — Satellite-based Augmentation System (ESA)
SBDR — Strategic Budget Decision Review
SBIR — Small Business Innovation Research
SBLO — Small Business Liaison Officer
SBU — Sensitive But Unclassified
SC — Security Critical
SC — Space Communications
SC — Spacecraft
SC — Statement of Capability
SC — Switching Center
SCA — Simulation Control Area
SCAMA — Switching, Conferencing, and Monitoring Arrangement
SCaN — Space Communications and Navigation
SCaNCB — Space Communications and Navigation Control Board
SCAP — Shared Capacity Asset Program
SCAR — Smoke, Clouds, and Radiation
SCAWG — Space Communications Architecture Working Group
SCCIB — Space Communications Coordination and Integration Board
SCD — Satellite Ceintificus Development -(Brazilian Environ)
SCDS — Space Communications & Data Systems
SCE — Spacecraft Command Encoder
SCENIC — SCaN Compatibility Environment for Networks and Integrated Communications
SCID — Spacecraft Identifier
SCIF — Sensitive Compartmented Information Facility
SCIO — Space Communications Integration Office
SCIP — SCaN Constellation Integration Project
SCISAT — Scientific Satellites From Canada
SCM — Single Column Model
SCM — Space Operations Commercialization Manager
SCMB — Space Communications Management Board
SCMM — Space Communications Mission Model
SCNS — Space Communications Network Services
SCO — Space Communications Office
SCP — Station Communications Processor
SCPB — Space Communications Planning Board
SCPS — Space Communications Protocol Standards
SCR — Selective Catalytic Reduction
SCR — SOMO Change Request
SCR — Strip Chart Recorder
SCS — Scan Correlated Shift
SCS — Specialized Customer Services
SCSC — Spacecraft Computer Support Center
SCSI — Small Computer System Interface
SCTS — SCaN Compatibility Test Set
SCWG — Spacecraft Control Working Group
SD2 — NISN Service Design and Development
SDA — Subcarrier Demodulator Assembly
SDB — Small Disadvantaged Business
SDC — Shuttle Data Center
SDD — Software Design Document
SDF — Software Development Facility
SDIL — Software Development Integration Laboratory
SDIS — Switched Digital Integrated Service
SDLC — Synchronous data link control
SDO — Solar Dynamics Observatory
SDO — Solar Dynamics Observatory
SDO — Space Discovery Office
SDOM — Station Development Operations Meeting
SDP — Science Data Processing
SDPF — Sensor Data Processing Facility
SDR — Software Defined Radio
SDR — System Definition Review
SDR — System Design Review
SDS — Shuttle Drawing System
SDS — Switched Data Service
SDSMP — Space Data Standards Management Plan
SDSR — Service Delivery Status Report
SE — Systems Engineering
SE&A — Systems Engineering and Architecture
SE&I — Systems Engineering & Integration
SEA — Scientist’s Expert Assistant
SEAS — Systems Engineering and Analysis Support
SEASTAR — Commercial Data Buy Of Ocean Color Data
SEAT — Safety Engineering Analysis and Test
SeaWiFS — Sea-viewing Wide Field-of-View Sensor
SEB — Source Evaluation Board
SEC — Sun-Earth Connection
SEDS — Small Expendable Deployer System
SEDSAT — Students For Exploration & Development Satellite
SEER — Support Engineering Evaluation Room
SEF — Sustaining Engineering Facility
SEF — System Engineering Facility (GSFC)
SEID — Service Element Identification
SELENE — SELenological and ENgineering Explorer
SELV — Small Expandable Launch Vehicle
SEMP — Systems Engineering Management Plan
SER — Savings Estimating Relationship
SERF — Software Engineering Research Facility
SERS — Space Erectable Radiator System
SES — Senior Executive Service
SET — Systems Engineering Team
SEU — Structure and Evolution of the Universe
SEWG — Systems Engineering Working Group
SEWP — Solutions for Enterprise-Wide Procurement
SFAC — Space Flight Advisory Council
SFCG — Space Frequency Coordination Group
SFOC — Space Flight Operations Contract(or)
SFOF — Space Flight Operations Facility
SFS — Space and Flight Support
S/G — Space-to-Ground
SG — Study Group (ITU-R)
SG 4 — ITU-R Study Group 4 – Fixed Satellite Service
SG 7 — ITU-R Study Group 7 – Science Services
SGAS — Second Guam Antenna System
SGI — Silicon Graphics Inc.
SGL — Space Ground Link
SGLT — Space to Ground Link Terminal
SGS — Svalbard Ground Station (Norway)
SGSS — Space Network Ground Segment Sustainment
SH&E — Safety, Health and Environment
SHARES — SHAred RESources
SHE — Safety, Health and Environment
SHFE — Space Human Factors Engineering
SHO — Scheduling Order
SI — System Integration
SIAG — Space Internetworking Architecture Group
SIC — Standard Industrial Classification
SIC — Support Identification Code (GSFC)
SIGI — Space Integrated GPS/INS
SII — Strategic Institutional Investments
SIIP — Space Internetworking Infusion Project
SIM — Space Interferometer Mission
SIMSS — Scalable Integrated Multi-mission Simulation Suite
SINSG — SCaN Integrated Network Steering Group
SIOT — System Integrated Operations Test
SIP — Standard Internet Protocol
SIP — SCaN Internship Project
SIRD — Support Instrumentation Requirements Document
SIRTF — Space Infrared Telescope
SIRTF — Space Infrared Telescope Facility
SIS — Science Information Services
SITF — Space Infrared Telescope Facility
SIUG — Special Interest User Groups
SIV&V — System Integration, Verification, and Validation
SIVVP — SCaN Integration Verification & Validation Plan
SL — Senior Level
SLA — Service Level Agreement
SLC — Scan Line Corrector
SLDPF — Spacelab Data Processing Function
SLE — Space Link Extension
SLF — Shuttle Landing Facility
SLI — Space Launch Initiative
SLOC — Single Line of Code
SLOC — Source Lines of Code
SLP — System Level Procedure
SLPP — Summary Level Planning Package
SLR — Satellite Laser Ranging
SLS — Space Launch System
SLSS — Shuttle Launch Support System
SM — Service Module
SM — Spectrum Management
SM — Statistical Multiplexer
SMA — S-band Multiple Access (GSFC)
SMA — Scan Mirror Assembly
SMA — Science Monitoring Area
SMAC — System Monitor and Control
SMAF — S-band Multiple Access Forward
SMAP — Soil Moisture Passive and Active
SMAR — S-band Multiple Access Return
SMART — SCaN Management Automation Resources Tool
SMC — Sciences Mission Directorate
SMC — Sensor Management Council
SMC — Strategic Management Council
SMCDS — Space Mission Communications and Data Services
SMD — Science Mission Directorate
SMD — Space and Missile Defense
SMD JAT — Space and Missile Defense Joint Analysis Team
SMDR — Station Message Detail Reporting
SMDS — Statistical Multiplexer Data System
SMDS — Switched Multimegabit Data Service
SME — Scan Mirror Electronics
SME — Subject Matter Expert
SMEX — Small Explorer
SMG — Spectrum Managers’ Group
SMGM — Spectrum Managers Group Meeting
SMMR — Scanning Multichannel Microwave Radiometer
SMO — Systems Management Office
SMP — System Management Policy
SMS — Shuttle Mission Simulator
SMTF — Shuttle Mission Training Facility
SMTF — Software Maintenance and Training Facility
SMTP — Simple Mail Transport Protocol
SN — Space Network
SN/GN — Space Network/Ground Network
SNA — System Network Architecture
SNAP — Systems and Networks Architecture Project
SNAS — Space Network Access System
SNE — Space Network Expansion
SNGS — Space Network Ground Segment
SNIP — Space Network Implementation Plan
SNIP — Space Network Interoperability Program
SNIS — Space Network IP Services
SNL — Sandia National Laboratory
SNM — Space Network Modernization
SNOE — Student Nitric Oxide Explorer
SNQR — Space Network Quarterly Review
SNR — Signal Noise Ratio
SNR — Signal to Noise Ratio
SNUG — Space Network User’s Guide
SOA — Statement of Assurance
SOARS — Spacecraft Orbital Anomaly Reporting System
SOC — Science Operations Center
SOC — Science Operations Coordination
SOC — Simulation Operations Center
SOC — Space Operations Council
SOCB — Space Operations Change Board —
SOCB — Space Operations Control Board
SODA — Space Operations Directive Agreement
SOE — Sequence of Events
SOE — Standard of Excellence
SOFIA — Stratospheric Observatory for Infrared Astronomy
SOHO — Solar and Heliospheric Observatory
SOLAR — NASA Site for Online Learning and Resources
SOLAR-A — (Japanese solar research satellite)
SOLC — Space Operations Learning Center
SOMD — Space Operations Mission Directorate
SOMO — Space Operations Management Office
SONET — Synchronous Optical Network
SOP — Standard Operating Procedure
SORCE — Solar Radiation and Climate Experiment
SORD — Support Operations Requirements Document
SORR — Stage Operations Readiness Review
SOS — Science on a Sphere
SOS — System of Systems
SOS — Space Operations Service
SOST — Space Operations Streamlining Team
SOTA — Special Operations and Testing Area
SOW — Statement of Work
SP — Solar Probe
SP&M — Special Projects and Missions
SP&OD — Suborbital Projects and Operations Directorate
SPA — Shuttle Processing Area
SPAN — Space Physics Analysis Network
SPAN — Spacecraft Analysis (JSC)
SPC — Signal Processing Center
SPCB — Scan Program Change Board
SPD — Space Product Development
SPDMS — Shuttle Processing Data Management System
SPF — Service Providing Facilities
SPF — Software Production Facility
SPG — Strategic Planning Guidance
SPI — Schedule (Work) Performance Index
SPICE — Space Program Integrated Contract Environment
SPIE — Spacecraft Payload Integration Evolution
SPIF — Shuttle POCC Interface Facility
SPIF-RS — SPIF – Replacement System
SPIP — SSP’s Process Integrity Plan
SPIP — Strategic Program Implementation Plan
SPjM — Sub-Project Managers
SPM — Service Performance Metrics
SPMC — Software Production Management & Control (JPL)
SPO — Shuttle Program Office
SPOC — Shuttle Payload of Opportunity Carrier
SPOT — Satellite Pour l’Observation de la Terre
SPP — SCaN Program Plan
SPR — Software Problem Report
SPS — Service Planning Segment
SPS — Spectrum Planning Subcommittee (under the IRAC)
SPSR — Service Planning Segment Replacement
SPT — System Performance Test
SPTR — South Pole TDRS Relay
SQIF — Superconducting Quantum Interference Filter
SR — Service Request
SR — Support Requirements
SRA — Sequential Ranging Assembly
SRB — Solid Rocket Booster
SRB — Standing Review Board
SRD — Systems Requirements Document
SRPM — Sun Reference Pointing Mode
SRR — System Readiness Review
SRRE — Search Rescue and Recovery Element
SRS — Space Research Service
SRS — Service Request System
SRS — Software Requirements Specification
SRS — Systems Requirements Specification
SRT — System Readiness Test
SRTM — Shuttle Radar Topography Mission
SRTM — Shuttle Radar Topography Mission
SS7 — Signaling System 7
SSA — S-band Single Access
SSA — Symbol Synchronizer Assembly
SSAF — S-band Single Access Forward
SSAR — S-band Single Access Return
SSAS — Service Scheduling Applications Software
SSBUV — Shuttle Solar Backscatter Ultraviolet
SSC — Station Support Computers
SSC — Stennis Space Center
SSC — Swedish Space Corporation
SSDR — Subsystem/Software Design Review
SSE — Solar System Exploration
SSE — Space Science Enterprise
SSEO — Solar System and Earth-Observing
SSEO — Space Science and Earth Observation
SSEO — Space Science and Earth Observing
SSF — Support Service Facilities
SSF — System Support Facility
SSFDR — Subsystem/Software Functional Design Review
SSFO — Space Shuttle Flight Office
SSG — Space Systems Group (old term, now SSS)
SSI — Server Side Include
SSL — Secure Socket Layer
SSM/I — Special Sensor Microwave/Imager
SSM/I — Special Sensor Microwave/Imager
SSO — Source Selection Official
SSO — Space Shuttle Orbiter
SSP — Space Shuttle Program
SSPF — Space Station Processing Facility
SSR — Satellite Situation Report
SSR — Solid State Recorder
SSRE — Search Rescue and Recovery Element
SSS — Space Systems Subcommittee (under the IRAC)
SSTF — Space Station Training Facility
SSU — Space Shuttle Upgrades
SSV — Space Service Volume
ST — Senior Scientific and Technical
ST — Space Telescope
ST-DCF — Hubble Space Telescope-Data Capture Facility
STA — Shuttle Training Aircraft
STADAN — Satellite Tracking and Data Acquisition Network
STARDUST — Space Dust Analysis Mission
STARLink — Satellite Telemetry & Return Link
STB — SCaN Testbed
Std — Standard
STDN — Spaceflight Tracking and Data Network
STE — Secure Telephone Equipment
STel — Stanford Telecommunications Corporation
STEM — Science, Technology, Engineering and Mathematics
STEP — Space Test Experimental Platform
STEREO — Solar TErrestrial RElations Observatory
STF — Simulation to Flight
STGT — Second Tracking and Data Relay Satellite System Ground Terminal
STI — Scientific and Technical Information
STIC — Scientific and Technical Information Center
STK — Satellite Tool Kit
STMD — Space Technology Mission Directorate
STOCC — Space Telescope Operations Control Center (formerly: HSTOCC — HST Operations Control Center)
STOL — Spacecraft Test and Operations Language
STP — SCaN Transition Plan
STP — Space Test Program
STPS — Software Telemetry Processing System
STRCS — Space Transportation Reimbursable Cost System
STRS — Space Telecommunications Radio System
STRV — Space Technology Research Vehicle
STS — Space Transportation System
STS — Synchronous Transport Signal
STScI — Space Telescope Science Institute
STTR — Small business Technology Transfer
STU — Secure Telephone Unit
SUCCESS — Subsonic Contrails and Clouds Effects Special Study
SUNSAT — Stellenbosch University Satellite
SUPRWG — SCaN Users Plans and Requirements Working Group
SV — Schedule (Work) Variance
SV — Space Vehicle
SVA — Svalbard
SVC — Switched Virtual Circuits
SVEL — Service Element
SVLBI — Space Very Long Baseline Interferometry
SVO — Special Vehicle Operations
SVS — Switched Voice Service
SVU — SAP Version Upgrade
SW — Space Wing
SWAP — Size, Weight, and Power
SWAPRA — South West Aerospace Professional Representatives Association
SWAS — Submillimeter Wave Astronomy Satellite
SWG — Sub-Working Group
Swift — Swift Gamma Ray Burst Explosion
SWIR — Short Wave Infrared
SWSI — Space Network Web Services Interface
Sync — Synchronizer
SZA — Solar Zenith Angle
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T
T&C — Telemetry and Command
T&CD — Timing and Countdown
T&DA — Tracking & Data Acquisition
T&E — Test and Evaluation
TA — Task Agreement
TA — Technical Authority
TACAN — Tactical Air Navigation
TAG — Technology Advisory Group
TAL — Transatlantic Abort Landing
TAP — Telemetry Acquisition Processor
TAP — Tracking Acquisition Processor
TARS — Test Analysis Retrieval System
TASP — Test and Simulation Processor
TASS — TDRSS Augmentation Satellite Service
TBD — To Be Determined
TBIRD — TeraByte InfraRed Delivery
TBR — To Be Resolved
TBS — To Be Supplied
TC — Technical Committee
TCA — Telemetry Channel Assembly
TCA — Transformational Communications Architecture
TCDS — Telemetry Data Processors
TCDT — Terminal Count Down Test
TCFEP — Telemetry and Communication Front-End Processor
TCH. POC — Technical Point of Contact
TCI — Technical Control Instrumentation
TCIR — Safety Total Case Incident Rate
TCM — Trim Correction Maneuvers
TCOPS — Trajectory Computation and Orbital Products System
TCP — Transmission Control Protocol/Processing
TCP/IP — Transmission Control Protocol/Internet Protocol
TCR — Training Control Room
TCS — Transformational Communications System
TCWG — Technical Capability Working Group
TD — Technical Direction
TDA&C — Telemetry, Data Acquisition, and Command
TDAC — Tracking, Data Acquisition, and Command
TDD — Task Description Document
TDD — Technical Description Document
TDF — TPOCC Development Facility
TDM — Time Division Multiplexing
TDMA — Time Division Multiple Access
TDR — Top Directorate Risk
TDRS — Tracking and Data Relay Satellite
TDRS-E — Tracking and Data Relay Satellite – East
TDRSS — Tracking and Data Relay Satellite System
TDS — Time Distribution System
TDS — Tracking Data System
TDSD — TDRS Digital Signal Distribution
TECCS — Test and Evaluation Command and Control System
TELOPS — Telemetry On-line Processing System
TERRA — A Spacecraft formerly called Earth Observing Spacecraft (EOS) AM-1
TERRIERS — Tomographic Experiment using Radiative Recombinative Ionospheric EUV and Radio Sources
TES — Tropical Emission Spectrometer
TESS — Transiting Exoplanet Survey Satellite
TFCR — Training Flight Control Room
TG — Task Group
TGA — Telemetry Group Controller
TGT — TDRSS Ground Terminal
THERE — TDRSS High-rate Equipment Replacement and Enhancement
TIA — Technical Implementation Agreement
TILT — TDRSS Internet Link Terminal
TIM — Technical Interchange Meeting
TIMED — Thermosphere, Ionosphere, Mesosphere, Energetics and Dynamics
TIMWOOD — Transportation, Inventory, Motion, Waiting, Overprocessing, Overproduction, Defects
TIN — Taxpayer Identification Number
TIOP — TIPIT Input/Output Port
TIP — Transition and Implementation Planning
TIPIT — TDRSS Interface Preprocessor Into the TELOPS
TIPLAB — Technical Information Program Laboratory
TIROS — Television Infrared Observational Satellite
TISA — Time Interpolation and Spatial Averaging
TIV&V — Transition, Integration, Verification, and Validation
TKUP — TDRS K-Band Upgrade Project
TL — Team Leader
TLAN — TPOCC Local Area Network
TLAS — TDRSS Look Angle System
TLC — Trans Lunar Cruise
TLE — Two Line Element
TLI — Trans Lunar Injection
TLM — Telemetry
TM — Technical Memorandum
TM — Technical Monitor
TM — Thematic Mapper
TMA — Telemetry Annex
TMOC — TOMS-EP Mission Operations Center
TMOD — Telecommunications and Mission Operations Directorate (JPL)
TMP — Technology Management Plan
TMP — Travel Manager Plus
TMR — Technical Management Representative
TMR — Technical Manager’s Representative
TMS — Telecommunication and Mission System
TMT — Technology Management Team
TNOC — TDRS Network Operations Control
TOCC — TDRS Operations Control Center
TOCC — TDRSS Operations Control Center
TOGA — Tropical Ocean Global Atmosphere
TOMS — Total Ozone Mapping Spectrometer
TOMS-EP — Total Ozone Mapping Spectrometer-Earth Probe
TOPEX — The Ocean Topography Experiment
ToR — Terms of Reference
TOR — TPOCC Operations Room
TOS — Transfer Orbit Stage
TOTS — Transportable Orbital Tracking Station
TOTS — Transportable Orbital Tracking System
TPC — Technical Performance Commitments
TPCE — Telemetry Processing Control Environment
TPF — Telemetry Processing Facility
TPM — Technical Performance Metrics
TPOCC — Transportable Payload Operations Control Center
TPR — Top Program Risk
TProjR — Top Project Risk
TQM — Total Quality Management
TR — Tape Recorder
TR — Transition Readiness
TR — Transition Review
TRACE — Transitional Region and Coronal Explorer
TRACE DPS — Transitional Region and Coronal Explorer Data Processing System
TRAPS — Telemetry & Radar Acquisition Processing Systems
TRL — Technology Readiness Level
TRMM — Tropical Rainfall Measuring Mission
TRR — Test Readiness Review
TSA — Telemetry Simulator Assembly
TSA — Transportation Security Agency
TSB — Technical Support Building
TSC — Technical Subcommittee (under the IRAC)
TSD — Technology and Standards Development Division
TSDIS — Time Sensitive Data Information System
TSO — Technical Support Office
TSSF — Tape Staging and Storage Facility
TT&C — Telemetry, Tracking and Command
TTAC — Transportable Telemetry and Command
TTR — TDRSS Trouble Report
TTR — Time to Restore
TURFTS — TDRSS User Radio Frequency Test Set
TUT — TDRSS Unused Time
TV — Test and Verification
TVOC — Television Operations Center
TWG — Technology Working Group
TWP — Transition Work Plan
TWT — Traveling Wave Tube
TWTA — Traveling Wave Tube Amplifier
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U
U-NII — Unlicensed National Information Infrastructure Devices
UAESA — United Arab Emirates Space Agency
UAF — University of Alaska Fairbanks
UAG — Users’ Advisory Group
UARS — Upper Atmosphere Research Satellite
UAS — Unmanned Aeronautical Systems
UAV — Unmanned Aerial Vehicles
UB — Undistributed Budget
UCAR — University Corporation for Atmospheric Research
UCAV — Unmanned Combat Air Vehicle
UCSS — UARS CDHF Software System
UDC — Utilization Development Capability
UDP — User Datagram Protocol
UDS — Universal Documentation System
UELV — Unmanned Expendable Launch Vehicle
UF — Utilization Flight
UFR — UnFunded Requirements
UHF — Ultra-High Frequency
UK — United Kingdom
UKSA — United Kingdom Space Agency
ULA — Unified Labor Account
UM — UARS Missions
UMA — University of Massachusetts
UMD — University of Maryland at College Park
UMS — Utilization and Mission Services
UN — United Nations
UNEX — University Explorers
UNI — User to Network Interface
UNITeS — Unified NASA Information Technology Services
UOA — User Operations Area
UOF — User Operated Facility
UON — Universal Operations Network
UPD — User Performance Data
UPN — Unique Project Number
UPN — Universal Product Number
UPS — Uninterruptible Power Supply
UPS — User Planning System
UQPSK — Unbalanced Quadrature Phase-Shift Keying
URL — Uniform Resource Locator
US — Upper Stage
USA — User Service Access
USAF — United States Air Force
USAID — U.S. Agency for International Development
USB — Unified S-Band
USC — United States Code
USCCS — User Spacecraft Clock Calibration Service
USCG — United States Coast Guard
USDA — U.S. Department of Agriculture
USG — United States Government
USGS — U.S. Geological Survey
USM — Unit of Service Metric
USM — Utilization Service Metrics
USMP — U.S. Microgravity Payload
USN — United States Navy
USNA — United States Naval Academy
USNO — United States Naval Observatory
USOC — United States Operations Center
USS — User Services System
USS-CR — User Services Segment Component Replacement
USSPACECOM — United States Space Command
USSR — User Service Subsystem Replacement
UST — Universal Space Transponder
USTAG — U.S. Technical Advisory Group
UTC — Universal Time Coordinated
UTDF — Universal Tracking Data Format
UTELOPS — Upgraded Telemetry On-line Processing System
UV — Ultraviolet
UWB — Ultra-Wideband Systems
UWI — Unique Work Instruction
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V
V&V — Verification & Validation
VAB — Vertical Assembly Building
VABR — Vertical Assembly Building Repeater
VAC — Variance at Completion
VAFB — Vandenberg Air Force Base
VAMS — Video/Audio Mastering System
VAR — Variance Analysis Report
VASS — ViTS Automated Scheduling System
VAX — Virtual Address Extension
VC — Virtual Channel
VC/MC — Virtual Channel/Master Channel
VCC — Video Control Center
VCDU — Virtual Channel Data Unit
VCID — Virtual Channel Identifier
VCL — Vegetation Canopy Lidar
VCP — Virtual Channel Packet
VCR — Video Cassette Recorder
VDMS — Voice Distribution Management System
VDS — Voice Distribution System
VGR — Voyager
VHF — Very High Frequency
VIIRS — Visible Infrared Imaging Radiometer Suite
VISSR — Visible and Infrared Spin Scan Radiometer
ViTS — Video Teleconferencing Service/System
VLBA — Very Long Baseline Array
VLBI — Very Long Baseline Interferometry
VLSI — Very Large Scale Integration
VME — Virtual Memory Extension
VMS — Virtual Memory System
VNIR — Visible & Near Infrared
VON — Virtual On Net
VOR — Vehicle Operations Room
VoTS — Voice Teleconferencing Service/System
VPF — Vertical Processing Facility
VPN — Virtual Private Network
VRML — Virtual Reality Modeling Language
VSE — Vision for Space Exploration
VSM — Value Stream Mapping
VSOP — VLBI Space Observatory Program
VSS — Voice Switching System
VTCC — Video Teleconferencing Control Center
VVC — Virtual ViTS Connection
VZA — Viewing Zenith Angle
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W
W/G — Working Group
WA — Workmanship Assurance
WAAS — Wide Area Augmentation System
WAC — WRC Advisory Committee
WAD — Work Authorization Document
WAN — Wide Area Network
WARP — Wideband Advanced Recorder Processor
WART — White Sands Auxiliary Remote Tracking
WART — WSC Alternate Relay Terminal
WATR — Western Aeronautical Test Range
WAVE — WWW, Artificial Intelligence, and Virtual Environments Exploration
WBC — Wide Band Correlator
WBS — Work Breakdown Structure
WCB — Wide Channel Bandwidth
WCF — Working Capital Fund
WCRP — World Climate Research Program
WFF — Wallops Flight Facility
WFOV — Wide Field of View
WGS — Wallops Ground Station
WI — Work Instruction
WIMS — Workforce Integrated Management System
WIP — Work In Progress
WIRE — Wide-Field Infrared Explorer
WLG — Working Level Group
WLG-E — Working Level Group – Engineering Analysis and Technical Assessments
WLPS — Wallops
WMAP — Wilkinson Microwave Anisotropy Probe
WMO — World Meteorological Organization
WOSB — Woman-Owned Small Business
WOTIS — Wallops Orbital Tracking Information System
WOTS — Wallops Orbital Tracking Station/System
WP — Working Party
WP4A — Working Party 4A – Efficient orbit/spectrum utilization (under SG 4)
WP7A — Working Party 7A – Time signals and frequency standard emissions
WP7B — Working Party 7B – Space radio systems
WP7C — Working Party 7C – Earth-exploration satellite systems and meteorological elements
WP7D — Working Party 7D – Radio astronomy
WP7E — Working Party 7E – Inter-service sharing and compatibility (disbanded)
WPET — Work Package Evaluation Team
WR — Western Range
WRC — World Radiocommunications Conference
WRF — Working Capital Fund
WSC — White Sands Complex
WSGT — White Sands Ground Terminal
WSMR — White Sands Missile Range
WSO — Wallops Scheduling Office
WSSH NS — White Sands Space Harbor (Northrup Strip)
WSTF — White Sands Test/Training Facility
WWS — World-Wide Standards
WYE — Work Year Equivalent
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X
XML — eXtensible Markup Language
XNAV — X-ray pulsar Navigation
XTE — X-Ray Timing Explorer
Y
Z
ZBR — Zero Base Review
ZOE — Zone of Exclusion