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NASA/KSC ACRONYM LIST
A 3AAL Three Axis Acoustic Levitator A Angstrom A Acceleration A Aft A Alpha A Ampere A Analog Signal A&A Advertise and Award A&E Architects and Engineering A&E Architectural and Engineering A&I Assembly and Installation A&L Approach and Landing A&P Attitude and Pointing A&PS Administration and Program Support (MSFC Directorate) A&R Automation and Robotics A&RC Application and Resource Control A&TA Assembly and Test Area A&V Assembly and Verification A/A Air to Air A/C Air Conditioning A/C Aircraft A/C Associate Contractor A/D Analog to Digital A/E Activity Elements A/E Architectural and Engineering A/F Air-to-Fuel Ratio A/FM Air/Firing Mechanism A/G Air to Ground A/L Approach/Landing A/L Approach and Landing/Autoland A/L Airlock A/L Autoland AA Antenna Assembly AAA Avionics Air Assembly AAC Aft Access Closure AAFE Aeroassist Flight Experiment ABC Audio Bus Coupler ABCL As Built Configuration List ABHRS As Built Hardware Reporting System ABOLT Acquire Bolt AC Alternating Current AC Assembly Complete AC Comptroller Office ACBM Active CBM ACC Aft Cargo Carrier ACCMS Advanced Checkout, Control, and Maintenance System ACCS Advanced Checkout and Control System ACES Acoustic Containerless Experiment System ACIP Assembly Configuration and Integration Panel ACO Assembly and Checkout Officer ACP Automated Change Processing ACR Active Cavity Radiometer ACRIM Active Cavity Radiometer Irradiance Monitor ACRBC Acceptance, Checkout, Retest, and Backout Criteria ACRC Assured Crew Return Capability - Now ACRV ACRV Assured Crew Return Vehicle ACS Advanced Camera for Surveys (Hubble Space Telescope) ACS Atmosphere Control Systen ACS Attitude Control System ACSM ACS Moding ACTS Advanced Communications Technology Satellite ACU Arm Computer Unit ACU Arm Control Unit AD Active Device AD Aperture Door AD Attachment Device ADC Affiliated Data Center ADEOS Advanced Earth Observing Mission ADF Air Diffuser ADP Acceptance Data Package ADP Automated Data Processing ADPS Acceptance Data Package System ADS Attitude Determination System ADSF Advanced Directional Solidification Furnace AEA Antenna Electronics Assembly AEG AEG Telefunken AEPI Atmospheric Emission Photometric Imaging AERO Aerodynamic AERO Aerosurfaces AERO Atmospheric Flt Supt AES Analog Event System AES Atmosphere Exchange System AES Auger Electron Spectroscopy AESC Aerojet Electrosystems Company AESD Airlock External Stowage Devices AESE Airborne Electrical Support Equipment AET Aerosurface End-to-End Test AETL Approved Engineering Test Laboratory AEWG Active Experiment Working Group AF Aft Fuselage AF Airframe AF Air Force AF Audio Frequency AFA Airframe Assembly AFAD Armed Forces Acquisition Document AFALD Air Force Acquisition Logistics Division (WPAFB) AFB Air Force Base AFC Aerodynamic Flight Control AFC Automatic Flight Control AFC Automatic Frequency Control AFCE Automatic Flight Control Equipment AFCS Automatic Flight Control System AFD Aft Flight Deck AFD Assistant Flight Director AFDCP Aft Flight Deck Control Panel AFDO Aft Flight Deck Operator AFDPDB Aft Flight Deck Power Distribution Box AFE Aeroassist Flight Experiment AFE American Flight Echocardiograph AFEB Award Fee Evaluation Board AFEC Award Fee Evaluation Committee AFETR Air Force Eastern Test Range (ESMC preferred) AFETRM Air Force Eastern Test Range Manual AFF Acceptance and Ferry Flight AFFTC Air Force Flight Test Center (Edwards AFB) AFGE Association of Federal Government Employees AFGL Air Force Geophysics Laboratory AFGWC Air Force Global Weather Center AFI Air Force Instruction (Most AFRs have been changed to AFIs.) AFI Automatic Fault Isolation AFL Autoland Flight Tests AFLC Air Force Logistics Command AFM Air Force Manual AFO Announced Flight Opportunity AFO Announcement of Flight Opportunities AFP Air Force Program AFPD Authorization for Program Development AFPRO Air Force Plant Representatives Office AFR Air Force Regulation AFRPL Air Force Rocket Propulsion Laboratory (EAFB) AFRSI Advanced Flexible Reusable Surface Insulation AFS Air Force Standard AFSC Air Force Systems Command AFSCF Air Force Satellite Control Facility AFSCF Air Force Satellite/Spacecraft Control Facility AFSCN Air Force Satellite Control Network AFSIG Ascent Flight Systems Integration Group AFSSD Air Force Space Systems Division AFSWC Air Force Special Weapons Center (Holloman AFB) AFT Aerodynamic Flight Test AFT Atmospheric Flight Test AFT Autogenic Feedback Training AFTA Acoustic Fatigue Test Article AFTA Aft Frame Tilt Actuator AFTE Autogenic Feedback Training Experiment AFTEC Air Force Test and Evaluation Center AFV Antiflood Valve AFZES Analytical Float Zone Experiment System AG Artificial Gravity AG Attitude Gyro AGAA Attitude Gyro Accelerometer Assembly AGAP Attitude Gyro and Accelerometer Package AGB Adjustable Grapple Bar AGOSS Automated Ground Operations Scheduling System AHU Air Handling Unit AI Artificial Intelligence AIM Aeronomy of Ice in the Mesosphere AIM Automated Informed Maintenance AIMS Automated Informed Maintenance System AIO Analog Input/Output AIRS Atmospheric Infrared Sounder AIS Action Item Sheet AIS Airlock Illumination Subassembly AIS Analog-In Single-Ended AIST Agency of Industrial Science and Technology AIT Aeritalia AIU Abort Interface Unit AIU Avionics Interface Unit AJ Assembly Jig AKM Apogee Kick Motor A/L Approach and Landing A/L Autoland AL Air Lock AL/EMU Airlock/Extravehicular Mobility Unit ALAE Atmospheric Lyman Alpha Experiment ALAS Approach Landing Autopilot System (Subsystem) ALAS Automatic Landing Autopilot Subsystem ALC Aft Load Controller ALC Air Logistics Center ALC Audio Load Compensator ALC Augmented Landing Site ALC Automatic Level Control (Camera) ALC Automatic Light Control ALCA Aft Load Control Assembly ALCA Automatic Level Control Assembly ALDO Activity Level Dependent Operations ALE Airport Landing Equipment ALE Airport Lighting Equipment ALERT Acute Launch Emergency Reliability Tip ALGOL Algorithmic Language ALIO Activity Level Independent Operations ALM Alarm ALPHA Angle of Attack (Pitch) ALPHA Right Ascension ALPS Approach and Landing Procedures Simulator ALRUTS Automated Line Replaceable Unit Tracking System ALS Advance Logistics System ALS Advanced Launch System ALS Airlock System (ECLS) ALS Alternate Landing Site ALS Approach Landing System ALS Automatic Landing System ALSA Astronaut Life Support Assembly ALSARM Advanced Life Support Automated Remote Manipulator ALSE Astronaut Life Support Equipment ALSS Airlock Support System (Subsystem) ALT Alternate ALT Altimeter ALT Altitude ALT Approach and Landing Test ALTM Altimeter ALTR Approach and Landing Test Requirement ALU Arithmetic Unit AM Actuator Mechanism AM Administration and Management Operations (KSC Directorate) AM Alpha Meter AM Ammeter AM Amplitude Modulation AM Antenna Management AMA Air Material Area (now Air Logistics Centers) AMB Ambient AMC AMERICOM satellite AMC Automatic Mixture Control AMCA Aft Motor Control Assembly AMCP ADL Master Control Program AMDS Advanced Missions Docking Subsystem AMEC Aft Master Events Controller AMF Abort Motor Facility AMF Apogee Motor Firing AMF Astronaut Memorial Foundation AMG Activation Management Group AMI Absolute Memory Image AMI Airspeed Mach Indicator AMI Alpha/Mach Indicator AML Approved Materials List AMLC Asynchronous Multiline Controller AMOOS Advanced Maneuvering Orbit-to-Orbit Shuttle AMP Ampere AMPR Aeronautical Manufacturers Planning Report AMPR Aeronautical Manufacturers Progress Report AMPS Atmosphere, Magnetosphere, and Plasmas in Space AMPS Atmospheric Magnetospheric Plasma System AMPTE Active Magnetospheric Particle Tracer Explorers AMPU Automated Maneuver Planning Utility AMR Atlantic Missile Range AMRV Astronaut Maneuvering Vehicle AMS Acoustic Measurement System AMS Actuation Mechanism Subsystem AMS Amplifier AMS Amplifier Subsystem AMSU Advanced Microwave Sounding Unit ANSI American National Standard Institute AO Assembly Order AO Atomic Oxygen AOA Abort Once Around AOA Annual Operating Agreement AOH Assembly Operations Handbook AOP Assembly Ops AP Application Processor AP Associated Press APAS Androgynous Peripheral Attachment System APC Adaptive Payload Carrier APCS Automated Project Control System - ARTEMIS APCU Assembly Power Converter Unit APDS Androgynous Peripheral Docking System APFR Articulating Portable Foot Restraint API Application Programming Interface APID Applications Process Identification APM Advanced Pressurized Module APM Attached Pressurized Module APPCM Arm Pitch Plane Change Mode APS Acquisition Processor Subsystem APS Automated Payload Switch APS Auxiliary Power Supply AR Atmosphere Revitalization ARC Ames Research Center ARC Aggregation of Red Cells ARCU American-to-Russian Converter Units ARIS Active Rack Isolation System ARM Accident Report Meeting ARP Automated Release Processing ARS Air Revitalization System ARS Archive and Retrieval Subsystem (PPCU) ARTEMIS Project Management Software System - Metier Product ARTS Automated Resource Tracking System - ARTEMIS ASCII American Standard Code for Information Interchange ASCR Assured Safe Crew Return ASDA Area Smoke Detector Assembly ASE Airborne Support Equipment ASP Attitude Sensor Package ASRC Arctic Slope Regional Corporation ASRS Automated Support Requirements System ASSY Assembly AST Astro Star Tracker ASTER Advanced Spaceborne Thermal Emission and Reflection Radiometer ASTG Aerospace Test Group ATC Absolute Time Command ATCS Active Thermal Control System ATE Automated Test Equipment ATLAS Atmospheric Laboratory for Applications and Science ATMOS Atmospheric Trace Molecule Spectroscopy ATP Accelerated Training Program ATP Acceptance Test Procedure ATP Authorization to Proceed AWAD Assembly Work Authorization Document B B Bit B&P Budgetary and Planning B&W Black and White B-1 DIV B-1 Division (Rockwell) B/A Bank Angle B/A Barometric Altimeter B/A Buffer Amplifier B/C Bench Check B/L Baseline B/O Booster Orbiter B/O Breakout B/O Burnout B/SC Brake Skid Control B/SMPL Bits per Sample B/U Backup B/V Bleed Valve B/W Black and White B/sec Bits per Second BA Bank Angle BA Breathing Air BAC Boeing Aircraft Company BAC Booster Assembly Contractor BAC Buffer Access Card BACS Body Axis Coordinate System BAI Barometric Altitude Indicator BAIR Breathing Air BAL Balance BAN Budget Allocation Notice BARB Ballast Aerating Retrieval Boom BARO Barometer BARS Baseline Accounting and Reporting System BASD Ball Aerospace Systems Division BASIS Business and Support Information Services BASS Backup Avionics System Software BATT Battery BB Breadboard BBC Before Business Clearance BC Battery Charger BC Binary Counter BC Bus Coupler BCCT Break Control Command Transducers BCD Binary Coded Decimal BCE Backup Control Electronics BCE Bus Control Element BCFS Backup Flight Control System BCH Binary Coded Hexadecimal BCH Bose-Chaudhuri-Hocquenghem (Computer Code) BCN Beacon BCP Base Condemnation Percent BCP Benchmark Control Point BCR Bar Chart Report BCRD Basic Consolidated Requirements Document BCRT Binary Code Range Time BCT Bus Configuration Table BCU Bus Control Unit BCWP Budget Costs for Work Performed BCWS Budget Costs for Work Scheduled BD Band BD Binary Decoder BD Binary Digit BD Binary Discrete BD Board BDA Backup Drive Amplifier BDA Bermuda Island BDA Bermuda (STDN) BDA Blast Danger Area BDA Backup Drive Amplifier BDC Bi-Directional Converter BDC Bit Error Rate BDCF Baseline Data Collection Facility BDCR Baseline Document Change Request BDD Baseline Definition Document BDRT BFS Discrepancy Report Tracking BDT Block Data Transfer BDY Body BDYFLP Body Flap BECO Booster Engine Cutoff BER Bit Error Rate BESS Biological Experiment Scientific Satellite BESS Biomedical Experiment Scientific Satellite BESS Biomedical Experiment Support Satellite BEST Black Employee Strategy Team BEST Booster Exhaust Study Test BET Best Estimate of Trajectory BETA ANGLE Sideslip Angle BEWS Blast Environment Wave Simulator BF Beat Frequency BF Body Flap BFC Backup Flight Control BFC Backup Flight Controller BFC Body Flap Control BFCS Backup Flight Control System BFL Back Focal Length BFL Bakersfield (TACAN Station) BFO Beat Frequency Oscillator BFRP Boron Fiber Reinforced Plastics BFS Backup Flight System BFZES Breadboard Float Zone Experiment System BH/MP Breather Hose/Mouthpiece BHD Bulkhead BHN Brinell Hardness Number BHP Brake Horsepower BHS Base Heat Shield BIA Bus Interface Adaptor BIN Business and Information Network BIPROP Bipropellant BIO Bio Research Module BIO Biological BIO Bioseparation BIOMED Biological Medicine (Medical) BIOS Biological Satellite BIS Biocide Injection System BIT Binary Digit BIT Built-in Test BITE Built-in Test Equipment BIU Buffer Interface Unit BIU Bus Interface Unit BK Back BK Brake BKHD Bulkhead BLK Block BLOW Booster-Lift-Off Weight BLR Boiler BLS Bottom Left Side BLV Bleed Valve BLWR Blower BM Basal Metabolism BM Business (Branch) Manager BM Body Mounted BMA Body-Mounted Accelerometer BMAG Body-Mounted Attitude Gyro BMAP Buffer Map BMB Base Maintenance Building BME Bench Maintenance Equipment BMFT German D-1 Spacelab Payload BMMD Body Mass Measuring Device BMS Background Measurement Satellite BMU Bus Monitor Unit BN Ballistic Number BO Breakout Box BOB Best on Best BOC Base Operations Contract BOD Beneficial occupancy Date BOE Break of Entry BOF Beginning of File BOI Break of Integrity BOM Beginning of Month BOM Bill of Materials BOP Baseline Operations Plan BOPACE Boeing Plastic Analysis Capability for Engines BOS Backup Operating System BOS Bright Object Sensor BOT Beginning of Tape BOT BOTSWANA (STDN) BOW Bill of Work BP Back Pressure BP Bandpass BP Barber Pole BP Blood Pressure BP Boilerplate BPD Baseline Program Documentation BPI Bits per Inch BPM Beats per Minute BPMS Blood Pressure Measuring System BPR Bypass Ratio BPS Bits Per Second BPT Body Point BPV Bipropellant Valve BR Bit Rate BRAVO Business Risk and Value of Operation in Space BRCS Basic Reference Coordinate System BRG Bearing BRK Brake BRKT Bracket BRM Biological Research Module BRPM Breath Rate per Minute BRRS Banana River Repeater Station BRS Bottom Right Side BRT Bright BS Block Specification BSC Brake Skid Controller BSDP Booster Stage Discharge Pressure BSE Booster Systems Engineer BSI Basic Shipping Instructions BSI Boeing Services International, Inc. BSM Booster Separation Motors BSM Booster separation motor BSR Basic System Release BSR Bite Status Register BSRM Booster Solid Rocket Motor BSS Backup System Services BSTR Booster BT Burn Time (Engine) BTC Bus Tie Contractor BTC Binary Time Code BTMS Body Temperature Measuring System BTR Burn Time Remaining BTR Boom Time Remaining BTR Bus Transfer BTU Bus Terminal Unit Btu British Thermal Unit BU Backup BUC Backup Computer BUC Buckhorn, CA (GSTDN) BUFF Buffer BUOU Backup Optical Unit BUR Backup Rate BW Bridgewire BW Bandwidth BX Box BY Budget Year BYP Bypass C C Candle C Capacitance C Celsius C Centigrade C Coefficient C Complete C Constant C One Hundred c Cycle C&D Control and Display C&DH Command and Data Handling C&DS Command and Data Simulator C&M Control and Monitoring C&T Communications and Tracking C&TSS Communication and Tracking Subsystem C&W Caution and Warning C3VP Canadian CloudSat/CALIPSO Validation Project C-Band 3900 to 6200 MHz C-BD C-Band C-C Carbon-Carbon C-to-C Computer-to-Computer C/C Combustion Chamber C/D Countdown C/F Center Frequency C/L Checklist C/L Closed Loop C/O Changeout C/O Checkout C/O Contamination/Overpressure C/O Cutoff C/P Cold Plate C/R Commutation Rate C/S Counts per Second C/SCSC Cost/Schedule Control Systems Criteria C/W Carrier Wave C/W Caution and warning CA California CA Carrier Aircraft CA Contingency Abort CA Cone Angle CA Contract Award CA Corrective Action CA Cost Account CAB Cabin CAB Cabinet CAB Civil Aeronautics Board CAB Cost Audit Board CACB Center Aisle Connector Bracket CACC Communications and Configuration Console CACON Cargo Container CAD Computer Aided Design CADE Controller/Attitude-Direct Electronics CADS Command and Data Simulator CADSI Communications and Data Systems Integration CADU Control and Display Unit CAIB Columbia Accident Investigation Board CAL Calibrate, Calibration CAL Cornell Aeronautical Laboratory cal Calories CALC Calculate CALIPSO Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation CAM Carrier Aircraft Modification CAM Centrifuge Accommodations Module CAM Computer Aided Manufacturing CAM Computer Annunciation Matrix CAM Content Addressable Memory CAMR Camera CAN Certification Analysis Network CAP Capacitor, Capacity CAP CCMS Application Programs CAP Computer Application Program CAP Contractor Acquired Property CAP Cost Account Package CAP Crew Activity Plan CAPCOM Capsule Communicator CAPPS Checkout, Assembly and Payload Processing Services CAPRI Captive Reset Igniter CAPS Common Attitude Pointing System CAPS Corrective Action Problem System CAPS Crew Activity Planning System CAPS Crew Altitude Protection Suit CAPSIM Captive Simulation CAR Certification Approval Request CAR Configuration and Acceptance Review CAR Corrective Action Request CARID Customer Acceptance Review Item Disposition CARR Customer Acceptance Readiness Review CAS Calibrated Airspeed CAS Command Augmentation System CAS Control Augmentation System CASO Cancellation Addendum Sales Order CASP CDS Application Support Programs CASS CITE Augmentation Support System CATEG Category CAU Command Acquisition Unit CAU Command Activation Unit CAU Customer Acquisition Unit CAUSE Computer Aided User Oriented System Evaluation CAUT Caution CB Center of Buoyancy CB Circuit Breaker CB Constant Bandwidth CB/ac Circuit Breaker (ac only) CB/dc Circuit Breaker (dc only) CBA C-Band Transponder Antenna CBA Collective Bargaining Agreement CBC Complete Blood Count CBE Connector Bracket, Experiment CBIL Common and Bulk Items List CBM Common Berthing Mechanism CBP Connector Bracket Power CBrF3 Bromotrifluoromethane (Fire-Extinguishing Material) CBS Connector Bracket Signal CBSA Cargo Bay Stowage Assembly CBV Cabin Bleed Valve CBW Constant Bandwidth CBX C-Band Transponder CC Carbon-Carbon CC Channel Controller CC Chief Counsel (KSC Directorate) CC Communications Control CC Cost Center CC Crew Compartment CC Crew(s) Certified CCA Communications Carrier Assembly CCA Contract Change Authorization CCA Coolant Control Assembly CCAFS Cape Canaveral Air Force Station CCAS Cape Canaveral Air Station CCATS Command, Communication, and Telemetry System CCB Configuration Change Board CCB Change Control Board CCB Configuration Control Board CCBD Configuration Control Board Directive CCC Complex Control Center CCC Central Computer Complex CCC Communication(s) Control Console CCC Controller Checkout Console CCC Contaminant Control Cartridge CCD Charge Coupled Device CCD Checkout Command Decoder CCD Constants Change Display CCDR Contractor Critical Design Review CCE Computer Command Engineer CCF Converter Compressor Facility CCFF Cape Canaveral Forecast Facility CCIR International Radio Consultative Committee CCL Closed Circuit Loop CCL Commonality Candidate List CCL Configuration Control Logic CCM Controlled Carrier Modulation CCM Crew/Cargo Module CCME Contract Change Mass Estimate CCMS Checkout, Control and Monitor System CCMS Checkout, Control, and Monitor Subsystem (LPS) CCMS Command Control and Monitor System CCN Contract Change Notice CCN Contract Change Negotiation CCOH Corrosive Contaminants, Oxygen, and Humidity CCP Center Console Panel CCP Configuration Control Phase CCP Commercial Change Proposal CCP Cost Control Program CCP Charge Capacitance Probe CCP Contract Change Proposal CCP Configuration Control Panel CCP Configuration Change Point CCP Computer Control Panel CCR Configuration Change Request CCR Contractor Change Request CCR Control Center Rack CCR Corner Cube Retroflectors CCRA Cape Canaveral Reference Atmosphere CCRF Consolidated Communication Recording Facility CCS Central Control Section CCS Central Control Station CCS Command and Communication System CCS Command and Control Subsystem CCS Complex Control Set CCS Computer Core Segment CCS Console Communication System CCS Contamination Control System CCSCS Consultive Committee for Space Data Systems CCSSO Council of Chief State School Officers CCT Computer Compatible Tape CCT Cost Committment Team CCTE Conditioned Cargo Transport Equipment CCTV Closed Circuit Television CCU Camera Control Unit CCU Central Control Unit CCU Communications Carrier Unit CCU Crewman Communications Umbilical CCV Chamber Coolant Valve CCVA Chamber Coolant Valve Actuator CCW Counterclockwise CCIM Command Computer Input Multiplexer CD Center Director (KSC Directorate) CD Change Directive CD Coefficient of Drag CD Command Decoder MDM CD Contractual Data cd Candella (Luminous Intensity) CDA Command and Data Acquisition CDA Critical Design Audit CDB Central Data Buffer CDB Command Data Base CDBFR Common Data Buffer CDC Confined Detonating Cord CDC Control Data Corporation CDC Countdown Clock CDCE Cosmic Dust Collection Experiment CDCR Contractor Drawing Change Request CDDF Center Director's Discretionary Fund CDDS Command and Data System CDDT Countdown Demonstration Test CDF Cable Distribution Frame CDF Central Data Facility CDF Circuit Design Fabrication CDF Confined Detonating Fuse CDF Cool-Down Facility CDF&TDS Circuit Design, Fabrication, and Test Data Systems CDH Constant Delta Height CDI Course Deviation Indicator CDM Communications/Data Manager CDMS Command and Data Management Subsystem CDMS Command and Data Management System CDN CDR Discrepancy Notice CDNB CDR Discrepancy Notice Board CDOS Customer Data and Operations System CDP Command Data Processor CDPIS Command Data Processing and Instrumentation System CDQR Critical Design and Qualification Review CDR Cleaning, Decontamination Request CDR Commander CDR Critical Design Review CDRL Contract Data Requirements List CDRR Component Design Requirements Review CDRR Contract Documentation Requirements Records CDS Central Data Subsystems (LPS) CDS Central Data System CDS Closeout Door System CDS Collision Detector System CDS Control Data Corporation CDS Control Data System CDSC Communications Distribution and Switching Center CDT Central Daylight Time CDT Command Descriptor Table CDT Compressed Data Tape CDT Configuration Data Table CDT Countdown Time CDU Computer Display Unit CDU Control and Display Unit CDU Coupling Data Unit CDU Coupling Display Unit CDU CRT Display Unit CDW Command Data Word CDW Computer Data Word CE Change Evaluation CE Civil Engineering CE Control Element CE Cost Element CE Current Expendable CE&IS Combined Elements and Integration Systems CEA Control Electronics Assembly (for MMU) CEC Control Electronics Container CEC Control Encoder Coupler CECP Compatibility Engineering Change Proposal CEDC Cycling Error Detection Code CEI Configuration End Item CEI Contract End Item CEIAC Coastal Engineering Information Analysis Center CEIT Crew Equipment Integration Test CEIT Crew Equipment Interface Test CELSS Controlled Environment and Life Support System CELV Complementary Expendable Launch Vehicle CEP Circular Error Probable CEQ Council on Environmental Quality CER Cost Estimating Relationship CERT Certification CERV Crew Emergency Return Vehicle CES Control Electronics System CES Crew Escape System CESC Canadian Space Agency Engineering Support Center CETA Crew and Equipment Translation Aid CETF Critical Evaluation Task Force CEU Control Electronics Unit CEV Crew Exploration Vehicle CF Carrier Frequency CF Center Forward CF Centrifugal Force CFD Computational Fluid Dynamics CFD Continuous Flow Diffusion CFD Converter, Frequency to dc Voltage CFE Contractor Furnished Equipment CFES Continuous Flow Electrophoresis System CFI Card Format Identifier CFLSE Critical Fluid Light Scattering Experiment CFM Customer Furnished Material CFM Cubic Feet per Minute CFMF Crip Flow Management Facility CFP Conceptual Flight Profile CFR Code of Federal Regulation CFRP Carbon Fiber Reinforced Plastics CFSTI Clearinghouse for Scientific and Technical Information (now NTIS) CFT Common Facilities Test CFU Colony Forming Unit CFY Company Fiscal Year CG Center of Gravity CGAU Cabin Gas Analysis Unit CGC Command Guidance Computer CGCD Crossed Grid Charge Detector CGF Crystal Growth Furnace CGG Contingency Gravity Gradient CGP Central Grounding Point CGSS Cryogenic Gas Storage Subsystem CH Channel CH4 Methane CHAMP Comet Halley Active Monitoring Program CHAN Channel CHAR Character CHASE Coronal Helium Abundance Spacelab Experiment CHCS Cabin Humidity Control Subsystem CHeCS Crew Health Care System CHG Change CHG Charge CHGR Charger CHL Certified Hardware List CHL Channel CHMBR Chamber CHR Cooper-Harper Rating CHROMEX Chromosome and Plant Cell Division in Space CHS Collimated Hole Structure CHUTE Parachute CHX Cabin Heat Exchanger CI Certification Inspection CI Color Interior Film CI Configuration Inspection CI Configuration Item CI Continuous Interlock CI Course (deviation display) Invalid CI Crew Interface CIA Control Interface Assembly CIAP Climatic Impact Assessment Program CIAR Change Implementation/Assessment Record CIB Change Impact Board CIB Change Implementation Board CIC Command Interface Control CIC Communications Interface Coordinator CIC Continuing Improvement Council CIC Control and Information Center CIC Crew Interface Coordinator CICA Competition in Contracting Act CICC Cargo Integration Control Center CICU Computer Interface Conditioning Unit CICU Computer Interface Control Unit CID Charge Injection Device CID Computer Interface Device CIDL Configuration Item Data List CIDR Critical Intermediate Design Review CIE Communications Interface Equipment CIE Computer Interface Electronics CIF Central Instrumentation Facility CIFS Critical Initial Flaw Size CIG Cable Integrity Group CIG Communications and Interface Group CIL Critical Items List CIM Computer Input Multiplexer CIN Center Information Network CIN Change Identification Number CINDAS Center for Information and Numerical Data Analysis and Synthesis CIP Coordinated Instrument Package CIP Customer Integration Panel CIR Cargo Integration Review CIR Change Incorporation Record CIR Circle CIR Circulate CIR Configuration Inspection Report CIRC Circularization Burn, OMS2 CIRCUM Circumference CIRHS Critical Items and Residual Hazards List CIRRIS Cryogenic Infrared Radiance Instrument for Shuttle CIS Central Integration Site CIS Change Impact Summary CIS Communication Interface System CIS Component Identification Sheet CIS Contractor's Information Submittal CIS Customer Information System CISS Centaur Integrated Support Structure CIT Critical Item Tag CITE Cargo Integration Test Equipment CIU Computer Interface Unit CIU Communications Interface Unit CIU Controller Interface Unit CIV Critical Ionization Velocity CIVT Cargo Interface Verification Test CJC Cold Junction Compensator CK Check CKAFS Cape Kennedy Air Force Station (Changed to CCAFS) CKPT Checkpoint CKRA Cape Kennedy Reference Atmosphere (Changed to CCRA) CKS Checks CKT Circuit CL Centerline CL Close (Closed) CL Closed Loop CL Closed Loop Control Logic CL Cluster CL Coefficient of Lift CL Commonality List Class Classification CLC Change Letter Control CLC Critical Load Cycle CLCS Checkout and Launch Control System CLDST Closed Loop Dynamic Stability Test CLG Ceiling CLIN Contact Line Item Number CLIP Combined Laser Instrumentation Package CLM Care Logic Module CLMC Central Logistics Management Center CLN Change Leaders Network CLNR Cleaner CLOC Canadian Logistics Operation Center CLR Clear CLRB Cost Limit Review Board CLS Contingency Landing Site(s) CLSO Contingency Landing Support Officer CLT Closed Loop Test CLUSTER International Solar Terrestrial Physics Program CLV Crew Launch Vehicle CM Cargo Management CM Center of Mass CM Common Module CM Configuration Management CM Consumables Management CM Control Monitor CM Crew Module cm Centimeter CM&S Communications Maintenance and Storage CMA Configuration Management Accounting CMA Cylindrical Mirror Assembly CMACS Central Monitor and Control System CMAO Contract Management Assistance Officer CMAT Compatible Materials (List) CMC Command Module Computer CMC Crew Module Computer CMD Command CMD Contamination Monitor Package CMD DCDR Command Decoder CMG Control Moment Gyroscope CMM Condition Monitored Maintenance CMN Crewman CMO Configuration Management Office CMOS Complementary Metal Oxide Silicon CMP Configuration Management Plan CMPR Compare CMPRT Compartment CMPTD Computed CMPTR Computer CMPTR ACTY Computer Activity CMR Center Materials Representative CMRB Contractor Material Review Board CMRR Common Mode Rejection Ratio CMS Competency Management System CMS-2 Cambridge Monitoring System (IBM Computer Program) CMSI Checkout/Control and Monitor Subsystem Interface CMTS Computerized Maintenance Test System CMV Common Mode Voltage CN Change Notice CNDS Condensate CNRL Communications and Navigation Research Laboratory CNSL Console CNTL Control CNTR Counter CNTRL Control CNTRL Controller CNWDI Critical Nuclear Weapons Design Information CO Carbon Monoxide CO Cargo Operations (KSC Directorate) CO Change Order CO Contracting Officer CO Cutoff CO2 Carbon Dioxide COA Center Operations Area COAS Course Optical Alignment Sight COAS Crew(man) Optical Alignment Sight COAS Crewman optical alignment sight COAX Coaxial, Coaxial Cable COB Communications Office Building COBE Cosmic Background Explorer COBOL Common Business Oriented Language COC Close-Open-Close COD Center Operations Directorate (JSC) COE Corps of Engineers COF Central Operations Facility COF Columbus Orbital Facility CoF Construction of Facilities C of F Construction of Facilities C of F Cost of Facilities COFI Checkout and Fault Isolation (on Board) COFR Certificate of Flight Readiness COFW Certificate of Flight Worthiness COI Coast Orbital Insertion COI Composite Optics, Inc. COIM Checkout Interpreter (Software) Module COL Checkout Language COL Coast Orbital Insertion COLD-SAT Cryogenic on Orbit Liquid Depot-Storage, Acquisition, Transfer COLM Column COM Common, Commonality COM Computer Output Microfiche COM-M Common Mode COMAS Combined Orbital Maneuvering and Abort System COMAT Compatibility of Materials COMB Combustion COMEC Communications Security COMEDS Continental U.S. Meteorological Data System COMM Communications COMMAND Computer Command Engineer COMP Compass COMP Compensate COMP Component COMP Computation of Rendezvous Targeting COMP Computer COMPEN Compensator COMPL Completed COMPOOL Common Data Pool COMPR Compress, Compressor COMPT Compartment COMR&DSAT Communication Research and Development Satellite COMSAT Communications Satellite COMSEC Communications Security COMTEL Compton Telescope CON Contact CONCN Concentration COND Condenser COND Condition, Conditioner CONDR Conditioner CONF Conference CONFIG Configuration CONN Connect, Connector CONS Console CONSTR Construct, Construction CONT Container CONT Contingency CONT Continue, Continued, Continuous CONTAM Contaminate CONTIG Contiguous CONTR Control, Controller CONUS Continental United States CONV Converter COOP Cooperative COORD Coordinate COP Contingency Operations Plan COP Co-orbiting Platform COPV Composite Overwrapped Pressure Vessel COQ Certificate of Qualification COR Contracting Officer Representative CORE Common Operational Research Equipment COS Carry-on Oxygen System COS Console Operating System COS Co-orbiting Satellite COS Cosine COSATI Committee on Scientific and Technical Information COSI Closeout System Installation COSMIC Coherent Optical System of Modular Imaging Collectors COSPAR Committee on Space Research COSS Centaur Operations at the Space Station COSTA Cost Accounting (Code) COTR Contracting Officer's Technical Representative COTS Commercial Off the Shelf COV Cutoff Valve CP Candle Power CP Cargo Program Office (KSC) CP Cargo Projects Office (KSC) CP Center of Pressure CP Chemically Pure CP Circular Pitch CP Cold Plate CP Console Processor CP Control Panel CP Control Point CP-DPO Deployable Payloads Projects Office (KSC) CP-FEO Cargo Facilities and GSE Projects Office (KSC) CP-PCO Cargo Projects-Program Control Office CP-SPO Spacelab Projects Office (KSC) CPA Contingency Planning Aid CPA Critical Path Analysis CPAF Cost Plus Award Fee CPC Central Planning Center CPC Characteristics Properties Code CPC Computer Program Component CPCB Crew Procedures Control Board CPCEI Computer Program Contract End Item CPCI Computer Program Change Instruction CPCI Computer Program Configuration Item CPCL Computer Program Change Library CPCL Computer Program Control Library CPCR Computer Program Change Request CPCR Crew Procedures Change Request (Form 482) CPD Converter, Pulse to dc Voltage CPD Crew Passive Dosimeter CPD Crew Procedures Division CPDDS Computer Program Detail Design Specification CPDR Contractor's Preliminary Design Review CPDS Computer Program Design (or Development) Specification CPDS Crew Procedures Documentation System CPE Change Package Engineer CPE Chief Program Engineer CPE Continuous Particle Electrophoresis CPEI Computer Program End Item CPES Crew Procedures Evaluation (Evaluator) Simulator CPF Cargo Processing Facility CPF Central Processing Facility CPF Cost Per Flight CPFF Cost Plus Fixed Fee CPG Change Planning Group CPI Cost Performance Index CPI Cross Pointer Indicator CPIF Cost Plus Incentive Fee CPL Capillary Pump Loop CPL Couple CPLT Complete CPM Computer Program Module CPM Critical Path Method CPM Cycles per Minute CPMP Crew Procedures Management Plan CPP Competitive Placement Plan CPR Critical Problem Report CPS Canadian Payload Specialist CPS Cycles Per Second CPSE Common Payload Support Equipment CPSS Cold Plate Support Structure CPSS Critical Phase System Software CPT Cargo Processing Technician CPT Computer Program Tapes CPU Central Processing Unit CPU Computer Printer Unit CQCM Cryogenic Quartz Crystal Microbalance CQDR Critical Qualification Design Review CR Card Reader CR Certification Requirement CR Change Request CR Configuration Review CR Control Room CR Crew CR&T Command, Ranging, and Telemetry CR/DIR Change Request Directive CRAF Comet Rendezvous Asteroid Flyby CRAS Cost Reduction Alternative Study CRB Change Review Board CRBD Change Review Board Directive CRC Contractor Recommended Code CRC Cost Reduction Curve CRD Change Request Disposition CRDG Contamination Requirements Definition Group CRDP Computer Resources Development Plan CRES Corrosion Resistant Steel CRG Change Review Group CRG Correspondence Review Group CRIS Calibration Recall and Information System CRISP Computer Resources Integrated Support Plan CRIT Critical CRM Chemical Release Module CRMD Computer Resources Management Data CRN Cable Routing Rotation CRN Contract Revision Number CRO Cathode Ray Oscillograph(s) or Oscilloscopes CRP Configuration Requirements Processing CRPL Cosmic Ray Physics Laboratory CRR Computer Run Report CRR Critical Requirements Review CRS CO2 Reduction Subsystem CRS Course CRS Cross CRSFD Crossfeed CRSI Ceramic Reusable Surface Insulation CRSVR Crossover CRT Cathode-Ray Tube CRTG Cartridge CRW Control Read/Write CRYO Cryogenic CRYT Cryogen Tank CS Change Status CS Checkout Station CS Clean Sheet CS Common Set CS Communications System CS Consumables Status CS Control Segment CS Core Segment CS Crew Station CS Spacelab Operations Directorate CS STS Cargo Operations (KSC Directorate) CSA Canadian Space Agency CSA Cyclic Strain Attenuator CSAA Committee on Space Astronomy and Astrophysics CSAM Crinkled Single Aluminized Mylar CSAS Computerized Status Accounting System CSAT Combined Systems Acceptance Test CSC Computer Sciences Corporation CSC Conical Shaped Charge CSC Contingency Support Center (CCAFS) CSC Cosecant Computing Amplifier CSCB Contractor's Summary Cost Breakdown CSCSAT Commercial Synchronous Communication Satellite CSD Chemical Systems Division CSD Control System Development CSD Crew Systems Division CSDD Control Systems Development Division (JSC) CSDF Central Source Data File CSDL Charles Stark Draper Laboratory (MIT) CSDT Computer Software Data Tapes CSE Catalytic Surface Effects Experiment CSE Common Support Equipment CSE Communications Systems Engineer CSE Computer Support Equipment CSE Configuration Switching Equipment CSF Central Supply Facility CSF Cost Sensitivity Factor CSI Coelliptic Sequence Initiation CSI Controls-Structures Interactions CSI Control Servo Input CSI Crew Software Interface CSIR Computer Systems (Hardware/Software) Integration Review CSIU Core Segment Interface Unit CSL Command Signal Limiter CSL Computer Status Lights CSL Crew Systems Laboratory CSM Command Service Module CSM Common Support Module CSM Computer Status Matrix CSOC Consolidated Space Operations Center CSOP Crew Systems Operating Procedures CSP Computer Support Program CSPU Core Segment Processing Unit CSR Certification Status Report CSR Check Signal Return CSR Crew Station Review CSRP Computers and Software Review Panel CSS Computer Subsystem CSS Control Stick Steering CSS Core Segment Simulator CSSA Coarse Sun Sensor Assembly CSSE Control System Simulation Equipment CST Central Standard Time CST Combined Systems Test CST Contract Supplemental Tooling CST Crew Station Trainer CST Crew Systems Trainer (One-G Trainer) CSTA Crew Software Training Aid CSTR Canister CSTS Cryogenic Storage and Transfer System CT Crawler Transporter CT Current Transformer CTA Computer Technology Associates (GSFC) CTA Controlled Thrust Assembly CTC Camera, Timing, and Control CTC Chief Test Conductor CTC Core Technical Capabilities CTE Central Timing Equipment CTI Critical Transportation Item CTIS Crawler Transporter Intercom System CTL Central or Control CTL Canoga Test Laboratory CTM Crystalline Transitional Material CTM Contract Technical Manager CTN Certification Test Network CTP Cyclic Time Processor CTP Communications Timing Procedure CTPD Crew Training and Procedures Division (JSC) CTR Contract Technical Representative CTRS Component Test Requirements Specifications CTS Canadian Technology Satellite CTS Communications and Tracking System CTS Computer Test Set CTS Computerized Training System CTSD Computer Test Sequences Document CTSD Coordinate Transformation System CTTB Checkout Techniques Test Bed CTU Central Timing Unit CTWT Counterweight CU Control Unit cu Cubic CUB Commonality Usage Board CUC Computer Usage Control CUDS Cumulative Data Statistics CUE Common Usage Equipment CUF Cross Utilization File CUIL Common Usage Item List CUM Cumulative CUP Commonality Usage Proposal CV Check Valve CV Coefficient of Variation CV Deployable Payloads Operation (KSC CO Dir.) CV Expendable Vehicles Operations (KSC Directorate) CVAD Converter, Voltage, ac to dc CVAS Configuration Verification Accounting System CVDA Converter, Voltage Discrete, ac CVE Complete Vehicle Erector CVM Control Valve Module CVR Change Verification Record CVR Configuration Verification Review CVRD Converter, Variable Resistance, to dc Voltage CVT Communications Vector Table CVT Concept Verification Testing CW Clockwise CW Command Word CW Continuous Wave CWA Caution and Warning Annunciator CWA Clean Work Area CWA Controlled Work Area CWE Caution and Warning Electronics CWEA Caution and Warning Electronic Assembly CWEU Caution and Warning Electronics Unit CWFSP Caution and Warning/Fire Suppression Panel CWG Constant Wear Garment CWLM Caution and Warning Limit Module CWS Caution and Warning Status CWS Caution and Warning System CWSU Caution and Warning Status Unit CWSU Condensate Water Servicing Unit CX Color Exterior Film CY Calendar Year CY Cycle CYL Cylinder D D Deck D Deliver (Delivery) D Delta D Down D Drag D&C Display and Control (C&D preferred) D&CS Display and Controls Subsystem D&O Description and Operations D&P Drain and Purge D&PD Definition and Preliminary Design D&PS Design and Performance Specification D&R Definition and Requirement D/A Digital to Analog D/C Displays/Controls D/L Data Link D/L Deorbit/Landing D/L Downlink D/L Downlist D/S Downstream D/VD Data/Voice Data DA Data Acquisition DA Deployment Assembly DA Distribution Assembly DA Double Amplitude DA&D Data Acquisition and Distribution DAAWG Disability Awareness and Action Working Group DAB Data Acquisition Bus DABS Discrete Address Beacon System DAC Data Acquisition and Control DAC Data Acquisition Camera DAC Digital to Analog Converter DAC Digital to Analytical Conversion DACB Data Acquisition and Control Buffer DACBU Data Acquisition and Control Buffer Unit DACS Data Acquisition and Control System DACS Digital Acquisition and Control System DACT Disposable Absorption Collection Trunk DADE Data Acquisition and Decommutation Equipment DADS Dual Air Density Satellite DAE Data Acquisition Equipment DAF Data Acquisition Facility DAF Data Analysis Facility DAFT Data Acquisition Frequency Table DAIS Data Avionics Information System DAIU Docked Audio Interface Unit DAL Data Accession List DAL Data Acquisition List DAL Data Aided Loop DAM Double Aluminized Mylar DAM Driver Amplifier Module DAP Data Acquisition Plan DAP Data Analysis and Presentation DAP Digital Autopilot DAR Data Aided Receiver DAR Deviation Approval Request DAR Digital Autopilot Requirements DAR Drawing Analysis Record DARPA Defense Advanced Research Projects Agency DARS Data Acquisition and Reduction System DART Days Away, Restricted and Transferred DART Demonstration of Autonomous Rendezvous Technology DARTS Digital Automated Radar Tracking System DAS Data Acquisition System DAS Data Analysis Station DAS Digital Address System DAS Digital Avionics System DAS Documentation Accountability Sheet DASA Dual Aerosurface Servo Amplifier DATE Dynamics, Acoustics, and Thermal Environment DAU Data Acquisition Unit DAU Digital Adapter Unit DAV Data Available DAVL Data Available-Low DB Data Base DB Data Bus DB Deadband DB Design Baseline DB Distribution Box DB Dry Bulb dB Decibel DBC Data Bus Control DBC Data Bus Coupler DBCI DB with Respect to a Circular Polarized Antenna DBE Data Bus Element DBFN Data Bus File Number DBFN Data Base File Number DBG Data Bus Group DBL Double DBGMP Data Bus Generation and Maintenance Package DBIA Data Bus Interface Adapter DBIA Data Bus Isolation Amplifier DBIU Data Bus Interface Unit DBS Data Base System dBM Decibels Referred to 1 Milliwatt DBN Data Bus Network DBP Design Baseline Program DBRN Data Bank Release Notice DBM Data Base Management DBW Data Bus Wire dBW Decibels Referred to 1 Watt DBUR Data Bank Update Request DBIA Data Bus Isolation Amplifier DBN Data Bus Network DC Data Coordinator DC Development-Center DC Display Coupler dc Direct Current DCA Defense Communication Agency DCA Design Change Authorization DCA Digital Command Assembly DCA Distribution Control Agency DCAA Defense Contract Audit Agency DCAR Design Corrective Action Report DCAS Data Collection and Analysis System DCAS Defense Contract Administration Services DCC Data Computation Complex DCC Document Control Center DCCU Digital Command and Control Unit DCCU Digital Communications and Control Unit DCCU Display Computer Control Unit DCE Drop Combustion Experiment DCIB Data Communication Input Buffer DCIM/DSCIM Display System Computer Input Multiplexer DCIU Digital Control and Interface Unit DCKNG Docking DCL Document Change List DCM Direction Cosine Matrix DCM DECOM Control Memory DCM Display and Control Module DCMB Development Configuration Management Board DCN Design Change Notice DCN Document Change Notice DCN Drawing Change Notice DCNP Document Change Notice Proposal DCO Detailed Checkout DCOP Detailed Checkout Procedures DCOP Displays, Controls, and Operations Procedures DCP Data Collection Platform DCP Depot Condemnation Percent DCP DEU Control Program DCP Development Cost Plan DCPEI DEU Control Program End Item DCR Design Change Request DCR Design Certification Review DCR Document Change Record (or Review) DCR Design Concern Report DCS Data Communication System DCS Data Control System DCS Design Communication System DCS Design Criteria Specification DCS Detail Checkout Specification(s) DCS Digital Command System (Subsystem) DCS Display and Control System DCS Document Control System DCS Dual Checkout Station DCSI Data and Control Signal Interface DCSP Digital Control Signal Processor DCSU Digital Computer Switching Unit DCU Digital Computer Unit DCU Display and Control Unit DCV Direct Current Volts DD Data Depository DD Mechanical and Facilities Engineering (KSC DE Dir.) DD Directives Documentation DD Dedicated Displays DD Data Display DD Decoder Driver DD&CS Dedicated Display and Control Subsystem DD/HH:MM:SS Day/Hour:Minute:Second DDA Digital Differential Analyzer DDA ICD Departure Authorization DDAS Digital Data Acquisition System DDC Defense Documentation Center DDC Data Distribution Center DDC Digital Data Cell DDCU Dc to DC Converter Unit DDD Display Decoder Drive DDD Design Definition Document DDDL Digital Data Downlink DDDU Digital Decoder Driver Unit DDI Dedicated Display Indicator DDI Discrete Data input DDI Discrete Digital Input DDIS Data Depository Index System DDL Data Downlink DDM Data Display Module DDM Data Display Monitoring DDM Discrete Data Management DDMS DOD Manager for Space Shuttle Support DDO Discrete Digital Output DDP Design Development Plan DDP Digital Data Processing (Processor) DDPC Digital Data Processing Center (Complex) DDPF Dedicated Display Processing Function DDPS Digital Data Processing System DDR Data Discrepancy Report DDR Design Development Record DDR Detail Design Review DDS Documentation Distribution System DDS Data Display System DDS Detailed Design Specification DDT&E Design, Development, Test, and Engineering/Evaluation DDT&E Design, Development, Test, and Evaluation DDTF Dynamic Docking Test Facility DDTS Dynamic Docking Test System DDU Decommutator Distribution Unit DDU Data Display Unit DDU Display Driver Unit DE Design Engineering (KSC Dir.) DE Doppler Extractor DE Dynamics Explorer DEA Deployed electronics assembly DEACT Deactivate DEC Declination DECL Direct Energy Conversion Laboratory (JSC) DECOM Decommutate, Decommutator DECR Decrease DECS Civil Engineering Office at Vandenberg DECU Data Exchange Control Unit DED Dedicate, Dedicated DEDA Data Entry and Display Assembly DEE Digital Events Evaluator DEF Definition DEFL Deflect DEG Degree DEI Design Engineering Identification DEIS Design Engineering Inspection Simulation DEIS Design Evaluation Inspection Simulator DEL Deliver, Delivery DEL Deorbit, Entry, and Landing DELTA-T Difference in Temperature DEMOD Demodulate, Demodulator DEMUX Demultiplexer DEORB Deorbit DEPL Deploy DEPRESS Depressurize DEPT Department DER Drawing Error Report DERIGID Derigidize DES Data Exchange System DES Descend, Descent DESAT Desaturated DESC Descent DESIG Designate DESPOT Design Performance Optimization DEST Destination DET Detent DET Detail DETN Detection DETR Detector DEU Display Electronic(s) Unit DEV Develop, Development DEVN Deviation DEW Distant Early Warning DF Development Flight DF Development-Forward DF Direction Finder (Finding) DF Disassembly Facility DF Display Functions DF-SPE-A Shuttle Project Engineering Office DFCS Digital Flight Control Software (System) DFE Data Flow Engineer DFE Direction Finding Equipment DFG Display Format Generator DFI Development Flight Instrumentation DFR Defrost DFRC Hugh L. Dryden Flight Research Center DFRF Dryden Flight Research Facility DFRN Differential DFRN PRESS Differential Pressure DFS Directional Finding System DFS Dynamic Flight Simulator DFVLR Deutsche Forschungs-und Versuchsanstalt Luft-und Raumfahrt Federal German Aerospace Research Establishment DG Display Generator DH Decision Height DHA Design Hazards Analysis DHE Data Handling Electronics DHS Discrete Horizon Sensor DI Data Integrator DI Development Integration DI Discrete Input DI Display Interface DI Display Interface Processor (Software Functional Element) DIA Diameter DIAG Diagonal DIAGN Diagnose DIDS Defense Integrated Data System DIF Difference DIF Discrete Increment Filter DIFF Differential DIGI Digital DIH Discrete Input High DIL Deliverable Items List DIL Discrete Input Low DIM Design Interface Meeting DIMEN Dimension DIP Designated Inspection Point DIP Display Input Processor DIP Display Interface Processing (Processor) DIPEC Defense Industrial Plant Equipment Center DIPL Display Initial Program Load DIR Direct DIR Document Information Record DIS Documentation Index System DIS Disagree DISAP Disapproved DISASSY Disassembly DISC Discone DISC Disconnect DISC Discrete DISCH Discharge DISENG Disengage DISP Dispenser DISP Display DIST Distribution DIT Dynamic Integrated Test DIU Data Interface Unit DIU Digital Interface Unit DIV Division DIT Data ID Table DIT Dynamic Integrated Test DISTR Distributor DK Deck DK Display/Keyboard DK Docking DL Development-Left DL Downlink DL Electronics Engineering (KSC DE Dir.) DLAT Destructive Lot Acceptance Testing DLC Direct Lift Control DLS Dynamic Load Simulator DLSC Defense Logistics Service Center DLSM Data Link Summary Message DLTR Data Link Terminal Repeater DLTR Data Link Transmission Repeater DLY Delay DM Data Manager DM Development Motor DM Developmental Instrumentation MDM-Mid DM Disassembly Manual DM Docking Mechanism DM Document, Documentation DMA Direct Memory Access DMA Direct Memory Address DMC Data Management Computer DMC Direct Maintenance Cost DMC Drive Motor Assembly DMCF Deservicing, Maintenance, and Checkout Facility DMD Dextrous Manipulator Demonstration DME Distance Measuring Equipment DMG Data Management Group DMIA Dual Multiplexer Interface Adapter DMIS Data Management Information System DML Developmental Instrumentation MDM-Left DMON Discrete Monitoring DMP Deployable Maintenance Platform DMP DEU Message Processor DMP Dump DMR Developmental Instrumentation MDM-Right DMS Data Management System DMS Docking Mechanism System (Subsystem) DMS Docking Module Subsystem DMS Dynamic Motion Simulator DMSS Data Management System Simulator (CVT) DN Discrepancy Notice DN Down DNA Does Not Apply DNLK Downlink (D/L preferred) DNLT Downlist DNO Descending Node Orbit DNP Dynamic Nuclear Polarization DO Discrete Output DOA Department of Agriculture DOC Department of Commerce DOC Document, Documentation DOD Department of Defense DOD-STP Department of Defense-Standard Satellite DODD Department of Defense Directive DOE Department of Energy DOF Degree-of-Freedom DOF Direction of Flight DOH Discrete Output High DOI Descent Orbit Insertion DOL Department of Labor DOL Discrete Output Low DOMSAT Domestic Satellite DOP Diver Operated Plug DOS Disk Operating System DOSIM Dosimeter DOT Department of Transportation DOT Deployment Operations Team DOT/CIAP DOT Climatic Impact Assessment Program DOY Day of Year DP Data Processing DP Delayed Procurement DP Deployable Payload DP Design Proof DP Development Phase DP Differential Pressure DP Double Pole DP Double Precision DP&S Data Processing and Software DP&SS Data Processing and Software Subsystem DP/DT Delta Pressure/Delta Time DPA Data Processing Assembly DPAF Dual Payload Attachment Fitting DPI Detail Program Interrelationships DPLR Doppler DPM Dual Port Memory DPNL Distribution Panel DPP Deployment Pointing Panels DPR Definition Phase Review DPS Data Processing and Software DPS Data Processing Software System DPS Data Processing System (Subsystern) DPT Design Proof Test DPY Deploy DR Dead Reckoning DR Design Review DR Development-Right DR Discrepancy Report DR Discrete Register DR Dispatch Reliability DR Disposition Record DR Door DR Drive DR&A Data Requirements and Analysis DRA Data Release Authorization DRB Design Requirements Baseline DRB Design Review Board DRC Data Reduction Center DRC Discrete Rate Command DRD Data Requirement Description DRD Data Requirements Document DRD Detailed Requirements Document DRD Document Requirement Description DRF Data Request Form DRF Digital, Radio Frequency DRF Documentation Requisition Form DRG Digital Ranging Generator DRI Data Rate Indicator DRIRU Dry Rotor Inertial Reference Unit DRK Display Request Keyboard DRL Data Requirements List DRL Document Requirements List DRM Data Records Management DRM Design Reference Mission DRM Drawing Requirements Manual DRN Drain DRO Document Release Order DROG Drogue DRR Data Recorder/Reproducer DRR Design Requirements Review DRS Data Relay Satellite DRS Data Relay Station DRS Digital Range Safety DRSS Discrepancy Report Squawk Sheet DRT Design Reference Timeline DRTT Discrepancy Report Tracking Tool DRUC Disposition Record Unsatisfactory Condition DS Data Storage DS&R Data Storage and Retrieval DSA Defense Supply Agency DSAD Data Systems and Analysis Directorate (JSC) DSB Document Status Bulletin DSB Double Side Band DSC Data Separator Card DSC Dedicated Signal Conditioner DSN Deep-Space Network DTO Development Test Objective DTP Detail Test Plan DTPR Detailed Test Procedures DTRD Development Test Requirements Document DTS Data Transmission System DTS Data Transfer System DU Display Unit DUA Digital Uplink Assembly DUC Digital Uplink Command DUM Dummy DUPLX Duplex DUPLXR Duplexer DUR Duration DV Designated Verification DV Designee for Verification DV Differential Velocity DVD Delta Velocity Display DVM Digital Voltmeter DVS Design Verification Specification DVS Digital Voice System DVT Design Verification Testing DVT Development Verification Test DW Data Word DWG Drawing DWI Data Word In DWS Disaster Warning Satellite DWV Dielectric Withstanding Voltage DY Deputy Director (KSC Directorate) DYN Dynamic DXS Diffuse X-Ray Spectrometer E E East E Elevation Angle E Engine E Exempt (From Traceability) E&D Engineering and Development E&D Engineering and Development Directorate (JSC) E&I Electrical and Instrumentation E&OO Engineering and Operations Office E-E End-to-End E-MUX Electrical Multiplex E-P Electron/Proton E/C Encoder/Coupler E/L Entry/Landing E/M Engineering Model E/O Engineering/Operations E/O-IMS E/O-Information Management System E/W Energy to Weight Ratio E/W Energy Over Weight EA Each EA Electronic Assembly EA Elevation Angle EAC Energy Absorbing Capacity EAC Estimate at Completion EAC Experiment Apparatus Container EAD Electrically Alterable Device EADI Electronic Attitude Director Indicator EADS Engineering Analysis and Data System EAFB Edwards Air Force Base EAFB Eglin Air Force Base EAFB Ellington Air Force Base EAM Electrical Accounting Machine EAP Educator Astronaut Program EAP Employee Assistance Program EAR Engineering Analysis Report EAS Equivalent Air Speed EAT Environmental Acceptance Test EB Electronic Beam EB Emergency Box EBC Emulated Buffer Computer EBCDC Extended Binary Coded Decimal EBD Eyeballs Down (+GZ) EBI Eyeballs In (+GX) EBL Eyeballs Left (+GY) EBO Eyeballs Out (-GX) EBR Eyeballs Right (-GY) EBS Emergency Breathing Subsystem EBU Eyeballs Up (-GZ) EBW Electron Beam Welding EBW Exploding Bridge Wire EC Element Contractor EC Engine Control EC Engine Cutoff EC Essentiality Code EC Events Controller EC Events Coupler EC Experiment Computer ECA Electronics Control Assembly ECA Engineering Change Analysis ECA Epoxy Curing Agent ECAS Experiment Computer Application Software ECB Engineering Change Board ECB Event Control Block ECB Events Control Buffer ECC Engineering Change Control ECC Engineering Critical Component ECCB Engineering Change Control Board ECD Engineering Control Drawing ECD Estimated Completion Date ECEP Experiment Checkout Equipment Processor ECF Element Charge Factor ECF Equivalency Capability File ECG Electrocardiogram ECG Electrocardiograph ECI Earth Centered Inertia (inertials) ECIO Experiment Computer Input/Output ECL Entry Closed Loop ECLS Environmental Control and Life Support ECLSS Environmental Control and Life Support System (Subsystem) ECN Engineering Change Notice ECO Engine Combustion ECO Engine Cutoff ECO Engineering Change Order ECOS Experiment Computer Operating System ECP Engineering Change Program ECP Engineering Change Proposal ECP Engineering Control Proposal ECP Explicitly Coded Program ECR Engineering Change Request ECRA Engineering Change Request/Authorization ECS Engine Control System ECS Environmental Control System (Subsystem) ECU Electrical Control Unit ECU Electronic Coupling Unit ECU Environmental Control Unit ECU Experiment Control Unit ED Edge Distance ED Edit ED Engineering Directive ED Explosive Device EDA Electronic Display Assembly EDA Elevation Drive Assembly EDAX Compositional Analysis EDB Environmental Data Book EDC Engineering Design Change EDC(M) Electrochemical Depolarized CO2 (Module) EDCP Engineering Design Change Proposal EDDR Electron Dipole-Dipole Reservoir EDF Engineering Data File EDLN Engineering Development Logic Network EDM Electro-Discharge Machining EDMS Enterprise Document Management System EDNi Electro-Deposit Nickel EDO Extended Duration Orbiter EDP Electonic Data Processing EDP Embedded Data Processor EDPE Electronic Data Processing Equipment EDPM Electronic Data Processing Machine EDR Engineering Design Review EDS Electrical Distribution System EDS Emergency Detection System EDS Explosive Device System EDT Eastern Daylight Time EDU Engineering Development Unit EDV Electronic Depressurizing Valve EDW Edwards (TACAN Station) EDW Edwards Air Force Base, CA (Deorb OPT site) EE End Effector EEC Extendible Exit Cone EECOM Electrical, Environmental, and Communications EECOM Electrical, Environmental, Consumables, and Mechanical Systems (MPSR) EED Electro (Electrical) Explosive Device EED Electroexplosive device EEE Electronic, Electrical, Electromechanical EEEU End Effector Electronics Unit EEG Electroencephalogram EEH EMU Electrical Harness EEIS End-to-End Information System EEL Electrical Equipment List EEM Earth Entry Module EENT Eye, Ear, Nose, and Throat EES Ejection Escape Suit EES Emergency Ejection Suits EES Escape Ejection Suit EET Entry Elapsed Time EETB Electronic Electrical Termination Building EEVT Electrophoresis Equipment Verification Test EFA Experiment Flight Applications EFCS Earth Fixed Coordinate System EFF Efficiency EFFGRO Efficient Growth (Computer Program) EFP ESA Furnished Property EFTO Encrypted for Transmission Only EG Entry Guidance EGA Evolved Gas Analysis EGC Experiments Ground Computer EGF Electrical, Grapple Fixture EGIL Electrical, General Instrumentation, and Lighting Engineer EGRET Energetic Gamma Ray Explorer Telescope EGRS Egress EGSE Electrical Ground Support Equipment EGT Elapsed Ground Time EGT Estimated Ground Time EGT Exhaust Gas Temperature EGUN Fast Pulse Electron Gun EH/M Extension Hose/Mouthpiece EHC Electrical Heating Control EHF Extremely High Frequency EHOT External Hydrogen/Oxygen Tank EHP Effective Horsepower EHP Electrical Horsepower EHR Earned Hour Ratio EHS Enhanced HOSC System EHS Environmental Health Services EHX Experiment Dedicated Heat Exchanger EI Electromagnetic Interference EI Electronic Interface EI End Item EI Engineering Instruction EI Entry Interface EI Environmental Impact EIA Electrical Industries Association EIASN End Item Assembly Sequence Number EIC Experimental Intercom EID End Item Documentation EIDP End Item Data Package EIFA Element Interface Functional Analysis EIR Environmental Impact Report EIRP Effective Isotropic Radiated Power EIS Electrical Integration System EIS End Item Specification EIS Environmental Impact Statement EIS Extended Instruction Set EIT Entry Interface Time EIU Engine Interface Unit EIVT Electrical and Instrumentation Verification Test EIVT Electrical Interface Verification Test EIVT Electronic Installation Verification Test EJN Ejection EKG Electrocardiogram (Record) EKG Electrocardiograph (Instrument) EL Elastic Limit EL Electroluminescent EL Elevate EL Elevation Angle EL Equipment List EL MECH Electromechanical ELACS Extended Life Attitude Control System ELB Elbow ELDISC Electrical Disconnect ELDV Electrically Operated Depressurization Valve ELEC Electronic ELEC Electric ELECT Electrical ELECTR Electronics ELEV Elevon ELF Extremely Low Frequency (1 Hz to 3 kHz) ELINT Electromagnetic Intelligence ELMCH Electromechanical ELMS Elements ELMS Elastic Loop Mobility System ELS Earth Landing System (Subsystem) ELS Eastern Launch Site ELS Elevon Load System ELS Emergency Landing Site ELS Energy Loss Spectroscopy ELSC Earth Landing Sequence Controller ELSS Emergency Life Support System ELT Emergency Locator Transmitter ELV Earth Launch Vehicle ELV Electrically Operated Valve ELV Expendable Launch Vehicle ELVIS Expendable Launch Vehicle Integrated Support ELVN Eleven EM Electromagnetic EM Emergency EM Engineering Model EM Exception Monitor EMA Electromagnetic Analysis EMC Electromagnetic Compatibility EMCC Emergency Mission Control Center EMCD Electro-Mechanical Control Diagram EMCI Engineering Model Configuration Inspection EMD Entry Monitor Display EMEC Electromagnetic Effects Capability EMEC Electromagnetic Effects Compatibility EMER Emergency EMES Electriral, Mechanical, and Environmental Systems EMF Electromagnetic Force EMF Electromotive Force EMG Electromyograph(gram) EMG Surface Electromyograms EMI Electromagnetic Interference EMIS Emission EMK Emergency Medical Kit EMK Emergency medical kit EML Electromagnetic Laboratory EMN Engineering Management Network EMON Exception Monitoring EMP Electromagnetic Pulse EMP Equipment Mounting Plate EMPGS Electrical/Mechanical Power Generation Subsystem EMR Engine Mixture Ratio EMRL Equipment Maintenance Requirements List EMS Electromagnetic Susceptibility EMS Engineering Master Schedule EMS Engineering Modeling System EMS Entry Monitor Subsystem EMS Entry Monitoring System EMSF External Maintenance and Servicing Facility EMSS Electromagnetic Servoactuator System EMT Electromechanical Test EMU Engineering Model Unit EMU Extended Memory Unit EMU Extravehicular Mobility Unit EMU-TV Extravehicular Mobility Unit - Television E-MUX Electrical Multiplex ENA Enable ENC Encode ENCD Encode ENCL Enclose END EFF End Effector ENDF Evaluated Neutron Data File ENG Engine, Engineer ENG Electronystagnogram ENGR Engineer ENGRG Engineering ENIAC Electronic Numerical Integrator and Computer ENT Entry ENVIR Environment, Environmental EO Earth Observation EO Earth Orbit EO Engineering Order EO Engine Out EO Equal Opportunity Program Office (KSC Directorate) EOC End of Contract EOC Engine Order Capability EOC Engine-out Capability EOD Entry on Duty EOC EOS Operations Center EOD Environmental Observation Division EOD Estimated on Dock EOD Explosive Ordnance Disposal EODB End of Data Block EOF End of File EOG Electroculogram EOHT External Oxygen and Hydrogen Tanks EOI Earth Orbit Insertion EOL End of Line EOM Earth Observation Mission EOM End of Message EOM End of Mission EOM End of Month EOM Engineering Operations Manual EOM Equations of Motion EOMF End of Minor Frame EOO Equal Opportunity Office EOP Earth and Ocean Physics EOP Emergency Oxygen Pack EOP Experiments of Opportunity EOPAP Earth and Ocean Physics Application Program EOPO Equal Opportunity Program Office EOR Earth Orbit Rendezvous EOS Earth Observation Satellite EOS Earth Observing System EOS Earth Orbit Shuttle EOS Emergency Oxygen Supply EOS Emergency Oxygen System EOS Extended Operating System EOSDIS EOS Data and Information System EOT End of Tape EOT End of Transmission EOW Energy over Weight EP Elbow Pitch EP Electrical Power EP Environmental Protective Plan EP Equivalent Person EPA Environmental Protection Agency EPAR External Tank Project Assessment Review EPC Error Protection Code EPC External Power Contractor EPCDC Electrical Power Conditioning, Distribution, and Control EPD Electrical Power Distribution EPD Emergency Procedures Document EPDB Electrical Power Data Box EPDB Electrical Power Distribution Box EPDB Experiment Power Distribution Box EPDC Electrical Power Distribution and Control EPDCS Electrical Power Distribution and Control System (Subsystem) EPDM Ethylene Propylene Diene Monomer EPDS Electrical Power and Distribution Subsystem EPDS Electrical Power Distribution Subsystem EPDS Electrical Power Distribution System EPDS Experiment Power and Data System EPDU Electrical Power Distribution Unit EPE Energetic Particle Explorer EPG Electrical Power Generator EPL Electrical Power Level EPL Electronic, Electrical, and Electromechanical Parts List EPL Emergency Power Level EPMS Engineering Performance Management System EPO Element Project Office EPOC External Payload Operations Center EPPS Electrical Power/Pyro Sequential System EPR Engine Pressure Ratio EPRN Emergency Program Release Notice EPROM Erasable Programmable Read Only Memory EPS Electrical Power System (Subsystem) EPS Evaluation Planning System EPS Experimental Power Supply EPSP Experiment Power Switching Panel EPT Emergency Procedure Trainer EPT Ethylene Propylene Terpolymer EPTU Events per Time Unit EPWG Environmental Projects Working Group EQ Equivalent EQE Event Queue Element EQL Equal EQUIP Equipment EQUIV Equivalent ER Explanation Report ERA Electrical Replaceable Assembly ERA Exabiology and Radiation Assembly ERAP Earth Resources Aircraft Program ERB Engineering Review Board ERBE Earth Radiation Budget Experiment ERBE-NS ERBE Nonscanner ERBE-S ERBE Scanner ERBS Earth Radiation Budget Satellite ERC Event Recorder ERCA Electrochemically Regenerable CO2 Absorber ERD Experiment Requirements Document EREP Earth Resources Package ERG Ergometer ERIP Experiment Requirement and Implementation Plan ERL Environmental Research Laboratory ERNO 'Entwicklungts Ring Nord' Organization, Space Division of European Consortium, VFW-Fokker-Mannheim, Germany (Spacelab Contractor) ERO Engineering Release Operations EROS Earth Resources Observation System ERP Effected Radiative Power ERP Effective Radiation Power ERP Eye Reference Point ERPM Engineering Requirements and Procedures Manual ERR Error ERR CNTR Error Counter ERRC Expendability/Recoverability/Repair Capability ERS Earth Recovery Subsystem ERS Element Rotation Stand ERS Engineering Release System ERS Entry and Recovery Simulation ERS-1 Earth Remote Sensing Satellite-1 ERSI Elastomeric Reusable Surface Insulation ERSIR Earth Resources Shuttle Imaging Radar ERTS Earth Resources Technology Satellite ERU Earth Rate Unit ERV Expiratory Reserve Volume ES Electrical System ES Equipment Section ES Equipment Shelf ES Escape System ES Experiment Segment ESA Engineering Supply Area ESA Engineering Support Assembly ESA European Space Agency ESA Explosive Safe Area ESB Essential Switching Box ESC Engine Start Command ESC Engineering Support Center ESC Escape ESCA Electron Spectroscopy for Chemical Analysis ESCU Extended Service and Cooling Umbilical ESD Electrostatic Discharge ESD Emergency Shutdown ESD Experiment Systems Division ESDAC European Space Data Center (Darmstadt, Germany) ESDIS Earth Science Data and Information System ESDU Event Storage and Distribution Unit ESE Electrical Support Equipment ESE Electronic Support Equipment ESE EVA Support Equipment ESF Explosive Safe Facility ESI Electrical System Integration ESMC Eastern Space and Missile Center (formerly AFETR), also ETR ESMOS Earth Science Mission Operations and Systems ESO Event Sequence Override ESOC European Space Operations Center ESOW Engineering Statement of Work ESP Electroshock Protection ESP Engine Service Platforms ESP Experiment Sensing Platform ESP External Stowage Platform ESPS Experiment Segment Pallet Simulator ESR Effective Sunrise ESR Engineering Support Request ESRIN European Space Research Institute ESRO European Space Research Organization ESS Effective Sunset ESS Environmental Support System ESS Equipment Support Section ESS Essential ESS Experiment Subsystem Simulator ESSA Environmental Sciences Services Administration EST Eastern Standard Time EST Estimate(d) ESTA Electronic System Test Equipment ESTA Escape System Test Article ESTEC European Space Research and Technology Center ESTEC European Space Technology Center ESTL Electronic Systems Test Laboratory ESV Emergency Shutoff Valve ESVS Escape Suit Ventilation System ESVS Escape System Ventilation System ESW Engine Status Word ET Edge Thickness ET Elapsed Time ET Elevated Temperature ET Event Timer ET External Tank ET-SEP External Tank Separation ETA Environmental Test Article ETA Estimated Time of Arrival ETA Estimated Time to Acquisition ETA Explosive Transfer Assembly ETA External Tank Attachment ETB Equipment Transfer Bag ETC Earth Terrain Camera ETC Estimate to Completion ETC Greenbelt, Maryland (STDN Site) ETCO Equipment Transfer/Change Order ETD Electrical Terminal Distributor ETD Estimated Turnover Date ETD External Tank Door ETE End-to-End ETI Elapsed Time Indicator ETLOW External Tank Lift-Off Weight ETM Elapsed Time Meter ETP Equipment Test Plan ETR Eastern Test Range (ESME preferred) ETROD Eastern Test Range Operations Directive ETS Electrical Test Set ETS Energy Transfer System ETS External Tank System (Subsystem) ETSS External Tank Separation Subsystem ETVA External Tank Vent Arm EU Electronic Unit EU Engineering Units EU Experimental Unit EUROCOMSATE European Consortium Communications Satellite EUV Extreme Ultraviolet EUVE Extreme Ultraviolet Explorer EV Electron Volts EV Expendable Vehicles EV Extravehicular EVA Earned Value Analysis EVA Earned Value Assessment EVA Extravehicular Activity EVAL Earth Viewing Applications Laboratory EVAL Evaluate, Evaluation EVAP Evaporator EVATA Extravehicular Activity Translational Aid EVC Extravehicular Communications EVCON Events Control (Subsystem) EVCS Extravehicular Communications System EVCU Extravehicular Communications Umbilical EVD External Visual Display EVF Equipment Visibility File EVLSS Extravehicular Life Support System EVM Earth Viewing Module EVMS Earned Value Management System EVMU Extra Vehicular Mobility Unit EVO Engineering Verification Order EVS Equipment Visibility System EVS Extravehicular Suit EVSC Extravehicular Suit Communications EVSS Extravehicular Space Suit EVSU Extravehicular Space Unit EVT Engineering Verification Test EVT Extravehicular Transfer EVVA Extravehicular Visor Assembly EWA Estimated Warehouse Arrival EWE Emergency Window Escape EWO Engineering Work Order EWR Engineering Work Request EX Executive Management Office (KSC Directorate) EXC Experiment Computer EXCH Exchange EXEC Execute EXH Exhaust EXO Experiment Operator (in Spacelab) EXP Expand EXP Experiment EXP Exposure EXPEN Expendable EXT Experiment Terminal (Operator Console on Spacelab) EXT Extension EXT External EXTD Extend EXTER External EXTGH Extinguish F F Fahrenheit F Failure F Farad (SI Unit of Capacitance) F Female F Forward F Front F&E Facility and Environment F&S Fire and Smoke Detection F/A Failure Analysis F/A Fuel-Air F/C Fit Check F/C Flight Controller F/C Fuel Cells F/D Fill/Drain F/E Full/Empty F/F Fill/Full, Full/Fill F/O Fuel/Oxidizer Ratio F/R Flared Rudder FA Failure Analysis FA Final Approach FA Final Assembly FA Flight Aft FA Flight Critical Aft FA Fully Automatic FA/COSI Final Assembly and Closeout System Installation FAA False Alarm Avoidance FAA Federal Aviation Administration FAB Fabricate, Fabrication FAC Facility FACI First Article Configuration Inspection FACO Fabrication and Acceptance Checkout FACO Factory Acceptance Checkout FACO Factory Assembly and Checkout FACO Final Assembly Checkout FACS Facilities Control FACS Finance and Control System FACT Flexible Automatic Circuit Tester FAD Final Approach Display FAF First Aerodynamic Flight FAGS Federation for Astronomical and Geophysical Services FAIR Fabrication, Assembly, and Inspection Record FAJ Final Assembly Jig FAL First Approach and Landing (Test) FAM Familiarization FAMOS Flight Acceleration Monitor Only System FAO Flight Activities Officer FAP Final Approach Plane FAR Failure Analysis Report FAR Federal Aviation Regulation FAR Final Acceptance Review FAR Flight Acceptance Review FAR-UV Far Ultraviolet Camera FARC Federal Archives and Records Center FASCOS Flight Acceleration Safety Cutoff System FAT Flight Attitude Table FAUST Far Ultraviolet Space Telescope FAWG Flight Assignment Working Group FAX Facsimile Transmission FB Feedback FB Final Braking FBAS Fixed Base Aft Station FBC Fluidized-Bed Combustion FBCS Fixed Base Crew Station (SMS) FBS File Backup System FBS Firefighters Breathing System FBS Flare Buildup Study FBV Field Base Visit FBV Fuel Bleed Valve FC Fit Check FC Flight Computer FC Flight Control FC Flight Critical FC Fuel Cell FC Furnace Container FCA Fluids Control Assembly FCA Frequency Control Analysis FCA Functional Compatibility Analysis FCA Functional Configuration Audit FCAF Flight Crew Accommodations Facility FCAP Flight Control Applications Program FCC Federal Communications Commission FCC Flat Conductor Cable FCC Flight Control Computer FCC Flight Crew Compartment FCCP Firm Contract Cost Proposal FCD Flight Control Division (JSC) FCDB Flight Control Data Bus FCE Flight Control Equipment FCE Flight Crew Equipment FCEF Flight Crew Equipment Facility FCEI Facility Contractor End Item FCF First Captive Flight FCF Flight Critical Forward FCF Functional Check Flight FCFM Flight Combustion Facility Monitor FCH Flight Controllers Handbook FCHL Flight Control Hydraulics Laboratory FCI Flight Control Indicator FCI Functional Configuration Identification FCIM Flight Control Interface Module FCIP Flight Cargo Implementation Plan FCIT First Computer Interface Tester FCL Freon Coolant Line FCL Freon Coolant Loop FCMU Foot Controlled Maneuvering Unit FCN Function FCO Final Checkout FCO Functional Checkout FCOH Flight Controllers Operational Handbook FCOS Flight Computer Operating System (Orbiter) FCOS Flight Control Operating System FCOS Flight Control Operational Software FCP Failure Correction Panel FCP Firm Cost Proposal FCP Flight Correction Proposal FCP Fuel Cell Power (Plant) FCPS Fuel Cell Power System (Subsystem) FCR Final Configuration Review FCR Flight Configuration Review FCR Flight Control Room FCRA Fecal Collection Receptacle Assembly FCRT Flight Display CRT FCS Fecal Containment System FCS Federal Communications System FCS Financial Control System FCS Flight Control System (Subsystem) FCS Flight Crew System FCSM Flight Combustion Stability Monitor FCSS Fuel Cell Servicing System FCT Flight Control Team FCT Flight Crew Trainer FCT Fuel Cell Test FCTB Flight Crew Training Building FCTF Fuel Cell Test Facility FCTS Flight Crew Trainer Simulator FCU Fluid Checkout Unit FCW Format Control Words FD Fault Detection FD Feed FD Flight Day FD Flight Deck FD Flight Director FD Freeze Dried FD Function Designator FD WMR Food Warmer FDA Fault Detection and Annunciation FDA Flight Deck Assembly (FDF) FDAI Flight Director Attitude Indicator FDB Fahrenheit Dry Bulb FDD Flight Definition Document FDDB Function Designator Data Base FDE Fluid Dynamics Experiment FDF Flight Data File FDF Flight Dynamics Facility FDI Failure Detector Indicator FDI Fault Detection and Identification FDI Fault Detection and Isolation FDIIR Fault Detection, Isolation, Identification, and Recompensation FDIR Fault Detection Identification/Isolation and Recovery/Recognition FDL Flight Director Loop FDLN Feedline FDM Flight Data Manager FDM Frequency Data Multiplexer FDM Frequency Division Multiplexing FDMA Full Diameter Motorized Door Assembly FDO Fee Determination Official FDO Flight Dynamics Officer FDOR Flight Design Operations Review FDR Final Design Review FDR Flight Data Recorder FDR Functional Design Review FDRD Flight Definition and Requirements Document FDRI Flight Director Rate Indicator FDS Fire Detection and Suppression FDS Flight Design and Scheduling FDS Flight Design System FDS Flight Dynamics Simulator FDS Flight Dynamics Software/System FDS Fluid Distribution System FDS Functional Design Specifications FDSC Flight Dynamics Simulation Complex FDSC Flight Dynamics Situation Complex FDU Fluid Distribution Unit FDX Full Duplex FEA Failure Effects Analysis FEA Fluids Experiment Apparatus FEAT Final Engineering Acceptance Test FEB Forward Equipment Bay FEC Field Engineering Change FEC Forward Events Controller FED Flight Events Demonstration FEDP Facility and Equipment Design Plan FEGLI Federal Employees Group Life Insurance FEID Flight Equipment Interface Device FEID Functional Engineering Interface Device FEM Finite Element Method FEMCPL Facilities and Envir. Measurement Comp. Parts List FEP Flight Evaluation Plan FEP Fluoro Ethel Propane FEP Fluorinated Ethylene Propylene FEP Front End Processor FERD Facility and Equipment Requirements Document FERS Federal Employees Retirement System FES Flash Evaporator System FES Flight Element Set FES Fluid Experiment System FES/VCGS Fluid Experiment System/Vapor Crystal Growth System FESL Failure Effects Summary List FET Field Effect Transistor FET Flight Elapsed Time FEU Flight Equivalent Unit FEW Federally Employed Women FEWG Flight Evaluation Working Group FF Flight Forward FF Flip Flop FF Free Flight FFBD Functional Flow Block Diagram FFC Final Flight Certification FFD Fixed Format Display FFD Functional Flow Diagram FFM Free-Flying (Experiment) Module FFP Firmed Fixed Price FFTO Free-Flying Teleoperator FGE Fine Guidance Electronics FGS Fine Guidance Sensors FGS Fine Guidance System FGSE Fine Guidance System Electronics FH Flex Hose FHC Flight Half Coupling FHD Fixed Head Disk FHF First Horizontal Flight FHO Failed Handover FHP Fuel High Pressure FHS Forward Heat Shield FHST Fixed-Head Star Tracker FI Fault Identification FI Flight Instrumentation FI Formal Inspection FIAR Failure Investigation Action Report FID Failure Identification FID Flight Implementation Directive FIDO Flight Dynamics Officer FIE Flight Instrumentation Engineer FIFO First In-First Out (High Speed Data Buffers) FIG Figure FIIG Federal Item Identification Guide FIL Filament FILE Future Identification and Location Experiment FIO Furnished and Installed by Others FIPS Federal Information Processing Standards FIR Fuel Indicating Reading FIRST Far-Infrared Space Telescope FIS Facility Interface Sheets FIT Fault Isolation Test FIT First Computer Interface Tester FITH Fire-in-the-Hole FIV Fuel Isolation Valve FKB Flight Display Keyboard FKF Flight Kits Facility FL Fail FL Feed Lines FL Flowline FL Forward Link FL MECH Fluid Mechanical FLAP Flight Application Software FLC Federal Library Committee FLC Forward Load Control FLCA Forward Load Control Assembly FLD Field FLEX Flexible FLG Flag FLG Flange FLLK Frustum Lifting Lug Kit FLMC Florida Labor Management Conference FLN Fuel Line FLOT Flotation FLP Flap FLPS Flight Load Preparation System FLR Flare FLR Failure FLS Flight Surgeon FLSC Flexible Linear Shaped Charge FLT Flight FLT Floating FLTR Filter FLTSATCOM Fleet Satellite Communications FLUOR Fluorescent FLW Fellows (TACAN Station) FM Failure Mechanics FM Flight Model FM Frequency Modulation (Modulated) FM Furnace Module FM/FM Frequency Modulation/Frequency Multiplexing FM/PM Frequency Modulation/Phase Modulation FMA Failure Mode Analysis FMAHTS Flight Manifest and Hardware Tracking System FMANTS Flight Manifest FMC Food Machinery Corporation FMCF First Manned Captive Flight FMCS Federal Mediation and Conciliation Service FMDM Flex Multiplexer/Demultiplexer FMEA Failure Modes and Effects Analysis FMEC Forward Master Events Controller FMECA Failure Mode, Effects, and Criticality Analysis FML Fault Message Line FML Final Materials List FMO Flight Medical Officer FMOF First Manned Orbital Flight FMOFEV First Manned Orbital Flight with EVA FMOFPL First Manned Orbital Flight with Payload FMR Field Modification Request FMR Function Max Rate FMS Food Management System (Subsystem) FMSP Frequency Modulation Signal Processor FMSP FM signal processor FMT Flight Management Team FMX FM Transmitter FND Facility Need Date FNL Final FNT Failure Notification Telex FO Fail Operational FO Fiber Optics FO Functional Objective FO/FS Fail-Operational/Fail-Safe FOB Flight Operations Building FOB Free on Board FOC Focus FOC Full Operational Capability FOD Flight Operations Directorate (JSC) FOE Flight Operations Engineer FOF First Operational Flight FOF First Orbital Flight FOF Flight Operations Facilities FOIA Freedom of Information Act FOIH Flight Operations Integration Handbook FOMR Flight Operations Management Room FOP Flight Operations Panel FOP Flight Operations Plan FOP Follow on Production FOPG Flight Operations Planning Group FOPP Follow on Parts Production FOPS Flight Operations Planning Schedule FOR Flight Operations Review FOR Force FORTRAN Formula Translation FOS Faint Object Spectrograph (on HST) FOS Flight Operations Support FOSDIC Film Optical Sensing Device for Input to Computers FOSO Flight Operations Scheduling Officer FOSP Flight Operations Support Personnel FOST Flight Operations Support Team FOT Flight Operations Team FOV Field of View (Vision) FOV First Orbital Vehicle FP Fine Pointing FP Fixed Point FP Flight Plan FP Freezing Point FP Fuel Pressure FP Function Path FPB Fuel Preburner FPBOV Fuel Preburner and Oxidizer Valve FPC Fluids Pressure Control FPC Forward Power Controller FPCA Forward Power Control Assembly FPE Functional Program Element FPEG Fast Pulse Electron Gun FPHB Flight Procedures Handbook FPIF Fixed Price Incentive Fee FPL Florida Power & Light Company FPL Full Power Level FPL Full Power Load FPM Folding Platform Mechanism FPM Feet per Minute FPOV Fuel Preburner Oxidizer Valve FPP Freon Pump Package FPPR Fixed Price with Price Revision FPR Flight Performance Reserve FPS Feet Per Second FPS Flight Per Second FPS Floating Point System FPS Focal Plane Structure FPS Forward Power Supply FPS Frames Per Second FPS2 Feet Per Second Squared FPU Floating Point Unit FPV Flow Proportioning Valve FQ Flight Qualification FQI Flight Qualification Instrumentation FQR Flight Qualification Review FQR Flight Qualification Recorder FQT Formal Qualification Test FR Firing Room FR Flight Rule FR Frame FRAGNET Fragmented Network FRAM Flight Release Attach Mechanism FRB Failure Review Board FRC Flight Research Center, California FRCI Fibrous Refractory Composite Insulation FRCS Forward Reaction Control System (Subsystem) FRD Flight Requirements Document FRE Flight Related Element FRE Format Request Element FREQ Frequency FREQ CONV Frequency Converter FREQ DIV Frequency Divider FRF Flight Readiness Firing FRFT Flight Readiness Firing Test FRJD Forward Reaction Jet Driver FRL Fuselage Reference Line FRL Frame Reference Line FRM Fleet Resource Management FRMT Format FRP Fuselage Reference Plane FRR Flight Readiness Review FRRID Flight Readiness Review Item Description FRRID Flight Readiness Review Item Disposition FRSI Felt Reusable Surface Insulation FRSI Flexible reusable surface insulation FRT Frequency ResponseTest FRT Flight Readiness Test FRT Flight Readiness Training FRZR Freezer FS Fail-Safe FS Fail to Sync FS Fault Summary FS Federal Specification FS Fire Suppression FS Flight System FS Freon Servicer FS Full Scale FS Functional Schematic FS Fuselage Station FSAA Flight Simulator for Advanced Aircraft FSC Federal Stock Classification FSCM Federal Supply Code for Manufacturers FSCP Fire Sensor Control Panel FSD Flight Simulation Division (JSC) FSD Full Scale Development FSE Flight Simulation Engineer FSF First Static Firing FSGS Flare/Shallow Glide Slope FSI Final Systems Installation FSIM Functional Simulator FSIWG Flight System Interface Working Group FSK Frequency Shift Keyed (Keying) FSL Flight Simulation Laboratory FSL Flight Systems Laboratory FSLO First Spacelab Payload FSLT First Sea Level Test FSM Fuel Supply Module FSN Federal Stock Number FSO Functional Supplementary Objective FSOH Flight Support Operations Handbook FSOP Florida Safety Operating Plan FSP Fault Summary Page FSR Final System Release FSR Flight Specific Requirements FSRR Flight System Readiness Review FSRR Flight Software Readiness Review FSRS Flight System Recording System FSS Field Spectrometer System FSS Fire Suppression System FSS Fixed Service Structure FSS Flight Support Station (for MMU) FSS Flight Support Structure FSS Flight Support System FSS Flight Systems Simulator FSSR Functional Subsystem Software Requirements FSSR Flight Systems Software Requirements FSTE Factory Special Test Equipment FSU Freon Servicing Unit FSW Flight Software FT Feet FT Flight Team FT Flight Test FT Formal Training FT Functional Test FT/SEC Feet per Second FT&C Formal Training and Certification FTA Fatigue Test Article FTA Fault Tree Analysis FTA Flight Test Article FTC Flight Test Conductor FTC Florida Test Center (MDAC) FTE Factory Test Equipment FTE Flight Test Engineer FTE Forced Test End FTE Full Time Equivalent FTIS Flight Test Instrumentation System FTO Flight Test Objective FTO Functional Test Objective FTOH Flight Team Operations Handbook FTOH Flight Test Operations Handbook FTP Flight Test Procedure FTP Full Throttle Position FTP Function Test Progress FTP Functional Test Program FTR Flight Test Requirement FTR Functional Test Requirement FTRD Flight Test Requirements Document FTRD Functional Test Requirements Document FTS Federal Telecommunications System FTS Flight Test Station FTS Flight Test System FTS Functional Test Specifications FU Flight Unit FU Fuel FUB Forward Utility Bridge FUD First Use Date FUNC Function FUNCT Functional FUO Follow-up Output FUS Fuselage FUS/LF Fuselage, Lower Forward FUS/UF Fuselage, Upper Forward FUSLG Fuselage FV Flight Version FV Front View FVF First Vertical Flight FVMS Fluid Volume Measurement System FVV Facility Verification Vehicle FW Flag Word FW Fuel Wasting FWB Fahrenheit Wet Bulb FWC Filament Wound Case FWD Forward FWD HT SHLD Forward Heat Shield FWG Facility Working Group FWHM Full Width at Half Maximum FWSI Fairchild-Weston Systems, Inc. FWW Food, Water, and Waste FWWM Food, Water, and Waste Management FWWMS Food, Water, and Waste Management System (Subsystem) FXD Fixed FY Fiscal Year G 2GRLV 2nd Generation Return to Launch Vehicle G Giga (Billion) G Gravity G Gravitational Constant G Units of Gravitational Force g gram G&A General and Administrative G&C Guidance and Control G&N Guidance and Navigation G&NS Guidance and Navigation Subsystem G-A Ground-to-Air G-G Ground-to-Ground G-II Gulfstream II (Shuttle Training Aircraft) G-GPRF Gradient General Purpose Rocket Furnace G-MEM General Memory G-MEM GPC-Memory G-V Gravity-Velocity G/A Ground-to-Air G/E Graphite Epoxy G/G Ground-to-Ground G/S Guided steering G/T Antenna Gain-to-Noise Temperature Ratio G/T Gradient-to-Cooling Ratio GA Gage GA General Assembly GA Glide Angle GA Gyro Assembly GA&CS Ground Acquisition and Command Station GAC Ground Attitude Control GAC Grumman Aerospace Corporation GACU Ground Air Conditioning Unit GACU Ground Avionics Cooling Unit GAIN Graphic Aids for Investigating Networks GAM Gamma GAO Government Accountability Office (formerly General Accounting Office until July 2004) GAP GOAL Automatic Procedure GAPL Group Assembly Parts List GAS Get-Away Special GASPI Guidance Attitude Space Position Indicator GATP Ground Acceptance/Article Test Procedure GATT Gate Assisted Turnoff Thyristor GBI Grand Bahama Island GBL Government Bill of Lading GBR Glass Bead Rating GBS Ground Based Software GC Gigacycles (1000 Megacycles) GC Ground Control GC Guidance Control GC Gyrocompassing GCA Ground Controlled Approach GCC Ground Communications Coordinator GCC Ground Control Center GCCC Ground Control Computer Center GCCO Ground Control Checkout GCD Gyro-Compass, Desired Cluster Orientation GCDC Ground Checkout Display and Control GCDCS Ground Checkout Display and Control System GCE Ground Checkout Equipment GCF Ground Communications Facility GCHX Ground Cooling Heat Exchanger GCI Ground Controlled Interception GCIL Ground Command Interface Logic GCIL Ground Control Interface Logic GCILC Ground Command Interface Logic Controller GCILU Ground Control Interface Logic Unit GCL Ground Control Landing GCL Ground Coolant Loop GCN Ground Communications Network (A/G Worldwide Net) GCN Ground Control Network GCO Ground Checkout GCOS General Computer Operational System GCOS Ground Computer Operating System GCR Galactic Cosmic Ray GCR Ground Controlled Radar GCS Ground Communications System GCS Guidance Cutoff Signal GCTS Gas Component Test Stand GCTS Ground Communication(s) Tracking System GCV Gaseous Oxygen Control Valve GCU General Control Unit GCU Generator Control Unit GCU Ground Cooling Unit GCU Gyro Coupling Unit GD Guard GDA Gimbal Drive Actuator/Assembly GDBS Generalized Data Base System GDC General Dynamics Convair GDC Gyro Display Coupler GDP Generalized Documentation Processor GDS GNC Dynamic Simulator GDS Goldstone, California (STDN) GDSD Ground Data Systems Division GDSM Ground Data Systems Manager GDSO Ground Data Systems Officer GDSSR GDSD Staff Support Room GDX Goldstone, CA (STDN Site, 2nd Antenna) GE General Electric GECALL GCOS Program Element Name GEDAC General Electric Detection and Automatic Correction GEN Generate, Generator GENOPAUSE Geodetic Satellite in Polar Geosynchronous Orbit GEOD Geodetic GEOSEPS General Summary Edit Program GEOSEPS Geosynchronous Solar Electric Propulsion Stage GERT Graphical Evaluation and Review Technique GES Goddard Experiment Support System GESYOT GCOS Program Element Name GET Ground Elapsed Time GETI Ground Elapsed Time of Ignition GETIL Ground Elapsed Time of Landing (for TIG of Abort Burn) GETS Ground Equipment Test Sets GF Gage Factor GF&P Gases, Fluids, and Propellants GFAE Government Furnished Aerospace Equipment GFAE Government Furnished Aircraft Equipment GFD Government Furnished Data GFE Government Furnished Equipment GFFC Geophysical Fluid Flow Cell Experiment GFGAS Gradient Furnace for Get Away Special Canister GFM Government Furnished Material GFP Government Furnished Property GFRP Glass Fiber Reinforced Plastics GFRP Graphite Fiber Reinforced Plastics GFS Government Furnished Software GFY Government Fiscal Year GG Gas Generator GG Gravity Gradient GH2 Gaseous Hydrogen GHA Greenwich Hour Angle GHA General Housekeeping Area GHC Ground Half Coupling GHX Ground Heat Exchanger GHe Gaseous Helium GHz Gigahertz GIA GPC Interface Adapter GIDEP Government-Industry Data Exchange Program GIE Ground Instrumentation Equipment GIM Generalized Information Management GIRD Ground Integration Requirements Document GIS Geographic Information System GITG Ground Interface Technical Group GIWG Ground Interface Working Group GLA General Luminary Assembly GLAADS Gun Low Altitude Air Defense System GLAST Gamma-ray Large Area Space Telescope GLC Generator Line Contractor GLD Glide Slope GLL Galileo GLOW Gross Lift-Off Weight GLOW Ground Lift-Off Weight GLP Goal Language Processor GLRSHLD Glare Shield GLS Ground Launch Sequence (Sequencer) GLY Glycol GLY Water-Glycol Mixture GM Gaseous Mixture GM Geometric Mean GMAL General Electric Macro Assembly Language GMBL Gimbal GMCL Ground Measurements Command List GMIL Spaceflight Tracking and Data Network (STDN) GML General Measurement Loop GMML Ground Master Measurements List GMN Gorman (TACAN Station) GMT Greenwich Mean Time GN Gain GN Ground Network GN2 Gaseous Nitrogen GN&C Guidance, Navigation and Control GNC Guidance and Navigation Computer GNCFTS GN&C Flight Test Station GNCIS GN&C Integration Simulator GNCS Guidance and Navigation Control System GNCTS GN&C Test Station GND Ground GND C/O Ground Checkout GNP Gross National Product GO General Order GO2 Gaseous Oxygen GOAL Ground Operations Aerospace Language GOC Ground Operations Coordinator GOCA Ground Operations Control Area GOE Ground Operating Equipment GOES Geostationary Environmental Satellite System GOES Geostationary Operational Environment Satellite GOES Geosynchronous Operational Environmental Satellite GOM KSC Ground Operations Manager at DFRC or WSMR GOMMS Ground Operations and Material Management System GOMS Ground Operations Management System GOP Ground Operations Panel GOPG Ground Operations Planning Group GOR Ground Operations Review GORP Ground Operations Requirements Plan GORP Ground Operations Review Panel GORS Ground Observer RF System GOSS Ground Operations Support System GOWG Ground Operations Working Group GOX Gaseous Oxygen (GO2) GP General Purpose GP General Publication (RSC) GP Group GP-B Gravity Probe B GPA General Purpose Amplifier GPAS General PurPose Airborne Simulator GPBIM General Purpose Buffer Interface Module GPC Gel Permeation Chromatograph GPC General Purpose Computer GPCB GOAL Program Control Block GPD Gimbal Position Display GPES Goal Performance Evaluation System GPH Gallons per Hour GPI Gimbal Position Indicator GPI Ground Position Indicator GPL General Purpose Laboratory GPL Goal Processing Language GPM Gallons per Minute GPME General Purpose Mission Equipment GPRN GOAL Test Procedure Release Notice GPS Gallons per Second GPS General Processing Subsystem GPS Global Positioning Satellite GPS Global Positioning System GPS Ground Power Supply GPS Ground Processing Simulation GPSS General Purpose System Simulator GPTE General Purpose Test Equipment GPU Ground Power Unit GPUR GOAL Test Procedure Update Request GR Ground Rule GRC Glenn Research Center GRE Gamma Ray Explorer GRID Graphic Retrieval and Information Display GRN Green GRO Gamma Ray Observatory GRTLS Glide Return to Launch Site GRTLS Glide Return to Landing Site GS Gas Servicer GS Glide Slope GS Ground Speed GS Ground Station GS Ground System GSA General Services Administration GSAT General Satellite (STS) GSCU Ground Service Cooling Unit GSDL Ground Software Development Laboratory GSE Ground Servicing Equipment GSE Ground Support Equipment GSEL Ground Support Equipment List GSFC Goddard Space Flight Center (Greenbelt, MD) GSI Government Source Inspection GSI Glide Slope Indicator GSIU Ground Standard Interface Unit GSO Ground Support Office GSO Ground Support Operations GSO Ground Systems Operations GSOC Guide Star Occultation Utility GSRP Ground Safety Review Panel GSS Ground Support Software GSS Ground Support System GSSA Ground Support Systems Activation GSSC Ground Support Simulation Computer GSSC Ground Support Systems Contractor GSSI Ground Support System Integration GST Ground System Test GSTAR General Satellite (ELV) GSTDN Ground Spacecraft Tracking and Data Network GSTDN Ground Space Flight Tracking and Data Network GSTF Ground Systems Test Flow GSU Gas Servicer Unit GSVP Ground Support Verification Plan GT Greater Than GT Ground Team GT Ground Test GT Gyro Torque GT&A Ground Test and Acceptance GTA Gas Tungsten Arc GTA Ground Test Access GTA Ground Test Article GTA Ground Torquing Assembly GTC Glycol Trim Console GTC Ground Test Conductor GTCU Ground Thermal Conditioning Unit GTI Grand Turk Island GTI Ground Test Instrumentation GTM Ground Team Manager GTM Ground Test Motor GTS General Test Support GTS GN&C Test Station GTS GNS Test Station GTU Glycol Trim Unit GUCP Ground Umbilical Carrier Plate GUI Graphical User Interface GUID Guidance GUIDO Guidance Officer GUL GSE Utilization List GUSB Guided Unified S-Band GVA GOX Vent Arm GVO Gaviota (TACAN Station) GVT Ground Vibration Test GVTA Ground Vibration Test Article GW Gross Weight GWA General Work Area GWM Guam (STDN) GWT Ground Winds Tower GYM Guaymas, Mexico (Remote Site) GYRO Gyroscope GYROA Gyro A GYROCOMP Gyrocompassing H H Altitude H Hazardous (Task Classification) H Head H Henry (SI Unit) H High H Horizontal H Hot H Momentum h Hours H Altitude Rate (H) Hazardous (Task Classification) H2 Hawaii H2 Hydrogen H2O Water H-CITE Horizontal-Cargo Integration Test Equipment H/E Heat Exchanger H/L Hardline H/O Handover H/S Heat Shield H/S IR Hardware/Software Integration Review H/T Heat Treat H/W Hardware HA Apogee Altitude HA Hazard Analysis HA High Altitude HAA High Altitude Abort HAB Habitation HABT Habitability Technology HAC Heading Alignment Center HAC Heading Alignment Circle HAC Heading Alignment Cone HAC Heading Alignment Cylinder HACBSS Homestead and Community Broadcasting Satellite Service HAD Heat Actuated Device HAFB Holloman Air Force Base HAINS High-Accuracy Inertial Navigation System HAK Horizontal Access Kit HAL High Order Articulated Language HAL High Order Assembly Language HAL High Temperature Acoustic Levitator HAL Houston Aerospace Language HAL/S High Order Assembly Language for Shuttle Flight Computer HAL/S High Order Assembly Language/Shuttle HAL/S High Order Programming Language for Spacelab Usage HALEX Halogen Lamp Experiment HALOE Halogen Occultation Experiment HAM Height Adjustment Maneuver HAO High Altitude Observatory HAP Hardware Allocation Panel HAPI High Altitude Plasma Instrument HARP Hyperbolic Analyzer Retarding Potential HAS Holddown Alignment Support HAS Hydraulic Actuation System HAS Hydrogen Actuation System HAST High Altitude Supersonic Target HAW Hawaii (STDN) HB Handbook HB High Bay HBR High Bit Rate HBT Heflex Bioengineering Test HBW Hot Bridge Wire HC Hand Controller HC Head Count HC Hybrid Computer HCED Hand Controller Engage Driver HCF High Cycle Fatigue HCF HIM Configuration File HCL Horizontal Centerline HCM Hard Copy Module HCMM Heat Capacity Mapping Mission HCR High Cross Range HCSI Hughes Communications Services, Inc. HCSL Hybrid Computation and Simulation Laboratory HCU Hydraulic Charging Unit HCV Hydrogen Check Valve HD Hoiddown HD Horizontal Drain HD Hydrogen Drain HD Highly Desirable HD Heavy Duty HDA Housekeeping Data Acquisition HDC HYbrid Device Controller HDC Hasselblad Data Camera HDDR High-Density Digital Recorder HDG Heading HDP Holddown Post HDQ Headquarters HDR High Data Rate HDRA High Data Rate Assembly HDRM High Data Rate Multiplexer HDRR High Data Rate Recorder HDRR High-data-rate recorder HDRSS High Data Rate Storage System HDS Hardware Description Sheet HDST Headset HDW Hardware HDWE Hardware HE Heat Exchange (Exchanger) HE High Energy Astrophysics He Helium HEAO High Energy Astronomy Observatory HEAP High Energy Aim Point HECV Helium Check Valve HEDS Human Exploration and Development of Space HEG Helium Gage HEGV Helium Gage Valve HEM Hitchhike Experiment Module HEMI Hemispherical (S-Band Antenna) HEMV Helium Manual Valve HEO High Energy Orbit HEPA High Efficiency Particle Accumulator HEPA High Efficiency Particle Air (Filter) HER HIM Equipment Rack HERSCP Hazardous Exposure Reduction and Safety Criteria Plan HESS High Energy Squib Simulator HETM Hybrid Engineering Test Model HEX Heat Exchanger HEX Hexadecimal HEX Hexagon HF Hard Failure HF High Frequency HF Horizontal Flight HF Hot Firing HF Hydrogen Fill HF Hyperfiltration HFA High Frequency Accelerometer HFC Heat Flow and Convection HFC Hydraulic Flight Control HFCT Hydraulic Flight Control Test HFCV Helium Flow Control Valve HFDS Hydrogen Fluid Distribution System HFE High Frequency Executive HFM Hollow Fiber Membrane HFMU High Fidelity Mockup HFO High Frequency oscillator HFS Horizontal Flight Simulator HFT Horizontal Flight Test HFTF Horizontal Flight Test Facility HFTS Horizontal Flight Test Simulator HFX High Frequency Transceiver HG High Gain HG Hitchhiker Goddard Mission Hg Mercury HGA High Gain Antenna HGAS High Gain Antenna System HGDS Hazardous Gas Detection System HGM Hot-Gas Manifold HGR Hangar HGR&SPTFAC Hangar and Support Facility HGS Hydrogen Gas Saver HGV Hydrogen Gas Valve HGVT Horizontal Ground Vibration Test HHC Hammer Head Crane HHMU Hand Held Maneuvering Unit HI High HI Honeywell, Inc. HIC Hickam Air Force Base, Hawaii (Deorb OPT site) HID Hardware Interface Device HID HIM Interface Distributor HIM Hardware Interface Module HIP Hardware Interface Program HIPC High Chamber Pressure HIPO Hierarchical Input/Process Output HIPO Hierarchy Plus Input/Process/Output HISAM Hardware Initiated Standalone Memory HIST History HITS High Rate Multiplexer Input/Output Test System HIU Headset Interface Unit HIV Helium Isolation Valve HK Housekeeping HL Hardline HL Heel Line HL High Level HL Hinge Line HL Hydrogen Line HLAL High Level Assembler Language HLD Hold HLDS Hydrogen Leak Detection System HLMT Helmet HLTL High Level Test Language HM Hinge Mount HMA Hypergot Maintenance Area HMC Hybrid Microcircuit HMC Hypergolic Maintenance and Checkout HMCC Hypergolic Maintenance and Checkout Cell HMCF Hypergolic Maintenance and Checkout Facility HMD Helmet-Mounted Display HMF Horizontal Mating Facility HMF Hypergol Maintenance Facility HMP Hydrozene Monopropeflant (RCS Propellant) HMS History Memory System HMU Hardware Mockup HMV Hydrogen Manual Valve HNDLER Handler HNGR Hangar HO Hydrogen-Oxygen HOL High Order Language HOLC High Order Language Computer HORIZ Horizon, Horizontal HOS High Order Software HOSC Huntsville Operations Support Center HP Handling Procedure HP Hewlett Packard HP High Pressure HP Hydrogen Purge HP Perigee Altitude HPF Horizontal Processing Facility (O&C) HPFD High Pressure Fuel Duct HPFTP High Pressure Fuel Turbopump HPG High Pressure Gas HPGS High Pressure Gas System HPI High Performance Insulation HPOP High Pressure Oxidizer Pump HPOT High Pressure Oxidizer Turbopump HPOTP High Pressure Oxidizer Turbopump HPPF Horizontal Payloads Processing Facility HPR Hydrogen Pressure Regulator HPRV Hydrogen Pressure Relief Valve HPS Hydraulic Power System HPT High Pressure Test HPU Hydraulic Power Unit HPV High Pressure Valve HQ Headquarters HQR Handling Qualities Rating (Cooper-Harper) HR Historical Record HR Hydrogen Relief hr Hour HRAA High Rate Acquisition Assembly HRAP High Resolution Accelerometer Package HRC Hasselblad Reflex Camera HRD Hatch Restraint Device HRD High Rate Dosimeter HRDA High Rate Data Assembly HRDM High Rate Demultiplexer HRDR High Rate Digital Recorder HRDS High Rate Data Station HRFM High Rate Frame Multiplexer HRIR High Resolution Infrared Radiometer HRL Horizontal Reference Line HRM High Rate Multiplexer HRM High Ratio Multiplier HRPS Hazard Reduction Precedence Sequence HRS Hours HRSI High Temperature Reusable Surface Insulation HROS High Resolution Objective Spectrometer HRT High Resolution Tracker HS Heat Shield HS High Speed HS Horizon Sensor HS-C Hamilton Standard CO2 Absorbent Material HSC Hardware/Software Coordination HSCU Hydraulic Supply and Checkout Unit HSD Horizontal Situation Display HSD High Speed Data HSD Hamilton Standard Division HSDL High Speed Data Line HSF Hypergot Servicing Facility HSG High Sustained Gs Acceleration HSI Horizontal Situation Indicator HSK Horizontal Sling Kit HSL Hardware Simulation Laboratory HSNG Housing HSP Health Stabilization Program HSP High Speed Printer HSR Hardware Status Register HSS High Speed Reader HSS High Stress Strain HSS Hydraulic Subsystem Simulator HST Hubble Space Telescope HSTP Hard Stop HSU Helium Service Unit HT Heat Transfer HT Height HT High Technology HTC Hybrid Technology Computer HTEXCH Heat Exchanger HTG Heating HTLL High Test Level Language HTM High Temperature HTPB Hydroxyl Terminated Polybutadiene (Propellant) HTR Heater HTR Hydroxyl Terminated Polybutyiene HTS Heat Transfer System HTS Heat Transport Section HUD Head Up Display HUDE Head Up Display Electronics HUL Hardware Utilization List HUM Humidity HUT Hard Upper Torso HV High Velocity HV High Voltage HV Hydrogen Vent HVAC Heating, Ventilating, and Air Conditioning HVDS Hypergolic Vapor Detection System HVPS High Voltage Power Supply HVR Hover HVSF Honeywell Verification Simulation Facility HVSL Holidays, Vacation, and Sick Leave HW Hardware HW Headwind HW Hotwire HW/SW Hardware/Software HWWS Hyperfiltration Wash Water Recovery System HX Heat Exchanger HXIS Hard X-ray Imaging Spectrometer HYD Hydraulic Subsystem HYD Hydraulics HYGL Hypergolic HYPACE Hybrid Programmable Attitude Control Electronics Hz Hertz (Cycles Per Second) HZE Highly Charged and Energetic Particles I I Inertias I Inner I Iodine I Irradiated I LOAD Initialization Load I&C Installation and Checkout I&C/O Installation and Checkout I&PS Institutional and Program Support I&O Inlet and Outlet I&R Interchangeability and Replaceability I&R Interchangeability and Replacement I&RS Instrument and Range Safety I&S Interchangeability and Substitutability I&T Integration and Test I-GPRF Isothermal General Purpose Rocket Furnace I-LOS Initial Data Load I/A Interface Adapter I/C Intercom I/E Input Electronics I/F Interface I/FU Interface Unit I/O Input/Output I/OB Input/Output Bus I/OC Input/Output Controller I/OMI Integration/Operations and Maintenance Instruction I/OP Input/Outboard Profile I/OT Input/Output Test I/OU Input/Output Unit I/P In Progress I/T Intertank I/V Inlet Valve IA Implementation Agency IA Input Axis IA Inverter Assembly IA Issuing Agency IA/V Internal Audio and Video IAA International Aerospace Abstracts IAB IUS Assembly Building IAC Integrated Analysis Capability IAC Interface Adapter Unit IACS Inertial Attitude Control System IAD Interface Agreement Document IAD Interface Analysis Document IAL Immediate Action Letter IAL International Algebraic Language IandC Instrument and Communication IandC Instrumentation and Communication IAM International Association of Machinists IARS Independent Air Revitalization System IAS Impact Assessment Sheet IAS Indicated Airspeed IAS Integrated Avionics System IASS Inverter/ATCS Support Structure IAT Integrated Avionics Test IAU International Astronomical Union IAV Inventory Adjustment Voucher IB Inboard IB Inert Building IB Instruction Book IBF Internally Blown Flap IBM International Business Machines IBSE Initial Blood Storage Experiment IBSS Infrared Background Signature Survey IC Incremental Cost IC Information Center IC Initial Condition IC Integrated Circuit IC Intercom (Orbiter to Ground via Hardline) IC Intercommunications IC Intercomputer IC Intercomputer Communication IC Interim Change IC Internal Combustion IC Ion Chamber IC/ES Intercommunication/Emergency Station ICA Item Change Analysis ICAO International Civil Aviation Organization ICAR Investigation and Corrective Action Report ICAT Integrated Change Assessment Team ICB Interim Change Bulletin ICB Interrupt Control Block ICBC IMAX Cargo Bay Camera ICC Intercomputer Channel ICC Intercomputer Communication ICC Interface Control Chart ICC Interstate Commerce Commission ICCB Integrated Change Control Board ICCP Interface Coordination and Control Procedure ICD Interface Control Document ICD Interface Control Drawing ICDR Incremental Critical Design Review ICDU Inertial Coupling Data Unit ICE Input Control Element ICE Instrument Checkout Equipment ICE Instrument/Communication Equipment ICF Interface Control Function ICG In-Flight Coverall Garment ICH Interchanger ICIO Interim Cargo Integration Operations ICMO Integrated Configuration Management Office ICMS Indirect Cost Management System ICMS Integrated Configuration Management System ICMS Intercom Master Station ICMT Intercontract Material Transfer ICO Integrated Checkout ICOM Intercommunications ICOS Improved Crew Optical Sight ICOU Inertial Coupling Data Unit ICP ICS Control Program ICP Inventor |
