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AANM Astronomy and Astrophysics in the New Millennium Survey
ACEIT Automated Cost Estimating Integrated Tools
ACIS AXAF CCD Imaging Spectrometer
ACS Attitude Control System
ASIC Application Specific Integrated Circuit
ADAM™ ABLE Deployable Articulated Mast
ADR Adiabatic Demagnetization Refrigerator
ADRC ADR Controller
AGILE An Italian Space Agency mission
AGN Active Galactic Nucleus
AIAA American Institute of Aeronautics and Astronautics
AIRS Atmospheric Infrared Sounder
AO Announcement of Opportunity
APS Active Pixel Sensor
ASCA Advanced Satellite for Cosmology & Astrophysics
ASIC Application-Specific Integrated Circuit
ASIST Advanced System for Integration and Spacecraft Testing
AST Autonomous Star Tracker
ASTEROID A new 64 channel ASIC
ATP Authorization to proceed
AXAF Advanced X-ray Astrophysics Facility
BBXRT Broad Band X-ray Telescope
BEE Back End Electronics
BEPAC Beyond Einstein Program Assessment Committee
BH Black Hole
BHC Black Hole Candidates
BHFP Black Hole Finder Probe
BI Back-Illumination
BOL Beginning of Life
C&DH Command and Data Handling
CAD Computer-Aided Design
CAD Cost Analysis Division
CADR Continuous Adiabatic Demagnetization Refrigerator
CALDB Calibration Database
CAMEX ASIC CMOS Analog Multiplexing
CASG Cost Analysis Steering Group
CAT Critical Angle Transmission
CAT[GS] Critical Angle Transmission [Grating Spectrometer]
CBE Current Best Estimate
CCD Charge-Coupled Device
CCE Cryocooler Control Electronics
CCHPs Constant Conductance Heat Pipes
CCSDS Consultative Committee for Space Data System
CDF Chandra Deep Field South
CDR Critical Design Review
CE Control Electronics
CEH Cost Estimating Handbook
CESR Centre d’Etude Spatiale des Rayonnements
CEU Central Electronic Units
CfA Center for Astrophysics
CFRP Carbon Fiber Reinforced Plastic
CGRO Compton Gamma Ray Observatory
CIAO Chandra Interactive Analysis of Observations
CL Confidence-level
CMOS Complementary metal–oxide–semiconductor
CNES French space agency
COBE Cosmic Background Explorer
Con-X Constellation-X
COTS Commercial Off-the-Shelf
CPU Central Processing Unit
Ct Critical Temperature
DA Data Analysis
DC Direct Current
DE Dark Energy
DEA Detector Electronics Assembly
DEPFET Depleted P-channel Field Effect Transistor
DET Direct Energy Transfer
DEU Detector Electronics Unit
DM Dark Matter
DM Deployment Module
DS-1 Deep Space 1, a German mission
DS-CdTe Double-sided Strip Cadmium Telluride
DSN Deep-Space Network
DSSD Double-sided Si Strip Detector
EA Effective Area
EDU Engineering Demonstration Unit
EELV Evolved Expendable Launch Vehicle
EGSE Electrical Ground Support Equipment
ELV Expendable Launch Vehicle
EO-1 Earth Observing-1
EOB Extendable Optical Bench
EOL End of Life
EOS Earth Observing System
EoS Equations of State
EPIC European Photon Imaging Camera
EPO Education and Public Outreach
EPS Electrical and Power Subsystem
ESA European Space Agency
ESLOC Equivalent Software Lines Of Code
ETU Engineering Test Unit
EURECA European Retrievable Carrier
FCB Feedback/Controller Box
FEDS Front End Data System
FEM Finite Element Modeling
FIP Fixed Instrument Platform
FITS Flexible Image Transport System
FMA Flight Mirror Assembly
FMS Fixed Metering Structure
FOV Field of View
FPGA Field Programmable Gate Arrays
FRR Flight Readiness Review
FSW Flight Software
FTE Full Time Equivalent
FTOOLS A highly modular collection utilities FITS
FWC Filter Wheel Control Electronics
FWHM Full Width Half Maximum
FY Fiscal Year
GAS Grating Assembly Structure
GEMS Gravity and Extreme Magnetism mission
GMSEC Goddard Space Flight Center Mission Services Evolution Center
GN&C Guidance, Navigation & Control
GNC Guidance, Navigation & Control
GOES Geostationary Operational Environmental Satellites
GOES-R Geostationary Operational Environmental Satellite-R Series
GOLD Goddard Open Learning Design
GOTS Government off-the-shelf
GPD Graphical Pilot Display
GPM Global Precipitation Measurement mission
GR General Relativity
GS Ground System
GSE Ground Support Equipment
GSFC Goddard Space Flight Center
H hyperbolic
H/K housekeeping
HEASARC High Energy Astrophysics Science Archive Research Center
HEFT High Energy Focusing Telescope
HESSI High Energy Solar Spectroscopic Imager
HETG High Energy Transmission Grating
HGA High Gain Antenna
HK Housekeeping data
HPD Half Power Diameter
HQ Headquarters
HST Hubble Space Telescope
HTRS High Time Resolution Spectrometer
HUDF Hubble Ultra-Deep Field
HV High Voltage
HXI Hard X-ray Imager
HXMM Hard X-ray Telescope
HXT Hard X-ray Telescope
HZ Hydrazine
I&T Integration and Test
I/F Interface
I/O Input/Output
ICE Independent Cost Estimate
IDL Instrument Design Lab
IGM Intergalactic Medium
IIRT Integrated Independent Review Team
IM Instrument Manager
IM Instrument Module
IMAGE Imager for Magnetopause-to-Aurora Global Exploration
INAF Istituto Nazionale di Astrofisica
IP Internet Protocol
IR Infrared
ISAS Institute of Space and Astronautical Sciences
ISOC IXO Science and Operations Center
ISS International Space Station
ITAR International Traffic in Arms Regulations
ITOS Integrated Test and Operations System
IXO International X-ray Observatory
JAXA Japan Aerospace Exploration Agency
JPL Jet Propulsion Laboratory
JT Joule-Thomson cooler
JWST James Webb Space Telescope
KDP Key Decision Point
KSC Kennedy Space Center
LL Lincoln Labs
LLNL Lawrence Livermore National Labs
LM Lockheed-Martin
LMXB Low Mass X-ray Binary
LRD Launch Readiness Date
LRO Lunar Reconnaissance Orbiter
LV Launch Vehicle
LVPC Low Voltage Power Converter
MAP Microwave Anisotropy Probe
MAR Mission Assurance Requirements
MCR Mission Confirmation Review
MDL Mission Design Lab
MDP Minimum Detectable Polarization
MDR Mission Definition Review
MDS Mission Data System
MEL Master Equipment List
MEOP Maximum Expected Operating Pressure
MIP Movable Instrument Platform
MIRI Mid-InfraRed Instrument
MIXS Mercury Imaging X-ray Spectrometer
MLI Multi-Layer Insulation
MM Mass Memory
MMS Magnetosphere Multi-Scale satellite constellation
MO Mission Operations
MO&DA Mission Operations and Data Analysis
MOCM Mission Operations Cost Model
MODA Mission Operations & Data Analysis
MOR Missions Operation Review
MPE Max-Planck-Institut für Extraterrestrische Physik
MS Mission Simulation
MSFC Marshall Space Flight Center
N/A Not Available
NAR Non-Advocate Review
NASA National Aeronautics and Space Administration
NEAR Near Earth Asteroid Rendezvous
NGST Next Generation Space Telescope
NIST National Institute of Standards and Technology
NPOESS National Polar-orbiting Operational Environmental Satellite System
NRC National Research Council
NS Neutron Star
NTO Nitrogen tetroxide (or dinitrogen tetroxide), rocket fuel
OAP Optical Alignment Pathfinder
OB Optical Bench
OGS Objective Grating Spectrometer
OM Observatory Manager
OM Optics Module
OP Optical path
ORR Operations Readiness Review
P parabolic
PA Power Amplifier
PA&E Program Analysis and Evaluation
PBB Pre-Amplifier Bias Box
PDD Payload Definition Document
PDR Preliminary Design Review
PDU Power Distribution Unit
PER Pre-Environmental Review
PLF Payload Fairing
PM Project Manager
PPE Pulse Processing Electronics
PRT Positive Resistance Thermistors
PRICE-H Parametric Review of Information for Costing and Evaluation Hardware
PSE Power Supply Electronics
PSF Point Spread Function
PSR Pre-Shipment Review
QA Quality Assurance
QE Quantum Efficiency
QSO Quasi - stellar Objects
RASS ROSAT All-Sky Survey
RF Radio Frequency
RFI Request for Information
RFP Request for Proposals
RGS Reflection Grating Spectrometer
RIU Remote Interface Units
ROM Rough Order of Magnitude
ROSAT Röntgensatellit - a German X-ray satellite telescope
RVDT Rotary Variable Differential Transformer
RXTE Rossi X-ray Timing Explorer
RY Real Year
S/A Solar Array
S/C Spacecraft
S/N Signal to Noise
SAO Smithsonian Astrophysical Observatory
SAX Satellite per Astronomia X-ray
SBIL Scanning Beam Interference
SCG Study Coordination Group
SDD Silicon Drift Diodes
SDO Solar Dynamics Observatory
SDS Science Data System
SDT Science Definition Team
SE Systems Engineer
SEER-H Software Estimation and Evaluation of Resources for Hardware
SIRU Scalable Inertial Reference Unit
SLOC Software Line of Code
SM Spacecraft Module
S&MA Safety and Mission Assurance
SMAAT Suspension Mount and Alignment Transfer
SMBH Super Massive Black Hole
SMEX Small Explorer
SMILES Superconducting Submilimeter-Wave Limb-Emission Sounder
SNR Signal-to-Noise Ratio
SOC Science Operations Center
SOHO Solar and Heliospheric Observatory
SPO Silicon pore optic
SPT South Pole Telescope
SQUID Superconducting Quantum Interference Device
SR&T Supporting Research and Technology
SRR Systems Requirements Review
SRTMM Shuttle Radar Topography Mapper mission
ST Star Tracker
STEP Satellite Test of the Equivalence Principle
STEREO Solar Terrestrial Relations Observatory
SVOM Space multi-band Variable Object Monitor
SWG Science Working Group
SXS Soft X-ray Spectrometer
SXT Soft X-ray Telescope
TADS Telescope Aspect Determination System
TB Thermal Balance
TBR To Be Resolved
TCP/IP Transmission Control Protocol/Internet Protocol
TDM Time-Division-Multiplexing
TDRSS Tracking and Data Relay Satellite System
TES Transition Edge Sensor
TM Telescope Module
TMCO Technical, Management, Cost and Other
TOPEX A joint satellite mission between NASA and CNES
TRACE Transition Region Coronal Explorer
TRL Technology Readiness Level
TRMM A joint NASA and JAXA mission to monitor and study tropical rainfall
TT&C Tracking, Telemetry and Command
TWINS Two Wide- Angle Imaging Neutral-Atom Spectrometers mission
TWG Telescope Working Group
UV Ultraviolet
V&V Verification and Validation
VELA US group of satellites
VCHP Variable Conductance Heat Pipes
WBS Work Breakdown Structure
WFI Wide Field Imager
WHIM Warm-Hot Intergalactic Medium
WMAP Wilkinson Microwave Anisotropy Probe
WP White Paper
XEUS X-ray Evolving Universe Spectroscopy
XGS X-ray Grating Spectrometer
XIS X-ray Imaging Spectrometer
XMM X-ray Multi-Mirror Mission
XMS X-ray Microcalorimeter Spectrometer
XPOL X-ray Polarimeter
XQC X-ray Quantum Calorimeter
XRB X-ray Binary
XRCF X-ray Calibration Facility
XRS X-ray Spectrometer
XRT X-ray Telescope
YTD year-to-date
z redshift