This list is a superset of acronyms and abbreviations used in this
document.
- 2MASS
- 2 Micron All-Sky Survey
- ACA
- Aspect Camera Assembly
- ACIS
- Advanced CCD Imaging Spectrometer
- ACIS-I
- ACIS Imaging array
- ACIS-S
- ACIS Spectroscopic array
- ADU
- Analog-to-Digital Unit
- AGASC
- AXAF Guide and Aspect Star Catalog
- AGN
- Active Galactic Nucleus or Nuclei
- ARF
- Ancillary Response File
- ASC
- AXAF Science Center
- ASCA
- Advanced Satellite for Cosmology and Astrophysics
- AXAF
- Advanced X-Ray Astrophysics Facility
- BI
- Back-illuminated
- CALDB
- Calibration Data Base
- CAP
- Central Aperture Plate
- CC
- Continuous Clocking
- CCD
- Charge Coupled Device
- CCDM
- Communication, Command, and Data Management
- CCT
- Chandra Cool Targets
- CDO
- CXC Director's Office
- CfP
- Call for Proposals
- CGCD
- Crossed Grid Charge Detector
- CGRO
- Compton Gamma-Ray Observatory
- CHaRT
- Chandra Ray Tracer
- CIAO
- Chandra Interactive Analysis of Observations
- COLDEN
- Calculate Neutral Hydrogen Column Density
- COUP
- Chandra Orion Ultradeep Project
- CPS
- Chandra Proposal System or Chandra Proposal Software
- CSS
- Coarse Sun Sensor
- CTI
- Charge Transfer Inefficiency
- CXC
- Chandra X-ray Center
- CXCDS
- Chandra X-ray Center Data Systems
- CXO
- Chandra X-ray Observatory
- DEA
- Detector Electronics Assembly
- DPA
- Digital Processing Assembly
- DSN
- Deep Space Network
- EA
- Effective Area
- ECS
- External Calibration Source
- EDT
- Eastern Daylight Time
- EPHIN
- Electron Proton Helium Instrument
- ESA
- Earth Sensor Assembly
- ESC
- Engineering Support Center
- EUV
- Extreme Ultraviolet
- EXOSAT
- European X-ray Observatory Satellite
- FI
- Front-Illuminated
- FITS
- Flexible Image Transport System
- FLA
- Fiducial Light Assemblies
- FOT
- Flight Operations Team
- FOV
- Field of View
- FP
- Focal Plane
- FPC
- Flow Proportional Counter
- FSS
- Fine Sun Sensor
- FTS
- Fiducial Transfer System
- FUV
- Far-UV
- FWHM
- Full Width at Half Maximum
- GESS
- Grating Element Support Structure
- GO
- General Observer
- GSFC
- Goddard Space Flight Center
- GTO
- Guaranteed Time Observer
- HEASARC
- High Energy Astrophysics Science Archive Research Center
- HEG
- High Energy Grating
- HESS
- HETG Support Structure
- HETG
- High Energy Transmission Grating
- HETGS
- HETG Spectrometer
- HPD
- Half Power Diameter
- HRC
- High Resolution Camera
- HRC-I
- HRC Imaging Detector
- HRC-S
- HRC Spectroscopic Detector
- HRI
- High Resolution Imager
- HRMA
- High Resolution Mirror Assembly
- HXDS
- HRMA X-ray Detection System
- IDL
- Interactive Data Language
- IPI
- Instrument Principal Investigator
- IPS
- Integral Propulsion System
- IRU
- Inertial Reference Unit
- ISIS
- Interactive Spectral Interpretation System
- ISM
- Interstellar Medium
- IUS
- Inertial Upper Stage
- JPL
- Jet Propulsion Laboratory
- LESF
- Low-energy Suppression Filter
- LETG
- Low Energy Transmission Grating
- LETGS
- LETG Spectrometer
- LMXB
- Low-Mass X-ray Binary
- LRF
- Line Response Function
- LSF
- Line Spread Function
- LTS
- Long Term Schedule
- MARX
- Model of AXAF Response to X-rays
- MCP
- Micro Channel Plate
- MEG
- Medium Energy Grating
- MIT
- Massachusetts Institute of Technology
- MPE
- Max-Planck-Institut für Extraterrestrische Physik
- MSC
- Mirror Shell Coordinates
- MSFC
- Marshall Space Flight Center
- MTA
- Monitoring and Trends Analysis
- MUPS
- Momentum Unloading Propulsion System
- NASA
- National Aeronautics and Space Administration
- NASCOM
- NASA Communication system
- NGAS
- Northrop Grumman Aerospace Systems
- NMM
- Normal Maneuver Mode
- NPM
- Normal Pointing Mode
- OAC
- Orbital Activation and Checkout
- OBA
- Optical Bench Assembly
- OBC
- On-Board Computer
- OBF
- Optical Blocking Filter
- OBSCAT
- Observation Catalog
- OBSVIS
- Observation Visualizer
- OCC
- Operations Control Center
- ODB
- Optical Data Base
- OFLS
- Off-line System
- ONLS
- On-line System
- OR
- Observation Request
- OSIP
- Order Sorting Integrated Probability
- PCA
- Principal Component Analysis
- PCAD
- Pointing Control and Aspect Determination
- PDA
- Permanent Default Aimpoint
- PDF
- Portable Document Format
- PHA
- Pulse Height Amplifier (or Amplitude)
- PI
- Principal Investigator
- PIMMS
- Portable Interactive Multi-Mission Software
- PRoVis
- Pitch, Roll and Visibility tool
- PSF
- Point Spread Function
- PSMC
- Power Supply and Mechanism Controller (for ACIS)
- QE
- Quantum Efficiency
- QEU
- Quantum Efficiency Uniformity
- RCS
- Reaction Control System
- RCTU
- Remote Command and Telemetry Unit
- RMF
- Redistribution Matrix File
- RMS
- Root Mean Squared
- ROSAT
- Roentgen Satellite
- RRC
- Retroreflector Collimator
- RWA
- Reaction Wheel Assembly
- SADA
- Solar Array Drive Assembly
- SAO
- Smithsonian Astrophysical Observatory
- SI
- Science Instrument
- SIM
- Science Instrument Module
- SKIRU
- Space-Qualified Kearfott Inertial Reference Unit
- SMF
- Software Maintenance Facility
- S/N
- Signal-to-Noise ratio
- SNR
- Supernova Remnant
- SOHO
- Solar and Heliospheric Observatory
- SPIE
- Society of Photo-Optical Instrumentation Engineers
- SRON
- Laboratory for Space Research
- SSD
- Solid-State Detector
- STS
- Short Term Schedule
- TE
- Timed Exposure
- TOO
- Target of Opportunity
- UTC
- Coordinated Universal Time
- UV
- Ultraviolet
- UVIS
- UV/Ion Shield
- VCDU
- Virtual Channel Data Unit
- VETA
- Validation Engineering Test Article (mirror)
- VF
- Very Faint
- XMM
- X-ray Multi-Mirror Mission
- XRCF
- X-ray Calibration Facility
- XSPEC
- X-ray Spectral fitting package