This list is a superset of acronyms and abbreviations used in this
document.
- ACA
- Aspect Camera Assembly
- ACACAL
- ACA Calibration Data
- ACIS
- Advanced CCD Imaging Spectrometer
- ACIS-I
- ACIS Imaging array
- ACIS-S
- ACIS Spectroscopic array
- ADC
- Analog-Digital Conversion
- ADU
- Analog to Digital Unit
- AGASC
- AXAF Guide and Aspect Star Catalog
- AO
- Announcement of Opportunity
- ARD
- Analysis Reference Data
- ARF
- Ancillary Response Function
- ARM
- Alignment Reference Mirror
- ASC
- AXAF Science Center
- ASCA
- also known as Asuka, Astro-D - Japanese X-ray satellite
- ASCDS
- ASC Data Analysis System
- ASCII
- American National Standard Code for Information Exchange
- ASVT
- Avionics and Software Validation and Test (facility)
- ASPQUAL
- Aspect Solution Quality Indicators
- AXAF
- Advanced X-Ray Astrophysics Facility
- BI
- Back-illuminated
- CALDB
- Calibration Data Base
- CAP
- Command Action Procedure (used to communicate with spacecraft)
- CC
- Continuous Clocking
- CCD
- Charge Coupled Device
- CCDM
- Communication, Command, and Data Management
- CDO
- CXC Director's Office
- CDR
- Central Data Recorder (also Critical Design Review)
- CfP
- Call for Proposals
- CGCD
- Crossed Grid Charge Detector
- CHaRT
- Chandra Ray Tracer
- ChaSeR
- Chandra Search and Retrieval
- CIAO
- Chandra Interactive Analysis of Observations
- CoI
- Co-Investigator
- COLDEN
- Calculate Neutral Hydrogen Column Density
- CR
- Cosmic Ray
- CSS
- Coarse Sun Sensor
- CTE
- Charge Transfer Efficiency
- CTI
- Charge Transfer Inefficiency
- CXC
- Chandra X-ray Center
- CXCDS
- Chandra X-ray Center Data Systems
- CXO
- Chandra X-ray Observatory
- DBE
- Double Bit Error
- DEA
- Detector Electronics Assembly
- DDT
- Director's Discretionary Time
- Dec
- Declination
- DOT
- Detailed Operations Timeline
- DSN
- Deep Space Network
- DSS
- Digital Sky Survey
- EA
- Effective Area
- E/PO
- Education and Public Outreach
- EC
- Ecliptic Coordinates
- ECS
- External Calibration Source
- EDT
- Eastern Daylight Time
- EPHIN
- Electron Proton Helium Instrument
- ESA
- Earth Sensor Assembly
- ESC
- Engineering Support Center
- FAQ
- Frequently Asked Questions
- FCM
- Flux Contamination Monitor
- FEF
- FITS Embedded Function (used to generate RMF for detectors)
- FI
- Focal Plane Instrumentation (Front-Illuminated)
- FITS
- Flexible Image Transport System
- FLA
- Fiducial Light Assemblies
- FOT
- Flight Operations Team
- FOV
- Field of View
- FPSI
- Focal Plane Scientific Instruments
- FPX
- Focal Plane X
- FPY
- Focal Plane Y
- FSS
- Fine Sun Sensor
- FTA
- Fiducial Transfer Assembly
- FTS
- Fiducial Transfer System
- FUV
- Far-UV
- FWHM
- Full Width Half Maximum
- GESS
- Grating Element Support Structure
- GMST
- Greenwich Mean Sidereal Time
- GMT
- Greenwich Mean Time
- GO
- General Observer
- GSFC
- Goddard Space Flight Center
- GST
- Greenwich Sidereal Time
- GTO
- Guaranteed Time Observer
- GUI
- Graphical User Interface
- HDOS
- Hughes-Danbury Optical System
- HEASARC
- High Energy Astrophysics Science Archive Research Center
- HEG
- High Energy Grating
- HESF
- High Energy Suppression Filter
- HESS
- HETG Support Structure
- HETG
- High Energy Transmission Grating
- HETGS
- HETG Spectrometer
- HPD
- Half Power Diameter
- HQ
- Headquarters
- HRC
- High Resolution Camera
- HRI
- High Resolution Imager
- HRMA
- High Resolution Mirror Assembly
- HST
- Hubble Space Telescope
- IAU
- International Astronomical Union
- ICD
- Interface Control Document
- IDR
- Intermediate Data Record
- IDS
- Interdisciplinary Scientist
- IPI
- Instrument Principal Investigator
- IPS
- Integral Propulsion System
- IRAF
- Image Reduction and Analysis Facility
- IRU
- Inertial Reference Unit
- ISIS
- Interactive Spectral Interpretation System
- IUE
- International Ultraviolet Explorer
- IUS
- Inertial Upper Stage
- JD
- Julian Day
- JPL
- Jet Propulsion Laboratory
- KSC
- Kennedy Spaceflight Center
- LESF
- Low-energy Suppression Filter
- LETG
- Low Energy Transmission Grating
- LETGS
- LETG Spectrometer
- LGA
- Low Gain Antenna
- 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
- MJD
- Modified Julian Date
- MPE
- Max-Planck-Institut für Extraterrestrische Physik
- 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
- NDC
- NRT Data Capture
- NGST
- Northrop-Grumman Space Technology
- NISN
- NASA Integrated Services Network
- NMM
- Normal Maneuver Mode
- NOAO
- National Optical Astronomy Observatory
- NPM
- Normal Pointing Mode
- NRA
- NASA Research Announcement
- NRAO
- National Radio Astronomy Observatory
- NRT
- Near-Real Time (telemetry data)
- OAC
- Orbital Activation and Checkout
- OBA
- Optical Bench Assembly
- OBC
- On-Board Computer
- OBF
- Optical Blocking Filter
- OBSCAT
- Observing Catalog
- OBSVIS
- Observation Visualizer
- OCC
- Operations Control Center
- ODB
- Optical Data Base
- OFLS
- Off-line System
- ONLS
- On-line System
- OR
- Observation Request
- OS
- Operating System
- PCAD
- Pointing Control and Attitude Determination
- PDF
- Portable Document Format
- PDR
- Preliminary Design Review
- PH
- Pulse Height
- 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)
- PSPC
- Position Sensitive Proportional Counter
- QE
- Quantum Efficiency
- RA
- Right Ascension
- RCS
- Reaction Control System
- RCTU
- Remote Command and Telemetry Unit
- RfO
- Requests for Observations
- RMF
- Redistribution Matrix Function
- RMS
- Root Mean Squared
- ROSAT
- Roentgen Satellite
- RPS
- Remote Proposal Submission
- RRC
- Retroreflector Collimator
- RWA
- Reaction Wheel Assembly
- SADA
- Solar Array Drive Assembly
- SAO
- Smithsonian Astrophysical Observatory
- SI
- Science Instrument
- SIM
- Scientific Instrument Module
- SMF
- Software Maintenance Facility
- SNR
- Supernova Remnant
- SOHO
- Solar and Heliospheric Observatory
- SOP
- Standard Operating Procedure
- SOT
- Science Operations Team
- SSR
- Solid-State Recorder
- STS
- Short Term Schedule
- STScI
- Space Telescope Science Institute
- TAI
- International Atomic Time
- TBD
- To Be Determined
- TBR
- To Be Reviewed
- TE
- Timed Exposure
- TIM
- Technical Interchange Meeting
- TOO
- Target of Opportunity
- TS
- Telescope System, or Telescope Scientist
- UT
- Universal Time
- UTC
- Universal Time Coordinated
- UV
- Ultraviolet
- UVIS
- UV Ion Shield
- VCDU
- Virtual Channel Data Unit
- VETA
- Validation Engineering Test Article (mirror)
- WGACAT
- White-Giommi-Angelini Catalog (ROSAT)
- XMM
- X-ray Multi-Mirror Mission
- XRCF
- X-ray Calibration Facility
- XSPEC
- X-ray Spectral fitting package
- XTE
- X-ray Timing Explorer
- XUV
- Extreme Ultraviolet
Last modified:12/14/11
