Chapter 1 | Chapter 2 | Chapter 3 | Chapter 4 | Chapter 5
Chapter 6 | Chapter 7 | Chapter 8 | Chapter 9
Appendix A | Appendix B

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Appendix B
Acronym List

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
HRC-I
HRC Imaging Detector
HRC-S
HRC Spectroscopic Detector
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 Aspect 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
SSD
Solid-State Detector
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

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Last modified:12/15/16
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