LASCO ACRONYM DICTIONARY

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

AAD

Attitude Anomaly Detector

AAS

American Astronomical Society

ACE

Advanced Composition Explorer

ACS

Attitude Control System

ACU

Attitude Control Unit

ADC

Analog to Digital Converter

ADCT

Adaptive Discrete Cosine Transform

ADS

NASA Astrophysical Data System

AFSCF

Air Force Satellite Control Facility

AFSCN

Air Force Satellite Control Network

AFT

Abbreviated Functional Test

AI

Associate Investigator

Artificial Intelligence

AIT

Assembly, Integration and Test

Atomic International Time (SeeTAI )

AIV

Assembly-Integration-Verification

AN

Analog

ANT

Antenna

ANTS

Antenna Subsystem

ApJ

The Astrophysical Journal

AOCE

Attitude and Orbit Control Electronics

AOCMS

Attitude and Orbit Control Measurement System

AOCS

Attitude and Orbit Control System

AOS

Acquisition of Signal

APID

Application Identification

APM

Antenna Pointing Mechanism

APME

Attitude Pointing Mechanism Electronics

ARC

Ames Research Center

ASIC

Application Specific Integrated Circuit

ASICA

Analytyx Spacecraft Instrument Controller ASIC

ASW

Address and Synchronization Word

Application Software

ATSC

AlliedSignal Technical Services Corporation

AU

Mean distance between the sun and the earth (1.6 million kilometers, 100 million miles, 215 solar radii)

AUX

Auxiliary

AVD

Alternate Voice/Data

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

BARM

Block Acceptance Reporting Mechanism

BAS

Block Acquisition Sequence

BPS

Bits per second (bps)

Bytes per second (Bps)

BCP1

Broadcast Pulse 1

BCP3

Broadcast Pulse 3 (LOBT clock)

BDR

Battery Discharge Regulator

BECO

Booster Engine Cutoff

BER

Bit Error Rate

BI0-L

Biphase - Low

BITNET

Because It is Time NETwork

BOL

Beginning of Life

BRU

Battery Regulation Unit

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

C1

LASCO C1 Telescope (1 - 3 solar radii)

C2

LASCO C2 Telescope (1.7 - 6 solar radii)

C3

LASCO C3 Telescope (3.7 - 32 solar radii)

CAN

Canberra (DSN Station)

CCAFS

Cape Canaveral Air Force Station

CCB

Configuration Control Board

CCD

Charge Coupled Device

CCR

Configuration Change Requests

CCS

Central Checkout System

CCSDS

Consultive Committee for Space Data Systems

CCTV

Close Circuit Television

C&DH

Command and Data Handling

CDDI

Copper Distributed Data Interface

CDF

Common Data Format

CDHF

Central Data Handling Facility

CDR

Critical Design Review

CDS

Coronal Diagnostic Spectrometer

CE

Communications Engineer

Customer Engineer

CELIAS

Charge, Element and Isotope Analysis System

CEPAC

COSTEP-ERNE Particle Analysis Collaboration

CfA

Harvard-Smithsonian Center for Astrophysics, USA

CMD

Command

CME

Coronal Mass Ejection

CMS

Command Management System

CNRS

Centre National de la Recherche Scientifique

COB

Coronagraph Optical Box

COBS

Central On Board Software

COSTEP

Comprehensive Supra Thermal and Energetic Particle Analyzer

COSTR

Collaborative Solar-Terrestrial Research

COTS

Commercial Off the Shelf Software

CPM

Command Pulse Module

CR

Carrington Rotation

CRC

Cyclical Redundancy Coding

CRT

Cathode Ray Tube

CSPAAD

Coarse Sun Pointing Attitude Anomaly Detection

CSSA

Center for Space Science and Astrophysics (Stanford)

CTOF

Charge Time-Of-Flight

Co-I

Co-Investigator

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

D/L

Downlink

DAA

Data Availability Acknowledgment

DACS

Data Acquistion Control Software (GSE)

DAN

Data Availability Notice

DAT

Digital Audio Tape

dB

Decibels

DB

Digital Bilevel acquisition

Database

DBMS

Database Management System

DC

Direct Command

DCF

Data Capture Facility

DCN

Document Change Notice

DDA

Data Delivery Acknowledgement

DDF

Data Distribution Facility

DDIS

Data Distribution GSE Software

DDN

Data Delivery Notice

Direct Dial Network

DEL

Delete

DEM

Demodulator

DFCD

Data Format Control Documents

DFD

Data Flow Diagram

DGS

Diego Garcia Station

DHP

Direct High Power

DHSS

Data Handling Subsystem

DIARAD

Dual Irradiance Absolute Radiometer (on VIRGO)

DM

Data Management

DMF

Data Management Facility

DML

Direct Memory Load

DN

Digital Number

DOD

Department of Defense

DRF

Data Reduction Facility

DSCC

Deep Space Communications Complex (NASA/JPL)

DSN

Deep Space Network

DSR

Department of Space Research, University of Birmingham, Birmingham, England

DECnet

Digital Equipment Corporation Network

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

EAA

Earth Attitude Angle

EAF

SOHO Experimenter Analysis Facility

EARN

European Academic Research Network

ECS

EOF Core System

EDL

Ethernet Data Link

EEPROM

Electrically Eraseable PROM

EGSE

Electrical Ground Support Equipment

EHP

Extended High Power

EHPC

Extended High Priority Command

EID

Experiment Interface Document

EIT

Extreme-ultraviolet Imaging Telescope

ELEC

Electronics

ELV

Expendable Launch Vehicle

EM

Engineering Model

EOF

SOHO Experimenter's Operations Facility

EOM

End of Mission

EPA

Energetic Particle Analyzer

EPHIN

Electron Proton Helium Instrument

EPSS

Electrical Power Subsystem

ERNE

Energetic and Relativistic Nuclei and Electron Experiment

ESA

European Space Agency

ESDOC

European Science Data and Operations Center

ESMC

Eastern Space and Missile Center

ESOC

European Space Operations Centre (ESA, Darmstadt)

ESPOCC

European Space Project Operations Control Center

ESR

Emergency Sun Reacquisition

ESTEC

European Research and Technology Center

ESTRACK

European Space Tracking (Network)

Ethernet

Local area network defined by ISO 802.3

EU

Engineering Unit

EUV

Extreme Ultra-Violet

EXP

Experiment

Exposure

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

FAC

Facility

FDD

Flight Dynamics Division

FDDI

Fiber Distributed Data Interface

FDF

Flight Dynamics Facility

FDSS

Flight Dynamics Support System

FEE

Front-End Equipment

FFT

Fast Fourier Transform

FIFO

First In First Out

FITS

Flexible Image Transport System

FM

Flight Module

FMI

Finnish Meteorological Institute, Finland

FPEB

Fabry-Perot Electronics Box

FP, FPI

Fabry-Perot Interferometer

FOP

Flight Operations Plan

FOR

Flight Operations Review

FOT

Flight Operations Team

FOV

Field of View

FPSS

Fine Pointing Sun Sensor

FPSSE

Fine Pointing Sun Sensor Electronics

FPSSH

Fine Pointing Sun Sensor Head

FRD

Functional Requirements Document

FRR

Flight Readiness Review

FSA

Fine Sun-pointing Acquisition mode

FSPAAD

Fine Sun Pointing Attitude Anomaly Detection

FTP

File Transfer Protocol

FTR

Flight Tape Recorder

FWHM

Full Width at Half Maximum

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

GB

Gigabyte

GDCF/Pacor

ISTP Program Generic Data Capture Facility / Packet Processor

GDS

Ground Data System, Goldstone (DSN station)

GenSAA

Generic Spacecraft Analysis Assistant

GEOTAIL

Geomagnetic Tail Laboratory

GGS

Global Geospace Science

GI

Guest Investigator

GIF

Graphics Image Format

GIGO

Garbage In Garbage Out

GMT

Greenwich Mean Time

GO

Guest Observer

GOLF

Global Oscillations at Low Frequency

GONG

Global Oscillations Network Group

GS

Ground System

GSE

Ground Support Equipment

Ground Support Electronics

Geocentric Solar Ecliptic Coordinate System:
A 3-axis (x,y,z) coordinate system, with the Earth at its center, and where the x-axis points to the Sun, the z-axis is perpendicular to the Ecliptic plane, and the y-axis is perpendicular to both the x and z axies with a positive direction opposite to the Earth's motion around the Sun.

GSFC

Goddard Space Flight Center

GSIRD

Ground Data System Information Requirements Document

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

H/W

Hardware

HAO

High Altitude Observatory, NCAR, Boulder, CO

HBR

High Bit Rate

HDR

Hardware Design Review

HED

High Energy Detector

HGA

High Gain Antenna

HK

Housekeeping

HOI

Halo Orbit Insertion

HOP

Halo Orbit Phase

HQ

Headquarters

HR

High Rate

HSIO

High Speed Input/Output

HTML

Hypertext Markup Language

HTTP

Hypertext Transfer Protocol

Hz

Hertz

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

I&T

Integration and Test

I&TRR

Integration and Test Readiness Review

IAC

Instituto de Astrofisica de Canarias, Spain

IAS

Institut d'Astrophysique Spatiale, Orsay, France

ICA

Integration Control Agreement

ICD

Interface Control Document

ICE

Instrument Control Executive

ID

Identification

Idle Format

IDL

Interactive Data Language from Research Systems, Inc

I/F

Interface

IKI

Institut Kosmicheskikh Issledovanii

I/O

Input/Output

INIT

Initialization

INTSIM

S/C Interface Simulator

IOS

Indian Ocean Station

IP

Internet Protocol

IPD

Information Processing Division

IRD

Information Requirements Document

IRU

Inertial Reference Unit

ISA

Initial Sun Acquisition

ISAS

Institute of Space and Astronautical Science

ISTP

International Solar-Terrestrial Physics

IUE

International Ultraviolet Explorer

IWS

Instrument Work Stations

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

JD

Julian Day. Obtained by counting days from the starting point of noon on 1 January 4713 BC (Julian Day zero).

JPL

Jet Propulsion Laboratory

JSC

Johnson Space Center

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Kbps, kbps

Kilobits per second

Kilobytes per second (Kbps)

KPNO

Kitt Peak National Observatory

KSC

Kennedy Space Center

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

L

Launch

LAN

Local Area Network

LAS

Laboratoire d'Astronomie Spatiale, Marseille, France

LASCO

Large Angle Spectrometric Coronagraph

LCL

Latching Current Limiter

LEB

LASCO Electronics Box

LED

Low Energy Detector

Light Emitting Diode

LEOP

Launch and Early Orbit Phase

LeRC

Lewis Research Center

LGA

Low Gain Antenna

LION

Low Energy Ion and Electron Instrument

LOBT

Local On Board Time

LOI

Luminosity Oscillations Imager (on VIRGO)

LOS

Loss of Signal

LP

LEB Program

LPARL

Lockheed Palo Alto Research Laboratories

LR

Low Rate

LRR

Launch Readiness Review

LSB

Least Significant Bit

LV

Launch Vehicle

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

MAR

Mission Analysis Room

MB

Megabyte

MCC

Mid Course Correction

MCP

Micro Channel Plate

MDI

Michelson Doppler Imager

MDI-H

MDI-Helioseismology

MDI-M

MDI-Magnetogram

MECO

Main Engine Cutoff

MELICA

Medium Energy Ion Composition Analyzer

MES

Main Engine Start

MHZ

Megahertz

MIL

Merritt Island (GN Station)

MILA

Merritt Island Launch Area

MIL-71

Merritt Island DSN Facility

MJD

Modified Julian Date - Equal to the Julian Day, but shifted so its origin occurs at midnight on 17 November 1858. The MJD differs from the Julian date by exactly 2 400 000.5 days. The MJD of the SOHO launch on 5 Dec 1995, is 50056.

MLI

Multi-Layer Insulation

MMS-F

Matra Marconi Space-Toulouse, France

MMS-UK

Matra Marconi Space-Portsmouth, United Kingdom

MO&DA

Mission Operations and Data Analysis

MO&DSD

Mission Operations and Data Systems Directorate

MOA

Mission Operations Area

MOC

Mission Operations Center

MODNET

MO&DSD Operational/Development Network

MOM

Mission Operations Manager

MOR

Mission Operations Review

Mission Operations Room

MOWG

Mission Operations Working Group

MP&A

Mission Planning and Analysis Area

MPAE

Max-Planck-Institut fuer Aeronomie, Germany

MR

Medium Rate

MSB

Most Significant Bit

MSSL

Mullard Space Science Laboratory, UK

MTOF

Mass-Time-of-Flight

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

N/A

Not Applicable

NASA

National Aeronautics and Space Administration

NASCOM

NASA Communications

NFS

Network File System

NOAA

National Oceanic and Atmospheric Administration

NOAO

National Optical Astronomy Observatories

NOCC

Network Operations Control Center (DSN)

NRL

Naval Research Laboratory, USA

NRT

Near Real-Time

NRZ-L

Non Return to Zero Level

NSI

NASA Science Internet

NSO

National Solar Observatory

NSSDC

National Space Science Data Center

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

OBC

On Board Computer

OBDH

On Board Data Handling

OBE

Observation Executive

OBT

On-Board Time

OSO

Orbiting Solar Observatory

OSSA

Office of Space Science and Applications

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

P/B

Playback

P/M

Payload Module

PACOR

Packet Processor

PACORII

Packet Processor Data Capture Facility II

PAD

Pressure Anomaly Detection

PB

Playback

PC

Personal Computer

PCE

PROM Card Executive

PCM

Pulse Code Modulation

PDB

Project Data Base

PDR

Preliminary Design Review

PDU

Power Distribution Unit

PI

Principal Investigator

PLM

Payload Module

PMOD

Physikalisch-Meteorologisches Observatorium Davos

PMP

Project Management Plan

POCC

Payload Operations Control Center

POLAR

Polar Plasma Laboratory

PROM

Programmable Read Only Memory

PROS

Propulsion Subsystem

PRTC

Priority Real Time Commands

PSK

Phase Shift Keying

PVL

Parameter Value Language

PZT

Piezoelectric Transducer

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

QA

Quality Assurance

QAC

Quality and Accounting Capsule

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Rad

Radian

R/T

Real-Time

RAAD

Roll Attitude Anomaly Detection

RAAM

Roll Attitude Acquisition Mode

RAD

Roll Attitude Determination

RAL

Rutherford Appleton Laboratory, UK

RAM

Random Access Memory

RCR

Remote Command Request

RD

Reference Document

RDBMS

Relational Data Base Management System

Re

Earth Radii

RF

Radio Frequency

RFDU

Radio Frequency Distribution Unit

RID

DSN Station at Madrid, Spain

RID

Review Item Disposition

RM

Reconfiguration Module

RMW

Roll Maneuver Wheels

ROM

Read Only Memory

RPC

Remote Procedure Calls

RPR

Remote Procedure Request

rpm

Revolutions per minute

RRAD

Roll Rate Anomaly Detection

Rs

Solar Radius

RS, R/S, R-S

Reed-Solomon

RSS

Root Sum Square

RT

Real-Time

RTU

Remote Terminal Unit

RUST

Remote User Scheduling Terminal

RW

Reaction Wheel

RX

Receive

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

S/C

Spacecraft

S/W

Software

SAD

Solar Array Deployment

SAM

Sun Acquisition Mode

SAS

Solar Acquisition Sensor

SCAMA

Switching, Conferencing and Monitoring Arrangement

SCI

Real-time Science Data Format

SCID

Spacecraft Identification

SDB

Spacecraft Data Base

SDPF

Sensor Data Processing Facility

SDR

System Design Review

SECO

Sustainer Engine Cutoff

SEC

NOAA Space Environment Center

SEL

NOAA Space Environment Laboratory

SELDADS

SEL Data Acquisition and Display System

SELSIS

SEL Solar Imaging System

SEU

Single Event Upset

SFDU

Standard Formatted Data Unit

SFT

System Functional Test ST

Sidereal Time: The measure of time defined by the apparent diurnal motion of the vernal equinox, hence, a measure of the rotation of the Earth with respect to the reference frame that is related to the stars rather than the Sun. Two types of sidereal time are used in astronomy: mean sidereal time and apparent sidereal time. One sidereal day is equal to about 23 hours, 56 minutes and 4.090 seconds of mean solar time. Also 366.2422 mean sidereal days equal 365.2422 mean solar days.

SIM

Simulator

Solar Irradiance Monitor

SLC

Space Launch Complex

SM

Structural Model

SMIP

SOHO Mission Implementation Plan

SMIRD

SOHO Mission Implementation Requirements Document

SMM

Solar Maximum Mission

SMOC

SOHO Science and Mission Operations Center

SMOCC

SOHO Mission Operations Control Center

SOC

Science Operations Coordinator

Simulations Operations Center

SOCA

Special Operations Control Area

SOHO

Solar and Heliospheric Observatory

SOI

Solar Oscillations Imager

Solar Oscillations Investigation

SOL

Science Operations Leader

SOP

Science Operations Plan

SOT

Science Operations Team

SOTA

Science Operations and Test Area

SOWG

SOHO Science Operations Working Team

SPAN

Space Physics Analysis Network

SPD

Solar Physics Division

Space Physics Division

SPDS

Space Physics Data System

Solar Physics Data System

SPL

Split Phase Level

SPM

Sunphotometer (on VIRGO)

SPOF

Science Planning and Operations Facility

SQL

Structured Query Language

SRB

System Review Board

SRB

Solid Rocket Booster

SRD

System Requirements Document

SRM

Solid Rocket Motor

SRR

System Requirements Review

SRS

System Requirements Specification

SSD

Space Sciences Division

SSR

Software Specification Review

Solid State Recorder

SSTS

Service Module (SVM) Structure Subsystem

SSU

Star Sensor Unit

STC

Satellite Test Center

STCS

Service Module Thermal Control Subsystem

STDN

Spaceflight Tracking and Data Network

STOF

Suprathermal-Time-Of-Flight

STOL

System Test and Operations Language

STR

System Test Review

STS

Star Tracker Sensor

STSP

Solar Terrestrial Science Programme

SU

Stanford University

SUM

SOHO User's Manual

SUMER

Solar Ultraviolet Measurements of Emitted Radiation

SVM

Service Module

SWAN

Solar Wind ANisotropies

SWT

Science Working Team

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

T&DA

Telemetry and Data Acquisition

T&DS

Tracking and Data Systems/JPL

TAB

Timing and Acquisition Bit

TAC

Telemetry and Command Computer

TAI

Temps Atomique International

TBC

To Be Confirmed

TBD

To Be Defined

TC

Telecommand

TCP

Transmission Control Protocol

TCS

Thermal Control Subsystem

TDA

Telecommunications and Data Acquisition

TDR

Test Discrepancy Report

TLA

Three Letter Acronym

TLAN

TPOCC LAN

TLM

Telemetry

TOD

Time-out detection

TPOCC

Transportable POCC

TR

Tape Recorder

TRB

TDR Review Board

TRK

Tracking

TRPSA

Transponder Assembly

TRR

Test Readiness Review

TSTOL

TPOCC System Test and Operations Language

TT

Time-Tagged

TT&C

Telemetry, Tracking and Command

TTB

Time-Tagged Buffer

TTI

Transfer Trajectory Insertion

TTP

Transfer Trajectory Phase

TVCF

Transportable Vehicle Checkout Facility

TTY

Teletype

TX

Transmit

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

UL, U/L

Uplink

UPS

Uninterruptable Power Supply

URL

Uniform Resource Locator

USO

Ultra Stable Oscillator

UT

Universal Time

UTC

Coordinated Universal Time

Universal Time Code

A coordinated time scale, maintained by the Bureau Interanational des Poids et Mesures (BIPM). A UTC clock has the same rate as a TAI clock, but differs by an integral number of seconds called leap seconds.

UV

Ultraviolet

UVCS

UltraViolet Coronagraph Spectrometer

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

VC

Virtual Channel

VCID

Virtual Channel Identification

VCXO

Voltage Controlled Crystal Oscillator

VDS

Virtual Data Set

VID

Vehicle Identification Number

VIRGO

Variability of solar IRradiance and Gravity Oscillations

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

W

Watts

WBS

Work Breakdown Structure

WDE

Wheel Drive Electronic

WIND

Interplanetary Physics Laboratory

WS

Work-Station

WSMC

Western Space and Missile Center

WSO

Wilcox Solar Observatory

WWW

World Wide Web

WYSIWYG

What You See Is What You Get

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

XDR

External Data Representation

XMT

Transmit

XPNDR

Transponder

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

This page last revised 22 May 1997