SOHO Acronyms 750 SGP/OL-A 750th Space Group/Operating Location-A AAD Attitude Anomaly Detector ACE Advanced Composition Explorer ACS Attitude Control System ACU Attitude Control Unit ADC Analog to Digital Converter AFSCF Air Force Satellite Control Facility AFSCN Air Force Satellite Control Network AFT Abbreviated Functional Test AGO Santiago Ground Station AGSS Attitude Ground Support System AI Associate Investigator AIS Automated Information Security AIT Assembly, Integration and Test AIT Atomic International Time AIV Assembly-Integration-Verification AN Analog ANT Antenna ANTS Antenna Subsystem AOCE Attitude and Orbit Control Electronics AOS Acquisition of Signal AOCS Attitude and Orbit Control System AOCMS Attitude and Orbit Control Measurement System AP Application Processors APID Application Identification APM Antenna Pointing Mechanism APME Attitude Pointing Mechanism Electronics ARO Automatic Reconfiguration Order ARq Authentication Request ARs Authentication Response ASE Airborne Support Equipment ASW Address and Synchronization Word ASW Application Software AT Acceptance Testing ATSC AlliedSignal Technical Services Corporation AUX Auxiliary AVD Alternate Voice/Data BARM Block Acceptance Reporting Mechanism BAS Block Acquisition Sequence 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 - Level BITNET Because It is Time NETwork BOL Beginning of Life BRD Broadcast (MACS bus transition) BRML Block Recorder Mission Log BRU Battery Regulation Unit BSR Back Surface Reflection CAE Control and Actuation Electronic CAN Canberra (DSN Station) CBH Catalyst Bed Heater CCAFS Cape Canaveral Air Force Station CCAM Collision and Contamination Avoidance Maneuver CCB Configuration Control Board CCD Charge Coupled Device CCL Close Circuit Loop CCOM Control Center Operations Manager CCR Configuration Change Requests CCS Central Checkout System CCSDS Consultive Committee for Space Data Systems CCSM Control Center Systems Manager CCTV Close Circuit Television C&DH Command and Data Handling CDDI Copper Distributed Data Interface CDF Common Data Format (SFDU data format) CDHF Central Data Handling Facility CDMU Central Data Management Unit CDR Critical Design Review CDS Coronal Diagnostic Spectrometer CE Communications Engineer CELIAS Charge, Element and Isotope Analysis System CEPAC COSTEP-ERNE Particle Analysis Collaboration CfA Harvard-Smithsonian Center for Astrophysics, USA CM Configuration Management CM Continuus Memory Format CMD Command CMO Configuration Management Office CMP Configuration Management Plan CMS Command Management System CMSE Command Management Systems Engineer CNRS Centre National de la Recherche Scientifique 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 CRC Cyclical Redundancy Coding CRT Cathode Ray Tube CSPAAD Coarse Sun Pointing Attitude Anomaly Detection CSO Computer Security Officials CSTC Consolidated Satellite Test Center CTA Controlled Thrust Assembly CTA-21 Compatibility Test Area (JPL) CTOF Charge Time-Of-Flight CTV Compatibility Test Van CTU Central Terminal Unit Co-I Co-Investigator D/L Downlink DAA Data Availability Acknowledgment DAN Data Availability Notice dB Decibels DB Digital Bilevel acquisition dBI Decibels referenced to Isotropic gain dBm Decibels referenced to one milliwatt dBW Decibels referenced to one watt DC Direct Command DCF Data Capture Facility DCN Document Change Notice DDA Data Delivery Acknowledgement DDF Data Distribution Facility DDFM Data Distribution Facility Manager DDN Data Delivery Notice DEL Data Evaluation Laboratory DEM Demodulator DFCD Data Format Control Documents DFD Data Flow Diagram DGIB DSN/GSFC Interface Blocks DGS Diego Garcia Station DHP Direct High Power DHSS Data Handling Subsystem DL Downlink DM Data Management DML Direct Memory Load DMR Detailed Mission Requirements DMR1 Detailed Mission Requirements Issue #1 DMR2 Detailed Mission Requirements Issue #2 DMS Digital Matrix Switch DOD Department of Defense DPE Data Processing Engineer DPI Data Processing Installation DPS Data Processing Segment DQM Data Quality Message DR Discrepancy Report DRAC SOI/MDI Data Reduction and Analysis Center DS Data Set DSCC Deep Space Communications Complex (NASA/JPL) DSM Data Systems Manager DSN Deep Space Network DecNet Digital Equipment Corporation Network EAA Earth Attitude Angle EAF Experimenter's Analysis Facility EARN European Academic Research Network ECS EOF Core System EDL Ethernet Data Link 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 Experimenter's Operations Facility EOM End of Mission EPA Energetic Particle Analyzer EPHIN Electron Proton Helium Instrument EPSS Electrical Power Subsystem EPV Extended Precision Vector ER Eastern Range 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 FAC Facility FCL Foldback Current Limiter FCV Flow Control Valve FDD Flight Dynamics Division FDDI Fiber Distributed Data Interface FDE Flight Dynamics Engineers FDE Failure Detection Electronics FDF Flight Dynamics Facility FDSS Flight Dynamics Support System FDST Flight Dynamics Support Team FEHEM Front-End Hardware Emulator FEP Front-End Processors FIFO First In First Out FITS Flexible Image Transport System FM Flight Module FMI Finnish Meteorological Institute, Finland FOLAN Flight Operations Local Area Network FOP Fligth 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 FRTM Functional Requirements Traceability Matrix FSA Fine Sun-pointing Acquisition mode FSE File Server Ethernet FSM Flight Synchronizer Module FSMF Flight Software Maintenance Facility FSPAAD Fine Sun Pointing Attitude Anomaly Detection FTP File Transfer Protocol FTR Flight Tape Recorder GB Gigabyte GBRS Generic Block Recording System GCF Ground Communications Facility GDCF/Pacor ISTP Program Generic Data Capture Facility / Packet Processor GDCLS General Dynamics Commercial Launch Services (San Diego, CA) GDS Ground Data System, Goldstone (DSN station) GDSIRD Ground Data System Information Requirements Document GenSAA Generic Spacecraft Analysis Assistant GEOTAIL Geomagnetic Tail Laboratory GESS Graphics Executive Support System GEU Gyroscope Electronics Unit (same as GME) GGS Global Geospace Science GMAN General Maneuver GME Gyro Management Electronics (same as GEU) GMT Greenwich Mean Time GMU Gyro Mechanical Unit (same as GYP) GN Ground Network GOLF Global Oscillations at Low Frequency GPM Generic Payload Module GPR Greenwich Photoheliographic Results GS Ground System GSE Ground Support Equipment GSE Ground Support Electronics GSE Geocentric Solar Ecliptic GSFC Goddard Space Flight Center GSIRD Ground Data System Information Requirements Document GTAS Generic Testing and Analysis System GTDS Goddard Trajectory Determination System GW Gateway GYP Gyroscope Package (same as GMU) H/W Hardware 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 Hz Hertz I Injection I&T Integration and Test I&TRR Integration and Test Readiness Review IAC Instituto de Astrofisica de Canarias, Spain IAS Institut d'Astrophysique Spatiale, France ICA Integration Control Agreement ICD Interface Control Document ID Identification ID Idle Format IDL Interactive Data Language I/F Interface I/O Input/Output INIT Initialization IOS Indian Ocean Station IPD Information Processing Division IRD Information Requirements Document IRU Inertial Reference Unit IRV Improved Inter-Range Vector ISA Initial Sun Acquisition ISAS Institute of Space and Astronautical Science ISI Instrument/Spacecraft Interface ISG ISTP Scheduling Group ISTP International Solar-Terrestrial Physics IUE International Ultraviolet Explorer IWS Instrument Work Stations JPL Jet Propulsion Laboratory JSC Johnson Space Center Kbps Kilobits per second KCRT Keyboard CRT KSC Kennedy Space Center L Launch LAN Local Area Network LASCO White Light And Spectrometric Coronagraph LCL (switchable) Local Current Limiter LEB LASCO Electronics Box LED Low Energy Detector 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 LOS Lost of Signal LPM Launch and Parking Mode LR Low Rate LRR Launch Readiness Review LSB Least Significant Bit LSR Launch Support Room LV Latching Valve LV Launch Vehicle MACS Modular Attitude Control System MAR Mission Analysis Room MASMP Mission Analysis and Suport Management Plan MB Megabyte MCC Mid Course Correction MCP Micro Channel Plate MDI Michelson Doppler Imager MDI-H MDI-Helioseismology MDI-M MDI-Magnetogram MDUL Missing Data Units List ME Mission Engineer MECO Main Engine Cutoff MELICA Medium Energy Ion Composition Analyzer MES Main Engine Start MGE Media Generation Element MHZ Megahertz MI Mode Indicator MIL Merritt Island (GN Station) MILA Merritt Island Launch Area MIL-71 Merritt Island DSN Facility MLI Multi-Layer Insulation MMS-F Matra Marconi Space-Tolouse, France MO&DSD Mission Operations and Data Systems Directorate MOA Mission Operations Area MOC Mission Operations Center MOD Mission Operations Division MODNET MO&DSD Operational/Development Network MOM Mission Operations Manager MOR Mission Operations Review MOR Mission Operations Room MOS Maneuver Observation System MOSA Mission Operations Support Area MOSP Mission Operations Support Plan MOWG Mission Operations Working Group MP&A Mission Planning and Analysis Area MPAE Max-Planck-Institut fuer Aeronomie, Germany MPSR Monthly Project Status Review MR Medium Rate MRM Mission Readiness Manager MRR Mission Readiness Request MRT Mission Readiness Test MRTT Mission Readiness Test Team MSB Most Significant Bit MSE Mission Server Element MSR Monthly Status Report MSS Message Switching System MSSL Mullard Space Science Laboratory, UK MTASS Multi-Mission Three-Axis Stabilized Satellite MTOF Mass-Time-of-Flight MTP Mission Test Plan MTR Magnetic Tape Recorder N Newton N/A Not Applicable NASA National Aeronautics and Space Administration NASCOM NASA Communications NAV Navigation (DSN) Subsystem NCC Network Control Center ND Network Director NFS Network File System NIF Nascom Interface Facilities NMI NASA Management Instruction NMOS Network Mission Operations Support NOAA National Oceanic and Atmospheric Administration NOCC Network Operations Control Center (DSN) NOPE Network Operations Engineer NRCA Nonconformance Report and Corrective Action NRL Naval Research Laboratory, USA NRP NASA Resource Protection NRT Near Real-Time NRZ-L Non Return to Zero Level NSDP Nascom System Development Plan NSE Network Support Engineer NSI NASA Science Internet NSO National Solar Observatory NSSDC National Space Science Data Center NTM Network Test Manager NTOM Network Technical and Operations Manager Nascom NASA Communications OA Operations Agreement OBC On Board Computer OBDH On Board Data Handling OBT On-Board Time OD Orbit Determination OFA Office of Flight Assurance ORPA Operational Readiness and Performance Assurance ORR Operational Readiness Review OSC Office of Space Communications OSE Operations Simulations Engineer OSO Orbiting Solar Observatory OSSA Office of Space Science and Applications OTS Operations Testing and Simulations P/B Playback P/M Payload Module PACOR Packet Processor PAD Pressure Anomaly Detection PB Playback PC Personal Computer PCC Power Converter for CDMU PCM Pulse Code Modulation PCS Predefined Command Sequence PDB Project Data Base PDF Programmable Data Formatter PDFE Programmable Data Formatter Engineer PDI Payload Data Interleaver PDR Preliminary Design Review PDU Power Distribution Unit PHAS Payload Module (PLM) Harness Subsystem PI Principal Investigator PLM Payload Module PM Processor Module PME Pacor Mission Engineer PMOD Physikalisch-Meteorologisches Observatorium Davos PMP Project Management Plan POCC Payload Operations Control Center POLAR Polar Plasma Laboratory POP Program Operating Plan PP Post Pass PPM Parts Per Million PRD Program Requirements Document PROS Propulsion Subsystem PRTC Priority Real Time Commands PSCN Program Support Comunications Network PSK Phase Shift Keying PSM Priority Select Module PSM Project Security Manager PSS Portable Spacecraft Simulator PSTS Payload Module (PLM) Structure Subsystem PTCS Payload Module Thermal Control Subsystem PVL Parameter Value Language Pacor Packet Processor PacorII Packet Processor Data Capture Facility II QA Quality Assurance QAC Quality and Accounting Capsule QAE Quality Assurance Engineer Rad Radian R-S Reed-Solomon R/S Reed-Solomon 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 RARR Range and Range Rate RASM Remote Access Scheduling Terminal 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 Radii RS Reed-Solomon RSS Root Sum Square RT Real-time RTU Remote Terminal Unit RUST Remote User Scheduling Terminal RW Reaction Wheel RX Receive S/C Spacecraft S/W Software SAD Solar Array Deployment SAM Sun Acquisition Mode SAM System Assurance Manage SAS Solar Acquisition Sensor SCAMA Switching, Conferencing and Monitoring Arrangement SCI Real-time Science Data Format SCID Spacecraft Identification SCR Stripchart Recorder SDB Spacecraft Data Base SDPF Sensor Data Processing Facility SDR System Design Review SDS System Design Specification SECO Sustainer Engine Cutoff SELDADS Space Environment Laboratory Data Acquisition and Display System SELSIS Space Environment Laboratory Solar Imaging System SFDU Standard Formatted Data Unit SFT System Functional Test SGSS Solar Generator Subsystem SHAS Service Module (SVM) Harness Subsystem SHSS Structure and Harness Subsystem SIC Spacecraft Identification Code SID Spacecraft Identification Number SIM Simulator SIM Solar Irradiance Monitor SIP System Implementation Plan SIT System Implementation Team SK Stationkeeping SLC Space Launch Complex SM Structural Model SMIP SOHO Mission Implementation Plan SMIRD SOHO Mission Implementation Requirements Document SMM Solar Maximum Mission SMO System Management Office SMOC SOHO Science and Mission Operations Center SMOCC SOHO Mission Operations Control Center SMP Systems Management Policy SOC Science Operations Coordinator SOC Simulations Operations Center SOCA Special Operations Control Area SOHO Solar and Heliospheric Observatory SOI Solar Oscillations Investigation SOL Science Operations Leader SOP Science Operations Plan SOSA Special Operations Support Area SOT Science Operations Team SOTA Science Operations and Test Area SOWG SOHO Science Operations Working Team SPAN Space Physics Analysis Network SPD Space Physics Division SPL Split Phase Level sps Symbols per second SPOF Science Planning and Operations Facility SQL Structured Query Language SRB System Review Board SRB Solid Rocket Booster SRD System Requirements Document SRL Spacecraft Reference Line SRM Solid Rocket Motor SRR System Requirements Review SRS System Requirements Specification SSR Software Specification Review 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 SUM SOHO User's Manual SUMER Solar Ultraviolet Measurements of Emitted Radiation SVM Service Module SWAN Solar Wind ANisotropies SWT Science Working Team 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 TCOPS Trajectory Computation and Orbit Products System TCP/IP Transmission Control Protocol/Internet Protocol TCS Thermal Control Subsystem TCXO Temperature Controlled Crystal Oscillator TDA Telecommunications and Data Acquisition TDR Test Discrepancy Report TDSM Tracking and Data Systems Manager TFG Transfer Frame Generator TGS Timeline Generation System TIRIO Table of Incompatibilities and Requirements for the Instruments Operation 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 U/L Uplink UL Uplink USO Ultra Stable Oscillator UTC Universal Time Code UVCS UltraViolet Coronagraph Spectrometer VC Virtual Channel VCID Virtual Channel Identification VCXO Voltage Controlled Crystal Oscillator VID Vehicle Identification Number VIRGO Variability of solar IRradiance and Gravity Oscillations W Watts WBS Work Breakdown Structure WDE Wheel Drive Electronic WIND Interplanetary Physics Laboratory WS Work-Station WSMC Western Space and Missile Center XDR External Data Representation XMT Transmit XPNDR Transponder kbps Kilobits per second sps Symbols per second