S2.ASU.LI 1.006 Issue 2

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ACRONYMS, ABBREVIATIONS & TERMINOLOGY

CI CODE: 124 0000

Prepared by: ......................... ..... ~....~

A L

Checked by: ........................................ +@bJeQA% ........................ Date: ....................................................... 6/7/&

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Approved by: ............ luLL B D a t e : .............................. ................................................... (7 1 ((

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tz . R. 'is&!- Date: 1, ~~~~ I71-v - Authorised : ............. ..................................... ~ ................................................. -

M BACKLER

0 EADS Astrium Limited 2004

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communicated to any person without written permission from the owner.

€ADS Astrium Limited Gunnels Wood Road, Stevenage, Hertfordshire, SGI ZAS, England

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CONTENTS

1. ACRONYMS & ABBREVIATIONS ................................................................................................................5

2. TERMINOLOGY ..........................................................................................................................................12

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1. ACRONYMS & ABBREVIATIONS

Abbreviation Meaning ABCL As Built Configuration List ADP Acceptance Data Package AIT Assembly, Integration and Test AIU Actuator Interface Electronics AIV Assembly, Integration and Verification

AOCS Attitude and Orbit Control Subsystem AOM Acousto-Optic Modulator APE Absolute Pointing Error API Application Program Interface

APID Application Process ID AR Acceptance Review

ARO Automatic Reconfiguration Order ASG EADS Astrium GmbH AST Autonomous Star Tracker ASU EADS Astrium Limited ASW Application Software ATP Automated Test Procedure BC Bus Controller

BCC Battery Charge Controller BD Business Division

BIOS Basic Input Output System BOL Beginning of Life BSW Basic Software BU Business Unit

CACS Composite Attitude Control Subsystem CADM Configuration And Documentation Management CADU Channel Access Data Unit CBE Current Best Estimate CCB Configuration Control Board CCD Charge Coupled Device CCN Contract Change Notice CCS Charge Control System

CCSDS Consultative Committee for Space Data Systems CCU Caging Control Unit

CDMS Command and Data Management System CDR Critical Design Review CEI Configuration End Item

CESM Composite Emergency Safe Mode CETEF Centralised European Test Facilities

CFE Customer-Furnished Equipment CFRP Carbon Fibre Reinforced Plastic CG�S Cold Gas Micro-Propulsion subsystem CGS Cold Gas microNewton Subsystem

CI Configuration Item CIDL Configuration Item Data List CIPM Composite Inertial Pointing Mode CLCW Command Link Control Word

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CLTU Command Link Transmission Unit CM Caging Mechanism

CMNT Colloid Micro-Newton Thruster CMS Charge Management System COM Centre of Mass

COMMS Communication Subsystem COTS Commercially Off-The-Self

CP Change Proposal CPDU Command Pulse Distribution Unit CPS Chemical Propulsion System CPU Central Processor Unit CR Change Request

CRB Change Review Board CRC Cyclic Redundancy Check

CSAM Composite Sun Acquisition Mode CSM Composite Slew Mode

CVCM Collected Volatile Condensible Materials DBL Design BaseLine DC Direct Current

DDVP Design Development and Verification Plan DET Direct Energy Transfer

DFACS Drag Free Attitude Control Subsystem DIL Deliverable Items List DLL Design Limit Loads DMU Data Management Unit DOD Depth of Discharge DOF Degrees Of Freedom DRL Document Requirements List DRS Disturbance Reduction System

DRS-EA DRS Electronics assembly DRS-IS DRS Inertial Sensor DRS-OB DRS Optical Bench DRS-SA DRS Sensor Assembly

DSS Digital Sun Sensor ECP Engineering Change Proposal

EEE parts Electrical, Electronic and Electromechanical parts EEPROM Electrically-Erasable PROM

EGSE Electrical Ground Support Equipment EID Experiment Interface Document

EIDP End Item Data Package EIRP Equivalent Isotropic Radiated Power ELM Electrical Model (LTP Electrical Simulator) EM Engineering Model

EMC Electro-Magnetic Compatibility EMF Electromotive Force EMI Electro Magnetic Interference EOC End Of Charge EOL End Of Life

EPDP Electric Propulsion Diagnostic Package EPS Electrical Power System

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EQM Equipment/electrical Qualification Model EQSR Equipment Qualification and Suitability Review ESA European Space Agency ESD Electrostatic Discharge

ESOC European Spacecraft Operations Centre ESP Energetic Solar Protons

ESTEC European Space Research and Technology Centre FAR Flight Acceptance Review FCL Foldback Current Limiter FDIR Failure Detection, Isolation and Recovery FEE Front End Electronics

FEEP Field Emission Electric Propulsion FEM Finite Element Model FM Flight Model

FMECA Failure Modes Effect and Criticality Analysis F�S FEEP Micro-propulsion subsystem

FODIR Operational FDIR FOP Flight Operations Plan FoV Field of View FRR Flight Readiness Review

FSDIR Pre-operational FDIR FSS Fine Sun Sensor FSW Flight Software GA General Assembly

GaAs Gallium Arsenide GDIR General Design and Interface Requirements GDP Global Data Pool

GND SW Ground Software GRR Ground Reference Rail GRS Gravitational Reference Sensor GSE Ground Support Equipment

GSFC Goddard Space Flight Centre GSRQR Ground Segment Requirements Review

HDR Hardware Design Review HGA High-Gain Antenna HLD High Level Discrete

HOOD Hierarchical Object Oriented Design HPC High Priority Command

HPPC High Power Pulse Command HPTM High Priority Telemetry (Generated by HW) HSIA Hardware/Software Interaction Analysis I/O Input / Output

IABG Spacecraft environment Test facility IAU Integrated Avionics Unit ICD Interface Control Document IEST Institute of Environmental Sciences and Technology IOCR In-Orbit Commissioning Review IPFD Integrated Power Flux Density IRD Interface Requirements Document (Satellite/Launcher)

IS-LTP / LTP-IS Inertial Sensor of the LTP

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IST Integrated System Test ISVV Independent Software Verification and Validation ITT Invitation to Tender JPL Jet Propulsion Laboratory LCL Latching Current Limiter LCM LEOP Composite LEO Low Earth Orbit

LEOP Launch and Early Operations Phase Li-Ion Lithium-Ion LISA Laser Interferometer Space Antenna LLC Low Level Command LP Low Pressure

LRR Launcher Readiness Review LSB Least Significant Bit LTP LISA Test Package

LTP-EU / EULTP LTP Electronic Units LTP-OB / OBLTP LTP Optical Bench LTP-SA / SALTP LTP Sensor assembly (includes LTP-OB and LTP-IS)

LV Launch Vehicle LVA Launch Vehicle Adapter MAP Multiplexer Access Point MBW Measurement Band Width MCS Mission Control System

MDVE Model-based Development and Verification Environment ME Main Engine of the CPS

MEA Main Error Amplifier MEF Main engine firing

MEOP Maximum Expected Operating Pressure MGSE Mechanical Ground Support Equipment

MLI Multi-Layer Insulation MMH Mono-Methyl-Hydrazine MMI Man Machine Interface MOI Moment Of Inertia

MOSFET Metal Oxide Silicon Field Effect Transistor MoU Memorandum of Understanding MPA Micro-Propulsion Assembly (1 Thruster Cluster plus 1 PCU)

MPACS Micro-Propulsion Attitude Control Subsystem MPM Materials, Processes and Mechanical Parts MPPT Maximum Power Point Tracking MPS Micro-Propulsion System (a full set of Micro-Propulsion Assemblies) MTA MicroNewton Thrust Assembly MTL Mission Time Line MTP Mechanical, Thermal, and Propulsion Subsystem

NASA National Aeronautics and Space Administration NCR Non Conformance Report NDIU Network Data Interface Unit NEA Noise Equivalent Angle NiCd Nickel Cadmium NM Normal Mode (AOCS mode)

NMP NASA’s New Millenium Program

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NPD NASA Policy Directive NPG NASA Procedures and Guidelines program NRZ Non-Return to Zero NTO Nitrogen Tetroxide OBC On-Board Computer

OBCP On-Board Control Procedure OBDH On-Board Data Handling subsystem OBRT On-board Reference Time OBSW On-Board Software OBT On-Board Time ODE OBCP Development Environment OIRD Operations Interface Requirements Document OS Operating System

OSR Optical Solar Reflector PA Product Assurance

PCB Printed Circuit Board PCDU Power Control and Distribution Unit PCU Power Control Unit PDF Portable Document Format PDR Preliminary Design Review

PEPR Proportional Electronic Pressure Regulator PFM Proto-Flight Model PHA Preliminary Hazard Analysis PLL Phase Lock Loop PM Phase Modulation

POBT Processor On-Board Time PPS Pulse Per Second PRM Propulsion Module

PROM Programmable Read-Only Memory PSD Power Spectral Density PSK Phase-Shift Keying PT Pressure Transducer

PUS Packet Utilisation Standard PWM Pulse Width Modulation QM Qualification Model QSL Quasi-Static Load QTR Qualification Test Review Rad Radian RAM Random Access Memory RCS Reaction Control Subsystem RCT Reaction Control Thrusters of the CPS RF Radio Frequency

RFD Request for Deviation RFQ Request For Quotation RFW Request For Waiver RID Review Item Discrepancy or SW Report Identification RM Reconfiguration Module

RMU Rate Measurement Unit RNG Range ROM Read Only Memory

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RS Reed Solomon RS422 Refers to the serial data link standard

RSI Digital Relay Status RT Remote Terminal

RTB Real-time Test Bed RTEMS Real Time Executive for Multiprocessor Systems

S/C Spacecraft SADT Structured Analysis and Design Technique

SA-LTP Sensor Assembly for the LTP SAU Sensor and Actuation Unit

SBDL Standard Balanced Digital Link SCET Spacecraft Elapsed Time SciSys Science Systems (Space and Defence) Limited SCM Science Spacecraft (or Module)

SCOE Spacecraft Check Out Equipment SDE Software Development Environment

SDVE Software Design and Verification Environment SEE Single Event Effect SEU Single Event Upset

SGICD Space Ground Interface Control Document SGM Safeguard Memory

SI Système International d’unités SID Structure Identification SIS SPARC Instructional Simulator

SISO Single Input Single Output SMART Small Missions for Advanced Research and Technology

SMF Software Maintenance Facility SoC Spacecraft operating Centre SOV Software Operation Validation SOW Statement of Work SPF Single Point Failure SPT System Performance Test SRD System Requirements Document

SRDB Satellite Reference Data Base SREM Space Radiation Environment Monitor SRP Solar Radiation Pressure SRR System Requirements Review (or SW Requirements Review)

SSAC Space Science Advisory Committee SSC Source Sequence Count

SSMM Solid-state Mass Memory SSPA Solid State Power Amplifier ST-7 NASA’s Space Technology 7 program SVF Software Verification Facility SVT System Validation Test

SWDP Software Development Plan SWPAP Software Product Assurance Plan

SWPARS Software Product Assurance Requirements for Subcontractors SWRD Software Requirements Document SWRS Software Requirements Specification SWSS Software Systems Specification

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TA Thruster Assembly TAI Temps Atomique International (International Atomic Clock) TBC To Be Confirmed TBD To Be Decided TBR To Be Reviewed TC Telecommand

TCS Thermal Control Subsystem TH Thermistor

Thruster Cal Thruster Calibration mode TM Telemetry TML Total Mass Loss

TM-LTP or LTP-TM LTP Test Masses TPF Terrestrial Planet Finder TRP Technology Research Program TRR Test Readiness Review TSP Twisted Shielded Pair TTC Telemetry, Tracking and Control Subsystem TWT Travelling Wave Tube

TWTA Travelling Wave Tube Amplifier UML Unified Modelling Language UTC Universal Time Coordinates UVLA UV Lamp Assembly

VC Virtual Channel VCDU Virtual Channel Data Unit VCM Volatile Condensible Material WBS Work Breakdown Structure Wh Watt hour WP Work Package

WPD Work Package Description

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2. TERMINOLOGY Term Definition LISA PATHFINDER, LISA_PF,LISA-PF, LISAPF The complete ESA mission and the corresponding ASU project.

SMART-2 Old name for LISA PATHFINDER.

Launch Composite / Composite The complete space craft comprising of the Propulsion Module and theScience spacecraft.

Propulsion Module A part of the launch composite that is ejected before entering theoperational station

Science Spacecraft

The other part of the launch composite that accomplishes the mission.The Science spacecraft is composed of the Lisa Technology Package and Disturbance Reduction System Payloads, the SpacecraftConstituent Technology, and the platform (see below).

Space segment Same as launch composite. Used when considering the completemission by opposition with the Ground and Launch segments.

Spacecraft Constituent technology Defined by SRD to be the ensemble of FEEP micropropulsion system,Cold Gas micro-propulsion system, and the Drag-Free and Attitude Control System.

Platform The part of the science spacecraft that implements all service functions and accomodates the payload and the Spacecraft ConstituentTechnology.

Spacecraft In general ,Not used to designate any particular spacecraft. More usedas in "spacecraft technology"

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DOCUMENT CHANGE DETAILS

ISSUE CHANGE AUTHORITY CLASS RELEVANT INFORMATION/INSTRUCTIONS

1 - - Initial Issue

2 S2CA006 - Added new entries on acronyms table

DISTRIBUTION LIST

INTERNAL

EXTERNAL

EADS Astrium Gmbh ESA LTP Industrial Architect LISA PATHFINDER PI Configuration Management Library