AAT Anglo-Australian Telescope AC Acoustic Sensor (SESAME on Rosetta) AFM Atomic Force Microscope AGB Asymptotic Giant Branch AGN Active Galactic Nuclei AGU American Geophysical Union AO Announcement of Opportunity ASI Italian Space Agency ASIC Application Specific Integrated Circuit ASPOC Ion emitter experiment (Cluster) ATLAS Atmospheric Laboratory for Application and Science AU Astronomical Unit AURA Association of Universities for Research in Astronomy BLR Broad Line Region CASSINI Joint NASA/ESA Planetary Mission to explore Saturnian System CCD Charge Coupled Device CDS Coronal Diagnostics Spectrometer (SOHO) CEPHAG Centre d'Etude des Phenomenes Aleatoires et Geophysiques France CERN Centre Européen de Recherches Nucléaires CESR Centre d'Etude Spatial des Rayonnements CFHT Canadian-French-Hawiian Telescope CGRO Compton Gamma Ray Observatory (NASA satellite) CIR Co-rotating Interaction Region CMB Cosmic Microwave Background CME Coronal Mass Ejection CNES Centre National d'Etudes Spatiales CNR Consiglio Nazionale della Ricercha (Italy) COMPTEL Compton Telescope (CGRO) CONSERT The Comet Nucleus Sounding Experiment (Rosetta) COPUOS Committee for the Peaceful Use of Outer Space (United Nations) COSPAR Committee on Space Research COSPIN Cosmic Ray & Solar Charged Particles Investigation (Ulysses) COSTAR Corrective Optics Space Telescope Axial Replacement (HST) COSTEP Comprehensive Measurements of the Supra-Thermal and Energetic Particles Populations (SOHO) CP Charge Parity CSDS Cluster Science Data System CUI CSDS User Interface D/SCI Directorate of Scientific Programme (ESA) DARA Deutsche Agentur für Raumfahrt-angelegenheiten DESPA Observatoire de Paris, Departement d'Espace DFH Low Energy Proton Experiment (ISEE-3/ICE) DIB Diffuse Interstellar Band DISR Descent Imager/Spectral Radiometer (Huygens) DLR Deutsche Forschungs-und Versuchsanstalt für Luft- und Raumfahrt DPU Data Processing Unit DSP Digital Signal Processor DSN Deep Space Network ECF European Coordinating Facility EFOSC ESO Faint Object Spectrograph & Camera EFW Electic Field and Wave experiment (Cluster) EGS European Geophysical Society ELISMA Plasma & Wave Experiment (Mars-96) ELSPEX European Lunar South Pole Expedition EM Electrical Model, Engineering Model EOF Experiment Operations Facility (SOHO) EP Equivalence Principle EPIC European Photon Imaging Camera ERNE Energetic and Relativistic Nuclei and Electron experiment (SOHO) ESA European Space Agency ESLAB European Space Laboratory (former name of SSD) ESO European Southern Observatory ESOC European Space Operations Centre, Darmstadt (Germany) ESRIN ESA's Documentation and Information Centre (Italy) ESTEC European Space Research and Technology Centre, Noordwijk (The Netherlands) EUV Extreme Ultra-Violet EXOSAT European X-ray Observatory Satellite FAST Fundamental Astronomy by Space Techniques (Hipparcos) FEEP Field Emission Electric Propulsion FES Fine Error Sensor FIRST Far-Infrared and Sub-millimetre Space Telescope FM Flight Model FOC Faint Object Camera (HST) FOV Field of View FPAG Fundamental Physics Advisory Group FSC FIRST Science Centre FWHM Full Width at Half Maximum GAIA Global Astrometric Interferometer for Astrophysics GEM Giotto Extended Mission GG Galileo Galilei GGS Global Geospace Science GHRS Goddard High Resolution Spectrometer (HST) GINGA Japanese X-Ray Satellite GMT Greenwich Mean Time GORID Geostationary Orbit Impact Detector GPS Global Positioning System GRB Gamma Ray Burst GRO Gamma Ray Observatory (see CGRO) GSFC Goddard Space Flight Center (NASA) GSTP General Support Technology Programme (ESA) HASI Huygens Atmospheric Structure Instrument (Huygens) HCS Heliospheric Current Sheet HEMT High Electron Mobility Transistor HPOC Huygens Probe Operations Centre HRI High Resolution Imager (Einstein) HRTS High Resolution Telescope and Spectrograph HST Hubble Space Telescope IACG Inter-Agency Consultative Group for Space Science IAEA International Atomic Energy Agency IAS Institut d'Astrophysique Spatiale, Orsay (France) IAU International Astronomical Union ICC Instrument Control Centre IDT Investigation Definition Team IFSI Istituto Fisica Spazio Interplanetario (Italy) IFTS Imaging Fourier Transform Spectrometer IGPP Institute of Geophysics and Planetary Physics IKI Space Research Institute of the Russian Academy of Science IMEWG International Mars Exploration Working Group INT Isaac Newton Telescope INTA Instituto Nacional de Tècnica Aerospacial (Spain) Intermarsnet International Mars Network (ESA/NASA Study) IPAC Infrared Processing Analysis Centre IR Infrared IRAF Image Reduction & Analysis Facility IRAS Infrared Astronomy Satellite IRIS International Research of the Interior of the Sun IRMB Institut Royal Météorologique de Belgique ISAS Institute of Space and Astronautical Science (Japan) ISDC INTEGRAL Science Data Centre ISEE International Sun-Earth Explorer ISM Interstellar Medium ISO Infrared Space Observatory ISOC INTEGRAL Science Operations Centre ISSI International Space Science Institute, Bern (Switzerland) IST ISO Science Team ISTP International Solar-Terrestrial Physics IUE International Ultraviolet Explorer IUEFA IUE Final Archive IWG Implementation Working Group (Cluster) JCMT James Clerk Maxwell Telescope JOP Joint Observing Programme (SOHO) JPL Jet Propulsion Laboratory (NASA) JSOC Joint Science Operations Centre (Cluster) KSC Kennedy Space Center (NASA) LAP Langmuir Probe (Rosetta) LBV Luminous Blue Variable LDEF Long Duration Exposure Facility LECS Low Energy Concentrator Spectrometer (SAX) LEDA Lunar European Demonstration Approach LEGSPC Low Energy Gas Scintillation Proportional Counter LET Low Energy Telescope (Ulysses) LFCTR Laboratorio di Fisica Cosmica e Techologie Relative del CNR (Italy) LISA Laser Interferometer Space Antenna LMC Large Magellanic Cloud LMXRB Low Mass X-ray Binary LOI Luminosity Oscillation Imager (SOHO) LOWL Ground-based instrument for observing solar low p-modes, High Altitude Observatory, USA LPSP Laboratoire de Physique Stellaire et Planétaire (France) LTE Local Thermal Equilibrium LWP Long Wavelength Prime Camera (IUE) MCP Microchannel Plate detector MDC Mars Dust Counter MDI Michelson Doppler Imager (SOHO) MHD Magnetohydrodynamics MIDAS Micro-Imaging Data Analysing System (Rosetta) MIP Mutual Impedance Probe (Rosetta) MMS Matra Marconi Space MOC Mission Operations Centre MORO Moon Orbiting Observatory MOS-CCD Metal Oxide Semiconductor - Charge Coupled Device MPAE Max-Planck-Institut für Aeronomie MPE Max-Planck-Institut für Extraterrestrische Physik MPI Max-Planck-Institut (Germany) MPK Max-Planck-Institut für Kernphysik MSC Mass Spin Coupling experiment (STEP) MUSICOS Multi-Site Continuous Spectroscopy NAC Narrow Angle Camera (OSIRIS) NASA National Aeronautics & Space Administration (USA) NDAC Northern Data Analysis Consortium (Hipparcos) NGST Next Generation Space Telescope NICMOS Near-Infrared Camera and Multi-Object Spectrometer (HST) NLR Narrow Line Region NOAA National Oceanographic and Atmospheric Administration (USA) NOT Nordic Optical Telescope NRAO National Radio Astronomy Observatory (USA) NSI NASA Science Internet NSSDC National Space Science Data Center (at GSFC, USA) OM Optical Monitor OSIRIS Optical and Spectroscopic Remote Imaging System (Rosetta) OTAC Observing Time Allocation Committee (ISO) PAH Polycyclic Aromatic Hydrocarbon pc parsec PCD Photon Counting Detector PDEC Proposal Data Entry Centre (ISO) PDS Planetary Data System PESA Proton Electrostatic Analyser (Wind) PI Principal Investigator PLM Payload Module PMOD World Radiation Center/Physikalisch Metorologisches PMOG Radiometer developed by PMOD PP Permittivity Probe (SESAME on Rosetta) ppm parts per million PR Public Relations PROM Programmable Read-Only Memory PS Project Scientist PSF Point Spread Function PSG Project Science Group (Cassini) PWA Permitivity, Waves and Altimetry (part of HASI on Huygens) PWS Plasma Wave System (on Probos) QM Qualification Model QPO Quasi Periodic Oscillations QSO Quasi Stellar Object R&D Research and Development RAL Rutherford Appleton Laboratory (UK) RETE Research on Electric-dynamic Tether Effects (Tethered Satellite System) RE Earth radius RS Saturn radius RF Radio Frequency RMOC Rosetta Mission Operations Centre RPC Rosetta Plasma Consortium RSOC Rosetta Science Operations Centre RTG Radioisotope Thermal Generator SAO Smithsonian Astrophysical Observatory (USA) SAR Synthetic Aperture Radar SAS Small Astronomy Satellite (NASA) SASC Science Analysis Support Centre SAX Satellite per Astronomia in raggi X (Italy/The Netherlands) SciSIM Science Simulator SDS System Definition Study SED Spectral Energy Distribution SERC Science & Engineering Council (UK) SESAME Surface Electric, Seismic and Acoustic Monitoring Experiment (Rosetta) SGS Science Ground Segment SHF Short-term History File SIS Superconductor-Insulator-Superconductor SN Supernova SNR Supernova Remnant SOC Science Operations Centre SOHO Solar and Heliospheric Observatory (ESA satellite) SOLCON Solar Constant Experiment (on ATLAS and Hitchhiker) SOT Science Operations Team SPC Science Programme Committee (ESA) SPM Sun-Photometer (on VIRGO) SQUID Superconducting Quantum Interference Device SS Study Scientist SSAC Space Science Advisory Committee (ESA) SSD Space Science Department (ESA) SSP Surface Science Package (Huygens and Rosetta) SSWG Solar System Working Group ST Science Team STARS Seismic Telescope for Astrophysical Research from Space ST-ECF Space Telescope European Coordinating Facility STEP Satellite Test of the Equivalence Principle STIS Space Telescope Imaging Spectrograph STJ Superconducting Tunnel Junction STPM Structural, Thermal and Pyro Model (Huygens) STS Space Transportation System STScI Space Telescope Science Institute STSP Solar Terrestrial Science Programme SWP Short Wavelength Prime Camera (IUE) SWT Science Working Team SXT Soft X-ray Telescope (Yohkoh) SZ Sunyaev-Zeldovich Effect ToO Target of Opportunity TRP Technology Research Programme (ESA) TSS Tethered Satellite System UCB University of California Berkeley UCLA University of California Los Angeles UH Ultra-heavy (cosmic ray nuclei) ULDA Uniform Low Dispersion Archive (IUE) URSI Union Radio Scientifique Internationale USSP User Support Software Package (IUE) UV Ultra-Violet UVCS Ultra-Violet Coronal Spectrometer (SOHO) VILSPA Villafranca Satellite Tracking Station VIRGO Variability of Irradiance and Gravity Oscillations (SOHO) VLA Very Large Array VLBI Very Long Baseline Interferometry VTT Vacuum Tower Telescope WAC Wide Angle Camera (OSIRIS on Rosetta) WEC Wave Experiment Consortium (Cluster) WWW World Wide Web XMM X-ray Multi-Mirror Mission (Cornerstone) ZAMS Zero Age Main Sequence