Table A.1
Acronyms used in this paper.
| Acronym | Description |
|
|
|
| AC | ACross-scan (direction) |
| ADC | Analogue-to-Digital Converter |
| AF | Astrometric Field |
| AGIS | Astrometric Global Iterative Solution |
| AL | ALong-scan (direction) |
| AOCS | Attitude and Orbit Control Subsystem |
| ASD | Auxiliary Science Data (VPU) |
| AVM | AVionics Model |
| BAM | Basic Angle Monitor |
| BP | Blue Photometer |
| CCD | Charge-Coupled Device (detector) |
| CDB | Configuration DataBase |
| CDU | Clock Distribution Unit |
| CPS | Chemical Propulsion Subsystem (orbit maintenance) |
| CTI | Charge-Transfer Inefficiency |
| CU | Coordination Unit (in DPAC) |
| DCS | De-compression and Calibration Services |
| Δ-DOR | Delta Differential One-way Range |
| DIB | Diffuse Interstellar Band |
| DPAC | Data Processing and Analysis Consortium |
| DPC | Data Processing Centre |
| DR1 | (Gaia) Data Release 1 (September 2016) |
| DS | (Airbus) Defence and Space |
| EAR | Event Anomaly Report |
| EIRP | Equivalent Isotropic Radiated Power |
| EO | Extended Object |
| EPSL | Ecliptic Poles Scanning Law |
| ESA | European Space Agency |
| ESAC | European Space Astronomy Centre (ESA) |
| ESO | European Southern Observatory |
| ESOC | European Space Operations Centre (ESA) |
| ESTRACK | ESA Tracking Stations Network |
| E-SVM | Electrical SerVice Module |
| FL | First Look |
| GAIA | Global Astrometric Interferometer for Astrophysics (obsolete; now spelled as Gaia) |
| GBOT | Ground-Based Optical Tracking |
| GMSK | Gaussian Minimum Shift Keying |
| GOST | Gaia Observation Scheduling Tool |
| GSR | Global Sphere Reconstruction |
| ICRF | International Celestial Reference Frame |
| ICRS | International Celestial Reference System |
| IDT | Initial Data Treatment |
| IDU | Intermediate Data Update |
| IGSL | Initial Gaia Source List |
| INPOP | Intégrateur Numérique Planétaire de l’Observatoire de Paris (ephemerides) |
| M2MM | M2 Mirror Mechanism (focus) |
| MDB | Main DataBase |
| MIT | MOC Interface Task |
| MMH | Mono-Methyl Hydrazine |
| MOC | Mission Operations Centre (ESOC) |
| MP | Metal-Poor (star) |
| MPS | Micro-Propulsion Subsystem (science mode) |
| M-SVM | Mechanical SerVice Module |
| NSS | Non-Single Star |
| NTO | (di-)Nitrogen TetrOxide |
| OBMT | OnBoard Mission Timeline |
| OBT | OnBoard Time (realised in CDU) |
| ODAS | One-Day Astrometric Solution |
| OGA-1 | First On-Ground Attitude determination (in IDT) |
| OGA-2 | Second (and improved) On-Ground Attitude determination (in ODAS/FL) |
| PAA | Phased-Array Antenna |
| PDHU | Payload Data-Handling Unit |
| PEM | Proximity-Electronics Module (CCD) |
| PLM | PayLoad Module |
| PO | (DPAC) Project Office |
| PSF | Point Spread Function |
| QSO | Quasi-Stellar Object |
| RAFS | Rubidium Atomic Frequency Standard (part of CDU) |
| RMS | Root-Mean-Square |
| RP | Red Photometer |
| RVS | Radial-Velocity Spectrometer |
| SEA | Source Environment Analysis |
| SED | Spectral Energy Distribution |
| SIF | Service Interface Function (VPU) |
| SM | Sky Mapper (detector) |
| SOC | Science Operations Centre (ESAC) |
| SP | Star Packet (VPU) |
| SSO | Solar System Object |
| TCB | Barycentric Coordinate Time |
| TDI | Time-Delayed Integration (CCD) |
| TMA | Three-Mirror Anastigmat (telescope) |
| TODCOR | TwO-Dimensional CORrelation |
| UTC | Coordinated Universal Time |
| VPA | Video Processing Algorithms (run on the VPU) |
| VPU | Video Processing Unit (runs the VPAs) |
| WFS | Wave-Front Sensor |
| XP | Shortcut for BP and/or RP (generic name for Blue and Red Photometer) |
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