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Table A.1
Below, we give a list of acronyms and useful concepts used in this paper.
| Acronym | Description |
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| AC | ACross scan: direction on the focal plane perpendicular to the scan direction |
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| AF | Astrometric Field: the 62 astrometric CCDs on the focal plane |
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| APASS | AAVSO Photometric All-Sky Survey |
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| BP | Blue Photometer: the system containing the blue dispersion prism. Also refers to the associated CCDs |
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| CCD | Charge-coupled Device |
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| CCD transit | Transit of a source across a single CCD |
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| CMC15 | Carlsberg Meridian Catalogue, Number 15 |
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| EPSL | Ecliptic Pole Scanning Law:the scanning law of the satellite, where it is pointing as a function of time, during the first month of observations. See Gaia Collaboration (2016b) for more details on the various scanning laws of Gaia |
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| ESA | European Space Agency |
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| FoV | Field of View:one of the two pointing directions of the satellite telescopes. See (Gaia Collaboration 2016b) for more information regarding the structure of Gaia |
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| FoV transit | Field-of-view transit, the complete transit of a source across the focal plane |
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| IPD | Image Parameter Determination: the task that generates the fluxes that are calibrated as described in Carrasco et al. (2016). This task also generates the raw astrometry. See Fabricius et al. (2016) for more details |
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| LS | Large-scale: usually referred to in the context of the relevant photometric calibration |
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| LSF | Line Spread Function |
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| OBMT | On-board Mission Timeline:the timescale usually used when referring to time in the Gaia context. This scale is defined in Gaia Collaboration (2016b) |
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| RP | Red Photometer:the system containing the red dispersion prism. Also refers to the associated CCDs |
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| SDSS | Sloan Digital Sky Survey |
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| SS | Small-scale: usually referred to in the context of the relevant photometric calibration |
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| SSC | Spectrum Shape Coefficient:equivalent of a medium-band colour. These are defined in Carrasco et al. (2016) |
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| TDI | Time-delayed Integration (CCD) |
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