Gaia DR1 documentation Chapter 2: Astrometric and photometric pre-processing
Abstract
This chapter presents the models and processing steps used for pre-processing the raw Gaia data before the basic observables (or astrometric elementaries) can be generated and passed on to the Gaia core astrometric solution which is discussed in Chapter 3. The input to the Gaia data processing is the raw satellite telemetry; the initial Gaia source and ecliptic poles catalogues based on compilations of other catalogues to aid in the initial crossmatches; an attitude star catalogue to allow a first reconstruction of the attitude of Gaia. The astrometric calibration models are outlined in Section 2.3 including PSF/LSF models and discussions of CCD calibration challenges followed by the details of the daily and cyclic processing steps in Section 2.4. The final Section 2.5 discusses both the daily and cyclic monitoring and validation that is performed before data products are passed on to the core astrometric solution described in Chapter 3.
- Publication:
-
Gaia DR1 documentation
- Pub Date:
- December 2017
- Bibcode:
- 2017gdr1.reptE...2H