Gaia: Relativistic modelling and testing

Gaia is an ambitious space astrometry mission of ESA with a main objective to map the sky in astrometry and photometry down to a magnitude 20 by the end of the next decade. Given its extreme astrometric accuracy and the repeated observations over five years, the observation modelling is done in a fu...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2009-04, Vol.5 (S261), p.306-314
Main Authors: Mignard, F., Klioner, S. A.
Format: Article
Language:English
Subjects:
Astronomy
Contributed Papers
Data processing
Gravity
Spacecraft
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Summary:Gaia is an ambitious space astrometry mission of ESA with a main objective to map the sky in astrometry and photometry down to a magnitude 20 by the end of the next decade. Given its extreme astrometric accuracy and the repeated observations over five years, the observation modelling is done in a fully relativistic framework and several tests of General Relativity or of its extensions can be carried out during the data processing. The paper presents an overview of the current activities in this area and of the expected performances.
ISSN:1743-9213
1743-9221
DOI:10.1017/S174392130999055X