EAS Publications Series
Volume 45, 2010GAIA: At the Frontiers of Astrometry
|Page(s)||115 - 116|
|Published online||15 February 2011|
C. Turon, F. Meynadier and F. Arenou (eds)
EAS Publications Series, 45 (2010) 115-116
Monitoring the quality of the astrometric global solution
Astronomisches Rechen-Institut, Germany
The astrometric global solution is a principal component of the final star catalogue. It is the solution of a relatively complex least-squares problem related to Gaia’s design that can only be solved using an iterative process. Hopefully we found an efficient converging algorithm with a robust stopping criterion. Nonetheless the usage of an iterative algorithm imposes some limitations on our knowledge of the statistical properties of the solution such as the variance which need to be investigated further through simulation techniques.
© EAS, EDP Sciences 2011
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