Monitoring the quality of the astrometric global solution

Details Monitoring the quality of the astrometric global solution Monitoring the quality of the astrometric global solution

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011eas....45..115b&link_type=abstract

EAS Publications Series, Volume 45, 2011, pp.115-116

Astronomy and Astrophysics

Astronomy

Scientific paper

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.

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