Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...258...46d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 258, no. 1, p. 46-52.
Astronomy and Astrophysics
Astrophysics
4
Computer Programs, Data Reduction, Hipparcos Satellite, Reference Systems, Satellite Orientation, Accuracy, Astronomical Catalogs, Astronomical Coordinates, Comparison
Scientific paper
An attitude comparison method for assessing the quality of the attitude estimates obtained by the Hipparcos data reduction consortia (FAST and NDAC) is presented. The method is illustrated by results obtained in a typical FAST-NDAC comparison developed during the attitude determination assessment phase. The aim of the attitude comparison is, initially, to assess the accuracy level of the attitude reconstructions and to point out the main errors and, when possible, their causes, so that the persons responsible for attitude in the consortia can improve their reconstruction methodologies. The second phase of the comparison starts with mass data reduction, when the efficiency of the estimation algorithms and of their software implementations have already been assessed. The tests of the celestial and instrumental reference frame definitions are powerful tools for monitoring many aspects of the data reductions at the same time.
Donati Francesco
Sechi Giacomo
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