Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esabu..69...43h&link_type=abstract
ESA Bulletin (ISSN 0376-4265), Feb. 1992, p. 43-50.
Astronomy and Astrophysics
Astronomy
1
Astrometry, Astronomical Catalogs, Data Reduction, Hipparcos Satellite, Satellite Attitude Control, Data Processing, Real Time Operation
Scientific paper
Techniques involved in the construction of the Hipparcos Star Catalogue from satellite data are described, with consideration given to the data-reduction tasks and the measurements. Particular attention is given to the three-step analysis method used in the data reduction procedure. In this method, the star-position measurements made on successive scans are projected onto a well-defined reference circle of the sky, and the origins of the different circles are solved for 'in the sphere solution' process; then the astrometric parameters of each star are solved by considering their positions on different circles built up throughout the mission. Two separate groups, known as the NDAC and the FAST Consortia, are processing the Hipparcos mission data. The NDAC includes institutes within Denmark, Sweden, and the United Kingdom; the FAST includes institutes from France, Germany, Italy, and The Netherlands.
Hog Erik
Kovalevsky Jean
Lindegren Lennart
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