1992•Research at the University of Copenhagen (University of Copenhagen)Requires access
The NDAC Hipparcos data analysis consortium. Overview of the reduction methods
L. Lindegren, Erik Høg, Floor van Leeuwen, Catriona Anne Murray, Dafydd Wyn Evans, Margaret J. Penston, M. A. C. Perryman, Carsten Sand Petersen, Natarajan Ramamani, M. A. J. Snijders, S. Söderhjelm, G. K. Andreasen, A. M. Cruise, N. Elton, N. Lund, Kristjan Põder
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Abstract
This paper gives an overview of the assumptions and algorithms adopted by the Northern Data Analysis Consortium (NDAC) for the reduction of data from the space astrometry satellite Hipparcos. A fairly detailed account is given of the main steps of the reduction, viz., the attitude determination, analysis of image dissector tube data, great-circle reductions and sphere solution. Of these, only aspects of the attitude determination have required substantial revision due to the satellite's failure to reach geostationary orbit. A brief outline is given of the instrument calibrations and the analysis of non-single stars