Bollner, M. and Feucht, U. and Rupp, T. (1992) Usage of a Sun Sensor / Magnetometer combination to replace gyros within a high accuracy attitude control system. 43rd Congress of the International Astronautical Federation, Washington DC, USA, Aug 28 - Sept 5, 1992.
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Modifications of the Attitude Control System of the ROSAT spacecraft are described. The satellite has successfully performed the first all-sky survey with an imaging high precision X-ray telescope. During the following pointing observations of selected sources, severe degradation of the gyros forced a revised, restricted programme for five months. During this time the onboard software was modified to use the available magnetometer and coarse sun sensor measurements. The attitude control accuracy could thereby be improved again to allow an autonomous star acquisition by the star trackers for high precision pointing. This allowed the resumption of the nominal mission under conditions specified prior to launch.
|Document Type:||Conference or Workshop Item (Speech)|
|Additional Information:||LIDO-Berichtsjahr=1992, pages=7,|
|Title:||Usage of a Sun Sensor / Magnetometer combination to replace gyros within a high accuracy attitude control system|
|Keywords:||High accuracy pointing, star trackers, star identification, magnetic field models, onboard software modification|
|Event Title:||43rd Congress of the International Astronautical Federation, Washington DC, USA, Aug 28 - Sept 5, 1992|
|HGF - Research field:||UNSPECIFIED|
|HGF - Program:||other|
|HGF - Program Themes:||other|
|DLR - Research area:||UNSPECIFIED|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Space Operations and Astronaut Training > Hauptabteilung Raumflugmissionen|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||02 Apr 2006|
|Last Modified:||27 Apr 2009 05:19|
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