Computer Science – Performance
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1949..216a&link_type=abstract
Proc. SPIE Vol. 1949, p. 216-227, Space Guidance, Control, and Tracking, George E. Sevaston; Jack F. Wade; Eds.
Computer Science
Performance
Scientific paper
Inertially referenced attitude determination for pointing and control is a well established need which demands continual optimization. Star trackers can accomplish the task by direct stellar measurements. This paper presents the results of design trades for Hughes Danbury Optical System's (HDOS) Advanced Star Tracker (ASTRA) products with the built in capability to output inertial attitude, typically in the form of a quaternion in an earth centered inertial (ECI) coordinate system. This is an enhanced capability from standard tracker products which only output star image centroid positions. Attitude accuracy predictions for a variety of trades have been evaluated using an orbital flight simulator. This simulator integrates star tracker performance modeling with algorithms for attitude determination. Trades include field of view (FOV) size, sensitivity, number of stars tracked and star catalog size.
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