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Proceedings Paper

Three-axis star tracker
Author(s): Ben-Zion Dekel; S. Israelian; M. Garber; Gaby Birin; Ehud Zamir
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Paper Abstract

This paper describes a star tracker (ST) as a major sub-system of an autonomous satellite navigation system. The navigation system is comprised of a star tracker which determines the satellite attitude and a Global Positioning System (GPS) receiver which determines the satellite's position. The ST is based on a thermoelectrically cooled CCD camera, wide field of view optics with an optical baffle, and an electronic processing unit. The (ST) is a smart sensor that performs acquisition and recognition processes by comparing the CCD captured sky image with a stored star catalog map. The wide field of view optics makes possible the computation of the three-axis attitude from a single exposure. It also decreases the required computation time due to a need of a smaller star catalog and a more effective star identification procedure. The design consideration, star recognition algorithms, and electronic hardware are described. An accuracy of about 100 (mu) rad is expected by the use of a centroid algorithm and a special image processing technique.

Paper Details

Date Published: 13 August 1993
PDF: 9 pages
Proc. SPIE 1971, 8th Meeting on Optical Engineering in Israel: Optical Engineering and Remote Sensing, (13 August 1993); doi: 10.1117/12.151013
Show Author Affiliations
Ben-Zion Dekel, Israel Aircraft Industries Ltd. (Israel)
S. Israelian, Israel Aircraft Industries Ltd. (Israel)
M. Garber, Israel Aircraft Industries Ltd. (Israel)
Gaby Birin, Israel Aircraft Industries Ltd. (Israel)
Ehud Zamir, Israel Aircraft Industries Ltd. (Israel)


Published in SPIE Proceedings Vol. 1971:
8th Meeting on Optical Engineering in Israel: Optical Engineering and Remote Sensing

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