Three-axis star tracker

Ben-Zion Dekel; S. Israelian; M. Garber; Gaby Birin; Ehud Zamir

doi:10.1117/12.151013

13 August 1993 Three-axis star tracker

Ben-Zion Dekel, S. Israelian, M. Garber, Gaby Birin, Ehud Zamir

Proceedings Volume 1971, 8th Meeting on Optical Engineering in Israel: Optical Engineering and Remote Sensing; (1993) https://doi.org/10.1117/12.151013
Event: 8th Meeting in Israel on Optical Engineering, 1992, Tel Aviv, Israel

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.

Citation Download Citation

Ben-Zion Dekel, S. Israelian, M. Garber, Gaby Birin, and Ehud Zamir "Three-axis star tracker", Proc. SPIE 1971, 8th Meeting on Optical Engineering in Israel: Optical Engineering and Remote Sensing, (13 August 1993); https://doi.org/10.1117/12.151013

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