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13 August 1993 Three-axis star tracker
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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.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);


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