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Instrumentation, Measurement, and Metrology

Laboratory calibration of star tracker with brightness independent star identification strategy

[+] Author Affiliations
Fei Xing

Tsinghua University, Department of Precision Instruments and Mechanology, Beijing 100084, China

Ying Dong

Tsinghua University, Department of Precision Instruments and Mechanology, Beijing 100084, China

Zheng You

Tsinghua University, Department of Precision Instruments and Mechanology, Beijing 100084, China

Opt. Eng. 45(6), 063604 (June 14, 2006). doi:10.1117/1.2213996
History: Received August 25, 2005; Revised November 02, 2005; Accepted November 18, 2005; Published June 14, 2006
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Star trackers based on charge-coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) sensors, use a brightness independent star identification strategy that requires highly accurate measurements of star spot position. Therefore, precise calibration of the measurement model is crucial. Generally, ground-based real night sky observation is a specific and costly approach. In this work, an optical laboratory method for star tracker calibration is proposed. This method is based on ordinary instruments, laser autocollimation adjustment, and image processing techniques. The calibration issues of the star tracker with a brightness independent star identification strategy are analyzed. A new laboratory calibration method is introduced, and its results on an active pixel sensor (APS) star tracker are discussed. This method proves to be practical and adequate in the development of a star tracker with wide field of view.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Fei Xing ; Ying Dong and Zheng You
"Laboratory calibration of star tracker with brightness independent star identification strategy", Opt. Eng. 45(6), 063604 (June 14, 2006). ; http://dx.doi.org/10.1117/1.2213996


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