Brightness independent 4-star matching algorithm for lost-in-space 3-axis attitude acquisition

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Abstract

A star identification algorithm was developed for a charge-coupled device (CCD) or complementary metal-oxide-semiconductor (CMOS) autonomous star tracker to acquire 3-axis attitude information for a lost-in-space spacecraft. The algorithm took advantage of an efficient on-board database and an original 4-star matching pattern recognition strategy to achieve fast and reliable star identification. The on-board database was composed of a brightness independent guide star catalog (mission catalog) and a K-vector star pair catalog. The star pattern recognition method involved direct location of star pair candidates and a simple array matching procedure. Tests of the algorithm with a CMOS active pixel sensor (APS) star tracker result in a 99.9% success rate for star identification for lost-in-space 3-axis attitude acquisition when the angular measurement accuracy of the star tracker is at least 0.01°. The brightness independent algorithm requires relatively higher measurement accuracy of the star apparent positions that can be easily achieved by CCD or CMOS sensors along with subpixel centroiding techniques.

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APA

Dong, Y., Xing, F., & You, Z. (2006). Brightness independent 4-star matching algorithm for lost-in-space 3-axis attitude acquisition. Tsinghua Science and Technology, 11(5), 543–548. https://doi.org/10.1016/S1007-0214(06)70232-2

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