Paper
17 April 2020 A uniform celestial sphere dividing method based on spherical rectangle
Liang Jiang, Yuanping Jing, Zhenan Qiu
Author Affiliations +
Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 114550B (2020) https://doi.org/10.1117/12.2557781
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China
Abstract
The division of the celestial sphere is the premise of star tracking algorithm for a star sensor, and the uniformity of the division is an important performance index of dividing methods. Based on analyzing existing celestial sphere dividing methods, a uniform celestial sphere dividing method based on spherical rectangle is proposed. With solid angle as the measuring basis, this method divides the celestial sphere into spherical rectangles, the boundaries of which are calculated by the solid angle integral. The celestial sphere is divided into 648 celestial sub-blocks, the solid angles of which are equal to each other. On the basis of the uniform dividing method, the navigation star sub-block table is established. Among the existing celestial sphere dividing methods, the best result is that the biggest partition is 22.86% larger than the smallest one. Compared with the existing methods, the dividing method proposed in this paper completes the uniform dividing, which has a better effect. Finally, the simulation experiment result verifies the effectiveness of the navigation star sub-block table for the star tracking algorithm.
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Liang Jiang, Yuanping Jing, and Zhenan Qiu "A uniform celestial sphere dividing method based on spherical rectangle", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 114550B (17 April 2020); https://doi.org/10.1117/12.2557781
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KEYWORDS
Stars

Optical spheres

Star sensors

Image sensors

Electro optics

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