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Abstract
In order to further improve attitude precision of star sensors, the influence of star spatial geometric distribution to attitude precision is analyzed and a method of establishing a navigation star database based on star distribution is proposed. On the basis of analyzing the current star database, Hipparcos is selected as the basic star database, while, dark-star and double-star are deleted in the star database, and then star spatial geometric distribution in every FOV (Field of View) is analyzed and compared while traversing all-sky, three stars which determine the worst attitude precision are deleted. Finally, Traversing compensationof star database is executed to ensure the uniformity of star distribution. The experimental results show that all-sky recognition rate is 100% by using the star database made by the proposed method in all celestial orbit tests, and the areas with more than 10 stars distribution r account for 97.64%. The porposed method is of good coverage, and can effectively improve the attitude accuracy.
Keywords
navigation star table
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star distribution
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attitude precision
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star sensor
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Establishment of a Navigation Star Database Based on Star Distribution.
Journal of Deep Space Exploration, 2018, 5(1): 90-96 DOI:10.15982/j.issn.2095-7777.2018.01.013
