2010•Aerospace Control and ApplicationRequires access
Build a Navigation Star Catalog for Star Tracker
Hui Zhang
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Abstract
A navigation star catalog is used to identify stars and determine satellite altitudes and the capacity,content,storage mode of the navigation star catalog are vital to the function and performance of a star tracker.Through analyzing distribution of stars on the celestial sphere,the relationship between the completeness and redundancy and the number of stars appearing in the field of view of the star sensor is established.The number of navigation stars is determined,and then principles and methods choosing navigation stars from a set of candidates are given.The storage mode of navigation stars is discussed to realize quick search.Based on 2510 navigation stars with 0~6 magnitude,a navigation star catalog satisfying requirements of the star pattern recognition and attitude determination is constructed.