Rapid autonomous all-sky map fixed star identification method
A star recognition and fast technology, applied in the field of star map recognition, can solve the problems of low recognition rate, long recognition time, poor real-time performance, etc., and achieve the effect of reducing the number of redundant angular distances, improving the recognition success rate, and reducing the recognition time.
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[0078] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0079] figure 1 It is a flow chart of the present invention, assume that the full field of view of the star sensor is ω, and the threshold of the number of navigation stars is Thr_Nstar. Taking a certain star sensor product as an example, its field of view is 20°×20°, that is, ω is 20° , set Thr_Nstar to 15, star map matching angular distance threshold Thr_angle1 to 60″, projection verification meets the angular distance threshold Thr_Nangle to 5, and projection verification angular distance threshold Thr_angle2 to 35″.
[0080] by image 3 Take the observation star and navigation star in the example as an example to illustrate the whole autonomous star map identification process. Such as image 3 As shown, the selected observation stars are 1, 2, 3, 4, 5, and 6, and the corresponding navigation star numbers are 26, 35, 34, 29, 42, ...
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