Method of dividing navigational star table

A navigation star and cube technology, applied in the aerospace field, can solve the problems of low retrieval efficiency, no overlap, uniformity, etc., and achieve the effect of fast retrieval and high retrieval efficiency
CN1808524AInactive Publication Date: 2006-07-26BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2006-07-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The improved method for NSTR catalogue division method comprises: dividing equally the celestial sphere into six areas with its inscribed cube then for Ní‡N sub-blocks for every area; calculating directional vector opposite to the central axis and boundary point of every sub-block to scan NSTR catalogue and ascribe every NSTR into opposite sub-block; building the partition table to store the opposite stored sub-block SN. This invention realizes the homogeneous division in rectangular coordinates system with high search efficiency.
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Description

technical field

[0001] The invention belongs to aerospace technology, and relates to an improvement on a method for dividing a navigation star table. Background technique

[0002] The star sensor is a high-precision and high-reliability attitude measurement component widely used in today's aerospace vehicles. Its working principle is: CCD (or CMOS) image sensor captures the star image within the current field of view, and the image is processed by signal. , extract the position (and brightness) information of the star in the observation field, and find the corresponding matching of the observed star in the navigation star table by the star map recognition algorithm, and finally use these matching star pairs to calculate the three-axis attitude of the star sensor. For the needs of star map recognition by star sensor, it is necessary to select stars with brightness within a certain range from the standard star table, and use these stars to form a small scale star table suitabl...

Claims

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