Rapid generation method for starlight/inertial composite guidance missile-borne fixed star database
A composite guidance and star technology, which is used in navigation, navigation, mapping and navigation through speed/acceleration measurement. It can solve the problem of lowering the accuracy of inertial guidance, and achieve the effect of reducing the amount of calculation, speeding up the calculation and occupying less memory.
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[0048] Such as figure 2 Shown, the present invention realizes steps as follows:
[0049] 1) Get the original star database. The database should include star number ID, apparent magnitude M V , right ascension α 0 , declination δ 0 , right ascension proper dα / dt, declination proper dδ / dt and other information, the technical documentation of the database should include the reference epoch MJD adopted by the stellar database 0 , reference inertial coordinate system ICRS, and the conversion relationship between ICRS and J2000.0 geocentric agreement inertial coordinate system (hereinafter referred to as J2000.0 coordinate system)
[0050] 2) According to the magnitude M of the navigation star in the starlight / inertial composite guidance VN Requirements, remove the magnitude M from the original database V greater than M VN stars, let the number of remaining stars be N 0 .
[0051] 3) Stellar information preprocessing. According to the star's right ascension α 0 , decli...
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