STAR MAP IDENTIFICATION METHOD BASED ON COMPOSITE CALIBRATION STAR GRID PATTERN

A star map identification method based on a composite calibration star grid pattern is provided, which includes obtaining an observation star map, selecting a host star to be identified based on the observation star map; constructing the grid pattern features of the calibration star and performing comparison of a lookup table to obtain candidate matching results; obtaining candidate matching stars corresponding to the host star to be identified, carrying out validity verification of the initial matching results based on the FOV constraint, and filtering the candidate matching results through the calculation of angular distance and voting. The method based on the composite calibration star grid pattern uses the grid pattern as the matching pattern feature, by introducing multiple calibration star measurements, the stability of the characteristic pattern in construction is improved, and the influence of position noise and brightness noise inn the algorithm recognition process is reduced.