Astronomical calibration method for synchronization of small-view-field camera and star sensor measurement reference

• Main Authors: FENG BAOMIN, HUANG YEPING, DAI WEIZONG, MENG QICHEN, SHAO ZHIJIE, LIU XIAO, GUO ZHENGYONG, SHEN QINGFENG
• Format: Patent
• Language: Chinese; English
• Published: 25.04.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; GYROSCOPIC INSTRUMENTS; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

The invention discloses an astronomical calibration method for synchronization of a small field-of-view camera and a star sensor measurement reference, and the method comprises the following steps: S1, employing a space-based small field-of-view camera and a star sensor to perform simultaneous exposure scanning of sky areas corresponding to respective fields of view, and obtaining an expected fixed star image shot by the small field-of-view camera and a satellite inertia quaternion under a star sensor measurement coordinate system; s2, the star sensor calculates fixed star vector coordinates of a fixed star in a star sensor measurement coordinate system and a space-based small-view-field camera measurement coordinate system according to measurement information of the space-based small-view-field camera and the star sensor; s3, calculating the estimated values of the measurement deviation angles of the space-based small-view-field camera and the star sensor through an optimal estimation algorithm; and S4, sett