On-orbit noise autonomous restraint method for APS star sensor
A star sensor and noise technology, applied in instruments, measuring devices, astronomical navigation, etc., can solve problems such as complex operation, performance degradation of imaging chips, long-term cost, etc., to achieve sufficient noise, suppress and eliminate airspace noise, and autonomy high effect
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[0027] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0028] The APS star sensor is an important attitude-fixing device for satellites. In order to improve the data update rate of the star sensor, the star sensor searches for the navigation star in the local sky area according to the rough attitude information provided by the whole-sky capture. Calculate the two-dimensional coordinates of the navigation star on the imaging chip in the field of view with the inertia vector and optical system parameters, and open up a prediction window with a size of 9×9 pixels as the center of the pixel where the coordinates are located, and then perform pixel traversal in this prediction window to extract The star point, and finally carry out the matching and identification of the navigation star according to the star point coordinates, and finally complete the attitude calculation.
[0029] The realizati...
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