Dynamic compensation method for attitude angle errors of optical remote sensing satellite based on ground navigation
A satellite attitude and optical remote sensing technology, applied in the field of optical remote sensing satellite data processing, can solve the problems of attitude angle error, excessive control point selection range, difficult decoupling, etc., and achieve the effect of improving geometric positioning accuracy
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[0074] The main factors affecting the positioning accuracy of high-resolution optical remote sensing satellites include attitude data accuracy, orbit data accuracy and on-board time synchronization accuracy. Using today's orbit determination technology, such as dual-frequency differential GPS orbit determination accuracy can reach the meter level or even higher; the current satellite time synchronization accuracy can reach the microsecond level, such as the satellite time synchronization accuracy is 1ms, and the satellite speed is 7.6 km / s, the satellite position deviation caused by time asynchrony is 0.44m; however, it is difficult to measure the attitude of the satellite, and the systematic error, long-period error and random error in the attitude angle have a great influence on the geometric positioning accuracy. Automatic, Real-time and accurate calibration of attitude data errors and compensation can greatly improve the geometric positioning accuracy of images.
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