带有偏流角修正的激光雷达卫星全零多普勒姿态导引策略OA

A LiDAR satellite equipped with hyperspectral cameras is capable of performing active-passive joint detection.However,it is necessary to address the total zero Doppler attitude steer-ing method and the attitude control strategy that integrates attitude steering with drift angle cor-rection.Based on the steering coordinate system,a total zero Doppler attitude steering method parameterized by the satellite position and velocity vectors is derived,which is capable of com-pletely eliminating the residual Doppler centroid frequency.A vector-based drift angle calculation model expressed in vector form is then established,and an attitude control strategy and corre-sponding attitude computation process are proposed to correct the drift angle during the total zero Doppler steering attitude,thereby satisfying the respective attitude control requirements of active and passive payloads during joint detection.Furthermore,an approximate analytical expression of the drift angle during the total zero Doppler steering attitude is derived,and the variation of the drift angle with latitude argument,as well as its dependence on parameters such as orbital ec-centricity is analyzed.Numerical simulations are conducted for a specific mission scenario,and the results demonstrate that the proposed total zero Doppler attitude steering strategy with drift angle correction,as well as the associated analysis,is correct and effective.