A Fast Algorithm for Imaging Time Window Prediction of Optical Satellites Considering J_2 Perturbation for Imaging Mission Scheduling

A fast algorithm for imaging time window prediction of optical satellites considering the J2 Perturbation was represented.An imaging condition equation about eccentric anomaly is drawn based on a simplified feature cone model.In order to solve the transcendental equation by Newton iteration,a hybrid method for initial value selection was presented in detail.A latitude circle was exploited to potential initial acquisition,and the characteristic of periodic drift of sub-satellite point was utilized for the initial value filtering.The experimental results show feasibility of the proposed method.