对地观测卫星访问区域目标时间窗口快速算法

The Fast Algorithm for Time Windows of Area Target Observation Using Earth Observation Satellites

为减少对地观测卫星访问区域目标时间窗口的计算,根据建立的卫星对区域目标的观测模型,提出了卫星观测区域目标时间窗口的大圆近似快速算法,给出了算法具体步骤。仿真算例结果表明:时间窗口起点误差小于0.5 s,时间窗口长度误差小于0.723%,计算时间减少了99.87%.

To reduce the calculation of the time windows of area target observation for earth observation satellites,the fast algorithm was proposed to estimate the time windows according to the model of area target observation by satellites established using the circle locally approximation to the ground trace in this paper.The details of the algorithm were given out.The simulation results showed that the time instant errors of entry-access were smaller than 0.5 s,the period errors of the time windows were less than 0.723%,and the computation time was decreased 99.87% over the classical propagation method.