基于高程信息的卫星访问计算方法

Satellite Access Calculate Method Based on Altitude Information

成像卫星任务规划的基础是访问分析,而其核心是计算卫星对目标的访问信息,即卫星对目标的观测时间和观测姿态角度。现有卫星任务管控系统中使用的卫星访问信息计算方法通常没有考虑目标高程信息,这使得对高海拔地区目标的观测姿态角度计算不够准确。提出一种基于目标高程信息改进的卫星访问信息计算方法,在构建卫星与目标的空间计算模型时,考虑目标的高程信息,计算得出更为准确的观测姿态角度,使得按此角度做规划后的卫星能够精确地拍摄到目标位置。实验结果表明,该算法降低了系统误差,提高了卫星观测精度。

Imaging satellite mission planning is based on access analysis,whose core is to calculate the satellite access information to the target,i.e.,the observation time and observation angle of the satellite to the target.In existing satellite mission control systems,the method of calculating satellite access information usually does not take into account the target altitude information,which makes the calculation of the attitude angle of the target at high altitudes not accurate enough. An improved method of satellite access information calculation based on target altitude information is proposed in this paper.When constructing the space calculation model of satellite and target,this method considers the target altitude information,and then calculates the more accurate observation attitude angle,and makes the satellite after the planning to shoot accurately to the target position. Experimental results show that the algorithm reduces the systematic error and improves the accuracy of satellite observation.