基于雷达高度计-星敏感器的卫星自主导航精度分析

Accuracy analysis on satellite autonomous navigation using radar altimeter and attitude sensors

考虑到采用多个雷达高度计进行卫星自主定位的不足,提出采用单个雷达高度计,结合星敏感器提供的测量信息,构成雷达高度计—星敏感器的卫星组合自主导航系统。通过大量的仿真实验,分析了地形起伏、可见导航星数目、星敏感器精度、地平仪精度等因素对定位精度的影响,并总结其变化规律,对提高卫星自主定位精度有重要的借鉴意义。

A new autonomous satellite navigation method using single radar altimeter and attitude sensors is proposed. Through the massive simulations experiment, the effect of terrain fluctuation, the number of sighting stars, the precision of star sensor, the precision of horizon sensor on the error determination is analyzed, simultaneously some rules are summarized. It has the important significance to increases the navigation accuracy.