利用雷达高度计及星敏感器的多处理器卫星导航

鉴于当前单一处理器导航计算机结构给导航算法带来的约束及并行多处理器技术的日益成熟，提议卫星导航采用两个处理器并行的计算机结构，将卫星自主导航工作中轨道状态估计和状态预报分外在不同的处理器上处理。依据这一分工思路，提出近地海洋卫星利用雷达高度计及星敏感器实现自主导航的方法，并给出一个简单的导航模型及导航算法。通过计算机仿真检验了利用雷达高度计及星敏感器为近地海洋卫星提供导航的可行性，也验证了导航结构的适用性。

Autonomous Navigation Using Radar Altimeter and Star Sensor Based on Parallel Navigation Computer

This paper proposes a new autonomous satellite navigation method on the basis of a parallel multi-processor navigation computer. As is well known, the performances of many current orbit determination and navigation methods are greatly limited by the capabilities of the on-board single-processor navigation computers. The development of the parallel computer technology makes it passible for a satellite to use two parallel processors to respectively estimate and propagate its orbit at the same time. In the new satellite navigation method, a combination of radar altimeter and star sensor is required. The simulation results show that the combination can autonomously determine the orbit of an mean-observation satellite, and also show the validity of the parallel multi-processor navigation computer which is applied to orbit determination and navigation.