利用条件平差实现导航星座自主守时方法

针对导航星座自主导航系统的重要组成部分———自主守时系统,提出了一种简便易行的新算法:根据星间测距数据,采用条件平差进行自主守时计算;并且介绍了此方法基本原理和实现思路。自主守时仿真计算表明,此方法守时同步误差不累积,距离测量误差0.1m时,时间同步误差均方根小于0.4m。

Auto-Timing of Satellite Navigation System Using Conditional Estimate

Capability of the active satellite navigation system is to estimate clock and(position) error autonomously.The capability is called as autonomous navigation.The algorithm of estimating the each satellite clock error was focused.Generally,in order to autonomous(navigating),each satellite makes pseudorange measurements to other visible satellites.Then these measurements are cross-linked to every satellites,so each can calculate every clock error.A new method of conditional estimating was introduced to calculate the clock error.The principle and(approach) of the method was discussed in detail.The synchronization error which was the difference between each estimated error was less than 0.4m(RMS).