GPS纯几何法在低轨卫星定轨中的应用

在近地低轨卫星上安装GPS接收机,并同时能捕获到四颗GPS卫星的话,我们就可以直接利用GPS观测值来组成观测方程,解算被求卫星的轨道位置。但由于GPS卫星是为地面上的用户设计的,其主要是满足地面用户的导航定位要求,再加上近地卫星的高动态性、高速度性,有时还不能同时捕获到四颗GPS卫星,这都给近地卫星的定轨带来了不确定的因素。本文主要对这一想法进行了试验,并分析了定轨的精度。

Application of the Pure Geometric Method of GPS for Orientating Orbit of the Low- orbit Satellite

If a GPS receiver is put on a low orbit satellite, we can use its observed value to calculate the coordinates of low orbit satellite as long as four or more GPS satellites can be observed.Howerer,as GPS satellite is designed for those users who are on the earth,and the low orbit satellite is highly dynamic and high-speed,sometimes less than four satellites could be observed.This paper took a test to apply pure geometric method of GPS to position the low orbit satellite.The precision of this method was also presented.