星历精度对GPS单点定位的影响

The Influences of Ephemerises Accuracy to the GPS Point Positioning

探讨了GPS单点定位技术的原理、方法及数据处理中的一些关键技术,分析了广播星历和IGS提供的精密星历(IGR、IGU和IGF)对单点定位精度的影响,通过实验数据分析,得出在准实时的高精度解算中,可以利用快速星历代替最终星历进行解算。

This article studies the principle of GPS single point positioning,method and some key techniques in data processing.Then,the influences of broadcast ephemeris and precise ephemeris（IGR、IGU and IGF） provided currently by international GNSS service to single point positioning are analyzed.Through experimental data analysis,we can draw a conclusion that the rapid ephemeris can replace the final ephemeris in quasi-real-time high precision solution.