IGS精密星历文件的读取及内插方法研究

摘要

利用matlab软件编程实现了精密星历文件的读取及信息筛选。在GPS精密单点定位的过程中,需要比国际全球导航卫星系统服务（IGS）组织提供的15min更小的精密星历时间间隔的观测数据,介绍了拉格朗日和牛顿两种插值方法,对IGS精密星历进行了内插,并对插值的结果进行对比分析,得到了一些有益的结论。%This article had completed the read and information calendar of precise ephemeris file by using Matlab.In the process of PPP,it needs to observe data of precise ephemeris whose time interval is less than 15 min,so two methods of interpolation are introduced in the article： Lagrange and Newton.Insert in the precise ephemeris,and comparative analysis on the results of interpolation,so that we can get some beneficial conclusions.