GPS卫星广播星历轨道误差突变性分析  

Analysis on Unexpected Orbit Errors of GPS Satellite Broadcasting Ephemeris

作　　者：杨学锋[1,2] 程鹏飞[1] 方爱平[1] 齐维君[1] 

机构地区：[1]中国测绘科学研究院,北京100039 [2]辽宁工程技术大学,辽宁阜新123000

出　　处：《全球定位系统》2008年第4期34-37,48,共5页Gnss World of China

摘　　要：针对GPS卫星播发的广播星历存在误差突变的问题进行了有关研究。利用切比雪夫多项式,分别以不同的拟合时段计算卫星轨道坐标,然后分别与对应历元的IGS精密星历所提供的GPS卫星的坐标进行比较,发现了某些GPS卫星广播星历轨道误差变化的规律。这对如何削弱广播星历的轨道误差,提高导航与定位精度是十分有益的。This paper focuses on the problem of unexpected orbital errors from the broadcast ephemeris of GPS satellite. Chehyshev Polynomial is used to calculate coordinates of satellites respectively with different fitting time interval. Comparison is made with IGS precise ephemeris which reveals unexpected orbit errors derived from GPS broadcast ephemeris. This is of significance for eliminating GPS orbit errors in broadcast ephemeris and for improving navigation and positioning accuracies.

关 键 词：GPS 广播星历 精密星历 切比雪夫多项式 

分 类 号：P207[天文地球—测绘科学与技术]