IGS精密星历和钟差的算法比较研究  

Comparative Study on the Algorithm for IGS Precise Ephemeris and Clock Bias

作　　者：张养安[1] 李俊锋[2] 薛兆元[3] 李飞[1] ZHANG Yangan;LI Junfeng;XUE Zhaoyuan;LI Fei(Yangling Vocational & Technical College, Yangling 712100, China;Northwest Employee Training Center Of Surveying And Mapping, Xi'an 710054, China;The 2nd Land Surveying Team In State Bureau Of Surveying And Mapping, Xi'an 710054, China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]西北测绘职工培训中心,陕西西安710054 [3]国家测绘地理信息局第二地形测量队,陕西西安710054

出　　处：《地理信息世界》2016年第4期45-49,共5页Geomatics World

基　　金：国家自然科学基金项目(41201418)资助

摘　　要：通过编程对IGS精密星历和钟差的Lagrange插值、Neville插值、线性插值、多项式拟合算法等进行分析。结果表明:对于精密星历,插值算法的精度较相同阶次的拟合算法差,在拟合与插值时,选择最佳的阶数,其精度可达到毫米级;对于钟差,采用线性插值算法更为简单有效。This article analyzed the IGS precise ephemeris and clock error by Lagrange interpolation, Nevilleinterpolation, linear interpolation and polynomial fitting method . The results showed that: for the precise ephemeris,the same order of accuracy of fitting method was better than the interpolation algorithm; when the best order of theinterpolation and fitting algorithms were chosen , the precision could reach millimeter; the linear interpolation algorithmwas more simple and effective in clock error.

关 键 词：IGS 精密星历 钟差 插值 多项式拟合 

分 类 号：P228.4[天文地球—大地测量学与测量工程]