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.
作者
张养安
李俊锋
薛兆元
李飞
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)
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
关键词
IGS
精密星历
钟差
插值
多项式拟合
IGS
precise ephemeris
clock error
interpolation
polynomial fitting
