一种新的GPS精密星历插值方法  

A kind of New Interpolation Method on GPS Precision Ephemeris

作　　者：赵娜[1] 

机构地区：[1]河北省地矿局石家庄综合地质大队,河北石家庄050085

出　　处：《北京测绘》2018年第2期186-189,共4页Beijing Surveying and Mapping

摘　　要：基于Fourier级数,阐述了GPS精密星历滑动式内插方法,对精密星历变化特点进行了分析。针对传统各类插值方法对于精密星历外推精度较差并考虑卫星实际运动的特点,采用了一种非常规插值方法 Fourier级数插值,并运用实际算例,将新插值方法和拉格朗日插值精度进行对比,得到结果说明,新插值方法优势明显,能够提高外推精度一个数量级。Based on the Fourier series, the sliding interpolation method of GPS precise ephemeris ichange characteristics of precise ephemeris are analyzed. According to various traditional interpolation methods forprecise ephemeris extrapolation accuracy and considering the characteristics of satellite actual movemenconventional interpolation method of Fourier series interpolation, and the use of practical examples, comparing the new interpolation and Lagrange interpolation accuracy, obtained results show that the advantages of the new interpo-lation method can improve the accuracy of extrapolation is obvious, a the number of grade.

关 键 词：精密星历 多项式插值 周期函数 滑动式内插 FOURIER级数 

分 类 号：P228.4[天文地球—大地测量学与测量工程]