北斗三类卫星精密星历内插方法分析比较  

Three Kinds of Compass Satellite Precise Ephemeris Interpolation Method Analysis Comparative

作　　者：汪威[1] 陈明剑[1] 闫建巧 尹子明[1] 刘天恒 

机构地区：[1]信息工程大学导航与空天目标工程学院,郑州450001

出　　处：《全球定位系统》2016年第2期60-65,共6页Gnss World of China

基　　金：装备科研基金项目(编号:9140A24011314JB52001)

摘　　要：全球连续监测评估(iGMAS)分析中心能够提供GPS/BDS/GLONASS三系统卫星精密星历、精密钟差、电离层与对流层等产品,在使用北斗卫星进行高精度定位过程中必须对北斗精密星历进行内插。由于我国北斗卫星导航系统(BDS)包含不同轨道的卫星,因此,本文选取iGMAS分析中心精密星历,采用拉格朗日多项式内插和切比雪夫多项式拟合两种方法分别进行北斗GEO/IGSO/MEO三类卫星三维坐标内插实验,分析两种插值方法对不同轨道卫星插值误差与多项式的阶数之间的关系。计算结果表明,两种算法适合北斗不同轨道卫星内插,并且不同轨道卫星达到最佳插值精度所取的阶数不同。The global continuous monitoring and assessment iGMAS analysis center can provide GPS/BDS/GLONASS three system satellite precise ephemeris and precision clock error,ionosphere and troposphere products and so on.High precision positioning process must be carried out on the precise ephemeris interpolation using compass satellite,Because of our country＇s Beidou satellite navigation system（BDS）contains different orbits of the satellite,therefore,This paper selects the iGMAS Analysis Center precise ephemeris,Using Lagrange polynomial interpolation and Chebyshev polynomial fitting two methods respectively Beidou GEO/IGSO/MEO three kinds of satellite Three dimensional coordinate interpolation experiments,Two interpolation methods are analyzed to analyze the relationship between the interpolation errors of different orbit satellites and the order of polynomial.and draws some conclusions.The calculation results show that the two algorithms are suitable for the interpolation of different orbit satellites,and the order of the different orbit satellites to achieve the best interpolation accuracy is different.

关 键 词：iGMAS 北斗精密星历 拉格朗日插值 切比雪夫多项式拟合 

分 类 号：P228.4[天文地球—大地测量学与测量工程]