一种载波相位残差的精密卫星钟差插值方法  

Interpolation approach for satellite clock corrections based on carrier-phase residuals

作　　者：潘林[1] 蔡昌盛[1] 

机构地区：[1]中南大学测绘与遥感科学系,长沙410083

出　　处：《测绘科学》2015年第4期34-37,共4页Science of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41004011);湖南省教育厅资助科研项目(13K007);中南大学教师研究基金项目(2013JSJJ004)

摘　　要：该文针对传统的精密卫星钟差插值方法没有考虑精密单点定位技术解算数据特点的不足,提出了一种基于载波相位观测值残差的精密卫星钟差插值方法。在精密单点定位中,卫星钟误差将部分体现在载波相位观测值残差中,基于此,考虑将载波相位残差的变化趋势引入到插值的过程中,达到提高插值精度的目的。利用IGS分析中心提供的精密卫星钟差数据进行分析,结果表明:新方法的插值精度为0.2ns^0.7ns;和线性插值、样条插值、Hermite插值、多项式拟合和Lagrange插值等5种传统的插值方法相比,新方法的插值结果在最大误差、平均误差、均方根误差方面均有显著改善,其中均方根误差相比5种传统方法的平均改善率最大达到了37%。In view of the shortcomings that the traditional interpolation approaches for satellite clock corrections do not consider the characteristics of precise point positioning（PPP）technology in data processing at present,a new interpolation approach based on carrier-phase residuals of precise satellite clock corrections was proposed.The errors of satellite clock corrections could be partly propagated to the carrierphase residuals.Based on this,the trends of carrier-phase residuals were introduced into the interpolation process to achieve the purpose of improving accuracy.The analyzing results indicated that the accuracy of the new interpolation approach was up to 0.2ns^0.7ns.Compared with the traditional methods including linear interpolation,spline interpolation,Hermite interpolation,polynomial fitting and Lagrange interpolation,the maximum error,mean error and root mean square（RMS）error using the new interpolation approach were significantly improved.The average improvement rate of RMS with respect to the five traditional methods reached 37% at most.

关 键 词：载波相位残差 精密卫星钟差 插值 精密单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程]