动态GPS精密单点定位三种星历精度差异分析Accuracy difference analysis of three kinds of ephemeris on dynamic GPS precise point positioning
罗文浪,付青,涂雅莉,龙满生,曾小荟
摘要(Abstract)：
针对传统的动态GPS中采用不同星历的定位精度问题,给出了无电离层模型数学方程,改正了电离层延迟、对流层延迟、多路径效应、相对论效应以及天线相位中心偏差等误差的影响,采用扩展Kalman滤波解算出每个历元时刻接收机坐标。采用Rapid、Final与RTS共3种不同星历产品计算KPPP,比较了3种不同星历解算结果。对比实验表明:使用Rapid星历计算KPPP结果与Final星历计算结果偏差很小,处于2cm之内,故在时效性要求较高的动态GPS工程应用中可以采用Rapid星历替代Final星历;而使用RTS星历计算结果与Final星历计算结果偏差1.3m,使用RTS星历定位精度低于Final、Rapid星历计算结果,但其具有实时定位的明显优势。
关键词(KeyWords)： 三种星历;动态GPS定位;精密单点定位;精度
基金项目(Foundation): 国家自然科学基金项目(11364023);; 江西省教育厅科学技术研究项目(GJJ13538,KJLD14063,KJLD20120357);吉市科计字[2016]4号3;; “流域生态与地理环境监测”国家测绘地理信息局重点实验室招标项目(WE2015013,WE2015002)
作者(Author): 罗文浪,付青,涂雅莉,龙满生,曾小荟
DOI: 10.16251/j.cnki.1009-2307.2017.09.006
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