动态GPS精密单点定位三种星历精度差异分析

发布时间：2018-11-15 16:53

【摘要】：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。
[Abstract]:Aiming at the problem of positioning accuracy of different ephemeris in traditional dynamic GPS, the mathematical equation of ionospheric model is given, and the ionospheric delay, tropospheric delay and multipath effect are corrected. Based on the relativistic effect and the error of antenna phase center deviation the extended Kalman filter is used to calculate the receiver coordinates at each epoch. Three different ephemeris were calculated by KPPP, with Rapid,Final and RTS. The results of three different ephemeris were compared. The comparative experiments show that the deviation between the KPPP results calculated by Rapid ephemeris and that of Final ephemeris is very small and within 2cm, so Rapid ephemeris can be used instead of Final ephemeris in the engineering application of dynamic GPS which requires higher time-efficiency. The deviation between the calculated results of RTS ephemeris and that of Final ephemeris is 1.3 m.The accuracy of using RTS ephemeris is lower than that of Final,Rapid ephemeris, but it has obvious advantages of real-time positioning.
【作者单位】：井冈山大学电子与信息工程学院;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;南昌大学马克思主义学院;
【基金】：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)
【分类号】：P228.4

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