GPS精密单点定位中对流层延迟处理方法研究  

The method of processing tropospheric delay in GPS precise point positioning

作　　者：李凯锋[1] 欧阳永忠[1] 任来平[1] 刘传勇[1] 

机构地区：[1]海军海洋测绘研究所,天津300061

出　　处：《测绘科学》2009年第4期93-94,共2页Science of Surveying and Mapping

基　　金：国家863课题(2006AA06A202)

摘　　要：本文首先介绍了GPS精密单点定位技术,采用宽巷组合的方法得到观测方程。然后对精密定位中的误差改正作了简述,主要讨论了处理对流层延迟的Saastamoinen模型和Niell映射函数。提出用扩展卡尔曼滤波参数估计方法来处理对流层延迟,通过实例用Saastamoinen模型、Saastamoinen模型加Niell映射函数和扩展卡尔曼滤波参数估计三种方法对对流层延迟进行改正,结果表明该方法优于Saastamoinen模型。Firstly, the technology of GPS precise point positioning was introdced and an observation equation with the method of Widelane combination was obtained. Then error correction was depicted, the Saastamoinen model and Niell mapping function were discussed. A method to process tropospheric delay with Extended Kalman Filter was proposed. By using Saastamoinen, the combination of Saastamoinen with Niell and EKF, the tropospheric delay was corrected. The experimental result shows that this method is more effective than Saastamoinen model.

关 键 词：精密单点定位 对流层延迟 扩展卡尔曼滤波 

分 类 号：P228[天文地球—大地测量学与测量工程]