两种地基GPS水汽含量计算方法的对比研究  

Research on Two Methods of Calculating Water Vapor Using Ground-Based GPS

作　　者：朱爽[1] 姚宜斌[1] 张瑞[1] 孔建[1] 

机构地区：[1]武汉大学测绘学院,湖北武汉430079

出　　处：《信息工程大学学报》2012年第2期247-251,256,共6页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(40774008)

摘　　要：首先在PPP模式的理论研究基础上分别用卡尔曼滤波法和两次差法进行天顶对流层延迟估计,利用IGS数据进行实验证实PPP模式下两种方法天顶对流层延迟估计都具有较高精度。同时,利用PPP程序和GAMIT软件进行实验,验证了基于PPP与双差法的解算结果在整体趋势上的一致性。另外还对比了有无远距离测站参与解算时的双差法的解算精度,并与PPP方法进行对比分析,验证了无远距离测站参与解算时的双差法精度较低。On the basis of PPP theory,zenith tropospheric delay was calculated by using Kalman filtering method and double-difference method respectively.Processing the data provided by IGS proved that the zenith tropospheric delay calculated by PPP mode in this two methods both have high precision.Then,same data were processed by PPP program and GAMIT.The result shows that the PPP and double-differencing have the same trend.Besides,the data without far-away station information were processed in double-differencing method.The comparison with PPP shows that without far-away station the double-differencing method has low precision.

关 键 词：PPP 卡尔曼滤波法 两次差法 双差法 天顶对流层延迟 可降水汽 

分 类 号：P228.4[天文地球—大地测量学与测量工程]