GPS与PS-DInSAR方法的大气延迟变化量解算与精度分析  

Analysis on solution and accuracy of atmospheric delay variation based on GPS and PS-DInSAR

作　　者：龙四春[1,2] 张兆龙[3] 胡艳冬 李黎[1,2] 张立亚[1,2] 

机构地区：[1]湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201 [2]湖南科技大学测量工程与形变监测研究所,湖南湘潭411201 [3]湖南科技大学能源学院,湖南湘潭411201

出　　处：《测绘科学》2014年第11期20-24,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金(41474014;41004002);大地测量与地球动力学国家重点实验室基金(SKLGED2014-5-3-E);桂科能基金(1207115-21);煤炭资源与环保湖南省重点实验室基金(E21221)

摘　　要：文章研究利用Kriging插值方法对天津地区11个连续运行GPS点网的大气延迟解算结果进行内插,得到区域连续GPS大气延迟变化分布。选择同一区域进行PS-DInSAR处理所得的残余相位主要由非线性形变相位、大气相位和噪声相位组成,尝试在时间域高通滤波和空间域低通滤波处理,得到与GPS同地域同时段的大气延迟变化分量。对所得两种大气延迟变化量进行对比分析,采用求差和均方根误差(Root Mean Square,RMS)进行统计检验,结果表明这两种方法得到的大气延迟变化分量基本一致,进一步集成可望得到更有效的监测结果。In the paper, Kriging interpolation was adopted to interpolate the discretely-distribmed at mospherie delay dataof the 11 continuous GPS points in Tianjin area, and the general continuous distribu- tion of atmospheric zenith delay variation was obtained. It held a character analysis on the irreducible phase obtained by means of PS-DInSAR, which mainly consists of non-linear deformation phase, atmospheric phase and noise phase. The obtained data were processed in high pass filtering in time dornain and low pass filtering in space domain, and then the atmospheric delay variation of the same area in the same time peri- od by GPS was obtained. The two atmospheric delay variations were compared, and their Root Mean Square errors and the absolute value of the differences between the two atmospheric delay variations were analyzed. The result showed that the tendency of atmospheric delay variations obtained by GPS and PS- DInSAR would basically agree with each other, their characteristics could be mutually complementa- ry. Thus further integration of the two may help get more reliable result.

关 键 词：PS DlnSAR GPS大气 大气延迟变化分量 滤波 对比分析 

分 类 号：P228[天文地球—大地测量学与测量工程]