GPS时间序列共模误差提取方法及对比分析  

Extraction method and comparative analysis of GPS time series common mode error

作　　者：孔祥瑞[1] 李梦莹[1] 翟丽娜[1] 王喜龙[1] Kong Xiangrui;Li Mengying;Zhai Lina;Wang Xilong(Liaoning Earthquake Agency,Shenyang 110034,China)

机构地区：[1]辽宁省地震局,沈阳110034

出　　处：《工程勘察》2024年第9期77-82,共6页Geotechnical Investigation & Surveying

基　　金：中国地震局地震科技星火计划(XH23009YA);辽宁省地震局科技项目(2022029)。

摘　　要：区域GPS网中,各个测站坐标时间序列会存在共模误差(CME),该误差会对GPS测站坐标精度产生一定影响,因此去除共模误差对提高站点观测精度具有重要意义。本文在叠加滤波方法的基础上,以各个GPS站点相关性大小为权重进行加权,利用相关加权滤波方法对辽宁及周边省份GPS观测数据进行处理分析,提取共模误差向量,并与叠加滤波的结果进行对比和分析。结果表明,两者均能在一定程度上提取共模误差向量,相关加权叠加滤波法比叠加滤波法具有更好的适用性,均方根提升更为明显,能够更好地提取共模误差。There is a common mode error(CME) in the coordinate time series of each station in the regional GPS network,which has a certain influence on the accuracy of GPS station coordinates,so it is important to remove the common mode error to improve the accuracy of station observation.In this paper,based on the superposition filtering method,the correlation weighted filtering method is used to process and analyze the GPS observation data in Liaoning and surrounding provinces,extract the common mode error vector,and compare and analyze the results with the superposition filtering method.The results show that both can extract the common-mode error vector to a certain extent,and the correlation-weighted superposition filtering method has better applicability than the superposition filtering method,and the root-mean-square improvement is more obvious,which can better extract the common-mode error.

关 键 词：GPS坐标时间序列 共模误差 相关加权叠加滤波 

分 类 号：P228[天文地球—大地测量学与测量工程]