GPS网共模误差的空间响应分析

Spatial Response Analysis for GPS Network CME

对共模误差的空间变化进行分析。以美国南加州及周边区域的GPS台站网中3个站台为中心,通过划分9个不同的尺度空间,采用基于主成分分析(PCA)的空间滤波方法,对每个空间尺度GPS坐标序列共模误差进行提取,探讨不同空间尺度下GPS网共模误差的空间响应特性,为子区域的划分提供相应的理论基础。

In GPS regional network coordinate time series,common mode errors（CME）are widespread.In order to extract CME,a sub-region is divided to get them superimposed and filtered.However,there is no principle to rely on for dividing sub-regions.According to the CME mentioned above,regarding three stations in southern California as centers,we divide the space into nine different spaces within different scales,carrying out the PCA space filtering method,to get the CME in each space scale.After analyzing and comparing the CME in each space scale,we can get the spatial response characteristics in CME,which provides a principle for the dividing sub-regions in the scale field.