武汉市CORS坐标时间序列中共模误差分析

Analysis of Common Mode Error in Wuhan CORS Coordinate Time Series

基于武汉市CORS近十年连续观测的单日解坐标时间序列进行数学建模,获取了残差坐标时间序列数据,分析了测站坐标时间序列的周期性变化。为了有效地提取武汉CORS基准站坐标时间序列中的共模误差,采用空间叠加滤波算法以及相关系数叠加滤波算法对其进行空间滤波,并对比分析2种方法的滤波效果。结果表明,武汉CORS基准站单日解坐标时间序列之间存在显著的相关性,2种方法均能有效提取武汉区域共模误差,相关系数叠加滤波算法的滤波效果略优于空间叠加滤波算法。

Mathematical modeling was performed based on the Wuhan CORS single-day solution coordinate time series in the past ten years.The residual coordinate time series data was obtained, and the periodic changes of the station coordinate time series were analyzed. The results show that there is a significant correlation between the single-day solution coordinate time series of the Wuhan CORS reference station, and regional stacking filtering and correlation weighted stacking filtering can effectively extract common mode error in the Wuhan CORS reference station coordinate time series.