顾及共模误差的四川连续GPS基准站坐标时间序列噪声分析  

Noise Analysis of Coordinate Time Series of Sichuan GPS Reference Stations with Common Mode Error

作　　者：刘宗强[1,2] 党亚民[1,2] 杨强[1] 张光茹[1] 王健[1,2] 韩德强[1] LIU Zongqiang;DANG Yamin;YANG Qiang;ZHANG Guangru;WANG Jian;HAN Deqiang(Chinese Academy of Surveying and Mapping, 28 West-Lianhuachi Road,Beijing 100830,China;College of Geomatics, Shandong University of Science and Technology, 579 Qianwangang Road,Qingdao 266590,China)

机构地区：[1]中国测绘科学研究院,北京市莲花池西路28号100830 [2]山东科技大学测绘科学与工程学院,青岛市前湾港路579号266003

出　　处：《大地测量与地球动力学》2018年第5期510-515,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41474011)~~

摘　　要：使用GAMIT/GLOBK软件处理四川省内23个连续GPS基准站2010~2015年数据,获取各测站的坐标时间序列,然后利用堆栈法对其进行空间滤波以剔除共模误差,通过谱指数计算和最大似然估计法(MLE)对滤波后的GPS站坐标时间序列进行噪声分析。结果表明,四川连续GPS基准站坐标时间序列N、U方向最优噪声模型为WN+FN,E方向最优噪声模型为WN+FN+RWN;空间滤波可以降低闪烁噪声,同时使一些测站显现出随机漫步噪声;根据GPS站坐标时间序列估计基准站速度时,应当顾及有色噪声的影响。In this paper, GAMIT/GLOBK software is used to deal with the data of 23 consecutive GPS reference stations in Sichuan province during 2010--2015. The coordinate time series of each station is obtained. The stacking method is used for spatial filtering to eliminate the common mode error, and the noise of the filtered GPS station coordinate time series is analyzed by means of spectral index cal- culation and maximum likelihood estimation. The results show that the optimal noise model of N and U in the coordinate time series of Sichuan GPS fiducial station is WN ＋FN, and the optimal noise model in E direction is WN＋FN＋RWN; spatial filtering can reduce flicker noise, and at the same time, some stations show random walk noise; the effect of colored noise should be taken into account when the reference station speed is estimated according to the GPS coordinate time series.

关 键 词：四川连续GPS基准站 时间序列 共模误差 速度场 

分 类 号：P228[天文地球—大地测量学与测量工程]