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。"/>
Noise Analysis of Coordinate Time Series of Sichuan GPS Reference Stations with Common Mode Error
Abstract 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 calculation 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.
LIU Zongqiang,DANG Yamin,YANG Qiang et al. Noise Analysis of Coordinate Time Series of Sichuan GPS Reference Stations with Common Mode Error[J]. jgg, 2018, 38(5): 510-515.
LIU Zongqiang,DANG Yamin,YANG Qiang et al. Noise Analysis of Coordinate Time Series of Sichuan GPS Reference Stations with Common Mode Error[J]. jgg, 2018, 38(5): 510-515.
