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.
