Abstract:Focusing on the coordinate time series captured from 7 Japanese IGS reference stations in the three years before and after the March 11, 2011, east Japan earthquake, the common mode error of this region is calculated. Furthermore, the optimal noise model of each station components before and after the earthquake are determined using CATS software, so the noise characteristics can be analyzed based on the common mode error of the east Japan earthquake. The conclusion is drawn that obvious periodicity shows in the common mode error in N, E, U direction, and the mean value in N, U direction increases 2.1 times and 1.5 times due to the earthquake. Using the spatial filtering method to eliminate the common mode error, the flicker noise in the horizontal direction is obviously weakened. Each component of IGS reference stations presents diverse noise characteristics, with no obvious regularity. The influence of the earthquake on reference station coordinate time series noise is mainly on BP, FN and RW characteristics, and the closer to the epicenter of the earthquake, the more obvious the effect will be.
YU Xinping,CHENG Yingyan,ZHU Wenjuan et al. Influence of Earthquakes on the Noise Characteristics of IGS Reference Station Coordinate Time Series[J]. jgg, 2017, 37(10): 1059-1064.