To investigate the noise characteristics of the high-rate GPS coordinate time series, one-hour high-rate observations of eight CORS sites in the Sichuan basin from 8:00-9:00 Beijing time for three days, including the Lushan earthquake, are resolved and analyzed. The sidereal filtering and principle component analysis filtering are utilized to analyze and reduce the temporal and spatial noise separately; the power spectrum method is used to estimate the spectrum index. With the spectrum index from 1.6 to 2, we consider the high-rate coordinate time series are adjusted for white noise plus random walk noise characteristics. These results have important implications for the design of continuous GPS networks for crustal deformation and structural monitoring, and also for positioning and attitude determination of dynamic platforms.
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顾铁,李萌,严丽.高频GPS坐标时序的噪声特性分析[J].地震工程学报,2017,39(5):963-968. GU Tie, LI Meng, YAN Li. Noise Characteristics Analysis of the High-rate GPS Coordinate Time Series[J]. China Earthquake Engineering Journal,2017,39(5):963-968.