Denoising Analysis on GNSS Position Time Series Based on VMD
The time series of GNSS reference station superimposed complex noise and it is difficult to effectively denoise,this paper u-ses VMD to denoise the time series of GNSS reference stations in Shanxi province.First,we search for the optimal solution of varia-tional modes and obtain a series of modal components;second,we eliminate the high-frequency signal in modal components,carry out the superposition and reconstruction of modal functions and obtain the denoised time series of station positions;finally,RMSE index is used to evaluate the denoising effect.The result show that the VMD method can effectively separate noise signals from series,re-duce the impact of non-structural information and improve the accuracy of GNSS reference station time series.It provides reliable and high-accuracy crustal movement related information for analysis and prediction personnel,and better service for earthquake predic-tion.
variational modal decompositionGNSS time seriesnoise
NETL
NSTL
万方数据
