RESEARCH ON NOISE CHARACTERISTICS OF TIME SERIES\=[JZ] OF CORS SITES COORDINATES IN SHANXI REGION
Zhang Yanfen 1) ; Bi Gang 1) ; Chen Hua 2) ; and Feng Yantong 3)
1)Institute of Surveying and Mapping Engineering of Shanxi Province,Taiyuan 030002;2)School of Geodesy and Geomatics，Wuhan University，Wuhan 430079;3)Institute of Land Surveying and Mapping of Shandong Province,Jinan 250102
Abstract：The data of Shanxi region CORS nearly two years are processed and then Shanxi CORS sites coordinates time series can be abtained subsequently.For the work,the CATS software is used to analyzed the noise characteristics of sites coordinates time series with Maximum Likelihood Estimation(MLE) and following useful conclusions are drawn. Firstly，there are not only white noise but also colored noise in CORS coordinates time series.Secondly，the noise model in the directions N, E, U of CORS coordinates time series is not identical. In the N, E direction,the “WN + FN” noise model is oplimum and the “WN + FN + RWN” noise model in the U direction. Finally, when CORS coordinates time series are used to fit velocity, not only white noise but also colored noise should be considered for more correct relocity valuations.
Zhang Yanfen ,Bi Gang ,Chen Hua et al. RESEARCH ON NOISE CHARACTERISTICS OF TIME SERIES\=[JZ] OF CORS SITES COORDINATES IN SHANXI REGION[J]. jgg, 2012, 32(4): 61-66.
