ANALYSIS ON TIME SERIES OF TWO CORS STATIONS’ HEIGHT BASED ON EMD
Zhang Hengjing 1,2) ; and Cheng Pengfei 2)
1)School of Geomatics of Liaoning Technical University，Fuxin 123000;2)Chinese Academy of Surveying & Mapping，Beijing 100830
Abstract The timefrequency analysis method base on EMD(empirical mode decomposition) for GPS height time series is put forward.Taking two national CORS stations’ GPS height time series as an example, each intrinsic mode function is decomposed and the contribution rate of variance is also calculated. The problem of identifying father distinguishing the periodical signals and the trend is emphasizerd. The results indicate that it is only meaningful to distinguish the periodical and the trend signal on certain length of time series’ section. The trend based on EMD or EEMD presents with large curvature while the traditional form of periodical fitting function only linear form.
Key words ：
empirical mode decomposition(EMD)
intrinsic mode function
trend
GPS height time series
contribution rate of variance
Received: 01 January 1900
Corresponding Authors:
Zhang Hengjing
Cite this article:
Zhang Hengjing, and Cheng Pengfei . ANALYSIS ON TIME SERIES OF TWO CORS STATIONS’ HEIGHT BASED ON EMD[J]. , 2012, 32(3): 129-134.
Zhang Hengjing, and Cheng Pengfei . ANALYSIS ON TIME SERIES OF TWO CORS STATIONS’ HEIGHT BASED ON EMD[J]. jgg, 2012, 32(3): 129-134.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2012/V32/I3/129
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