DE-NOISING OF GPS OBSERVATIONS WITH WAVELET THRESHOLD METHOD
Wu Jizhong 1,2)
1)College of Civil Engineering,Nanjing University of Technology,Nanjing 2100092)Research Center of GNSS , Wuhan University,Wuhan 430079
Abstract Wavelet transform is usually used to reduce the high frequency noise of carrier phase GPS double differences observation. The computation outputs with soft thresholding and hard thresholding as well as several threshold selection rules are compared. The experiments indicate that ambiguity solutions become more reliable and the coordinates more precise after wavelet threshold denoising,while different threshold selection rules generate different results. In general, the soft thresholding with the universal threshold provides the best results
Key words ：
GPS
wavelet transform
ambiguity
baseline resolution
wavelet threshold denoising
Received: 01 January 1900
Corresponding Authors:
Wu Jizhong
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