jgg     2009 29 (4):  79-82    ISSN: 0412-1961  CN: 21-1139/TG 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 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null