jgg     2009 29 (6):  118-122    ISSN: 0412-1961  CN: 21-1139/TG RESEARCH ON ESTIMATION AND PREDICTION OF GPS SATELLITE CLOCK ERROR Huang Guanwen 1) ; Zhang Qin 1) ; and Wang Jigang 2) 1)College of Geology Engineering and Geomantic, Chang’an University, Xi’an 7100542)Graduate University of Chinese Academy of Sciences, Beijing 100039 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null