jgg     2007 27 (2):  80-83    ISSN: 0412-1961  CN: 21-1139/TG COMPARATIVE ANALYSIS ON TWO METHODS FOR IGS PRECISE EPHEMERIS INTERPOLATION Zhang Shoujian 1) ;Li Jiancheng 1) ;Xing Lelin 2) ; and Hou Yanhui 3) 1)School of Geodesy and Geomatics, Wuhan University, Wuhan 4300792)Institute of Seismology,CEA,Wuhan\ 430071 3)Department of Mechanics, Southwest Jiaotong University, Chengdu 610031 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null