jgg     2010 30 (4):  83-91    ISSN: 0412-1961  CN: 21-1139/TG PROGRESS AND PRESENT STATUS OF RESEARCH ON EARTH’S GRAVITATIONAL FIELD MODELS Zheng Wei 1,2) ; Xu Houze 1) ; Zhong Min 1) ; Yun Meijuan 3) ; Peng Bibo 1) ; and Zhou Xuhua 4) 1) Key Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, CAS, Wuhan 430077 2) Disaster Prevention Research Institute, Kyoto University, Uji, Kyoto 611-0011, Japan 3) Department of Applied Physics, Wuhan University of Science and Technology, Wuhan 430081 4) Shanghai Astronomical Observatory, CAS, Shanghai 200030 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null