jgg     2009 29 (5):  89-93    ISSN: 0412-1961  CN: 21-1139/TG MUTUAL VERIFICATION OF TWO METHODS ON EVALUATING ACCURACY OF GRACE EARTH’S GRAVITATIONAL FIELD Zheng Wei1，2）;Xu Houze1）;Zhong Min 1）;Yun Meijuan3）;Zhou Xuhua1）; and Peng Bibo1） 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 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null