jgg     2009 29 (5):  72-75    ISSN: 0412-1961  CN: 21-1139/TG IMPACT ON ABSOLUTE GRAVITY OBSERVATION AT CHANGCHUN FIDUCIAL OF JINGYUETAN RESERVOIR IMPOUNDMENT Wang Xiaobing1，2） ;Zhang Weimin1）; and Zhong Min1） 1）Key Laboratory of Dynamic Geodesy,Institute of Geodesy and Geophysics，CAS，Wuhan 430077 2）Graduate School of the Chinese Academy of Sciences，Beijing 100049 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null