jgg     2013 33 (1):  25-28    ISSN: 0412-1961  CN: 21-1139/TG ANALYSIS OF ABSOLUTE GRAVITY DETERMINATION AT FIDUCIAL STATIONS NEAR OCEAN Zhang Hongwei 1,2) ; Xiao Fan 1,2) ;He Zhitang 3) ;Wang Yingjian 1,2) ;Zhao Dongming 2) ;and Xia Chen 1) 1)61365 Troops of PLA，Tianjin 300140;2)Surveying and Mapping Institute of Information Engineering University, Zhengzhou 450052;3)Bureau of Surveying and Mapping of Shanxi Province, Xi’an 710054 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null