jgg     2013 33 (4):  52-55    ISSN: 0412-1961  CN: 21-1139/TG FAST CALCULATION OF EARTH’S DISTURBING GRAVITY THROUGH  POLYNOMIAL FITTING 1) Faculty of Geomatics, East China Institute of Technology, Fuzhou 344000 2) School of Geodesy and Geomatics, Wuhan University, Wuhan 430079 3) Institute of Earthquake Science, China Earthquake Administration, Beijing 100036 Received: 2012-12-03  Revised: null  Online: 2013-08-16 Supporting info