jgg     2015 35 (1):  53-57    ISSN: 0412-1961  CN: 21-1139/TG Mass Change of the Antarctic Based on Tongji-GRACE01 Gravity Model College of Surveying and Geo-Informatics Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China Received: 2014-06-24  Revised: null  Online: 2015-02-06 Supporting info