jgg     2015 35 (6):  1001-1006    ISSN: 0412-1961  CN: 21-1139/TG Noise Model Establishment and Analysis of CORS Sites  Coordinates Time Series 1 uzhou Industrial Park Surveying, Mapping and Geoinformation Co., Ltd., 101 Mid-Suhong Road, Suzhou 215027, China 2 hangzhou Surveying and Mapping Institute, 503 Mid-Jinling Road, Changzhou 213002, China 3 epartment of Geodesy and Geomatics, Hohai University, 1 Xikang Road, Nanjing 210098, China Received: 2014-08-12  Revised: null  Online: 2015-12-01 Supporting info