jgg     2015 35 (2):  190-193    ISSN: 0412-1961  CN: 21-1139/TG The High\|Rate Single Epoch GPS Double Difference Solution and Its  Accuracy Analysis 1 Department of Surveying Engineering, Changsha University of Science & Technology, 960 South\|Wanjiali Road, Changsha 410004, China Received: 2014-03-05  Revised: null  Online: 2015-04-15 Supporting info