jgg     2010 30 (2):  63-66    ISSN: 0412-1961  CN: 21-1139/TG OPTIMAL DESIGN OF OBSERVATION PROGRAMSFOR SATELLITE POSITIONING TECHNOLOGY Guo Yingqi 1) ; Ma Junhai 1) ; Yi Xiaodong 2) ; and Si Haiyan 1) 1)Dept. of Surveying and Mapping Engineering, Heilongjiang Institute of Technology, Harbin 1500502)School of Civil Engineering, Dalian University of Technology, Dalian 116024 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null