jgg     2008 28 (3):  83-86    ISSN: 0412-1961  CN: 21-1139/TG REGULARIZATION COMBINED WITH ROUST ESTIMATIONAND ITS APPLICATION FOR GPS RAPID POSITIONING Chang Zhiqiao; Hao Jinming; Zhang Chengjun; and Cui Jianyong Institute of Surveying and Mapping, PLA University of Information Engineering, Zhengzhou 450052 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null