jgg     2015 35 (4):  702-706    ISSN: 0412-1961  CN: 21-1139/TG Iteration Method by Correcting Characteristic Values to  Ill-posed Total Least Squares Problem 1 Faculty of Geomatics, East China Institute of Technology,418 Guanglan Road, Nanchang 330013, China 2 Jiangxi Province Key Lab for Digital Land, 418 Guanglan Road, Nanchang 330013, China 3 Key Laboratory of Watershed Ecology and Geographical Environment Monitoring, NASMG， 418 Guanglan Road, Nanchang 330013, China Received: 2014-09-26  Revised: null  Online: 2015-07-29 Supporting info