[1] School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
[2] China Zhongjie Major Bridge Reconnaissance and Design Institute Co. Ltd., 34 Hanyang Avenue, Wuhan 430050, China
[3] Department of Engineering Physics, Tsinghua University, Qinghua Yuan Haidian District, Beijing 100084, China