Chao Ren received his B.S. degree in Surveying Engineering from Chang’an University, Xi’an, China, in 1998. He completed his Ph.D. degree in geodesy and survey engineering from the Institute of Geodesy and Geophysics, Chinese Academy of Science, Wuhan, China, in 2005. Now, he is a professor at Guilin University of Technology, Guilin, China. His main research interests are in modeling Global Navigation Satellite System interferometric reflectometry (GNSS-IR) and its applications in measuring surface soil moisture, snow depth. He has presided over Three National Natural Science Foundation Projects and Four Guangxi Natural Science Foundation Projects. He has published more than 80 academic papers in related fields, including more than 30 SCI and EI indexed papers.