Xiaochun Wang¹, Zhijin Li², Yuchan Yi³, C.K. Shum³ and Joel T Johnson⁴, (1)University of California Los Angeles, Los Angeles, CA, United States, (2)JPL, Pasadena, CA, United States, (3)The Ohio State University, Division of Geodetic Science, School of Earth Sciences, Columbus, OH, United States, (4)Ohio State University Main Campus, Department of Electrical and Computer Enginneering, Columbus, OH, United States