*Dimitar Ouzounov¹、Sergey Pulinets²、Katsumi Hattori³、Patrick Taylor⁴ (1.Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA、2.Space Research Inst., Russian Acad. of Sci, 84/32 Profsoyuznaya , Moscow, 117997, Russia、3.Department of Earth Sciences, Chiba University, Inage, Chiba, 263-8522, Japan、4.NASA GSFC, Geodesy and Geophysics Laboratory, Greenbelt, MD 20771, USA)