Ryoichi IMASU¹, Wataru TAKEUCHI², Ayako SEKIYAMA², Naoko SAITOH³, *Yutaka MATSUMI⁴, Masahiro KAWASAKI⁴, Sachiko HAYASHIDA⁵, Akiko ONO⁵ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.Institute of Industrial Science, The University of Tokyo, 3.Center for Environmental Remote Sensing, Chiba University, 4.Solar-Terrestrial Environment Laboratory, Nagoya University, 5.Nara Women's University)