Kunihiro Keika¹, Satoshi Kasahara¹, Shoichiro Yokota², Masahiro Hoshino¹, Kanako Seki¹, Takanobu Amano¹, Lynn M Kistler³, Masahito Nose⁴, Yoshizumi Miyoshi⁴, Tomoaki Hori⁴ and Iku Shinohara⁵, (1)The University of Tokyo, Tokyo, Japan, (2)Osaka University, Osaka, Japan, (3)Univ New Hampshire, Durham, NH, United States, (4)Nagoya University, ISEE, Nagoya, Japan, (5)JAXA, ISAS, Sagamihara Kanagawa, Japan