Masayoshi Takada¹, Kanako Seki², Yasunobu Ogawa³, Kunihiro Keika², Satoshi Kasahara⁴, Shoichiro Yokota⁴, Tomoaki Hori⁵, Kazushi Asamura⁴, Yoshizumi Miyoshi⁶ and Iku Shinohara⁷, (1)University of Tokyo, Department of Earth and Planetary Science, Bunkyo-ku, Japan, (2)The University of Tokyo, Tokyo, Japan, (3)NIPR National Institute of Polar Research, Tokyo, Japan, (4)ISAS/JAXA, Sagamihara, Japan, (5)Nagoya Univ. STE lab., Nagoya, Aichi, Japan, (6)Nagoya University, ISEE, Nagoya, Japan, (7)JAXA, ISAS, Sagamihara Kanagawa, Japan