*能勢 正仁¹、桂華 邦裕²、Kletzing Craig³、Spence Harlan⁴、Smith Charles⁴、MacDowall Robert⁵、Reeves Geoffrey^6,7、Larsen Brian^6,7、Mitchell Donald⁸ (1.京都大学大学院理学研究科、2.名古屋大学宇宙地球環境研究所、3.Department of Physics and Astronomy, University of Iowa、4.Institute for the Study of Earth, Oceans and Space, University of New Hampshire、5.Solar System Exploration Division, Goddard Space Flight Center、6.Space Sciences and Applications Group, Los Alamos National Laboratory、7.Space Sciences Division, The New Mexico Consortium、8.Applied Physics Laboratory, Johns Hopkins University)