*森 悠貴¹、関 華奈子¹、堺 正太朗¹、原 拓也²、David Brain³、James McFadden²、Jasper Halekas⁴、Gina DiBraccio⁵、Frank Eparvier³、Bruce Jakosky³ (1.東京大学大学院理学系研究科、2.Space Sciences Laboratory, University of California, Berkeley, CA, USA、3.Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, USA、4.Department of Physics and Astronomy, University of Iowa, Iowa City, IA, USA、5.NASA Goddard Space Flight Center, Greenbelt, MD, USA)