Chika Umegaki, Tokyo, Japan, Takanobu Amano, The University of Tokyo, Bunkyo-ku, Japan, Naritoshi Kitamura, The University of Tokyo, Tokyo, Japan, Olivier Le Contel, Laboratoire de Physique des Plasmas (UMR7648), CNRS/Ecole Polytechnique/UPMC/Univ. Paris Sud/Obs. de Paris, Paris, France, Narges Ahmadi, University of Colorado at Boulder, LASP, Boulder, CO, United States and Barbara L Giles, NASA Goddard Space Flight Center, Greenbelt, MD, United States