1. Planetary Plasma and Atmospheric Research Center Tohoku University Sendai Miyagi Japan
2. Department of Complexity Science and Engineering University of Tokyo Kashiwa Chiba Japan
3. Frontier Research Institute for Interdisciplinary Sciences Tohoku University Sendai Miyagi Japan
4. Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Kanagawa Japan
5. Applied Physics Laboratory Johns Hopkins University Laurel MD USA
6. Laboratory of Atmospheric and Space Physics University of Colorado Boulder CO USA