1. Department of Earth and Planetary ScienceThe University of Tokyo Bunkyo Japan
2. Department of Complexity Science and EngineeringThe University of Tokyo Bunkyo Japan
3. Planetary Plasma and Atmospheric Research CenterTohoku University Sendai Japan
4. Frontier Research Institute for Interdisciplinary SciencesTohoku University Sendai Japan
5. Laboratory for Atmospheric and Space PhysicsUniversity of Colorado Boulder Boulder CO USA
6. Institute of Space and Astronautical Science (ISAS)Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan