1. Department of Geophysics Graduate School of Science Tohoku University Sendai Japan
2. Max Planck Institute for Solar System Research Göttingen Germany
3. LPAP STAR Institute Université de Liège Liège Belgium
4. Royal Belgian Institute for Space Aeronomy BIRA‐IASB Brussels Belgium
5. Faculty of Science Kyoto Sangyo University Kyoto Japan
6. Planetary Plasma and Atmospheric Research Center Graduate School of Sciences Tohoku University Sendai Japan