1. NASA Goddard Space Flight Center; Greenbelt Maryland USA
2. Goddard Planetary and Heliophysics Institute; University of Maryland Baltimore County; Baltimore Maryland USA
3. Research Institute for Sustainable Humanosphere; Kyoto University; Uji Japan
4. Solar-Terrestrial Environment Laboratory; Nagoya University; Nagoya Japan
5. National Institute of Information and Communication Technology; Tokyo Japan
6. Division of Earth and Planetary Sciences, Graduate School of Science; Hokkaido University; Sapporo Japan