1. Solar-Terrestrial Environment Laboratory; Nagoya University; Nagoya Japan
2. Faculty of Engineering; Shinshu University; Matsumoto Japan
3. RIKEN; Wako Japan
4. Tromsø Geophysical Observatory; University of Tromsø; Tromsø Norway
5. National Institute of Polar Research; Tachikawa Japan
6. Faculty of Science; University of Tromsø; Tromsø Norway
7. Faculty of Science and Technology; Seikei University; Musashino Japan