1. Department of Geophysics; Kyoto University; Kyoto Japan
2. Swedish Institute of Space Physics; Kiruna Sweden
3. Physics Institute; University of Bern; Bern Switzerland
4. Space Physics Laboratory; Vikram Sarabhai Space Center; Thiruvananthapuram India
5. Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency; Sagamihara Japan
6. Department of Earth and Planetary Sciences; Tokyo Institute of Technology; Tokyo Japan
7. Solar-Terrestrial Environment Laboratory; Nagoya University; Nagoya Japan