1. Department of Earth, Planetary, and Space Sciences University of California Los Angeles CA USA
2. Space Research Institute of Russian Academy of Sciences Moscow Russia
3. Polar Geophysical Institute Apatity Russia
4. Institute of Applied Physics RAS Nizhny Novgorod Russia
5. LPC2E CNRS Orleans France
6. Sodankylä Geophysical Observatory Sodankylä Finland
7. Department of Earth and Planetary Science School of Science The University of Tokyo Tokyo Japan
8. Institute for Space Earth Environmental Research Nagoya University Nagoya Japan
9. Graduate School of Science Kyoto University Kyoto Japan
10. Graduate School of Natural Science and Technology Kanazawa University Kanazawa Japan
11. Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Japan
12. Osaka University Osaka Japan