¹ Institute for Cosmic-Ray Research, University of Tokyo, Tokyo 188-8502, Japan
² Faculty of Engineering, Yamanashi University, Kofu 400-8511, Japan
³ Department of Physics, Saitama University, Urawa 338-8570, Japan
⁴ Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
⁵ Nishina Memorial Foundation, Komagome, Tokyo 113-0021, Japan
⁶ Faculty of General Education, Hirosaki University, Hirosaki 036-8560, Japan
⁷ Department of Physics, Osaka City University, Osaka 558-8585, Japan
⁸ Faculty of Education, Yamanashi University, Kofu 400-8510, Japan
⁹ Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan
¹⁰ Nagoya University of Foreign Studies, Nissin, Aichi 470-0131, Japan
¹¹ Department of Applied Physics and Chemistry, Fukui University of Technology, Fukui 910-8505, Japan
¹² National Institute of Radiological Sciences, Chiba 263-8555, Japan
¹³ Department of Physics, Ehime University, Matsuyama 790-8577, Japan