1. Institute for Space‐Earth Environmental ResearchNagoya University Nagoya Japan
2. Space and Upper Atmospheric Sciences GroupNational Institute of Polar Research Tachikawa Tokyo Japan
3. Now at KUBOTA, Inc. Osaka Japan
4. Electronic and Photonic Systems Engineering CourseKochi University of Technology Kami Japan
5. Now at Nishimu Electronics Industries Co., Ltd Fukuoka Japan
6. Department of Computer and Network EngineeringUniversity of Electro‐Communications Chofu Japan
7. Department of CosmosciencesHokkaido University Sapporo Japan
8. Department of Physics and AstronomyClemson University Clemson SC USA
9. Ionospheric Physics UnitUniversity of Oulu Oulu Finland