1. The Johns Hopkins University Applied Physics Laboratory Laurel MD USA
2. Department of Physics and AstronomyDartmouth College Hanover NH USA
3. Institute of Space and Astronautical Science Sagamihara Japan
4. Department of GeophysicsTohoku University Sendai Japan
5. Graduate School of Natural Science and TechnologyKanazawa University Kanazawa Japan
6. Institute of Space‐Earth Environmental ResearchNagoya University Nagoya Japan
7. Graduate School of Science, Department of Earth and Planetary ScienceThe University of Tokyo Tokyo Japan
8. Graduate School of ScienceKyoto University Kyoto Japan
9. National Centers for Environmental InformationNational Oceanic and Atmospheric Administration Boulder CO USA
10. Cooperative Institute for Research in Environmental SciencesUniversity of Colorado at Boulder Boulder CO USA