1. High Altitude Observatory National Center for Atmospheric Research Boulder CO USA
2. Department of Earth Sciences University of Hong Kong Pokfulam Hong Kong
3. Applied Physics Laboratory Johns Hopkins University Laurel MD USA
4. CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences University of Science and Technology of China Hefei China
5. Department of Earth and Planetary Science Kyushu University Fukuoka Japan
6. Department of Physics and Astronomy Rice University Houston TX USA
7. Thayer School of Engineering Dartmouth College Hanover NH USA