1. Leibniz Institute of Atmospheric Physics University of Rostock Kühlungsborn Germany
2. Space Sciences Laboratory University of California, Berkeley Berkeley CA USA
3. Institute of Geophysics and Geomatics China University of Geosciences Wuhan China
4. Department of Earth and Planetary Sciences Kyushu University Fukuoka Japan
5. Space Science Division U.S. Naval Research Laboratory Washington DC USA
6. Virginia Polytechnic Institute and State University Blacksburg VA USA