1. Department of Climate and Space Sciences and Engineering University of Michigan Ann Arbor MI USA
2. Solar System Exploration Division NASA Goddard Space Flight Center Greenbelt MD USA
3. Department of Physics and Astronomy Howard University Washington DC USA
4. Space Sciences Laboratory University of California Berkeley CA USA
5. Department of Astronomy University of Maryland College Park MD USA
6. Department of Geophysics Graduate School of Science Kyoto University Kyoto Japan