1. Department of Earth, Planetary and Space Sciences; University of California; Los Angeles CA USA
2. Department of Climate and Space Sciences and Engineering; University of Michigan; Ann Arbor MI USA
3. Department of Physics and Astronomy; University of Iowa; Iowa City IA USA
4. Space Sciences Laboratory; University of California; Berkeley CA USA
5. NASA Goddard Space Flight Center; Greenbelt MD USA
6. High Performance Computing and Visualization; KTH; Stockholm Sweden
7. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder CO USA