1. IREAP; University of Maryland; College Park Maryland USA
2. Space Sciences Laboratory; University of California; Berkeley California USA
3. Department of Physics; West Virginia University; Morgantown West Virginia USA
4. Department of Physics and Astronomy; University of Delaware; Newark Delaware USA
5. Department of Atmospheric, Oceanic, and Space Sciences; University of Michigan; Ann Arbor Michigan USA
6. Department of Astronomy; University of California; Berkeley California USA