1. Haystack Observatory, Massachusetts Institute of Technology Westford MA USA
2. Department of Astrophysical and Planetary Sciences University of Colorado Boulder CO USA
3. Department of Physics Boston College Chestnut Hill MA USA
4. Space Environment Technologies Pacific Palisades CA USA
5. Institute for Scientific Research Boston College Newton MA USA
6. Laboratory for Atmospheric and Space Physics University of Colorado Boulder CO USA
7. Space Sciences Center University of Southern California CA USA