1. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA
2. University of Alaska Fairbanks Fairbanks AK USA
3. SRI International Menlo Park Menlo Park CA USA
4. Now at Department of Atmospheric and Oceanic Sciences University of California Los Angeles CA USA
5. Center for Space Physics and Department of Electrical and Computer Engineering Boston University Boston MA USA
6. Clemson University Clemson SC USA
7. Now at Space Weather Technology Research and Education Center (SWx TREC) University of Colorado Boulder Boulder CO USA