1. Space Science and Engineering Division Southwest Research Institute San Antonio TX USA
2. Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA
3. NASA Marshall Space Flight Center Huntsville AL USA
4. Emeritus University of Alabama in Huntsville Huntsville AL USA
5. Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham NH USA
6. Department of Physics and Astronomy University of Iowa Iowa City IA USA
7. Department of Physics and Astronomy University of Minnesota, Twin Cities Minneapolis MN USA
8. Los Alamos National Laboratory Los Alamos NM USA
9. Oak Ridge National Laboratory Oak Ridge TN USA