1. Center for Space Plasma and Aeronomic Research The University of Alabama in Huntsville Huntsville AL USA
2. Department of Aerospace Engineering Sciences University of Colorado Boulder Boulder CO USA
3. LPC2E, University of Orleans, CNRS Orleans France
4. Department of Space Science The University of Alabama in Huntsville Huntsville AL USA
5. Department of Physics and Space Science Center (EOS) University of New Hampshire Durham NH USA
6. Science and Technology Institute Universities Space Research Association Huntsville AL USA