[1] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA
[2] NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div, Greenbelt, MD 20771 USA
[3] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
[4] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA
[5] Univ Calif Los Angeles, Los Angeles, CA USA
[6] Los Alamos Natl Lab, Los Alamos, NM USA
[7] Inst Atmospher Phys, Dept Space Phys, Prague, Czech Republic
[8] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic
[9] Bison Aerosp Inc, Newcastle, WY USA
[10] NASA, Goddard Space Flight Ctr, Heliophys Sci Div, Greenbelt, MD 20771 USA