University of Arizona, Department of Physics, 1118 East 4th Street, Tucson, AZ 85721 United States ; University of Michigan, Space Science Research Laboratory, 2455 Hayward Street, Ann Arbor, MI 48109 United States
University of Michigan, Space Science Research Laboratory, 2455 Hayward Street, Ann Arbor, MI 48109 United States
University of Arizona, Department of Physics, 1118 East 4th Street, Tucson, AZ 85721 United States
University of Michigan, Space Science Research Laboratory, 2455 Hayward Street, Ann Arbor, MI 48109 United States ; University of Maryland, Department of Physics, College Park, MD 20742 United States
University of Michigan, Space Science Research Laboratory, 2455 Hayward Street, Ann Arbor, MI 48109 United States