Virginia Tech, Department of Electric and Computer Engineering, Blacksburg, VA 24061, USA; University of Michigan, Space Physics Research Laboratory, Ann Arbor, MI 48109-2143, USA
University of Michigan, Space Physics Research Laboratory, Ann Arbor, MI 48109-2143, USA
University of Michigan, Space Physics Research Laboratory, Ann Arbor, MI 48109-2143, USA
University of Michigan, Space Physics Research Laboratory, Ann Arbor, MI 48109-2143, USA
University of Michigan, Space Physics Research Laboratory, Ann Arbor, MI 48109-2143, USA