Montana State University, Department of Physics, Montana State University, Bozeman, MT 59717, USA
Hanscom AFRL, Space Weather Center of Excellence, Air Force Research Laboratory, Space Vehicles Directorate, Hanscom Air Force Base, Hanscom AFB, MA 01731, USA
ISR Boston College & AFRL, AFRL/VSBXS 29 Randolph Road, Hanscom Air Force Base, Hanscom AFB, MA 01731-3010, USA