University of Kansas Department of Physics and Astronomy, Malott Hall, Lawrence, KS 66045, USA
Johns Hopkins University Department of Physics and Astronomy, 3400 N. Charles Street, Baltimore, MD 21218, USA; NASA/Goddard Space Flight Center, Code 662, Greenbelt, MD 20771, USA
NASA/Goddard Space Flight Center, Code 612.2 - Heliospheric Physics, Greenbelt, MD 20771, USA
NASA/Goddard Space Flight Center, Code 662, Greenbelt, MD 20771, USA
University of Kansas Department of Physics and Astronomy, Malott Hall, Lawrence, KS 66045, USA