Catholic University of America, Department of Physics, 200 Hannan Hall, Washington, DC 20064, USA; NASA Goddard Space Flight Center, Lab for Solar and Space Physics, code 612.1, Greenbelt, MD 20771, USA
NASA Goddard Space Flight Center, Lab for Solar and Space Physics, code 612.1, Greenbelt, MD 20771, USA
NASA Goddard Space Flight Center, Lab for Solar and Space Physics, code 612.1, Greenbelt, MD 20771, USA