The catholic University of America, Center for Solar Physics and Space Weather, Washington, DC 20064, USA; NASA Goddard Space Flight Center, Bldg 26, Rm G1, Code 682.3, Greenbelt, MD 20771, USA
The catholic University of America, Center for Solar Physics and Space Weather, Washington, DC 20064, USA; NASA Goddard Space Flight Center, Bldg 26, Rm G1, Code 682.3, Greenbelt, MD 20771, USA
NASA Goddard Space Flight Center, Bldg 2, Rm 023, Mailstop 661.0, Greenbelt, MD 20771, USA
California Institute of Technology, Mail Code 220-47, Pasadena, CA 91125, USA