Institution: | 1.Department for Astrophysical and Planetary Science,University of Colorado,Boulder,USA;2.Laboratory for Atmospheric and Space Physics,University of Colorado,Boulder,USA;3.Harvard-Smithsonian Center for Astrophysics,Cambridge,USA;4.Southwest Research Institute,Boulder,USA;5.NASA Goddard Space Flight Center,Greenbelt,USA;6.American University,Washington,USA |