Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
Department of Space Physics, Institute of Atmospheric Physics CAS, Prague, Czech Republic; `Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
NASA/GSFC, Greenbelt, MD, United States
University of Iowa, Iowa City, IA, United States
University of Iowa, Iowa City, IA, United States
LESIA/ Observatoire de Paris, Paris, France; LPPP/CNRS - Ecole Polytechnique, Palaiseau, France
University of Iowa, Iowa City, IA, United States
Belgian Institute for Space Aeronomy, Brussels, Belgium
Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States