Institution: | a Centre d'Etude Spatiale des Rayonnements, BP 4346, 310028, Toulouse Cedex 4, France b CETP, Saint-Maur des Fossés, France c University of St. Petersburg, Russia d Geophysics Department, University of Washington, Seattle, USA e Institute of Space and Astronautical Science, Tokyo, Japan f Solar Terrestrial Environmental Laboratory, Nagoya University, Nagoya, Japan g Space Research Institute, Moscow, Russia |