Imperial College London, Space and Atmospheric Physics, Blackett Laboratory, Imperial College London, London, SW72BW, United Kingdom
Imperial College London, Space and Atmospheric Physics, Blackett Laboratory, Imperial College London, London, SW72BW, United Kingdom
Centre National de la Recherche Scientifique, Centre d'Étude Spatiale des Rayonnements, 9 avenue du Colonel Roche, PO Box 4346, Toulouse, 31028, France