Space and Atmospheric Physics, The Blackett Laboratory, Imperial College London, Prince Consort Road South Kensington, London, SW7 2BW United Kingdom; Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, RH5 6NT United Kingdom
Institute of Geophysics and Planetary Physics, University of California Los Angeles, Slichter Hall, UCLA, Los Angeles, 90095, USA
Institute of Geophysics and Planetary Physics, University of California Los Angeles, Slichter Hall, UCLA, Los Angeles, 90095, USA
Institute of Geophysics and Planetary Physics, University of California Los Angeles, Slichter Hall, UCLA, Los Angeles, 90095 United States; ESA, 8-10 rue Mario Nikis, Paris, 75015 France
Space and Atmospheric Physics, The Blackett Laboratory, Imperial College London, Prince Consort Road South Kensington, London, SW7 2BW United Kingdom