Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Holmbury St. Mary, Dorking, RH5 6NT, United Kingdom
Institute of Geophysics and Planetary Physics, University of California, Los Angeles, Slichter Hall, Los Angeles, CA 90095, USA
Institute of Geophysics and Planetary Physics, University of California, Los Angeles, Slichter Hall, Los Angeles, CA 90095, USA
NASA Goddard Space Flight Centre, 8800 Greenbelt Road, Greenbelt, MD 20771, USA
Research and Scientific Support Department, European Space Agency, Keplerlaan 1, Noordwijk, 220, Netherlands
Los Alamos National Laboratory, Space Science and Applications (ISR-1), Los Alamos, NM 87545, USA
Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Holmbury St. Mary, Dorking, RH5 6NT, United Kingdom
Space and Atmospheric Physics Group, The Blackett Laboratory, Imperial College London, South Kensington, London, SW7 2AZ, USA