Lorenzo Matteini^1,2, Christopher H K Chen³, David Stansby⁴, Timothy Simon Horbury⁴, Denise Perrone⁵, Anna Tenerani⁶, Marco Velli⁷, Stuart Bale⁸, Marc Pulupa⁹, David Malaspina¹⁰, John W Bonnell⁹, Peter Harvey⁹, Keith Goetz¹¹, Thierry Dudok de Wit¹² and Robert J MacDowall¹³, (1)Imperial College London, Physics Department, London, United Kingdom, (2)Observatoire de Paris, LESIA, Paris, France, (3)Queen Mary University of London, School of Physics and Astronomy, London, United Kingdom, (4)Imperial College London, London, SW7, United Kingdom, (5)ASI – Italian Space Agency, Rome, Italy, (6)California Institute of Technology, Pasadena, CA, United States, (7)University of California Los Angeles, Los Angeles, CA, United States, (8)University of California, Berkeley, Berkeley, CA, United States, (9)University of California, Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (10)University of Colorado, Boulder, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (11)University of Minnesota, Minneapolis, MN, United States, (12)LPC2E, CNRS and University of Orléans, Orléans, France, (13)NASA/Goddard Space Flight Center, Greenbelt, United States