Erika Palmerio¹, Olivier G Witasse², Teresa Nieves-Chinchilla³, David Barnes⁴, Marilena Mierla⁵, Andreas J Weiss⁶, Christian Moestl⁷, Andrei Zhukov⁸, Lan Jian³, Beatriz Sanchez-Cano⁹, Luciano Rodriguez⁵, Jingnan Guo¹⁰, Elias Roussos¹¹, Adam Masters¹², Gabrielle Provan¹³, Alexey Isavnin¹⁴, Patrick J Lowrance¹⁵, Lucile Turc¹⁶ and K Emilia J Kilpua¹, (1)University of Helsinki, Helsinki, Finland, (2)European Space Agency, Noordwijk, Netherlands, (3)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (4)Rutherford Appleton Laboratory, Didcot, OX11, United Kingdom, (5)SIDC, Royal Observatory of Belgium, Uccle, Belgium, (6)Space Research Institute, Austrian Academy of Sciences, Graz, Austria, (7)Institute of Physics, University of Graz, Graz, Austria, (8)Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia, (9)University of Leicester, Leicester, LE1, United Kingdom, (10)University of Kiel, Institute of Experimental and Applied Physics, Kiel, Germany, (11)Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany, (12)JAXA Japan Aerospace Exploration Agency, Sagamihara, Japan, (13)University of Leicester, Leicester, United Kingdom, (14)Rays of Space Oy, Vantaa, Finland, (15)IPAC–Spitzer, California Institute of Technology, Pasadena, CA, United States, (16)LPP - CNRS - Ecole polytechnique - UPMC, Palaiseau, France