1. Space and Plasma Physics, School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm Sweden
2. Swedish Institute of Space Physics Uppsala Sweden
3. Laboratoire de Physique des Plasmas LPP Palaiseau Centre National de la Recherche Scientifique CNRS France
4. School of Space and Environment Beihang University Beijing China
5. Department of Earth and Environmental Sciences University of Munich Munich Germany
6. Max Planck Institute for Solar System Research Göttingen Germany