1. Climate and Space Sciences and Engineering University of Michigan Ann Arbor MI USA
2. Laboratoire de Physique des Plasmas (LPP), École Polytechnique, CNRS Sorbonne Université, Institut Polytechnique de Paris Palaiseau France
3. Department of Physics University of Helsinki Helsinki Finland
4. NASA Goddard Space Flight Center Greenbelt MD USA
5. Blackett Laboratory Imperial College London UK