1. Department of Mathematics, Physics and Electrical Engineering Northumbria University Newcastle‐upon‐Tyne UK
2. European Space Research and Technology Centre European Space Agency Noordwijk The Netherlands
3. Old College University of Edinburgh Edinburgh UK
4. Institute for Physics, Laboratory for Galaxy Evolution and Spectral Modelling Ecole Polytechnique Federale de Lausanne, Observatoire de Sauverny Versoix Switzerland
5. Space Research Institute Austrian Academy of Sciences Graz Austria
6. Swedish Institute of Space Physics Kiruna Sweden
7. Swedish Institute of Space Physics Uppsala Sweden