1. Faculty of Mathematics and Natural Sciences University of Rostock Rostock Germany
2. Leibniz‐Institute of Atmospheric Physics University of Rostock Kuehlungsborn Germany
3. British Antarctic Survey UKRI‐NERC Cambridge UK
4. Sodanklä Geophysical Observatory University of Oulu Sodankyla Finland
5. Institute for Solar‐Terrestrial Physics German Aerospace Center Neustrelitz Germany