1. IRAP, Université de Toulouse, CNRS, UPS, CNES, F-31400 Toulouse, France
2. Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria
3. Naval Research Laboratory, Space Science Division, Washington, DC 20375, USA
4. School of Physics, Trinity College Dublin, University of Dublin, Dublin-2, UK
5. Université Grenoble Alpes, IPAG, F-38000 Grenoble, France
6. Space Astronomy Group, ISRO Satellite Centre, Airport Roa, Bangalore 560017, India
7. Indian Institute of Astrophysics, Bangalore 560 034, India
8. Special Astrophysical Observatory, Laboratory of Stellar Magnetism, Nizhnii Arkhyz, Karachai-Cherkessian Republic 369167, Russia