1. Max Planck Institute for Solar System Research, Göttingen, Germany
2. ReSoLVE Centre of Excellence, Dept. of Computer Science, Aalto University, Aalto, Finland
3. NORDITA, KTH Royal Inst. of Technology and Stockholm University, Stockholm, Sweden
4. Dept. of Astronomy, AlbaNova University Center, Stockholm University, Stockholm, Sweden
5. JILA and Dept. of Astrophysical and Planetary Sciences, University of Colorado, Boulder, USA
6. Laboratory for Atmospheric and Space Physics, Boulder, USA
7. Georg-August-Universität Göttingen, Institut für Astrophysik, Göttingen, Germany