Finnish Meteorological Institute, P.O. Box 503, 00101, Finland

Finnish Meteorological Institute, P.O. Box 503, 00101, Finland

University of California, Space Sciences Laboratory, Berkeley, CA 947207450, USA

Finnish Meteorological Institute, P.O. Box 503, 00101, Finland

Space Research Institute, Schmiedlstrasse 6, Graz, 8042, Austria

Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK

St. Petersburg State University, Petrodvoretz, 198504 St. Petersburg, Russia

Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA

St. Petersburg State University, Petrodvoretz, 198504 St. Petersburg, Russia