1. School of Electrical Engineering; Aalto University; Espoo Finland
2. Space Research Institute; Austrian Academy of Sciences; Graz Austria
3. Earth Physics Department; St. Petersburg State University; St. Petersburg Russia
4. Institute of Computational Modelling; Siberian Branch of the Russian Academy of Sciences; Krasnoyarsk Russia
5. Polytechnic Institute, Department of Applied Mechanics; Siberian Federal University; Krasnoyarsk Russia