1. Space Research Institute of Russian Academy of Sciences, Moscow 117997, Russia
2. Faculty of Physics, National Research University Higher School of Economics, 21/4 Staraya Basmannaya Ulitsa, Moscow 105066, Russia
3. New Jersey Institute of Technology, Newark, New Jersey 07102, USA
4. Space Sciences Laboratory, University of California at Berkeley, Berkeley, California 94720, USA
5. Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90095, USA