Institute of Space Physics and Applied Technology, Peking University, Beijing, China

Department of Electrical and Computer Engineering, Democritus University of Thrace, Xanthi, Greece

Institute of Astronomy and Astrophysics, National Observatory of Athens, Athens, Greece

Institute of Space Physics and Applied Technology, Peking University, Beijing, China

Center for Atmospheric Research, University of Massachusetts Lowell, Lowell, MA, USA

Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, USA

Department of Electrical and Computer Engineering, Democritus University of Thrace, Xanthi, Greece

Department of Electrical and Computer Engineering, Democritus University of Thrace, Xanthi, Greece

Physics Department and Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, USA

Center for Space Physics, Department of Astronomy, Boston University, Boston, MA, USA