Jan Soucek¹, Ludek Uhlir¹, Radek Lan¹, David Pisa¹, Ivana Kolmasova², Ondrej Santolik¹, Vratislav Krupar^3,4, Oksana Kruparova⁴ and Milan Maksimovic⁵, (1)Institute of Atmospheric Physics ASCR, Department of Space Physics, Prague, Czech Republic, (2)Department of Space Physics, Institute of Atmospheric Physics CAS, Prague, Czech Republic, (3)Universities Space Research Association Columbia, Columbia, MD, United States, (4)Institute of Atmospheric Physics CAS, Department of Space Physics, Prague, Czech Republic, (5)Observatoire de Paris, LESIA, Meudon, France