Petr Pisoft¹, Petr Šácha¹, Peter Huszar¹, Ales Kuchar¹, Michal Zak¹, Jiri Miksovsky², Jan Karlicky¹, Harald E Rieder³ and Juan A. Añel⁴, (1)Charles University, Faculty of Mathematics and Physics, Department of Atmospheric Physics, Prague, Czech Republic, (2)Charles University, Faculty of Mathematics and Physics, Department of Atmospheric Physics, Prague, 180, Czech Republic, (3)BOKU University of Natural Resources and Life Sciences, Institute of Meteorology, Vienna, Austria, (4)University of Vigo, EPhysLab, Ourense, Spain