April

01/04/1994 Ionosphere Department joined the Institute of Atmospheric Physics

01/04/1960 The first successfully operated meteorological satellite, TIROS-1, was launched

14/04/2023 Launch of the European spacecraft JUICE, for which IAP developed the Low Frequency Receiver (LFR)

22/04 Earth Day

25/04/1874 * Guglielmo G. M. Marconi, inventor of the successful wireless telegraph (+ 20 July 1937)

30/04/1777 * Carl F. Gauss, who predicted existence of the ionosphere from fluctuations in the Earth´s magnetic field (+ 23 February 1855)