Luxemburg–Gorky effect
In radiophysics, the Luxemburg–Gorky effect (named after Radio Luxemburg and the city of Gorky (Nizhny Novgorod)) is a phenomenon of cross modulation between two radio waves, one of which is strong, passing through the same part of a medium, especially a conductive region of atmosphere or a plasma. Current theory seems to be that the conductivity of the ionosphere is affected by the presence of strong radio waves.