Operation Corona was a wireless deception strategy used by the RAF to confuse German night fighters during RAF Bomber Command raids on Germany during WW2 and was first used during the attack on the industrial centre of Kassel, Germany on the night of 22-23 October 1943.
The RAF used German Jews who fled to England from Germany to countermand orders from German Air Defence Headquarters to their pilots: they redirected fighters away from bombers or ordered them to land at various distant airfields. The Luftwaffe responded by replacing their male fighter controllers with women and the RAF countered this by using members of he Women’s Auxiliary Air Force.