The Duga was a Soviet “Over the horizon” radar system, and was a part of the Soviet missile defence early warning system that operated from July 1976 to December 1989.
The radar had a very high output signal, that could be heard all around the world, when it was activated. Amateur radio operators named it “The Russian Woodpecker”, after its “Tuk tuk tuk tuk” pulses, that interfered their shortwave radios.
It was once one of the most powerful military facilities in the Soviet Union's communist empire and stands a towering 150 meters high and stretches almost 700 meters in length.
