Duga was an over-the-horizon radar system used in the Soviet Union as part of its early-warning radar network for missile defense. It operated from July 1976 to December 1989. Two operational duga radars were deployed, with one near Chernobyl and Chernihiv in the Ukrainian SSR, and the other in eastern Siberia.
The duga system was extremely powerful, reaching over 10 MW, and broadcast in the shortwave radio bands. Given the nickname, the Russian Woodpecker by shortwave listeners for their emissions randomly appearing and sounding like sharp, repetitive tapping noises at a frequency of 10 Hz. The random frequency hops often disrupted legitimate broadcasts, amateur radio operations, oceanic commercial aviation communications, and utility transmissions, resulting in thousands of complaints by many countries worldwide.
Wikipedia https://en.wikipedia.org/wiki/Duga_radar
Address Ukraine
Coordinates 51°18'18.544" N 30°3'59.359" E
