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free103point9 Newsroom has moved to http://free103point9.wordpress.com/as of March 18, 2010 A blog for radio artists with transmission art news, open calls, microradio news, and discussion of issues about radio art, creative use of radio, and radio technologies. free103point9 announcements are also included here.

Tuesday, July 21, 2009

The Woodpecker


From Wikipedia:
The Russian Woodpecker was a notorious Soviet signal that could be heard on the shortwave radio bands worldwide between July 1976 and December 1989. It sounded like a sharp, repetitive tapping noise, at 10 Hz, giving rise to the "Woodpecker" name. The random frequency hops disrupted legitimate broadcast, amateur radio, and utility transmissions and resulted in thousands of complaints by many countries worldwide. The signal was long believed to be that of an over-the-horizon radar (OTH) system. This theory was publicly confirmed after the fall of the Soviet Union, and is now known to be the Duga-3[1] system, part of the Soviet ABM early-warning network. This was something that NATO military intelligence was well aware of all along, having photographed it and giving it the NATO reporting name Steel Yard.

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