Inside The Russian Short Wave Radio Enigma

From a lonely rusted tower in a forest north of Moscow, a mysterious shortwave radio station transmitted day and night. For at least the decade leading up to 1992, it broadcast almost nothing but beeps; after that, it switched to buzzes, generally between 21 and 34 per minute, each lasting roughly a second—a nasally foghorn blaring through a crackly ether.....

Full story at :
http://www.wired.com/magazine/2011/09/ff_uvb76/