The Russian Woodpecker… A Closer Look (David L. Wilson, Monitoring Times, August 1985)

Period Western technical analysis of the Woodpecker signal, page 5 of the August 1985 Monitoring Times: the two-site hypothesis (‘believed to use two locations in the western USSR, Minsk and Nikolayev’), the 10/16/20 Hz repetition rates with 10 Hz dominant, static and dynamic operating modes, and frequency/time-window behaviour - measured by a hobbyist with an externally triggered oscilloscope while the radar was on the air. The same issue carries ANARC’s ‘Woodpecker Project,’ an organized 24-hour worldwide logging campaign to document the interference for policymakers. Full issue PDF at worldradiohistory.com.