Christian Caryl
A pair of Ukrainian engineers quickly jury-rigged a solution. Today, the country is blanketed with a network of 9,500 microphones mounted on six-foot-tall poles. The microphones, which are attached to cell phones, track the Shaheds by sound (the propeller-driven drones have loud engines) and send that data to a central system that calculates their courses.
That information is then passed on to iPad-wielding soldiers in gun trucks that shoot down the slow-moving drones. Each sensor pole in the network costs less than $500—which makes the entire network, known as Sky Fortress, cheaper than a pair of Patriot missiles.
Christian Caryl is the former Moscow bureau chief for Newsweek and U.S. News & World Report. He has reported from more than 60 countries and is the author of Strange Rebels: 1979 and the Birth of the 21st Century. X: @ccaryl
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