An anonymous reader writes: Every year politicians and business men meet at the World Economic Forum in the small mountain town of Davos, Switzerland to discuss various topics and create business deals. This year Quartz, an online newspaper/magazine sent a journalist to the forum tasked with writing a unconventional story about the forum: he was asked to monitor the private helicopter traffic coming in and out of Davos from transponder broadcast of ADS-B data. Using an $20 RTL-SDR dongle, Raspberry Pi and ADS-B collinear antenna they monitored the flights over Davos. From the data they were able to determine the flight paths that many helicopters took, the types of helicopters used and the most popular flight times.
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