How ADS-B Exchange Works - ADS-B Exchange
https://www.adsbexchange.com/how-it-works/
WEBAutomatic Dependent Surveillance–Broadcast (ADS-B) is a surveillance technology that allows aircraft to automatically broadcast essential information, such as their current position, altitude, and velocity, at regular intervals. This information is relayed via radio waves, typically on the 1090 MHz frequency for commercial aviation ...
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