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In the last 3 months, i started feeding to Flightradar24 ADB-S probes since i always wanted and was curious how radio positioning-based tracking works, in this small post i will try to write down some considerations and hands-on notes for those who want to experiment with in the same way or set up Before we start here is some theory, so what’s ADB-S? ADB-S stands for Automatic Dependent Surveillance and in short for non-technical people could be reduced as: Each Plane, Boat or any ground vehicle that has ADB-S transmitters sends specific messages Those messages do contain useful data such as position, heading, altitude, radio callsign, etc.. Most aircraft in Europe nowadays require to send out ADB-S messages (I think there are exemptions but for obvious reasons e.g. military, police, etc..) Ok, cool now that we know what is and what is used for how can we track those messages? Let’s start with the ingredients before cooking: RTL-SDR / USB dongle or any radio receiver able to...