AirSpy - RPi - RTL-SDR - ADS-B / AIS
well, that was acronym overload for you.. let me break it down: Airspy - https://airspy.com/ USB dongle to "listen to all the things" RPi = Raspberry Pi 4 - yes, they are back in stock & I just received a 4GB version. Couldn't remember why I had it on back order, so I thought I would use it for this project anyway. RTL-SDR = Software Defined Radio - basically a USB stick that acts as a scanner of radio waves - but not just audio / digital too. https://www.rtl-sdr.com/about-rtl-sdr/ So what can you do with this? Well, you can run software that allows you to see what Plane transponders are broadcasting ADS-B around the 100+mile radius of where you are (if your antenna is good enough) - basically flightaware.com You can see what Ships are broadcasting AIS messages, albeit usually within a 25m radius - basically marinetraffic.com Basically, devices transmit encoded messages and we can pick them up from the SDR and decode them and work out the details that they contain an...