Tracking Planes with a Raspberry Pi

I'm tracking airplanes by listening to their ADS-B transponders over the airwaves! I have dump1090 running on a Raspberry Pi, sending the aircraft data over my local network, and an RTL-SDR receiver (silver dongle in the Pi in the second photo) picking up the signal. I've started some notes on ADS-B transponders as well as on using an RTL-SDR receiver more generally in the new digital garden…