"rf""sdr""wireless"
13 min readI Built a Real-Time Radar with a $25 USB Stick ✈️
Every commercial airplane overhead is screaming its GPS position, altitude, speed, and callsign at 1090 MHz — unencrypted — for anyone to receive. I tuned in with my RTL-SDR and suddenly had my own live air traffic radar. FlightRadar24 doesn't know what I know.
Mar 06, 2026