ACARS is something else, it's like SMS for aircraft. Also interesting data. But this thread is about location: ADS-B (dependent broadcast) and to a lesser degr

ACARS is something else, it's like SMS for aircraft. Also interesting data. But this thread is about location: ADS-B (dependent broadcast) and to a lesser degree MLAT (secondary radar interrogation response), both of which primarily operate on 1090MHz. With an unmodified RTL-SDR you can receive both, not at the same time and you'll want to swap antennas since the ranges are so different, but still :). PS. The RTL-SDRs used for ADS-B often feature a modification: an analog filter centered at 1090MHz, which removes all other data but makes the 1090MHz reception better. You shouldn't have the filter if you want to play around on other frequencies with the same device.