Getting Data From The Sky
summary
Claim: a cheap $10 USB DVB-T/FM radio dongle off Amazon plus RTL‑SDR hacks decode unencrypted 1090 MHz ADS‑B/Mode S traffic live in JavaScript. Implementation uses an RTL2832U‑capable dongle, an Mode S/ADS‑B decoder and low‑level rtl‑sdr bindings, sampling at 2.2 MHz (~4 MB/s). Prototype plots aircraft on Google Maps, receives dozens to over 100 messages per plane and runs live from a tiny antenna, proving the build works and the protocol has no encryption.
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