A Python encoder that builds forged 1090ES ADS-B Extended Squitter frames (chosen ICAO address, position, altitude) into an I/Q sample file for transmission by a TX-capable SDR (HackRF via hackrf_transfer). The concrete way to demonstrate ADS-B spoofing/injection — there is no authentication on the link, so a higher-power forged frame is accepted as a real aircraft. Author states it is for academic purposes only. AUTHORIZED, RF-CONTAINED testing only: never radiate on-air — use a shielded enclosure or a conducted (cabled) setup. Stable but inactive (last commit ~2021).