Encode and decode SELCAL (Selective Calling) aviation HF radio signals in audio WAV format. SELCAL alerts specific aircraft crews on oceanic HF routes using sequential dual-tone bursts from 16 ICAO-standard frequencies (312.6-2122.5 Hz). Use this skill whenever the user mentions SELCAL, selective calling, aviation HF, HF radio alert, aircraft selective call, cockpit alert tones, ICAO SELCAL, oceanic HF, SELCAL decoder, or wants to create/analyze SELCAL audio WAV files. Covers encoding (SELCAL codes to WAV) and decoding (WAV to SELCAL codes).
SELCAL (Selective Calling) codec for aviation HF radio. Encode and decode SELCAL alerting signals used to alert specific aircraft crews on oceanic and remote HF routes.
SELCAL is the selective calling system used on HF aviation radio to notify pilots of incoming radio calls without requiring continuous audio monitoring. Ground stations transmit a SELCAL code (unique to each aircraft) which triggers an alert in the cockpit. This codec allows aviation enthusiasts and SDR hobbyists to monitor, encode, and decode SELCAL signals.
python3 scripts/selcal_encode.py ABCD output.wav
python3 scripts/selcal_decode.py input.wav
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