Rádio Aéreo
Guarulhos tower, live, and the stories hidden in it.
Rádio Aéreo listens to Guarulhos, the busiest airport in South America, around the clock. Six frequencies run at once (final approach, tower, two ground positions, traffic and the recorded ATIS). A voice detector cuts the audio into single transmissions, a Whisper model coached on Brazilian air traffic Portuguese writes each one down, and every call is pinned to the aircraft it belongs to on a live radar map.
Matching is the hard part. Controllers shorten callsigns to the last three digits and pilots read them back in a hurry, so each transcript is scored against the aircraft actually visible on ADS-B, with room for one wrong digit. When the evidence is thin the call stays unassigned. On the ground, where transponders go quiet, the gaps in a plane's track are filled by routing it along the airport's real taxiways.
The archive has become a show. Rádio Aéreo cuts the best moments into vertical episodes: an A380 forced to go around, a kite on short final, a midnight jam at the holding point. Each one replays the real radio over every aircraft moving on the map, with captions that follow the words and fast forward through the silence. No go-around makes it into an episode until the ADS-B track confirms it.