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Showing posts from February, 2026

Aircraft-to-satellite log on table

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 This blog tries to explain the 'logon' table located here:  https://tbg.airframes.io/dashboard/logon Intro Before an aircraft can send any messages through any of the usual Inmarsat satellites, it has to initiate a log on handshake. A sort of formal introduction. This table, and the Node-RED low-code behind it, attempts to catch those introductions and records the time it takes place and via which satellite. I then add to this 'logon ping' message a lookup on the aircraft HEX used for the log on and see if we have any callsigns or past ACARS for the handshake ICAO. ICAO HEX Did you read those last 6 words carefully? Go back and read them again. Did it sink in? Did a dark light come on? avgeeks using this table along with the other tables on my site have found that when the aircraft logs on to the satellite, more often than not it logs on with its 'real' HEX. Once the connection is approved, the aircraft will sometimes switch to its TACHEX (Tactical or dynamic o...