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One can easily get lost in the alphabet soup that is datalink. Both ACARS and ADS-B provide datalink applications – which can be broken down in terms of CNS: Communication, Navigation, and Surveillance. ACARS is used for: Communication: includes uplinking (ground → aircraft) weather data upon a downlink request to the company/service provider – not a ...


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As an additional point... the reason ADS was given its own frequencies was so that other communications would not interfere with the needed Position and Identification information sent out via that method. ADS can in many places surplant the need (though I'm not at all suggesting that it should do so) for primary radar. There are too many things that can end ...


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