Questions tagged [data-link]

Questions about data link in communication, navigation and surveillance.

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Arinc 429: how to detect the data frame start?

I am designing an Arinc429 receiver based on a micro-controller with two interrupt inputs served by a circuit converting the +/-10V standard signals into two separated 0-3.3V streams, respectively ...
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Do we need to do the SELCAL check if given an HF frequency by datalink?

If the controller sent us a message through datalink to monitor HF frequency (P xxxx S xxxxx ) and continue CPDLC, do we need to do the SELCAL check?
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How impactful could an ATC-specific speech-to-text AI model be for the aviation industry?

Various initiatives, such as the European SESAR 3 program, the Airbus Speech Recognition Challenge, or Appareo's technology, highlight a growing interest in tailored Automatic Speech Recognition (ASR) ...
A R's user avatar
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What is the difference between data link transmission over VHF and VDL (VHF Data Link Mode-2)?

Early FANS 1/A used ACARS network to transmit data link messages from applications like CPDLC & ADS-C using VHF or HF. FANS 1/A+ used the same ACARS network to transmit data link messages from ...
Krishna Kanth's user avatar
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What's the difference between ACARS and ATSU?

I've seen ACARS and ATSU used interchangeably and I've seen references that imply they're different things (ATSU being Airbus only). How would I explain the difference to someone?
J.J.'s user avatar
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Cost for teletype type B (TTY) message exchange over SITA network

Does anyone know which party (sender or receiver) bears the cost of sending TTY messages over the SITA network that are commonly used between airlines, GDSs and different vendors. Thanks.
rk0905's user avatar
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1 vote
1 answer
454 views

Aircraft engine communication with satellite

Do pilots get an audible indication when the engines are communicating with the manufacturer whilst in flight. Do these "pings" or "hanshakes" begin on start up and are they always ...
Tevios's user avatar
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2 votes
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Why do some military aircraft carry two datalink pods?

I was taking a look at pictures of the SLAM-ER when I noticed an F/A-18C carrying two AWW-13 datalink pods on its left wing. Why carry a second one? Does it increase signal strength or something? ...
SpaceEnthusiast's user avatar
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How does an aviation business get an AFTN address?

How does an aviation business get an AFTN address to receive FPL messages from Air Navigation Service Providers?
Geena's user avatar
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1 answer
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What are the differences between FANS A, B, and C? Is FANS C commissioned?

For the Future Air Navigation System, what are the differences between FANS A, B, and C? Is FANS C commissioned?
user47378's user avatar
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In terms of communication with a computer with the receiver in a glider, is there a certain frequency I should consider? [closed]

I am part of a university team of engineers that design and manufacture a plane. My sub-team is in charge of designing an autonomous glider that needs to deploy from the plane and land in a given zone....
Chris's user avatar
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What are the fields of the ground reply (uplink) to a weight-and-balance request?

I am trying to send from the Aircraft MCDU AOC menu (via ACARS Data Link) , a Weight/Balance Request downlink to the Ground Station . I would like to know what are the fields that make up the uplink ...
fahdovski's user avatar
2 votes
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194 views

Do strike aircraft turn off their datalink?

As far as I know, it is normal procedure for aircraft on a strike mission to go into radio silence at a certain point of the mission, as to not give of any unnecessary emissions that could warn the ...
user33651's user avatar
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15 votes
1 answer
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Why is air traffic control done manually by humans?

I'm not a pilot but have a software developer background, so forgive my aviation naivety. From what I understand there have been numerous issues and almost-issues relating to human air traffic ...
AlphaCentauri's user avatar
3 votes
1 answer
2k views

What's the relationship between FANS and CPDLC?

I'm confused about Future Air Navigation System (FANS) and Controller–pilot data link communications (CPDLC). Someone said FANS includes CPDLC, another said it does not.
John's user avatar
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1 answer
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Which pilot (pilot flying, pilot monitoring) handles CPDLC (operates CPDLC interface)?

This question relates to commercial flights, typical two-pilot crew: In some airspaces, e.g. North Atlantic, pilots and Air Traffic Control use Controller Pilot Data Link Communication (CPDLC, ...
Stefan's user avatar
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4 votes
2 answers
2k views

Why doesn't ADS-B use satcoms like ADS-C?

With ADS-C, in the middle of remote areas (like ocean), we can send position report via satellite data link. So, why ADS-B systems on airplane uses ground based stations (VHF datalink) rather than ...
Mustafa's user avatar
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9 votes
2 answers
776 views

Why can't flight management systems receive instructions directly from the controller?

If an aircraft's flight management system has auto pilot and auto thrust coupling, and it can make changes to the aircraft speed and direction along the entire route without pilot intervention, then ...
Dana Lynde's user avatar
5 votes
1 answer
1k views

How can shifting to TCP/IP make current aviation systems more delay-tolerant?

I've recently been reading a number of articles on the current aviation systems. Many of them say that the current aviation infrastructure is 'inefficient' since it is based on OSI model and, so, ...
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