Page 23 - ITU-T Focus Group on Aviation Applications of Cloud Computing for Flight Data Monitoring - Use cases and requirements

ITU-T Focus Group on Aviation Applications of Cloud Computing for Flight Data Monitoring
Use cases and requirements

Example message

(position report; content only)

/PSN47261W122185,SEA,093118,350,ORTIN,093436,BARRO,M32,120015,0485,789,ECON

3.6 ADS-B and ADS-C
Automatic dependent surveillance-broadcast (ADS-B) is a cooperative surveillance technology in which an
aircraft determines its position via satellite navigation and periodically broadcasts it, enabling it to be tracked.
The information can be received by air traffic control ground stations as a replacement for a secondary radar.
It can also be received by other aircraft to provide situational awareness and allow self-separation. Benefits
include both safety and efficiency of flight: traffic, weather, terrain, flight information, and expenses. ADS-B is
"automatic" in that it requires no pilot or external input. It is "dependent" in that it depends on data from the
aircraft's navigation system. ADS-B equipment is currently mandatory in portions of Australian airspace, the
United States requires some aircraft to be equipped by 2020 and the equipment will be mandatory for some
aircraft in Europe from 2017; meanwhile Canada is already using ADS-B for air traffic control.

Automatic dependent surveillance-contract (ADS-C) uses a "contract" concept. A ground system, for instance
the air traffic controller, can request ADS-C reports from the aircraft. Within this request, the frequency of
the report transmissions can be defined. Pilots can see the active contracts and terminate them or initiate a
contract on their own.
ADS-B and ADS-C messages exist in different versions and with different content.

Examples of ADS messages

3.7 Air traffic control (ATC)
Air traffic control (ATC) is a service provided by ground-based controllers who direct aircraft on the ground
and through controlled airspace, and can provide advisory services to aircraft in non-controlled airspace.

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