chapter  21
6 Communications, navigation and surveillance/air traffic management
Pages 3

In order to illustrate the principles of ADS-B, the

universal access transceiver (UAT) is described in

more detail. UAT uses conventional global

navigation satellite system (GNSS) technology

and a relatively simple broadcast communications

link, see Figure 21.19 for typical ADS-B

architecture. The 978 MHz universal access

transceiver (UAT) receives inputs from a global

navigation satellite system (GNSS), combines

this data with other parameters, e.g. airspeed,

heading, altitude and aircraft identity, to facilitate

the air traffic management, see Figure 21.20.