Theory of Operation
The ADS-B system has three main components: 1) ground infrastructure, 2) airborne component, and 3) operating procedures.
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ADS-B System
- A transmitting subsystem that includes message generation and transmission functions at the source; e.g., airplane.
- The transport protocol; e.g., VHF (VDL mode 2 or 4),1090ES, or 978 MHz UAT.
- A receiving subsystem that includes message reception and report assembly functions at the receiving destination; e.g., other airplanes, vehicle or ground system.
The source of the state vector and other transmitted information as well as user applications are not considered to be part of the ADS-B system.
Read more about this topic: Automatic Dependent Surveillance-broadcast
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