The advisory services, also known as "ADS-B In Services", consist of the Flight Information Service-Broadcast (FIS-B) and the Traffic Information Service-Broadcast (TIS-B).
TIS-B is an advisory-only service available to both a 1090ES ADS-B ground station and universal access transceiver (UAT) equipment users which aids in the visual acquisition of surrounding transponder-based traffic to increase situational awareness. TIS-B is a surveillance service that derives traffic information from one or more radar-based surveillance sources, ASDE-X, wide area multilateration and uplinks this traffic information to ADS-B In equipped aircraft. TIS-B enables ADS-B In equipped aircraft to receive position reports on non-ADS-B-equipped aircraft during the transition period to full ADS-B equipage in the NAS.
FIS-B is an uplink service that provides weather and non-control advisory information such as textual and graphical weather and other aeronautical information by use of a cockpit display. Only the UAT link supports the FIS-B service.
The Separation Services, also known as "ADS-B Out Services", consist of Automatic Dependent Surveillance-Broadcast (ADS-B) and ADS-B Rebroadcast (ADS-R).
ADS-B is a surveillance service using the automatic transmission of an aircraft's or surface vehicle's position and other state information. The source of ADS-B information is derived from the aircraft's navigation system. Other aircraft may receive this information and compare it to their own position to accurately determine relative position. Ground systems may also use ADS-B information to augment less accurate radar-based surveillance information, or to provide cost effective surveillance coverage in non-radar airspace.
A service volume is a defined volume of airspace in the NAS within which a set of SBS Services are provided and the required performance for the set of services is achieved. En Route Service Volumes are polygon shapes with vertices that define the boundaries and typically align with the division of airspace among Air Route Traffic Control Centers. The floor of coverage is specified to be equivalent to that of existing radar coverage.
A service volume is a defined volume of airspace in the NAS within which a set of ADS-B Services are provided and the required performance for the set of services is achieved. Terminal Service Volumes are typically cylindrical in shape, centered on an airport and have typical radius of 60 nautical miles. The floor is generally defined by line of sight (LOS) screening from the radars currently serving the service volume.
A service volume is a defined volume of airspace in the National Airspace System (NAS) within which a set of ADS-B Services are provided and the required performance for the set of services is achieved. Surface service volumes are generally cylindrical in shape, covering an airport and all approach and departure corridors out to five miles from the runway thresholds.