Operational Use of ADS-B In Non Radar Airspace Generic Design Safety Case
3.0 Operational Use and System Description of ADS B
3.1 ADS B in Operational Use
Increased safety The operational use of ADS–B in non-radar airspace will provide several in non radar significant benefits to air navigation service providers and to the safety airspace of flying operations in such airspace. In many airspaces there may either
be no surveillance services provided at all or none below certain flight levels/altitudes given current radar line of sight limitations. Examples are the Burnett Basin area of Queensland, Australia and Alaska, USA. Significant safety benefits will be provided to both pilots and air navigation service providers through the availability of ADS-B. These benefits include:
4
Provision of ‘radar-like’ separation, navigation and advisory services available in areas where it is not provided today.
4
More accurate traffic information available to both ATC and aircrew.
4
The early visibility of aircraft therefore enhancing the situational awareness of the controller.
4
Availability of user preferred tracks and better access to optimum levels as compared to procedural control.
4
Reduction in delays for aircraft transitioning from un-controller to controlled airspace.
4
Safety improvement brought about by an expansion of the safety net functionalities of radar surveillance airspace (e.g. STCA, MSAW, etc) to airspace where radar is not available.
4 Reduced cockpit workload by negating pilot position reporting.
Operational Use of ADS-B In Non Radar Airspace
Generic Design Safety Case
3.2 ADS B System Description
A simple, The ADS-B based surveillance system basically comprises of aircraft
reliable system fitted with an ADS-B transponder broadcasting its state vector and related information at a pre-defined rate (typically once every second). The broadcast message will as a minimum, include:
4
aircraft identification
4
positional data
4
altitude
4
velocity vectors
4 positional integrity information A series of ground receivers positioned at appropriate locations, receive this broadcast message and then forward it to the automated ground system for processing and display to controllers. The diagram below provides an overview of typical surveillance systems used in radar and non-radar airspace.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址:Operational Use of ADS-B In Non Radar Airspace Generic Desig(2)