A New Threat Detection Criterion for Airborne Collision Avoidance Systems

1990 ◽  
Vol 43 (03) ◽  
pp. 391-403 ◽  
Author(s):  
R. L. Ford ◽  
D. L. Powell
Keyword(s):  
Experimental Evidence ◽  
Collision Avoidance ◽  
Air Transport ◽  
Threat Detection ◽  
Detection Criterion ◽  
Collision Avoidance System

A new threat detection criterion is described which provides a better match to the requirements than the well-known modified tau criterion for a civil air transport collision avoidance system. Experimental evidence is given to show that it also reduces the number of undesirable alerts.

STCA, TCAS, Airproxes and Collision Risk

2005 ◽  
Vol 58 (3) ◽  
pp. 389-404 ◽  
Author(s):  
Peter Brooker
Keyword(s):  
Collision Avoidance ◽  
Air Transport ◽  
Collision Risk ◽  
Short Term ◽  
Transport Aircraft ◽  
Close Encounters ◽  
Data Source ◽  
Collision Avoidance System

The focus here is on the performance of and interaction between the Traffic Alert and Collision Avoidance System (TCAS) and the controller's short-term conflict alert (STCA) system. The data source used is UK Airprox Board Reports of close encounters between aircraft, and the focus is on commercial air transport aircraft using UK controlled airspace with a radar service. Do the systems work well together? Are controllers surprised when they find out that a pilot has received a TCAS resolution advisory? What do TCAS and STCA events say about collision risk? Generally, the systems seem to work together well. On most occasions, controllers are not surprised by TCAS advisories: either they have detected the problem themselves or STCA has alerted them to it. The statistically expected rate of future mid-air collisions is estimated by extrapolation of Airprox closest encounter distances.

scholarly journals Airplane positioning using airborne collision avoidance system data

2020 ◽  
Vol 164 ◽  
pp. 03050
Author(s):  
Volodymur Kharchenko ◽  
Ivan Ostroumov ◽  
Nataliia Kuzmenko ◽  
Arkadiy Larionov
Keyword(s):  
Collision Avoidance ◽  
System Development ◽  
Air Traffic ◽  
Air Transport ◽  
Traffic Data ◽  
Traffic Capacity ◽  
Angular Measurements ◽  
System Data ◽  
Collision Avoidance System ◽  
And Performance

Mid-air collision is an important problem of modern air transport system. Development of Airborne Collision Avoidance System (ACAS) is grounded on safety criteria in order to support air traffic capacity and equipment. In research, we study the possibility and performance of airplane positioning by data accumulated in ACAS. ACAS surveillance equipment supports accurate range and poor angular measurements of airspace user’s data. An approach is based on a fusion of surveillance data with airplanes locations obtained from decoded Automatic Depended Surveillance-Broadcast messages. Performance of positioning approach is considered in more detail. An error of positioning in the horizontal plane is estimated in relation with uncertainty of airspace users’ location. Numerical demonstration with a live air traffic data indicates poor positioning accuracy in comparison with primary positioning system on-board of airplane and accuracy dependence from geometry and capacity of air traffic.

The Conflict Resolution Process for TCAS II and Some Simulation Results

1987 ◽  
Vol 40 (3) ◽  
pp. 283-303 ◽  
Author(s):  
R. L. Ford
Keyword(s):  
Conflict Resolution ◽  
Collision Avoidance ◽  
Computer Model ◽  
Fast Time ◽  
Threat Detection ◽  
Traffic Pattern ◽  
Simulation Results ◽  
Collision Avoidance System ◽  
Miss Distance ◽  
Warning Time

The paper is mainly concerned with the principles used by TCAS (Traffic alert and Collision Avoidance System) to resolve conflicts between airborne aircraft. It leans heavily on an earlier paper which describes the threat-detection process. The simulation results given were obtained using a fast-time computer model for random traffic and comprise statistics on miss distance, warning time, etc., for a simple traffic pattern.

Collision Avoidance in the Air

1969 ◽  
Vol 22 (3) ◽  
pp. 381-394
Author(s):  
I. M. Hunter
Keyword(s):  
Control Systems ◽  
Collision Avoidance ◽  
Air Transport ◽  
Time Frequency ◽  
Collision Avoidance System

This paper describes and attempts to assess the viability of the airborne collision-avoidance system based on time-frequency techniques which is proposed, for use within ground-based control systems, by the Air Transport Association of America.

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