Abstract
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.
Highlights
An Airborne Collision Avoidance System (ACAS) is an automated air traffic monitoring system with the aim of finding potential conflicts between air space users in the air transport system and issuing pilot recommendations for their solution [1]
ACAS can be considered as an on-board sensor for measuring ranges to air traffic
Each airspace user is equipped with Automatic Dependent Surveillance-Broadcast (ADS-B) transponder that continuously transmits its location in airspace
Summary
An Airborne Collision Avoidance System (ACAS) is an automated air traffic monitoring system with the aim of finding potential conflicts between air space users in the air transport system and issuing pilot recommendations for their solution [1]. A safe solution of mid-air collisions is a primary task of an intelligent transport system [2]. ACAS surveillance equipment operates to secondary surveillance radars, providing accurate measurement of ranges to other airspace users. ACAS can be considered as an on-board sensor for measuring ranges to air traffic. ACAS II is a mandatory system for heavy airplanes [3], and ACAS I is included to the minimum equipment list of general aviation in many regions. ACAS II detects mid-air collision and generates a coordinated Resolution
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