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Paper 5 -- Potential Benefits Of A Time-Based Separation Procedure To Maintain The Arrival Capacity Of An Airport In Strong Head-Wind Conditions

This paper describes a different approach to separating aircraft during the final approach phase. It is based on the fact that, under strong head-wind conditions (>15kt.), the ground speed of the aircraft is reduced and so there is a loss of runway capacity. As a consequence of this, each aircraft needs more time to fly a given separation distance at the runway threshold. Under headwind conditions, the actual distance-based separation procedure may thus be not fully satisfactory. Moreover, according to current characterisation studies of wake vortices, which are the main hazards limiting capacity, the actual distance separation thresholds have been proved to be too conservative under strong wind conditions. We thus propose to replace the actual distance-based separations by time-based separations. Without reducing safety, such a process could maintain and increase runway capacity in a shorter term than the wake vortex advisory systems that will require more technology before they can be implemented. Let us note that both tools should be used anyway to get optimal and safe separations in the future.
Theme: Airport Management
Posted by: Elsa Freville / Other authors: Jean-Pierre Nicolaon, Antoine Vidal, Peter Crick
Note: Unset Received On Dec 20, 2005

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