Potential airborne conflicts or near-conflicts (jointly referred to as aircraft proximities) are an important National Airspace System activity indicator by itself and also as a component of the dynamic density metric. Proximity analysis in four dimensions using historical data (specifically, Enhanced Traffic Management System files) presents a number of challenges. If we use actual flight tracks, they have conflict resolution actions by air traffic control already embedded into them. If we use flight-plans-as-filed, the time component of the 4D tracks needs to be constructed correctly. To simply use the filed departure time or the estimated/actual departure time as the start time for such tracks would distort the timing and location of the potential airborne conflicts because of the wide variance of out-to-off times for different airports and times of the day. In this paper, we propose a method that uses a combination of actual and planned tracks resulting in a more realistic timing of potential conflicts. An efficient scanning algorithm for computing 4D proximities is introduced. The results are displayed on a hexagonal grid over the National Airspace System. The method is also compared with the output from fast-time simulations using TAAM (Total Airport & Airspace Modeler), a well-known air traffic simulation model.


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    Title :

    Computation and analysis of aircraft proximities in the NAS using ETMS data


    Contributors:
    Klein, A. (author) / Hafner, F. (author)

    Published in:

    Publication date :

    2005-01-01


    Size :

    666709 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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