On-board 4D guidance systems, which predict and control the touchdown time of an aircraft to an accuracy of a few seconds throughout the descent, were developed and demonstrated in several flight test programs. However, in addition to refinements of the on board system, two important issues still need to be considered. First, in order to make effective use of these on-board systems, it is necessary to understand and develop the interactions of the airborne and air traffic control (ATC) system in the proposed advanced environment. Unless the total system is understood, the advanced on-board system may prove unusable from an ATC standpoint. Second, in planning for a future system in which all aircraft are 4D equipped, it is necessary to confront the transition situation in which some percentage of traffic must still be handled by conventional means. In terms of 4D, this means that some traffic must still be given radar vectors and speed clearances (that is, be spaced by conventional distance separation techniques), while the 4D-equipped aircraft need to be issued time assignments. These apparent differences are reconciled and efficient ATC operation is developed.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Mixing 4D-Equipped and Unequipped Aircraft in the Terminal Area


    Contributors:
    Tobias, L. (author) / Erzberger, H. (author) / Lee, H. Q. (author) / Obrien, P. J. (author)


    Publication date :

    1984-03-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Mixing 4D equipped and unequipped aircraft in the terminal area

    Tobias, L. / Erzberger, H. / Lee, H. Q. et al. | NTRS | 1983


    Mixing four-dimensional equipped and unequipped aircraft in the terminal area

    Tobias, L. / Erzberger, H. / Lee, H. Q. et al. | NTRS | 1985




    Fixed wing flight vehicle unequipped aileron

    LEE KI SEONG | European Patent Office | 2017

    Free access