Techniques were developed and applied in making trade-off evaluations of the overall synchronization effectiveness of various levels of airborne vs ground-based hierarchal time relaying equippage. It is shown that the number of ground-based master stations required to supply a desired level of synchronization coverage to all aircraft (hierarchal and non-hierarchal), increases rapidly as the number of hierarchal aircraft is diminished. Trade-off studies were made of the master station site selection algorithms. It was shown that the priority algorithm is very near optimum. However, choices of alternate sets of sites (such as air traffic hubs) can be used to obtain operational or economic advantages with only slight reduction in overall effectiveness. Analytic and computational processes developed in Phases I and II were extended to evaluate the effects of atypical operations: master station outages, reduction in hierarchal support due to airline outage and weather. In all cases, hierarchal interconnection provided a high degree of redundancy and the overall system exhibited little loss in effectiveness under abnormal conditions. NTSB records of aircraft collisions indicated that a high level of coverage could be supplied by five master stations complemented by larger aircarrier equipped with hierarchal equipment. (Author)


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Synchronization Station Location Study - Tradeoff Phase


    Contributors:
    J. M. Holt (author) / F. D. Watson (author)

    Publication date :

    1974


    Size :

    75 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Design-Tradeoff Model For Space Station

    Chamberlain, Robert G. / Smith, Jeffrey L. / Borden, Chester S. et al. | NTRS | 1990


    Checkout system tradeoff study

    Miller, H. F. | NTRS | 1967


    Man-machine tradeoff study

    Feinberg, A. / Zimmerman, W. F. | NTRS | 1985


    Tradeoff of EVA and FTS for Space Station servicing

    Malone, T.B. / Permenter, K.E. | Tema Archive | 1989