The characteristics of a master time and master-time dissemination subsystem for a collision avoidance system acceptable to the Air Transport Association of America are investigated. Selection of a time scale, a ground-station timing standard, and a synchronization technique are discussed. The conclusions are that a uniform time scale is ideal for the application, that a minimum of four cesium-beam standards are needed at each ground station, and that portable-clock synchronization is the only synchronization technique feasible at the present time. Considerations that suggest use of a nonuniform time scale are noted, and means of minimizing the adverse effects of the offsets necessitated by such an approach are described. Both single-master and weighted-average implementations of the time scale are discussed.


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    Title :

    Master Timing of CAS Ground Stations


    Contributors:


    Publication date :

    1968-03-01


    Size :

    2087360 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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