In secondary radar system pulses transmitted from ground, trigger apparatus in aircraft which sends back coded reply; code may be used for conventional control procedures, or for automatic tracking of aircraft without use of computer; information is given on "Secar " system developed jointly by Marconi Co Ltd and Compagnie Francaise Thomson-Houston; interrogating pulses from ground are sent on 1030 Mc and aircraft transponders reply on 1090 Mc; there are four civil and three military modes, but mode which establishes identity is common to both systems.


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    Title :

    Secondary radar system


    Additional title:

    Engineer


    Published in:

    Engineer ; 219 , n 5697


    Publication date :

    1965


    Size :

    2 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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