System feasibility checks, prior to NAFEC tests, on the Guide Light System show that it has high resolution and a reasonably good range and, depending on the results of accuracy tests, appears to be a promising technique for flight checking the accuracy of ILS installations. On a bright sunny day, the Guide Light System operating range was found to be about 3-1/2 nm; on a clear night, the range was about 5-1/2 nm. Ground tests showed that the course shift as a function of range was negligible. The Guide Light System that was designed and constructed consists of a ground station and an airborne flight-check receiver. At the ground station, the light from a 1-kilowatt tungsten-filament source is split into two light bands (infrared and visible) and modulated by a rotating drum. The flight-check aircraft receiver demodulates the light beams and, by measuring the phase angle between the demodulated audio signals, determines the in-space angular location of the aircraft. Angular information is contained in a 0.6-degree-wide beam symmetrically spaced about the center-line.


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    Title :

    ILS Flight Check System


    Contributors:

    Publication date :

    1965


    Size :

    2 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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