A survey of the instrument landing system glide path
Lauff, Bernard John
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The investigation of the operating characteristics of the glide path equipment of the Instrument Landing System was made in the eleven week period which comprises the Winter Term of the third year in the Electronics Engineering course of instruction at the U. S. Naval Postgraduate School at Annapolis, Maryland. The field work was done at the Federal Telecommunication Laboratory at the Westchester County Airport, White Plains, New York. There the author assisted Mr. Sidney Pickles in a series of air and ground tests on a glide path installation. The tests covered the period from January 3, 1949 to March 18,1949. The tests were made in an attempt to complete the theory of operation of a piece of equipment which has been in actual operation in all parts of the world for several years. The difficulty of making measurements on the glide path (the useful glide path lies almost entirely at distances above the ground which cannot be probed from the ground) and the inadequate equipments and techniques for making measurements at the glide path frequency has left several factors uninvestigated and the inter-relation of many factors open to considerable question. While Mr. Pickles and the author feel that their work has added to the knowledge of the theory of operation of the equipment they are convinced that the theory is still inadequate to explain some of the phenomena observed during the test period.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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