Accession Number : AD0615419

Title :   ILS FLIGHT CHECK SYSTEM.

Descriptive Note : Final rept.,

Corporate Author : AIRBORNE INSTRUMENTS LAB DEER PARK NY

Personal Author(s) : Creber, D. J.

Report Date : JAN 1965

Pagination or Media Count : 96

Abstract : 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.

Descriptors :   *INSTRUMENT LANDINGS, FEASIBILITY STUDIES, OPTICAL EQUIPMENT, ELECTRONIC EQUIPMENT.

Distribution Statement : APPROVED FOR PUBLIC RELEASE