Accession Number : ADA138228
Title : Instrument Landing System Critical Area Studies.
Descriptive Note : Final rept.,
Corporate Author : OHIO UNIV ATHENS AVIONICS ENGINEERING CENTER
Personal Author(s) : McFarland,R H ; Longworth,J D
PDF Url : ADA138228
Report Date : Nov 1983
Pagination or Media Count : 197
Abstract : Theoretical and experimental studies have been performed to determine the perturbational effects on glide slope and localizer course structures. The effects are those produced by aircraft parked in front of the transmitting antennas. Contours are given which indicate the maximum path irregularity for a particular ILS zone given a specific size aircraft, its location and orientation. From these, critical - area designations for particular airdromes can be determined. Special concerns have been given to the effects of the Boeing 747 on the performance of the Cat III, two-frequency localizer and on the 8- and 14- element, single-frequency systems. Also, effects of general aviation type aircraft on the null-reference glide slope have been calculated and measured.
Descriptors : *Microwave landing systems, Radio reception, Glide path systems, Radio transmission, Anomalies, Radio signals, Scattering, Radio interference, Glide slope, Distortion, Perturbations, Aircraft, Ground level
Subject Categories : Air Navigation and Guidance
Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE