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Accurate ILS And MLS Performance Evaluation In Presence Of Site Errors.

Mahapatra, Pravas R and Poulose, MM (1989) Accurate ILS And MLS Performance Evaluation In Presence Of Site Errors. In: IEEE 1989 National Aerospace and Electronics Conference. NAECON 1989, 22-26 May, Dayton,OH, Vol.1, 167-174.


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A powerful and versatile analytical approach is outlined for performing the site evaluation of Instrument Landing Systems (ILS) and Microwave Landing Systems (MLS) without resorting to the current experimental methods. The problem is treated as one of scattering, using a ray-theoretic approach. A multiwedge model of the terrain ahead of the antenna assembly is generated from standard survey data and an exact ray tracing procedure is evolved to trace all the rays between the antenna elements and approaching aircraft. The power of the current uniform diffraction theory (UTD) to evaluate scattered fields from wedges is extended to include the impedance and roughness of the wedge and the theory is applied to the multiwedge terrain model for evaluating the field. The results are reduced to a form compatible with ICAO-specified tests and compared with experimental data from real airports.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 1989 IEEE : Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 30 May 2006
Last Modified: 19 Sep 2010 04:27
URI: http://eprints.iisc.ac.in/id/eprint/6976

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