THE INTERIM STANDARD MICROWAVE LANDING SYSTEM

D. J. Toman

Peer Reviewed

Abstract:	Conceived as a bridge between the VHF/UHF ILS and the future international standard Microwave Landing System, ISMLS provides all the operational benefits of conventional ILS with few of the technical headaches. Several ISMLS installations are presently commissioned for public use serving in some cases at sites where site preparation costs for conventional ILS would have exceeded by far the total cost of the rest of the ISMLS installations in commission. These facilities are the world’s first public-use microwave landing systems. This paper describes the ISMLS, its signal format, how it copes with difficult siting problems and how it manages to bridge the gap between the existing VHF/UHF system and the future worldwide system, serving the immediate needs of the aviation community.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 25, Number 3
Pages:	298 - 309
Cite this article:	Toman, D. J., "THE INTERIM STANDARD MICROWAVE LANDING SYSTEM", NAVIGATION: Journal of The Institute of Navigation, Vol. 25, No. 3, Fall 1978, pp. 298-309.
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