microwave landing system


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microwave landing system

[′mī·krə‚wāv ′land·iŋ ‚sis·təm]
(navigation)
A system of ground equipment which generates guidance beams at microwave frequencies for guiding aircraft to landings; it is intended to replace the present lower-frequency instrument landing system. Abbreviated MLS.

microwave landing system (MLS)

An instrument landing system operating in the microwave spectrum (5.0–5.25 GHz/15.4–15.7 GHz) that provides precision guidance in azimuth, elevation, and distance measurement to aircraft having compatible airborne equipment. There is no requirement of a localizer and a glide-slope as in an ILS (instrument landing system). An MLS allows approaches anywhere within its horizontal and vertical fan-shaped coverage area. It guides over a +/− 40° sector for landing and overshooting. It is useful for helicopters, short takeoff and landing (STOL) aircraft, and fixed-wing aircraft. The standard configuration of MLS ground equipment includes an azimuth station that provides an approach and back azimuth, an elevation station to provide an approach elevation, and precision distance-measuring equipment to indicate a continuous range of information on aircraft. On aeronautical charts, the availability of this facility is indicated by image.
References in periodicals archive ?
Known to the US Air Force as AN/TRN-45, Textron Systems' MMLS is a mobile microwave landing system designed for rapid deployment.
Each aircraft received two GNLU-920 receivers, as replacements for the traditional ILS receivers, with a single approach guidance system that can be configured for compatibility with ILS, Microwave Landing System and Global Positioning System landing systems.
The microwave landing systems provide precise elevation and azimuth guidance information necessary for aircraft carrier landings.
Efforts to develop a microwave landing systems seemed to hold promise yet led nowhere initially because the two primary customers, the military and the airlines, preferred different and incompatible systems.
The aircraft will be compatible with the Opats electro-optical landing system although, should a customer require, Ruag has the capability to adapt it for microwave landing systems. On the compatibility theme, the latest types of Ranger ground control systems (such as the ones used by Finland) will be able to monitor the new bird with a simple software upgrade.
A variety of navigation and guidance applications, including TACAN navigation and FAA microwave landing systems, employ solid-state power amplifiers.
* 1164-1215 MHz: DISTANCE MEASURING EQUIPMENT * 1215-1300 MNz: LONG-RANGE PRIMARY RADARS FOR EN-ROUTE SURVEILLANCE * 2700-3400 MHz: AIR TRAFFIC CONTROL RADAR SURVEILLANCE FUNCTIONS * 5091-5150 MNz: MICROWAVE LANDING SYSTEMS * 5150-5250 MHz:: MICROWAVE LANDING SYSTEMS * 5350-5470 MHz: INCLUDES AIRBORNE RADAR SYSTEMS.
Microwave Landing Systems Planned for Installation at 80 Canadian Airports

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