What is known as the Instrument Landing System (ILS) consists of (1) “localizer” transmitters, located at the centerline of and off the ends of runways, which provide lateral guidance to aircraft approaching to land (2) “glide slope” transmitters located beside runways near the end of the runway over which the aircraft first passes in landing (the “threshold”), which provide vertical guidance and (3) marker beacons reporting progress along the glide-path to the pilot of the landing aircraft.Īll three, localizer, glide slope, and marker beacon transmitters, radiate continuous wave EM energy at radio frequencies. Loewy, in Encyclopedia of Physical Science and Technology (Third Edition), 2003 III.F Instrument Landing Systems Then, the aircraft positions are adjusted accordingly to bring it back to the positions of exact cancellation ( Parkinson et al. Once the aircraft deviates from this path, one of the components exceeds the other and there appears a nontrivial resultant value of the difference signal. The pair of signals is spatially separated in such a way that exact cancellations of the modulating signal happen only along the recommended path of the movement of the aircraft. This is done by comparing the modulation depth of the modulating signals within a particular pair through differencing. This signal is received by ILS receivers in the aircraft and is interpreted to obtain guidance information. Figure 1.9(a) and (b) illustrates the condition. A similar pair of signals is available in both lateral and vertical directions. Guidance is provided by transmitting a pair of amplitude-modulated signals from two spatially separated transmitters. The second, which gives vertical guidance, and hence restricts vertical deviation of the aircraft from the recommended path of descent, is called the glide slope or glide path. The first, which provides lateral guidance, restricting the aircraft approaching a runway to shift laterally from the recommended path, is called the localizer. Thus, an ILS consists of two independent subsystems. Microwave landing system - The NASA 737 research aircraft on the Wallops runway in 1987 with the Microwave Landing System equipment in the foreground.The ILS provides the aircraft with a recommended path it should follow so that it maintains its horizontal position at the center of the runway and the vertical position most appropriate for a smooth landing. Marker beacon - A marker beacon is a particular type of VHF radio beacon used in aviation, usually in conjunction with an instrument landing system (ILS), to give pilots a means to determine position along an established route to a destination such as a runway.… … Wikipedia the art or science of plotting, ascertaining, or directing the course of a ship, aircraft, or guided missile. Instrument landing system - The Instrument Landing System (ILS) is a ground based instrument approach system that provides precision guidance to an aircraft approaching a runway, using a combination of radio signals and, in many cases, high intensity lighting arrays to… … WikipediaĪutoland - In aviation, autoland describes a system that fully automates the landing phase of an aircraft s flight, with the human crew merely supervising the process.DescriptionAutoland systems were designed to make landing possible in visibility too poor… … Wikipedia Kaduna Airport - IATA: KAD – ICAO: DNKA … Wikipedia For more exhaustive lists, see the or the… … WikipediaĬleveland Hopkins International Airport - IATA: CLE – ICAO: KCLE – FAA LID: CLE … Wikipedia
List of accidents and incidents involving commercial aircraft - This list of accidents and incidents involving commercial aircraft is grouped by the years in which the accidents and incidents occurred. For an aircraft to approach the instrument runway from the end on which the… … Aviation dictionary Смотреть что такое "localizer antenna" в других словарях:Īndrew Alford - (5 August 1904 25 January 1992) was an American electrical engineer and inventor.Born in Samara, Russia Alford invented and developed antennas for radio navigation systems, now used for VHF omnidirectional range and instrument landing… … Wikipediaīack course - The course line along the extended centerline of a runway in the opposite direction to the front course, or the localizer course for an ILS (instrument landing system).
0 kommentar(er)
