ILS

ILS
ILS
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Description

Systems Interface is second to none in its delivery of turnkey Instrument Landing Systems. An Instrument Landing System (ILS system) is a ground-based radio navigation system giving pilots lateral and vertical guidance towards the runway when visual contact with the runway cannot be established. These pieces of equipment are crucial for airports as they increase the reliability of every landing, reduce the decision altitude (altitude at which the pilot either commits to the landing procedure or diverts) and ultimately ensure that the pilot can understand the runway no matter the conditions. How ILS Operates ILS works by beaming two radio transmissions of different frequencies up from the landing runway, one of 90 Hz and one of 150 Hz. A radio beacon called a localiser is normally built at the end of the runway with multiple pairs of directional antennas. Localisers are responsible for the horizontal guidance of the aircraft. On the aircraft, an ILS receiver interprets the information and reports which side the aeroplane is situated to allow the pilot to adjust accordingly. When both signals are overlapping, the aeroplane is flying perfectly down the centre of the course to the runway. A glideslope antenna provides vertical guidance and operates the same as a localiser which is turned on its side. It also uses 90 Hz and 150 Hz frequencies which are interpreted by the ILS receiver on an aircraft. Objects below 5,000 feet above ground level have the potential to reflect glideslope signals, which can create false glideslopes.

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