Definition of Glideslope (GS)
The Glideslope (GS) is a vital component of the Instrument Landing System (ILS) used to guide airplanes to land on runway during low visibility conditions. It projects a precision radio beam upwards at an angle of about 3 degrees from the approach end of the instrument runway. The Glideslope provides vertical guidance to the aircraft on the final approach course to follow while making an ILS approach along the localizer path. By keeping the aircraft on a predetermined steady path and descent rate, the Glideslope ensures a safe and accurate landing during adverse weather scenarios, such as fog, haze, low-lying clouds, or nighttime. With unobstructed communication between the ground-based system and the aircraft, pilots receive precise altitude information and crucial data, making it easier to line up with the runway and prepare for touchdown. The Glideslope is typically located between 500 and 1000 feet from the runway threshold and maintains a signal coverage of more than five nautical miles. And therefore, it remains indispensable for smooth and efficient air traffic management worldwide.
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