An instrument landing system (ILS) is a system that works by sending radio waves downrange from the runway end, with aircraft that intercept it using the radio waves to guide them onto the runway.Click to see full answer. Beside this, what is instrument landing system in airport?An Instrument Landing System (ILS) is a highly accurate radio signal navigation aid consisting of two antennas which transmit signals to receivers in the aircraft cockpit—a glide path tower located next to the runway at the northern end and a localiser antenna at the southern end.Subsequently, question is, how much does an instrument landing system cost? The annual preventative maintenance cost for a single ILS can run as high as $25,000 and averages about $19,000 to $20,000. GPS landing systems promise lower maintenance cost, which is one reason why FAA hopes to replace ILS. Also, how does a glideslope work? A glide slope station uses an antenna array sited to one side of the runway touchdown zone. The GS signal is transmitted on a carrier signal using a technique similar to that for the localizer. The centre of the glide slope signal is arranged to define a glide path of approximately 3° above horizontal (ground level).How many ground based radio transmitters are required for an instrument landing system? two
