- How does ILS (Instrument landing system) work? - Aviation Stack Exchange
How does ILS (Instrument landing system) work? I know it provides guidance to the runway by two signals, one modulated at 90 Hz, the other at 150 Hz, but how the airplane lock on those signals? Wh
- What is the difference between ILS and VOR DME?
The ILS has a glide slope providing vertical guidance A VOR approach does not have any vertical guidance (although with a VOR DME one can at least determine the exact point at which to start a CDFA (continuous descent final approach) and regularly crosscheck the altitude with the DME)
- How do I know which airports have ILS and for which runways?
Here is an example chart for KLAX ILS 25R approach In the top right, it says the runway, the airport, and the approach type (ILS or LOC) In the top left, it says the ILS frequency, and just to the right, the runway heading On the very bottom, there's a diagram of the glidepath It lists the FAF, which is a "X" symbol with wide edges
- ils - What are the differences between Cat I, Cat II, and Cat III as . . .
I understand that Cat I, II, and III ILS approaches have progressively smaller weather minimums However, I am asking about the aircraft themselves What are the differences between Cat levels as
- How to choose the right ILS when the runway has more than one?
I'm wondering how is the right choose when an runway has ILS x, Y, Z What should I consider in order to pick one of those for landing?
- ils - What is the behavior of false glideslope signals? - Aviation . . .
The glideslope system is an analog system, and as such, it's subject to aliasing, resonances, heterodyning, and eight other technical terms I pulled out of my ass Maybe a diagram will help: false glide slopes In plain English, above the "real" glideslope, there are false glide slopes caused by your equipment locking onto the wrong phase of the signals If you lock onto the wrong lobe, it will
- ils - How are the frequency pairings for localizer and glideslope . . .
Attachment C of Annex 10, (2 6 Deployment of ILS frequencies) provides some details about this selection: 2 6 5 In general, when international use of ILS systems is confined to the pairings listed in Chapter 3, 3 1 6 1 1, the criteria are such that, provided they are met for the localizer element, the glide path element is automatically covered
- What is the difference between the ILS Critical Area and the ILS . . .
The ILS critical area is an area of defined dimensions about the localizer and glide path antennas where vehicles, including aircraft, are excluded during all ILS operations The critical area is protected because the presence of vehicles and or aircraft inside its boundaries will cause unacceptable disturbance to the ILS signal-in-space vs
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