Questions tagged [ils]

An instrument landing system (ILS) is a ground-based instrument approach system that provides precision guidance to an aircraft approaching and landing on a runway.

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Diversions because of fog: What are the reasons?

It's fog season again around my local airport MUC (EDDM), and I have noticed a number of diversions recently. Some planes were holding a bit before attempting to land, performed a go around and then ...
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835 views

How to calculate DDM in a ILS dual frequency system?

I'm working in a project where I have to process ILS baseband signals. I have no problem obtaining DDM value from single frequency signals, nor the individual components of a dual frequency signal (...
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What is the difference in purpose of the 1:40 Obstacle Identification Surface and the 1:50 clearance plane for an ILS glideslope?

I have found references to the Obstacle Identification Surface (OIS), which is approximately a 152ft/NM slope from the end of the runway (1.43 degrees, 1:40 rise/run) and a 1:50 clearance plane noted ...
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What is considered to be a approved deviation in an ILS beam during a CAT3 approach?

For category 3 approaches, the airport has to transition to LVP mode. In this mode- the holding points are taken back a little bit and the runway surroundings are clear. My question is- Is there a ...
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Can you identify this ILS/VOR antenna?

I'm looking for an ILS/VOR cheap and lightweight antenna. I can see there are several models (p.e. aircraftspruce catalog) but the following one drew my attention: All I know is it's being used by a ...
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Why is my Garmin GFC 700 wandering a lot laterally on an ILS approach?

I've noticed that my Garmin GFC 700 autopilot is 'hunting' on ILS approaches. To be absolutely clear, I mean an approach using a localizer with glideslope. It is rock solid on RNAV, GPS, and other ...