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4 votes
Accepted

What are the modulation parameters of a DME?

DME principle Source. The interrogator sends a pair of pulses, the DME transponder sends back identical pulses after a fixed delay of 50 μs for X channels, 56 μs for Y channels. The interrogator is ...
mins's user avatar
  • 74.7k
2 votes

Timing not authorized for defining the MAPt

Per TERPS 2-9-8(c), this can happen when there is excessive fix error on the PFAF (precise final approach fix) and there are obstacles on the missed approach segment. The fix error on the PFAF is not ...
Chris's user avatar
  • 16k
2 votes

Timing not authorized for defining the MAPt

There are two cases for this mention to be added: The MAPt is collocated with a facility or a fix, there is no reason to use a timing from the FAF to identify the MAPt. This case is the one ...
mins's user avatar
  • 74.7k
1 vote

An Aircraft is a flight level 150 the DME is at sea level find maximum and minimum range?

Aside from the issues others have pointed out in the comments, the method of determining the minimum DME range display is straightforward. Since DME measures slant range, the minimum will be observed ...
Gerry's user avatar
  • 20k

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