How to calculate ILS accuracy? example - how to calculate vertical and horizontal ILS accuracy on runway threshold?

How to calculate ILS accuracy? example - how to calculate vertical and horizontal ILS accuracy on runway threshold?

Does this recent AVSIM thread help you? Distance From Localizer CenterlineDon't know if it was your intention or not (ie, your display name), but I wouldn't classify this as a gps question.Hope it helps,Bob

Does this recent AVSIM thread help you? Distance From Localizer CenterlineDon't know if it was your intention or not (ie, your display name), but I wouldn't classify this as a gps question.Hope it helps,Bob

My dispaly name is gpsquestion because next question will about how to calculate GLS system accuracy? :) Maybe you can help me because i dunno how this recent topic Distance From Localizer Centerline will help me? i need to calculate horizontal ( lateral) and vertical accuracy , not distance or something else.

Well, you will be "stuck" with that username here for as long as you remain a member... :Thinking:I'm not sure why you're asking about "calculating accuracy" because everything regarding that is preset in the core simulator engine, and is not user adjustable... :(

For what it's worth, according to the FSX SDK there are the following system variables:NAV GSI:index Glideslope needle deflection (+/- 119). Note that this provides only 8 bit precision, whereas NAV GLIDE SLOPE ERROR provides 32 bit floating point precision. NAV GLIDE SLOPE ERROR:index Difference between current position and glideslope angle. Note that this provides 32 bit floating point precision, rather than the 8 bit integer precision of NAV GSI.