FlightDetent, re calculating deviation in feet from dots above/below the glideslope and, "
Anybody care to do the math?"
I looked this up some time ago on PPRuNe when I was working on FDM Program determination of touchdown points to ensure the correctly-calculated distance from 50' to touchdown.
The matter was discussed, along with the mathematics, at:
http://www.pprune.org/questions/3622...ml#post4719685