Hi rudderrudderrat,
Thanks for your reply which was most helpful. In your ALC example the treshold height of 50 ft and the glideslope of 3 degrees result in the glideslope/runway intersection being further from the threshold on a downslope runway.
Originally Posted by rrr
The converse would be true if you landed on the reciprocal runway and crossed the threshold at 50 feet.
That's logical, isn't it? Therefore it is perhaps worth repeating:
Originally Posted by rrr
It would be interesting to learn from the OP what the difference in the published "LDA" and "Distance beyond the Glide Slope" was for his 2,000m airport.