"John Bell" writes:
Let me add two links to the discussion:
This is on problems with cold weather altimetry:
http://www.aircraftbuyer.com/learn/train06.htm
This is about the accuracy of unaided GPS altitude in the context of
vertical guidance, but it bears some relavence to the discussion of the
accuracy of GPS altitude:
http://www.bluecoat.org/reports/Graham_2001_RawGPS.pdf
Thanks -- those are good articles. The Nav Canada paper on non-WAAS
GPS VNAV (the Graham paper) is especially interesting.
All the best,
David