Originally Posted by
CargoDane
Depends on the GPS and how many satellites it can see. So the higher you are, the farther away the horizon, and the better the altitude position is.
Not all planes use radar altimeters or fly under a height were radar altimeters are useful.
No, it’s not very good for elevation.
a bit old:
Altitude Accuracy
The USGS says cheap units are not accurate for elevation
https://water.usgs.gov/osw/gps/
And we are talking about the very small GPS devices people use on bicycles.
Last edited by njkayaker; 11-06-20 at 02:55 PM.