[Paparazzi-devel] AGL and NavSetGroundReferenceHere()

[Martin P]

I use a flight plan with goround_alt=0 (derived from basic.xml).
After calling NavSetGroundReferenceHere(), I would expect that the AGL is 0. 
Instead, it is the altitude above sea level. The GPS mode is 3D and the AGL 
varies within 3 or 4 meters. 

Is this the way it should be? Should I set the ground_alt to the actual 
altitude?