Barometric Compensation Algorithm

[skygizmo]

@obj

If what you want to know is height above MSL (or AGL, if you know the local terrain height) then a simpler approach for ADS-B equipped aircraft is to use the GNSS/GPS altitude, which is a geometric height above the ellipsoid and so is unaffected by pressure. (nb: you do need to adjust for the geoid height to get height AMSL, but that doesn’t vary a lot over smaller distances)

Yep. Just the MSL. I am not clear on if you are saying there is an option I can click that sill provide this info. Can you elaborate on what you mean by the ellipsoid?