Originally Posted by
DaveReidUK
Yes, although
AFAIK the altitudes on FR24 always come from Airborne Position messages, which in turn always contain baro alt.
They present both in the web UI, which they call Calibrated Altitude ( barometric ) and GPS Altitude. Edit: apparently this is only visible to Gold and Business subscribers. Sorry plebs
But I haven't dug into their export data to see if they provide both in the downloads. I'll have a look now.