Originally Posted by
ZG862
p.s. Unless you're flying towards me
, I think you may have got left and right reversed. As you point out, my calculation uses ISA (right) rather than reality.
Just wanted to say, that you inserted the "altitude" (geographic elevation) from the left leg into the formula of the right leg
.
The graphic is only stolen from the web. It misses which sea level is on the earths geoid (left) and which is virtual by calculation of the standard atmosphere (right). Only at an ARP at sea level they would have to be the same.