Understanding pressure altitude and GPS altitude in aviation apps
iPad Pilot News
AUGUST 20, 2024
Airspeed and altitude differences Consider speed first. The panel in your airplane shows indicated airspeed (IAS, derived from the pitot tube on the wing), while the iPad shows groundspeed (derived from the GPS in your ADS-B receiver or iPad). Here’s a somewhat geeky dive into the details. Confused yet?
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