Converts QNH (sea-level altimeter setting) to QFE (field elevation pressure)
for a given airfield elevation.
Uses the ISA standard temperature profile to compute the pressure gradient between
sea level and the airfield. On days with significant temperature deviation from ISA,
the actual gradient differs, introducing a small error. This is the industry-standard
approach and matches how real barometric altimeters perform the conversion.
Converts QNH (sea-level altimeter setting) to QFE (field elevation pressure) for a given airfield elevation.
Uses the ISA standard temperature profile to compute the pressure gradient between sea level and the airfield. On days with significant temperature deviation from ISA, the actual gradient differs, introducing a small error. This is the industry-standard approach and matches how real barometric altimeters perform the conversion.