The ISA
- defines a standard atmosphere model.
- is referenced from the equator.
- is taken from 45 degrees latitude.
Explanation
The International Standard Atmosphere is referenced to conditions at 45 degrees latitude, giving the agreed baseline of 15 degrees C, 1013.25 hPa and a 1.98 degrees C per 1000 ft lapse rate at mean sea level. It is not referenced from the equator, where surface conditions are warmer, and it is a fixed standard rather than the live atmosphere.
Kaszimi asking:
can someone explain?
Community Comments (1)
A
Alex772 Posts: 2 17.04.2026 / 00:05
I think A. defines a standard atmosphere model.
it is correct.
it is correct.
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