Aviation Dictionary

International Standard Atmosphere (ISA)

Standard atmospheric conditions consisting of a temperature of 59 °F (15 °C), and a barometric pressure of 29.92 "Hg. (1013.2 mb) at sea level. ISA values can be calculated for various altitudes using a standard lapse r...

Dictionary Term

International Standard Atmosphere (ISA)

Definitions

Standard atmospheric conditions consisting of a temperature of 59 °F (15 °C), and a barometric pressure of 29.92 "Hg. (1013.2 mb) at sea level. ISA values can be calculated for various altitudes using a standard lapse rate of approximately 2 °C per 1
A model of standard variation of pressure and temperature.

References

Airplane Flying Handbook, Federal Aviation Administration, 2021
Instrument Flying Handbook, Federal Aviation Administration, 2014
Weight-Shift Control Aircraft Flying Handbook, Federal Aviation Administration, 2008