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)

Definition

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

References

Airplane Flying Handbook · Federal Aviation Administration · 2021