standard atmosphere

noun

: an arbitrary ideal set of atmospheric conditions (as used in calculations of aircraft performance)

specifically : the international standard specifying a temperature of 15° C and 760 millimeters pressure at sea level with a vertical temperature gradient of −6.5° C per kilometer up to 11 kilometers altitude and uniform temperature of −56.5° C above that level

: atmosphere sense 5

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“Standard atmosphere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/standard%20atmosphere. Accessed 3 Dec. 2024.

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