standard atmosphere


Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.
Related to standard atmosphere: Standard atmospheric pressure

standard atmosphere

[′stan·dərd ′at·mə‚sfir]
(meteorology)
A hypothetical vertical distribution of atmospheric temperature, pressure, and density which is taken to be representative of the atmosphere for purposes of pressure altimeter calibrations, aircraft performance calculations, aircraft and missile design, and ballistic tables; the air is assumed to obey the perfect gas law and hydrostatic equation, which, taken together, relate temperature, pressure, and density variations in the vertical; it is further assumed that the air contains no water vapor, and that the acceleration of gravity does not change with height.
(physics)

standard atmosphere

A pressure equivalent to 14.7 lb per sq in. (1.01 × 106 dynes per sq cm).
References in periodicals archive ?
The standard temperature is the freezing point of water and the standard pressure is one standard atmosphere.
The coefficients for the Niell's functions (Niell, 1996) were obtained empirically using US Standard Atmosphere 1966 data while for the Isobaric Mapping Functions (IMF)--using NCEP (National Center for Environmental Prediction) numerical meteorological model (Niell, 2001).
The important thing to remember, however, is that this relationship is an estimate based on a model called the International Standard Atmosphere (ISA)--and this model is not always accurate.
Uptown's Monica Barrington says: "We find many leisure and business travellers preferring the personal ambience of one of our host homes to the standard atmosphere of most hotels.
The international standard atmosphere (ISA) is the model of the atmosphere used as a baseline for aircraft performance.

Full browser ?