standard atmospheric conditions/standard atmosphere

The internationally accepted conditions of the atmosphere to allow all measurements to be brought to the same norms. The standard atmospheric conditions at sea level are pressure: 29.92 in of mercury or 1013.2 hectopascals; temperature: 15°C; acceleration due to gravity: 32.174 ft/s2 or 9.809 m/s2 ; air density: 0.002378 slugs/ft3 or 1.225 kg/m3 ; and speed of sound: 761 miles/h, 1116.4 ft/s, 1225.35 km/h, or 34,046.16 cm/s. The temperature lapse rate is assumed to be constant at the rate of 1.98°C per 1000 ft (6.5°C per kilometer) up to a height of 36,090 ft (11 km), above which it remains constant at -56.5°C. See ICAN Atmosphere.

Aviation dictionary. 2014.

Look at other dictionaries:

  • Standard atmosphere — can refer to:* A standard reference value for air pressure: ** Atmosphere (unit), an approximation of the value at sea level ** Atmospheric pressure, other reference values * A model of how atmospheric pressure varies with altitude: ** The U.S.… …   Wikipedia

  • standard atmosphere — noun a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade • Syn: ↑atmosphere, ↑atm, ↑standard pressure • Hypernyms: ↑pressure unit • Hyponyms: ↑STP, ↑ …   Useful english dictionary

  • standard atmosphere — 1. an arbitrarily determined vertical distribution of atmospheric pressure, temperature, and density, assumed to have physical constants and conforming to parametric equations, used for calculations in ballistics, the design of pressure… …   Universalium

  • standard atmosphere — /stændəd ˈætməsfɪə/ (say standuhd atmuhsfear) noun 1. Physics any hypothetical atmosphere the physical properties of which are given arbitrary values approximating to mean conditions, for such purposes as comparing the performance of aircraft,… …   Australian English dictionary

  • International Standard Atmosphere — The International Standard Atmosphere (ISA) is an atmospheric model of how the pressure, temperature, density, and viscosity of the Earth s atmosphere change over a wide range of altitudes. It consists of tables of values at various altitudes,… …   Wikipedia

  • U.S. Standard Atmosphere — The U.S. Standard Atmosphere is a series of models that define values for atmospheric temperature, density, pressure and other properties over a wide range of altitudes. The first model, based on an existing international standard, was published… …   Wikipedia

  • Atmosphere normalisee — Atmosphère normalisée Pour les articles homonymes, voir condition. L atmosphère normalisée définit des « conditions normales de température et de pression » (CNTP) qui permettent de s affranchir des variations de ces deux paramètres… …   Wikipédia en Français

  • Atmosphère type OACI — Atmosphère normalisée Pour les articles homonymes, voir condition. L atmosphère normalisée définit des « conditions normales de température et de pression » (CNTP) qui permettent de s affranchir des variations de ces deux paramètres… …   Wikipédia en Français

  • Conditions ambiantes de température et de pression — Atmosphère normalisée Pour les articles homonymes, voir condition. L atmosphère normalisée définit des « conditions normales de température et de pression » (CNTP) qui permettent de s affranchir des variations de ces deux paramètres… …   Wikipédia en Français

  • Conditions naturelles de température et pression — Atmosphère normalisée Pour les articles homonymes, voir condition. L atmosphère normalisée définit des « conditions normales de température et de pression » (CNTP) qui permettent de s affranchir des variations de ces deux paramètres… …   Wikipédia en Français

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