ICAO defines an International Standard Atmosphere ( also known as ICAO Standard Atmosphere ), a model of the standard variation of pressure, temperature, density, and viscosity with altitude in the Earth's atmosphere.
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When flying at sea level under International Standard Atmosphere conditions ( 15 �C, 1013 hPa, 0 % humidity ) calibrated airspeed is the same as equivalent airspeed ( EAS ) and true airspeed ( TAS ).
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The nominal net thrust quoted for a jet engine usually refers to the Sea Level Static ( SLS ) condition, either for the International Standard Atmosphere ( ISA ) or a hot day condition ( e . g.
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Because the temperature of the atmosphere generally decreases with altitude ( until the tropopause ), the speed of sound also decreases with altitude . ( See the International Standard Atmosphere for more on temperature as a function of altitude .)
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The ICAO defines the International Standard Atmosphere ( also known as ICAO Standard Atmosphere ), which is the model of the standard variation of pressure, temperature, density, and viscosity with elevation / altitude in the Earth's atmosphere.
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The ICAO defines the International Standard Atmosphere ( also known as ICAO Standard Atmosphere ), which is the model of the standard variation of pressure, temperature, density, and viscosity with elevation / altitude in the Earth's atmosphere.
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For instance, precise measurements show that the boiling point of VSMOW water under one standard atmosphere of pressure is actually 373.1339 K ( 99.9839 �C ) when adhering " strictly " to the two-point definition of thermodynamic temperature.
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I wanted to add a second converted unit; the article previously had " . . . between 5 and 10 standard atmospheres ( 500 and 1, 000 kPa ) ", using the markup " convert | 5 | and | 10 | atm | sigfig = 1 ".
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In contrast the LM-105 designer Lutz M�ller originally calculated an optimistic G1 BC of H " 0.93 and a supersonic range of H " at a muzzle velocity of under International Standard Atmosphere sea level conditions ( air density ? = 1.225 kg / m 3 ).
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Though the M76 fires its bullets at a relatively modest muzzle velocity, the 8?7mm IS cartridge loaded with aerodynamically efficient military sS ball bullets still offers a supersonic reach of H " under ICAO Standard Atmosphere conditions at sea level ( air density ? = 1.225 kg / m?).