standard atmospheric conditions

standard atmospheric conditions

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.
References in periodicals archive ?
performance data may be presented on the basis of standard atmospheric conditions, pressure altitude, or density altitude.
The award-winning collaboration employed a non-vacuum technique developed at NREL and licensed by HelioVolt to precisely apply liquid precursors under standard atmospheric conditions onto a printing plate and substrate which can be made from various building materials including glass, metals, roofing materials, and plastics.

Full browser ?