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| | Standard temperature and pressure (Site not responding. Last check: 2007-11-06) |
 | | The Army Standard Metro atmosphere, now used only in ballistics, defines sea-level conditions as 29.5275 inHg of pressure (99.9916 kPa), 59°F (15°C), and 78% humidity. |
 | | The InternationalCivil Aviation Organisation (ICAO) defines the sea-level International Standard Atmosphere(ISA) as 101.325 kPa, 15°C and 0% humidity. |
 | | These values provide a reference for calculating various aircraftperformance figures, such as endurance, range, airspeed, and fuel consumption. |
| www.therfcc.org /standard-temperature-and-pressure-10235.html (190 words) |
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