![]() ![]() The local airport provides you with a "corrected" barometric pressure of 29.65. Use known O 2 saturation tables to determine the saturation point.If it is corrected, you need to UNcorrect it,.Ask if their data is "corrected" (to sea level).or call a local airport or radio station.If you are using an aneroid barometer (typically have a tightly coiled spring), make sure it has been adjusted to read true uncorrected barometric pressure. Obtain barometric pressure directly from your own mercury barometer.To determine true, uncorrected barometric pressure: Additionally, virtually all aviation uses pressure altimeters to determine where the ground is. Barometric pressures are typically similar for a very large regional area, unless a storm is approaching, but there are pressure differences based on altitude, which can change dramatically over a very small distance. ![]() Why is this? For one thing, it's a means of standardizing data. Typically, any barometric pressure measurement that you hear (radio, TV) represents a value that has been corrected to a value relative to sea level. ![]()
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