Calculate the precise temperature-corrected barometric pressure. Our ASL Temperature Barometer Reading Correction Calculator adjusts observed readings, vital for meteorology, aviation, and precise atmospheric monitoring. Ensure accuracy by accounting for instrument temperature variations to standardize your measurements.
Formula:
The formula for temperature correction of a mercury barometer with a brass scale, adjusted to a standard 0°C (32°F) reference temperature, is:
Pcorrected = Pobserved × [1 - (αHg - βBrass) × Tobserved_°C]
Pcorrected: The barometric pressure reading corrected to 0°C.Pobserved: The observed barometric pressure reading from the instrument.αHg: The coefficient of cubical expansion of mercury (approximately 0.0001818 per °C).βBrass: The coefficient of linear expansion of the brass scale (approximately 0.0000189 per °C).Tobserved_°C: The observed instrument temperature in degrees Celsius. If input in Fahrenheit, it is converted to Celsius first for calculation.