A time constant is the amount of time it takes for a meteorological sensor to respond to a rapid change in a measurand until it is measuring values within the accuracy tolerance usually expected of the sensor.
This most often applies to measurements of temperature, dewpoint temperature, humidity and air pressure. Radiosondes are especially affected due to their rapid increase in altitude.
Famous quotes containing the words time and/or constant:
“Gather ye rosebuds while ye may:
Old Time is still a-flying;
And this same flower that smiles today,
Tomorrow will be dying.”
—Robert Herrick (1591–1674)
“Liberalism, austere in political trifles, has learned ever more artfully to unite a constant protest against the government with a constant submission to it.”
—Alexander Herzen (1812–1870)