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:
“when this life is from the body fled,
To see it selfe in that eternall Glasse,
Where time doth end, and thoughts accuse the dead,
Where all to come, is one with all that was;
Then living men aske how he left his breath,
That while he lived never thought of death.”
—Fulke Greville (1554–1628)
“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)