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:
“A guide book is addressed to those who plan to follow the traveler, doing what he has done, but more selectively. A travel book, in its purest, is addressed to those who do not plan to follow the traveler at all, but who require the exotic or comic anomalies, wonders and scandals of the literary form romance which their own place or time cannot entirely supply.”
—Paul Fussell (b. 1924)
“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)