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:
“I never understood exactly why people get engaged—The only time I ever did the most disastrous things happened—but I feel that there’s a great deal to be said for immediate matrimony always. If I once got started I’d probably have to become a mormon to cover my confusion. What I mean is that if he and she are crazy about each other it is sheer tempting God to stay apart, come what may. And if people arent crazy about each other being engaged wont help them.”
—John Dos Passos (1896–1970)
“Man, so long as he remains free, has no more constant and agonizing anxiety than find as quickly as possible someone to worship.”
—Feodor Dostoyevsky (1821–1881)