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:
“While they were there, the time came for her to deliver her child. And she gave birth to her firstborn son and wrapped him in bands of cloth, and laid him in a manger, because there was no place for them in the inn.”
—Bible: New Testament, Luke 2:6,7.
“It is useless to contend with the irresistible power of Time, which goes on continually creating by a process of constant destruction.”
—E.T.A.W. (Ernst Theodor Amadeus Wilhelm)