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:
“And you’re too fired up to go to sleep, you sit at the kitchen table. It’s really late, it’s really quiet, you’re tired. Don’t wanna go to bed, though. Going to bed means this was the day. This Feb. 12, this Aug. 3, this Nov. 20 is over and you’re tired and you made some money but it didn’t happen, nothing happened. You got through it and a whole day of your life is over. And all it is—is time to go to bed.”
—Claudia Shear, U.S. author. New York Times, p. A21 (September 29, 1993)
“To keep up even a worthwhile tradition means vitiating the idea behind it which must necessarily be in a constant state of evolution: it is mad to try to express new feelings in a “mummified” form.”
—Alfred Jarry (1873–1907)