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:
“You all talk like somebody else made these laws and Pharaoh don’t know nothing about ‘em. He makes ‘em his own self and he’s glad when we come tell him they hurt. why, that’s a whole lot of pleasure to him, to be making up laws all the time and to have a crowd like us around handy to pass all his mean ones on. Why, that’s a whole everything under the sun! Next thing you know he’ll be saying cats can’t have kittens.”
—Zora Neale Hurston (1891–1960)
“Genius detects through the fly, through the caterpillar, through the grub, through the egg, the constant individual; through countless individuals the fixed species; through many species the genus; through all genera the steadfast type; through all the kingdoms of organized life the eternal unity. Nature is a mutable cloud which is always and never the same.”
—Ralph Waldo Emerson (1803–1882)