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:
“Miss U.S.A. is in the same graveyard that [Amanda Jones] the twelve-year-old is. Where the sixteen-year-old is. All the past selves. There comes a time when you have to bury those selves because you’ve grown into another one.”
—Amanda Theodosia Jones, U.S. beauty contest winner, Miss U.S.A., 1973. As quoted under the pseudonym “Emma Wright” in American Dreams, Prologue, by Studs Terkel (1980)
“In my Pantheon, Pan still reigns in his pristine glory, with his ruddy face, his flowing beard, and his shaggy body, his pipe and his crook, his nymph Echo, and his chosen daughter Iambe; for the great god Pan is not dead, as was rumored. No god ever dies. Perhaps of all the gods of New England and of ancient Greece, I am most constant at his shrine.”
—Henry David Thoreau (1817–1862)