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:
“When I go into a museum and see the mummies wrapped in their linen bandages, I see that the lives of men began to need reform as long ago as when they walked the earth. I come out into the streets, and meet men who declare that the time is near at hand for the redemption of the race. But as men lived in Thebes, so do they live in Dunstable today.”
—Henry David Thoreau (1817–1862)
“A tart temper never mellows with age, and a sharp tongue is the only edged tool that grows keener with constant use.”
—Washington Irving (1783–1859)