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:
“We went to Mannheim and attended a shivaree—otherwise an opera—the one called “Lohengrin.” The banging and slamming and booming and crashing were something beyond belief. The racking and pitiless pain of it remains stored up in my memory alongside the memory of the time that I had my teeth fixed.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)
“Love can no more continue without a constant motion than fire can; and when once you take hope and fear away, you take from it its very life and being.”
—François, Duc De La Rochefoucauld (1613–1680)