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:
“The daily arguments over putting away the toys or practicing the piano defeat us so easily. We see them coming yet they frustrate us time and time again. In many cases, we are mothers and fathers who have managed budgets and unruly bosses and done difficult jobs well through sheer tenacity and dogged preparation. So why are we unable to persuade someone three feet tall to step into six inches of water at bathtime?”
—Cathy Rindner Tempelsman (20th century)
“It is useless to contend with the irresistible power of Time, which goes on continually creating by a process of constant destruction.”
—E.T.A.W. (Ernst Theodor Amadeus Wilhelm)