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:
“And so, standing before the aforesaid officiator, the two swore that at every other time of their lives till death took them, they would assuredly believe, feel, and desire precisely as they had believed, felt, and desired during the few preceding weeks. What was as remarkable as the undertaking itself was the fact that nobody seemed at all surprised at what they swore.”
—Thomas Hardy (1840–1928)
“If ever thou shalt love,
In the sweet pangs of it remember me;
For such as I am, all true lovers are,
Unstaid and skittish in all motions else
Save in the constant image of the creature
That is beloved.”
—William Shakespeare (1564–1616)