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:
“Farewell deare flowers, sweetly your time ye spent,
Fit, while ye liv’d, for smell or ornament,
And after death for cures.
I follow straight without complaints or grief,
Since if my sent be good, I care not, if
It be as short as yours.”
—George Herbert (1593–1633)
“Love not me for comely grace,
For my pleasing eye or face,
Nor for any outward part:
No, nor for a constant heart!”
—Unknown. Love Not Me for Comely Grace (l. 1–4)