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:
“I know not how,
But I do find it cowardly and vile,
For fear of what might fall, so to prevent
The time of life—arming myself with patience
To stay the providence of some high powers
That govern us below.”
—William Shakespeare (1564–1616)
“For centuries the death penalty, often accompanied by barbarous refinements, has been trying to hold crime in check; yet crime persists. Why? Because the instincts that are warring in man are not, as the law claims, constant forces in a state of equilibrium.”
—Albert Camus (1913–1960)