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 almighty has never made known to any body at what time he created [the world], nor will he tell any body when he means to put an end to it, if ever he means to do it.”
—Thomas Jefferson (1743–1826)
“I am constant as the northern star,
Of whose true-fixed and resting quality
There is no fellow in the firmament.”
—William Shakespeare (1564–1616)
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