These varves allow a chronology to be established, because of the leaf fragments embedded in them, which have been used to calibrate the Carbon-14 time scale beyond the range of the absolute tree-ring calibration.
; to assure this is the case, Flight inspection organizations periodically check critical parameters with properly equipped aircraft to calibrate and certify NDB precision.
Radio noise source, a device that emits radio waves at a certain frequency, used to calibrate radio telescope
Cooley and Hansen (1989) calibrate a cash-in-advance version of a business cycle model.