Abstract
New calibration coefficients for channels 1 and 2 of NOAA-14 AVHRR are presented. Observations from the radiometrically stable permanent ice sheet of central Antarctica for the period from launch through January 2001 are used to evaluate the accuracy of published calibration coefficients. The rate of sensor degradation in channels 1 and 2 is found to change after January 1998. The new calibration coefficients more accurately characterize sensor performance to date.
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