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In this paper, we report a new method for calculating the S-NPP VIIRS Day-Night-Band (DNB) detector dark offsets and gains look-up-tables. During the seven years of S-NPP operation, the NASA VIIRS Characterization Support Team (VCST) has generated detector gain and dark offset calibration coefficients to be used in the DNB L1B Earth view radiance retrieval.[1,2] There have been a few calibration algorithm updates during the mission, however, those changes were only applied to the L1B forward processing. In preparation for reprocessing the L1B data for the entire mission using a consistent calibration method, we have regenerated the DNB gains and dark offset coefficients for the entire mission by integrating all the algorithm updates. The newly obtained gain and dark offset coefficients curve fits as functions of time are smoother than the previous versions. The amplitude of the oscillatory features in the high gain stage calibration fits have been greatly reduced. The preliminary test results show improvements on the DNB Earth view images as expected.
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