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Reprocessing of S-NPP VIIRS DNB detector gains and dark offsets
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Paper Abstract

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.

Paper Details

Date Published: 9 September 2019
PDF: 9 pages
Proc. SPIE 11127, Earth Observing Systems XXIV, 111271U (9 September 2019); doi: 10.1117/12.2528891
Show Author Affiliations
Chengbo Sun, Global Science & Technology, Inc. (United States)
Thomas Schwarting, Science Systems and Applications, Inc. (United States)
Kwofu Chiang, Science Systems and Applications, Inc. (United States)
Hongda Chen, Science Systems and Applications, Inc. (United States)
Sergey Gusev, Global Science & Technology, Inc. (United States)
Xiaoxiong Xiong, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 11127:
Earth Observing Systems XXIV
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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