5 September 2017 Prediction of S-NPP VIIRS DNB stray light correction
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Abstract
The VIIRS Day-Night-Band (DNB) is a panchromatic band with three gain stages used for delivering imagery under conditions ranging from daylight to low light nighttime scenes. Early in the S-NPP mission a gray haze was observed in some nighttime DNB imagery with the cause determined to be stray light contamination. This effect was characterized along with a proposed correction algorithm. The correction algorithm was subsequently included in operational data processing and re-processing. However, in order to process real-time data, prediction of the stray light correction is necessary. In this paper we present a new method to predict the DNB stray light correction Look-Up-Tables (LUTs). Since measurements suitable for characterizing the stray light contamination are sparse (about once a month during new-Moon), and because some of the measurements might not be accurate due to the presences of unaccounted light sources, such as algae glow and lightening, we have applied additional constraints to the model by assuming that certain patterns of the stray light are repeatable. Comparisons of the LUT parameters produced by the prediction algorithm with those from the measurements will be presented along with the impact on the derived Earth View products.
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Chengbo Sun, Chengbo Sun, Thomas Schwarting, Thomas Schwarting, Hongda Chen, Hongda Chen, Kwofu Chiang, Kwofu Chiang, Xiaoxiong Xiong, Xiaoxiong Xiong, } "Prediction of S-NPP VIIRS DNB stray light correction", Proc. SPIE 10402, Earth Observing Systems XXII, 104022J (5 September 2017); doi: 10.1117/12.2274136; https://doi.org/10.1117/12.2274136
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