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- W2891367981 abstract "The Day/Night Band (DNB) of the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard SNPP represents a major advancement in night time imaging capabilities. The DNB senses radiance spanning 7 orders of magnitude in one panchromatic (0.5-0.9 μm) reflective solar band and provides imagery of clouds and other Earth features over illumination levels ranging from full sunlight to quarter moon. When the satellite passes through the day/-night terminator, the DNB sensor is affected by stray light due to solar illumination on the instrument. Current operational stray light correction for Suomi-NPP VIIRS DNB is based on monthly stray light correction Look-up-Table (LUT) which is separated into LUTs for northern and southern hemisphere. Granules with stray light around new Moon are first visually inspected for minimum light contamination such as artificial light, aurora or other light sources and then are selected for stray light correction LUT generation. This paper developed a light contamination ranking index (LCRI)- based algorithm to automate DNB granule selection and stray light correction LUT generation. This method provides means to evaluate the light contamination quantitatively. In this method, an evaluation region is defined across multiple granules in one orbit for northern and southern hemisphere, respectively. The pixel radiance in the prescribed evaluation region is quantitatively scored with Light Contamination Index (LCI), and percentage of pixels with radiance ratio value above the threshold is evaluated. Imagery quality score can be assessed as percentage of bad pixels in the region of interest. The LCI of DNB images are ranked and images with LCI below certain threshold are selected to ensure containing minimum light contamination. This paper demonstrated the effectiveness of LCRI-method in constructing stray light correction LUT and removing stray light from DNB images." @default.
- W2891367981 created "2018-09-27" @default.
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- W2891367981 date "2018-09-07" @default.
- W2891367981 modified "2023-09-27" @default.
- W2891367981 title "A light contamination ranking index-based method for automating VIIRS day/night band stray light correction" @default.
- W2891367981 doi "https://doi.org/10.1117/12.2322999" @default.
- W2891367981 hasPublicationYear "2018" @default.
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