Update VIIRS_SNPP_Ice_Surface_Temp_Night.md

config/default/common/config/metadata/layers/viirs/snpp/VIIRS_SNPP_Ice_Surface_Temp_Night.md

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-The Sea Ice Surface Temperature (Day) layer shows the "skin" temperature of the sea ice surface measured in Kelvin (K). It is derived from radiance data acquired by the Visible Infrared Imaging Radiometer Suite (VIIRS) aboard the joint NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) satellite. Following the approach used by MODIS, the algorithm converts VIIRS calibrated radiances into brightness temperature and computes Ice Surface Temperature (IST) using a split-window technique. Sea Ice Surface Temperature (IST) is an indicator of freeze/thaw processes on ice and has been used to separate thin ice from open water.
+The Sea Ice Surface Temperature (Night) layer shows the "skin" temperature of the sea ice surface measured in Kelvin (K). It is derived from radiance data acquired by the Visible Infrared Imaging Radiometer Suite (VIIRS) aboard the joint NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) satellite. Following the approach used by MODIS, the algorithm converts VIIRS calibrated radiances into brightness temperature and computes Ice Surface Temperature (IST) using a split-window technique. Sea Ice Surface Temperature (IST) is an indicator of freeze/thaw processes on ice and has been used to separate thin ice from open water.
 
 The Ice Surface Temperature layer is available for the Suomi NPP (VNP29) and JPSS-1/NOAA-20 (VJ129) satellites. The sensor resolution is 750 m, imagery resolution is 1 km, and the temporal resolution is daily.