Supermoon VIIRS Day/Night Band imageryThe only Supermoon of 2017 occurred on 03 December — and a composite of Suomi NPP VIIRS Day/Night Band (0.7 µm) swaths viewed using RealEarth (above) demonstrated the “visible image at night” capability of that spectral band. A VIIRS instrument is also part of the payload on recently-launched JPSS-1/NOAA-20.
A few examples providing closer looks using VIIRS Day/Night Band (DNB) imagery are shown below, beginning with the western portion of an Atlantic storm that had been producing Gale Force winds during the previous 6-12 hours.A toggle between Day/Night Band (0.7 µm) and Fog/stratus Infrared Brightness Temperature Difference (11.45 µm – 3.74 µm) images, centered over the Southeast US (below) showed widespread areas of fog and/or stratus The brighter fog/stratus features were generally brighter on the DNB image.. Another toggle between DNB and Fog/stratus Infrared Brightness Temperature Difference images, this time centered over Minnesota, Wisconsin and the UP of Michigan (below) revealed snow cover that was much below average for the date — especially across the UP of Michigan. Finally, a toggle between DNB images from consecutive overpass times (0935 and 1116 UTC), showing small clusters of rain showers moving inland along the coast of Oregon and far northern California (below). Because of the wide scan swath of the VIIRS instrument (2330 km), there are times when the same area will be imaged during 2 consecutive overpasses.