Just after midnight on Aug. 28, the Visible Infrared Imaging Radiometer Suite on the Suomi-NPP satellite captured this nighttime view of Isaac and the cities near the Gulf Coast. The VIIRS “day-night band,” detects light in a range of wavelengths from green to near-infrared and uses light intensification to enable the detection of dim signals. In this case, the clouds of Isaac were lit by moonlight.
