The Vis-DayNight is a new channel available on the JPSS-1 and Suomi-NPP Polar Orbiting satellites. You can look at the Quick Guide for this channel here https://nasasporttraining.files.wordpress.com/2015/12/dnb-rgb-quick-guide-nasa-sport-3.pdf.
The Vis-DayNight Band is a panchromatic (sensitive to all visible colors) channel covering wavelengths from 500 to 900 nm.
The Vis-DayNight Band is available in NinJo through the Polar Orbiting Satellite Data Gui shown below.
Since the Vis-DayNight Band includes most of the visible spectrum, it can detect visible light emitted or reflected at night. For instance, city lights or the Northern Lights. Notice the northern lights shown on the image below compared to the Night Microphysics RGB. You can faintly see the north Labrador Coast and Ungava Bay due to light emitted from the northern lights reflecting off of the surface under clear skies.
In the image below you can see the clouds at night due to the reflectance of the Sun’s light off of the Moon and onto Earth. You can also see that the city lights are vibrant under clear skies and kind of muffled under relatively thin cloud. A phenomenon called Airglow (https://www.britannica.com/science/airglow) can also generate light in the upper atmosphere which can be reflected off of clouds and the surface at night.
Juliana Paul
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