Night Lights Across The United States - A Dazzling Display From Space
“Nothing tells us more about the spread of humans across the Earth than city lights,” asserts Chris Elvidge, a NOAA scientist who has studied them for 20 years, said about the newest NASA nighttime images from a NASA satellite.
The image was made possible by the satellite's "day-night band" of the Visible Infrared Imaging Radiometer Suite (VIIRS), which detects light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe dim signals such as city lights, gas flares, auroras, wildfires and reflected moonlight.
Data is sent once per orbit to a ground station in Svalbard, Norway, and continuously to local direct broadcast users around the world.
Credit: NASA Earth Observatory/NOAA NGDC