THE NILE AT NIGHTThe Nile River and its Delta provide a home for about 97 percent of Egypt’s p
THE NILE AT NIGHTThe Nile River and its Delta provide a home for about 97 percent of Egypt’s population, even though the river and delta form less than 5 percent of the country’s land area. This image, taken on October 13, 2012 by the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP satellite shows a nighttime view. The VIIRS captured this image using its “day-night band”; this detects light in a range of wavelengths from green to near-infrared. It uses filtering techniques to observe signals such as gas flares, auroras, wildfires, city lights, and reflected moonlight.Lights are abundant along the full length of the river, though the brightest lights are around Cairo. Away from the lights, the land and water appear black. As the image was acquired near the time of the new Moon, very little moonlight was available to brighten the land and water surfaces. -TELhttp://earthobservatory.nasa.gov/IOTD/view.php?id=79807Image: Jesse Allen and Robert Simmon, using VIIRS Day-Night Band data from the Suomi National Polar-orbiting Partnership. -- source link
Tumblr Blog : the-earth-story.com
#egypt#nature#earth#night#alexandria#cairo#nile river#nile delta#delta#viirs#suomi npp#infrared#sahara