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At Night Earth Images Released

At Night Earth Images Released

Science Technology News : Almost 40 years to the day after the Apollo 17 crew snapped the famed “blue marble” image of Earth floating in space on Dec. 7, 1972, NASA has unveiled “black marble” video views of the planet by night.

The cloud-free pictures, taken with a high-resolution visible and infrared imager aboard a NASA and National Oceanic and Atmospheric Administration satellite, capture the night lights of Earth in unprecedented detail.

The sensor can capture the equivalent of three low-light images simultaneously, giving researchers the opportunity to study Earth’s atmosphere, land and oceans at night.

“It’s very high-quality data,” NOAA scientist Christopher Elvidge told reporters at the American Geophysical Union conference in San Francisco.

“I rate it six times better spatial resolution.”

The so-called day-night band of the Visible Infrared Imaging Radiometer Suite, or VIIRS, can distinguish the night-time glow of Earth’s atmosphere as well as a light from a single ship at sea. The resolution is far sharper than what has been available previously.

VIIRS is aboard the Suomi NPP satellite, which orbits about 500 miles (800 km) above Earth’s poles. Reuters

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