Satellite captures "black marble" view of Earth at night

SAN FRANCISCO Thu Dec 6, 2012 5:30am EST

1 of 8. Lights across the earth are pictured in this NASA handout satellite image obtained by Reuters December 5, 2012. This new image of the Earth at night is a composite assembled from data acquired by the Suomi National Polar-orbiting Partnership (Suomi NPP) satellite over nine days in April 2012 and thirteen days in October 2012. It took 312 orbits and 2.5 terabytes of data to get a clear shot of every parcel of Earth’s land surface and islands.

Credit: Reuters/NASA/Handout.

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SAN FRANCISCO (Reuters) - Almost 40 years to the day after the Apollo 17 crew snapped the famed "blue marble" image of Earth floating in space on December 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 above Earth's poles.

Scientists used the day-night sensor to watch the superstorm Sandy, illuminated by moonlight, hit the New Jersey shore on October 29. It also captured the power outages that plunged the area into darkness as the storm tore into populated areas.

The National Weather Service is starting to use the VIIRS day-night sensor to forecast fog in coastal regions, including San Francisco.

Some VIIRS images have surprised scientists. The sensor, for example, captured light from the upper atmosphere illuminating clouds and ice in visible wavelengths - by night.

Link to images: here

(Editing by Tom Brown and Peter Cooney)

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Comments (2)
Hachey wrote:
Wow these are great images, although I’d suggest that someone in NASA’s photo lab should have another look at the north-central -western part of the Australian continent…there’s a lot of lights out in a place that is nothing but desolate and largely inhospitable and uninhabited country!! The image makes it look like it more popilated than Sydney, trust me there aint nothing out there (unless we have our very own Area 51)


Dec 06, 2012 4:09am EST  --  Report as abuse
StigTW wrote:
I was thinking the same thing about the Australia part of the image. It’s extraordinarily bright out in the middle of the dustbowl.
Did another country silently move in and setup?
Or perhaps Australia has been secretly hiding a vast array of cities and a billion people in the desert?
…There’s mining out there but that much mining?

Dec 06, 2012 12:40pm EST  --  Report as abuse
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