From a vantage point of nearly one million miles away NASA’s EPIC camera aboard NOAA’s DSCOVR satellite captures an image of the entire Earth every 1-2 hours as it rotates. For the last year and a half or so these pictures have been uploaded on the EPIC website for public viewing and use as they originally look to the EPIC instrument; now there’s an option to view Earth in “enhanced” mode, which boosts the contrast, saturation, and overall appearance to make landforms and clouds more apparent—and you can even zoom in too, in true CSI-style!
“The ‘enhanced’ color images make land features more visible,” said Sasha Marshak, DSCOVR deputy project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “This is achieved by enhancing low intensity pixel values. The effect of atmospheric haze caused by air molecular scattering and attenuation of solar light by ozone has been also removed.”
Read more from NASA here: NASA Makes an EPIC Update to Website for Daily Earth Pics
It’s over halfway through 2015 and perhaps it’s high time for an all-new, updated, knock-your-socks-off “blue marble” photo of our beautiful planet Earth. And so earlier this week NASA delivered just that, courtesy of the high-definition EPIC camera (yes, that’s a real acronym) aboard the DSCOVR spacecraft positioned nearly a million miles away toward the Sun. The image above was captured on July 6, 2015, using the camera’s visible-light channels… it’s how Earth would appear to our eyes were we there (with the help of a telephoto lens, that is.)
And it really is a “blue marble” image, of the kind previously only captured by departing (or approaching) planetary exploration spacecraft or from inside Moon-bound Apollo capsules (see below)… you simply can’t get a shot like this from low-Earth orbit!
“This is the first true blue marble photo since 1972.”
– John Grunsfeld, NASA, July 24, 2015
In daylight our big blue marble is all land, oceans and clouds. But the night is electric.
This image of North and South America at night is a composite assembled from data acquired by the Suomi NPP satellite in April and October 2012. The new data was mapped over existing Blue Marble imagery of Earth to provide a realistic view of the planet.
The nighttime view was made possible by the new satellite’s “day-night band” of the Visible Infrared Imaging Radiometer Suite. VIIRS 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. In this case, auroras, fires, and other stray light have been removed to emphasize the city lights.
Although the view looking down from space is of a sparkling show, the downside of course is light pollution over major metropolitan areas which impede the view of the night sky from the ground. (Find out more at the International Dark Sky Association site.)
Read more (and watch a video of these nighttime images of Earth) below:
If you haven’t seen this before, you’re probably not alone. It’s a video made from a series of several hundred images acquired by NASA’s MESSENGER spacecraft as it swung past Earth, departing forever on its journey to Mercury on August 2, 2005 — just a day shy of one year after its launch. Many blogs that are around today didn’t exist then (including Lights in the Dark!) and so there’s probably lots of people who haven’t had a chance to watch this.
I suggest you check it out. It’s very cool.