A Day in The Life of Earth: Image Gallery | NOAA/NASA DSCOVRHappy Earth Day 2016:
A day in the life of Earth, as seen from a million miles away through the lens of NASA’s Earth Polychromatic Imaging Camera, affixed to NOAA’s Deep Space Climate Observatory.
April 20, 2016: It’s a fresh view of Earth. A year after its launch on the Deep Space Climate Observatory (DSCOVR), NASA’s onboard camera is taking images of the entire sunlit side of Earth every two hours.
The primary objective of DSCOVR, a partnership between NASA, the National Oceanic and Atmospheric Administration (NOAA) and the U.S. Air Force, is to maintain the nation’s real-time solar wind monitoring capabilities, which are critical to the accuracy and lead time of space weather alerts and forecasts from NOAA.
For more information about DSCOVR, visit:www.nesdis.noaa.gov/DSCOVR/
Earth Polychromatic Imaging Camera (EPIC)
NASA has contributed two Earth science instruments for NOAA's space weather observing satellite called the Deep Space Climate Observatory or DSCOVR. One of the instruments called EPIC or Earth Polychromatic Imaging Camera images the Earth in one picture, something that hasn't been done before from a satellite. EPIC also provides valuable atmospheric data.
Previously, to get an entire Earth view, scientists had to piece together images from satellites in orbit. With the launch of the National Oceanic and Atmospheric Administration's (NOAA) DSCOVR and the EPIC instrument, scientists get pictures of the entire sunlit side of Earth. To get that view, EPIC orbits the first sun-Earth Lagrange point (L1), 1 million miles from Earth. At this location, four times further than the orbit of the Moon, the gravitational pull of the sun and Earth cancel out providing a stable orbit for DSCOVR. Most other Earth-observing satellites circle the planet within 22,300 miles.
EPIC assembles its photograph-like views by combining information from the instrument’s red, green, and blue bands. Bands are narrow regions of the electromagnetic spectrum to which a remote sensing instrument responds. When EPIC collects data, it takes a series of 10 images at different bands—from ultraviolet to near infrared.
The effective resolution of the EPIC camera is somewhere between 10 and 15 kilometers (6 to 9 miles) per pixel, according to Adam Szabo, DSCOVR project scientist at NASA’s Goddard Space Flight Center. Since Earth is extremely bright compared to the darkness of space, the exposure time for images is as little as 20 to 100 milliseconds. The much fainter stars in the background are not visible because of this short exposure time.
You can view those images daily by clicking here: http://epic.gsfc.nasa.gov/
All images are public domain.
Image Dates: April 20, 2016
Release Date: April 22, 2016+NASA's Earth Observatory +NASA Goddard +NOAA Weather +Al Gore #NASA #NOAA #Spacex #Space #Satellite #Earth #DSCOVR #Solar #Sun #SolarWind #Weather #Science #Climate #DeepSpace #Observatory #EPIC #USAF #AirForce #Military #Orbit #Lagrange #AlGore