July 10, 2009

George H Diller Kennedy Space Center, Fla 321-867-2468 george h diller@nasa gov

Rob Gutro/Laura Layton Goddard Space Flight Center, Greenbelt, Md 301-286-4044/8170 robert j gutro@nasa gov / laura a layton@nasa gov

RELEASE: 36-09

NASA'S SOLAR DYNAMICS OBSERVATORY ARRIVES AT KENNEDY SPACE CENTER

GREENBELT, Md -- NASA's Solar Dynamics Observatory (SDO) arrived at NASA's Kennedy Space Center, Fla , on July 9 for its upcoming mission to study the sun in unprecedented detail and its effects on Earth

The spacecraft left NASA's Goddard Space Flight Center in Greenbelt, Md , where it was built and tested, on July 7

SDO will undergo final testing at Astrotech Space Operations, located near Kennedy Space Center, in preparation for its anticipated November launch Engineers will perform a battery of comprehensive tests to ensure SDO can withstand the stresses and vibrations of the launch itself, as well as what it will encounter in its space environment after launch

After the final tests are completed, SDO will move to Launch Complex 41 at the Cape Canaveral Air Force Station A United Launch Alliance Atlas V rocket will launch the solar-studying spacecraft into orbit

SDO will take measurements and images of the sun in multiple wavelengths for at least five years during its primary science mission The spacecraft will collect a staggering 1 5 terabytes of data daily, the equivalent of downloading a half million songs a day

Space weather results from changes on the sun, called solar activity Active regions on the sun can erupt suddenly and violently, usually in the form of a solar flare or coronal mass ejection (CME)

Flares and CMEs can send millions of tons of solar material and charged particles streaming toward Earth on the solar wind When the star stuff reaches Earth's atmosphere, it can damage orbiting satellites and wreak havoc on navigation systems and the power grid Understanding space weather requires knowing the nature of changes that happen in the sun

SDO is the first space weather research network mission in NASA's Living With a Star Program The spacecraft's long-term measurements will give solar scientists in-depth information about changes in the sun's magnetic field and insight into how those changes affect Earth

For more information about SDO, visit:

http://sdo gsfc nasa gov

http://www nasa gov/sdo

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