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The Wall of Weather: Space
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Michigan Doppler Radar
NASA Live Earth
Left: Great Lakes Weather Loop from NOAA
Right: The live photo of Earth is from NASA
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Space Weather

SOHO, the Solar & Heliospheric Observatory, is a project of international collaboration between ESA and    
NASA to study the Sun from its deep core to the outer corona and the solar wind.

SOHO was launched on December 2, 1995. The SOHO spacecraft was built in Europe by an industry team
led byprime contractor Matra Marconi Space (now EADS Astrium) under overall management by ESA.
The twelve instruments on board SOHO were provided by European and American scientists. Nine of the
international instrument consortia are led by European Principal Investigators (PI's), three by PI's from
the US. Large engineering teams and more than 200 co-investigators from many institutions supported the
PI's in the development of the instruments and in the preparation of their operations and data analysis.
NASA was responsible for the launch and is now responsible for mission operations. Large radio dishes
around the world which form NASA's Deep Space Network are used for data downlink and commanding.
Mission control is based at Goddard Space Flight Center in Maryland.

EIT (Extreme ultraviolet Imaging Telescope) images the solar atmosphere at several wavelengths, and
therefore, shows solar material at different temperatures. In the images taken at 304 Angstrom the bright
material is at 60,000 to 80,000 degrees Kelvin. In those taken at 171 Angstrom, at 1 million degrees. 195
Angstrom images correspond to about 1.5 million Kelvin, 284 Angstrom to 2 million degrees. The hotter
the temperature, the higher you look in the solar atmosphere.

Last 30 days The Estimated 12-hour
Planetary Kp-index
mag-swepam-24-hou goes-electron-flux
Real-time Solar Wind
The GOES X-ray Flux plot
EIT 195 EIT 284A
SOHO is a project
of international
cooperation between

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