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Laboratory for Atmospheric and Space Physics

SORCE Receives 4-Year Extension to Study the New Solar Cycle

September 1, 2007


I’m sure you have heard of the old cliché wondering if a tree falls in the forest and nobody is present to observe it, does it really occur? With the interesting, but controversial, predictions of the next solar cycle maximum perhaps being higher or lower than the past cycle maximum, there is much interest in how the next cycle might evolve. But how will we know what the results are if we are not observing the solar irradiance during the next maximum that is expected to occur in 2012? This might have been the case, but fortunately NASA has recently extended the Solar Radiation and Climate Experiment (SORCE) for another four years past its planned termination date of January 2008.

The SORCE mission provides direct measurements of the total solar irradiance (brightness) and also spectral measurements of the solar irradiance, both being critical to observe how the solar variations might evolve during the next cycle maximum. The SORCE extension, along with the possible extension of the NASA TIMED mission with its solar ultraviolet irradiance measurements, will provide for the first time, the total solar radiative output (total irradiance) and the spectral distribution of this radiation from X-rays to the infrared (spectral irradiance) during solar maximum conditions.

The SORCE mission has been extended for 4 more years until January 2012. The majority of the work is at CU-LASP for the daily operation of the satellite and instruments using a combination of professionals and students and for the data analysis and distribution of solar irradiance results to the public. The SORCE mission is operated as a PI-mode mission at CU-LASP with Dr. Tom Woods as the PI (original PI is Dr. Gary Rottman, who retired in 2005) and is supported by NASA GSFC.

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