Solar Radiation and Climate Experiment (SORCE) is a NASA satellite intended to measure X-ray, visible, ultraviolet, infrared solar radiation. These measurements specifically addressed long-term climate change, natural variability, atmospheric ozone, and UV-B radiation. SORCE was launched on January 25, 2003 and was deactivated on February 25, 2020, with the forecast to fall into Earth's atmosphere in 2032.
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