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Two satellite instruments aboard NASA's Solar Radiation & Climate Experiment (SORCE) mission -- the Total Solar Irradiance Monitor (TIM) and the Solar Irradiance Monitor (SIM) -- have made daily measurements of the sun's brightness since 2003.
BELTSVILLE, Md. _ NASA plans to launch a new satellite next year that will help scientists fill in a gap in their understanding of global warming: the role of clouds and airborne particles.
Using space-based tools, like the Solar Radiation and Climate Experiment (SORCE), NASA has studied how much solar energy illuminates Earth, and explored what happens to that energy once it penetrates the atmosphere.