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Orbiting Carbon Observatory 2
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Orbiting Carbon Observatory-2 (OCO-2) is an American environmental science satellite that measures carbon dioxide and plant growth on Earth. Launched on 2 July 2014 as a NASA mission, it is a replacement for the Orbiting Carbon Observatory, which was lost in a launch failure in 2009. It is the second successful high-precision CO2 observing satellite, after GOSAT.