NASA's SMAP REmote Sensing Satellite Will Produce Global Maps of Soil Moisture

An orbiting observatory that measures the amount of water in the top 5 cm (2 inches) of soil everywhere on Earth’s surface will soon be placed in a polar orbit around Earth. It is called SMAP. SMAP stands for Soil Moisture Active and Passive. SMAP will produce global maps of soil moisture. Scientists will use these to help improve our understanding of how water and carbon (in its various forms) circulate.

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