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A worker is seen preparing the launch gantry to be rolled back from the United Launch Alliance Delta II rocket with the*Soil Moisture Active Passive (SMAP) observatory onboard, at the Space Launch Complex 2, Wednesday, Jan. 28, 2015, Vandenberg Air Force Base, Calif. Now scheduled to launch early Friday morning, SMAP is NASA’s first Earth-observing satellite designed to collect global observations of surface soil moisture and its freeze/thaw state. SMAP will provide high resolution global measurements of soil moisture from space. The data will be used to enhance scientists' understanding of the processes that link Earth's water, energy, and carbon cycles.Image Credit: NASA/Bill Ingalls
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