A Delta II rocket launches with the NPOESS Preparatory Project (NPP) spacecraft payload from Space Launch Complex 2 at Vandenberg Air Force Base, Calif. on Friday, Oct. 28, 2011. NPP is the first NASA satellite mission to address the challenge of acquiring a wide range of land, ocean, and atmospheric measurements for Earth system science while simultaneously preparing to address operational requirements for weather forecasting. Photo Credit: (NASA/Bill Ingalls)
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