The second stage of a United Launch Alliance Delta II is prepared for its move from NASA Hangar 836 to Space Launch Complex-2 at Vandenberg Air Force Base.

The second stage of a United Launch Alliance Delta II that will carry NASA's National Polar-orbiting Operational Environmental Satellite System Preparatory Project (NPP) satellite into space is prepared for its move from NASA Hangar 836 to Space Launch Complex-2 at Vandenberg Air Force Base in California.

NPP will be positioned 512 miles above the Earth's surface and will orbit about 16 times each day to observe nearly the entire globe. The NPP mission for NASA and the National Oceanic and Atmospheric Administration (NOAA) is to measure Earth's atmospheric and sea surface temperatures, humidity sounding, land and ocean biological activity, and cloud and aerosol properties. For more information, visit www.nasa.gov/NPP. Photo credit: NASA/VAFB