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VANDENBERG AIR FORCE BASE, Calif. – The Delta II rocket with the Ocean Surface Topography Mission, or OSTM/Jason 2, aboard is poised for launch on Space Launch Complex 2 after rollback of the mobile service tower. The OSTM/Jason 2 satellite will embark on a globe-circling voyage to continue charting sea level, a vital indicator of global climate change. The mission will return a vast amount of new data that will improve weather, climate and ocean forecasts. OSTM/Jason 2's expected lifetime of at least three years will extend into the next decade the continuous record of these data started in 1992 by NASA and the French space agency Centre National d'Etudes Spatiales, or CNES, with the TOPEX/Poseidon mission. The data collection was continued by the two agencies on Jason-1 in 2001. The launch window extends from 12:46 a.m. to 12:55 a.m. PDT. The satellite will be placed in an 830-mile-high orbit at an inclination of 66 degrees after separating from the Delta II 55 minutes after liftoff. Photo credit: Photograph by Carleton Bailie for United Launch Alliance