@nasa : Live coverage of the launch of NASA’s Orbiting Carbon Observatory-2 (OCO-2) mission is underway from Vandenberg Air Force Base in California, where preparations for the liftoff of ULA’s Delta II rocket carrying OCO-2 to space are happening. Launch is targeted for the opening of a 30-second window at 5:56:23 a.m. EDT (2:56:23 a.m. PDT) from Space Launch Complex 2. There is a 100 percent chance of favorable weather for launch with no range safety launch commit criteria violations predicted. Visibility is forecast to be 1-2 miles with fog and a northerly wind of 4-7 knots. Based on the weather forecast and no technical issues, NASA Launch Manager Tim Dunn has given a “go” to load liquid oxygen into the Delta II rocket first stage at Space Launch Complex 2. The launch team has completed troubleshooting a water suppression system issue that resulted in the scrub of a launch attempt Tuesday. A valve that is part of the launch pad pulse suppression water system, which had operated properly during tests shortly before the countdown, failed to function properly during the final minute before launch. The failed valve was replaced with a spare and the system was retested in preparation for today’s launch attempt. OCO-2 is NASA’s first mission dedicated to studying atmospheric carbon dioxide, the leading human-produced greenhouse gas driving changes in Earth’s climate. OCO-2 will provide a new tool for understanding the human and natural sources of carbon dioxide emissions and the natural “sinks” that absorb carbon dioxide and help control its buildup. The observatory will measure the global geographic distribution of these sources and sinks and study their changes over time. Watch online at http://www.nasa.gov/nasatv Image credit: NASA #OCO2 #space #earthrightnow #carbon #earthscience #earth
โพสต์เมื่อ 2 ก.ค. 2557 | 15:14 น.
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