OCO-2(Orbiting Carbon Observatory-2) is scheduled for Wednesday, July 2 at 5.56 am from Space Launch Complex 2 at Vandenberg Air Force Base in California. The launch team operated properly during tests before the launch countdown, but it failed at final minutes. Their decided to replace the failed value with a spare and the system is being tested in preparation for Wednesday's launch attempt.

OCO-2 will produced the detailed picture of natural sources of carbon dioxide, and also their “sinks” places on Earth surface where carbon dioxide is removed from the atmosphere. By OCO-2 mission we know around the globe and how they change over time.

For more information about OCO-2, visit http://www.nasa.gov/oco2