OCO (Orbiting Carbon Observatory 2 and 3)

Launch Weather Officer Lt. Joseph Round of the 30th Operations Support Squadron just briefed the launch team on this morning's conditions. With nothing significant on the radar and light winds at about 4 knots, there are no violations of weather criteria and there is virtually no chance of weather interfering with liftoff today. The fog …

It's early in the morning at Vandenberg Air Force Base in California, but the launch team has been up through the night preparing for today's liftoff of NASA's Orbiting Carbon Observatory-2 aboard a United Launch Alliance Delta II rocket. Launch is scheduled for the start of a 30-second window that opens at 2:56:44 a.m. PDT …

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The service tower at Vandenberg Air Force Base's Space Launch Complex 2 has been rolled away, leaving the United Launch Alliance Delta II rocket and OCO-2 spacecraft ready for the countdown. Liftoff is scheduled for 2:56 a.m. PDT, 5:56 a.m. EDT.