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Controllers report propellant tanks on the Atlas V are at flight pressure. Everything is go.

The GOES-R countdown is ticking toward a liftoff at 6:42 p.m. A computerized autosequencer will take over the countdown in order to conduct a host of activities in precise order.

The launch teams have been their final "go" for launch of the GOES-R spacecraft. Launch time is 6:42 p.m. EST. There are 27 engineers and controllers involved in the final polls.

The launch team is placing the controls in launch position. The solid-fueled boosters have been enabled for liftoff. This Atlas V will use four SRBs to help lift GOES-R into space.

GOES-R is to launch tonight at 6:42 p.m. The launch teams will conduct polls to confirm readiness to launch. The final poll will take place in about 10 minutes.

The GOES-R team has been given a ‘go' to place the spacecraft on internal power. The launch teams are working toward launching at 6:42 p.m., the end of tonight's launch window. The Air Force Eastern Range continues to work an issue.

The Eastern Range that oversees launches from Florida is working an issue. Tonight's launch window extends until 6:42 p.m. EST.

The launch team continues to work through a launch vehicle issue. The current launch time is no earlier than 6:12 p.m. EST. The window is open until 6:42 p.m. EST.

With the countdown in a planned hold, the launch teams are working a launch vehicle issue that will prevent the launch from taking pace at the opening of today's window. The team has not set a new launch time yet but is working in 5-minute increments. Today's launch window extends until 6:42 p.m. EST.

The nation's newest weather satellite will liftoff in ideal conditions, reported Clay Finn, launch weather officer for NOAA's GOES-R mission. The forecast remains 100 percent chance of acceptable conditions. The launch teams continue their procedures this evening as we tick closer to liftoff at 5:42 p.m. EST.