At the L-1 Atlantis launch countdown status briefing, NASA Test Director Steve Payne reported that all systems are "go" for liftoff and there are no issues being reported to hamper an on-time launch to the International Space Station at 2:28 p.m. EST Monday.
"After many, many months of hard work, STS-129 Atlantis and her crew are nearly ready to fly," said Payne. "We’ve had a clean countdown to date and are currently on schedule with no problems to report."
Main avionics check outs are still being performed and orbiter to ground communication tests will be completed this afternoon.
The flight crew’s personal items also will be stowed this afternoon along with the recumbent seat that will accommodate the return of Nicole Stott, who has been serving as Flight Engineer at the station.
Shuttle Weather Officer Kathy Winters of the 45th weather squadron was pleased to announce that the forecast for launch day remains at 90-percent both for fueling of the external tank and for liftoff.
Weather continues to look good for the transatlantic abort, or TAL, sites where the shuttle could land in the unlikely event of an emergency although there still is a possibility of high seas where the solid rocket booster recovery ships are stationed.
If there is a 24-hour turnaround, Winters said the forecast increases to 30-percent probability that weather will violate weather constraints.
At about 5:30 p.m. today, the Rotating Service Structure that protects the shuttle from inclement weather will be rolled away. Loading of propellants into the external tank is scheduled to begin at around 5 a.m. Monday.