The STS-133 count remains on schedule at this time.
Fueling of Discovery's external tank is expected to begin at approximately 1225 UTC. NASA TV coverage begins at 1215 UTC.
This flight delivers a storage module and a robot ("R2") to the ISS.
The STS-133 crew members are Commander Steven Lindsey, Pilot Eric Boe and Mission Specialists Alvin Drew, Michael Barratt, Steve Bowen and Nicole Stott. Bowen replaced astronaut Tim Kopra, who was injured in a bicycle accident in January.
Discovery will deliver and install the Permanent Multipurpose Module, the Express Logistics Carrier 4 and provide critical spare components to the International Space Station. This will be the 35th shuttle mission to the station. It is also Discovery's final flight.
The Eastern Test Range uses many frequencies for booster recovery and safety, but some recent ones are 5711, 6751, 9043, 9132, 10780, 11104, 11548, 13212, and 14837 kHz USB.
Weather forecast shows only a 20% possibility of preventing launch.
