DISCOVERY TO LAUNCH NO EARLIER THAN FEB. 22nd

Pilot Tony Antonelli uses the virtual reality lab in the Space Vehicle Mockup Facility at NASA's Johnson Space Center to train for some of his duties aboard the space shuttle and space station.

NASA's Space Shuttle Program managers will hold a special meeting Feb. 13 to review flow control valve data and determine whether to proceed with the Joint Flight Readiness Review, or FRR, for space shuttle Discovery's STS-119 mission to the International Space Station.

The valves under assessment channel gaseous hydrogen from the shuttle's main engines to the external fuel tank. One of these valves in shuttle Endeavour was found to be damaged after its STS-126 mission in November. As a precaution, Discovery's three gaseous hydrogen valves were removed, inspected and reinstalled.

In light of a positive outcome from the special meeting, the official launch date will be set at the FRR, although for planning purposes, the liftoff currently is scheduled for no earlier than Feb. 22.

Meanwhile, STS-119 Commander Lee Archambault and Pilot Tony Antonelli will fly to White Sands Space Harbor in Las Cruces, N.M., in T-38 training jets late today for night landing practice in NASA's shuttle training aircraft.

Space shuttle Discovery's STS-119 crew is set to fly the S6 truss segment and install the final set of power-generating solar arrays to the International Space Station.

The S6 truss, with its set of large U.S. solar arrays, will complete the backbone of the station and provide one-fourth of the total power needed to support a crew of six.

The two solar array wings each have 115-foot-long arrays, for a total wing span of 240 feet. They will generate 66 kilowatts of electricity -- enough to provide about 30 2,800-square-foot homes with power.

Commander Lee Archambault will lead Discovery's crew of seven, along with Pilot Tony Antonelli, and Mission Specialists Joseph Acaba, John Phillips, Steve Swanson, Richard Arnold and Japan Aerospace Exploration Agency astronaut Koichi Wakata.

Wakata will replace Expedition 18 Flight Engineer Sandra Magnus, who will return to Earth with the STS-119 crew. Wakata will serve as a flight engineer for Expeditions 18 and 19, and return to Earth with the STS-127 crew.

Discovery's STS-119 mission to the International Space Station is targeted to lift off no earlier than Feb. 22.

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