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CAPE CANAVERAL, Fla. - At the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida, the shuttle training aircraft piloted by STS-125 Commander Scott Altman is ready to taxi to the runway for practice shuttle landings. The STA is a Grumman American Aviation-built Gulf Stream II jet that was modified to simulate a shuttle’s cockpit, motion and visual cues, and handling qualities. In flight, the aircraft duplicates the shuttle’s atmospheric descent trajectory from approximately 35,000 feet altitude to landing on a runway. The practice is part of a terminal countdown demonstration test, or TCDT, to prepare for launch. TCDT provides astronauts and ground crews with an opportunity to — NASA KSC · 2008. ABD devlet eseri: kamu mali, ticari islerde de serbestce kullanilabilir.
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