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The simulated observables permit analysis of the potential contribution Four-way lunar Lander Orbiter tracking could make to precision orbit determination for the Orbiter.
This grew to 12 metres (40 feet) and gradually eroded one of three struts that secured the booster's base to the large external tank carrying liquid hydrogen and liquid oxygen for the orbiter engines.
A large external tank carried the liquid-oxygen and liquid-hydrogen propellants for the orbiter's three powerful engines.
Millions of bits of data from the investigation of the space shuttle Columbia are beginning to coalesce into a detailed picture of the most likely chain of events for the orbiter's disintegration, briefings and comments by the investigators suggest.
The U.S. space shuttle consisted of three major components: a winged orbiter that carried both crew and cargo; an external tank containing liquid hydrogen (fuel) and liquid oxygen (oxidizer) for the orbiter's three main rocket engines; and a pair of large, solid-propellant, strap-on booster rockets.
At a news conference on Tuesday, Candice Hansen, deputy principal investigator for the orbiter's high-resolution camera, said it now appeared that a layer of translucent carbon dioxide ice, perhaps half a yard thick, formed over the south polar terrain during the winter months.
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In the case of the space shuttle, for example, the mating of the orbiter with the external tank and solid rocket boosters is conducted with tail down in the 160-metre- (525-foot) high Vehicle Assembly Building at the Kennedy Space Center in Florida.
Enterprise, which is a prototype for the orbiters and is now on display at the National Air and Space Museum, would then be transported to New York City.
The screw-up seems to have occurred between the JPL navigation team for the orbiter--which from tracking data determined the spacecraft's position and how its trajectory should be changed--and the spacecraft team at Lockheed Martin Astronautics in Denver, which told the probe how to fire its thrusters to get on target.
So Congress gave NOAA special permission to spend what was needed "to maintain the planned launch schedules" for the orbiters.
Before heading for home, the Orbiter will also deposit four "Netlanders," small probes that will form a network of seismic and weather stations.
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