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(单词翻译:双击或拖选)
By David McAlary
Washington
29 August 2006
The Mobile Launcher Platform sits on the crawlerway near the Space Shuttle Atlantis at the Kennedy Space Center in Cape1 Canaveral, Florida
A drop in storm intensity2 has caused the U.S. space agency NASA to return the shuttle Atlantis back to the launch pad after it was being pulled toward its hangar for shelter. The reversal means the planned mission to resume International Space Station construction can meet a September launch deadline.
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NASA's original decision Tuesday to remove Atlantis from the launch pad was the result of a weather forecast that predicted Tropical Storm Ernesto's winds would almost reach the limit for an exposed shuttle to withstand. "It does not make any sense to fool with Mother Nature," said shuttle program director Wayne Hale.
"You want to do what is safe. When the forecast persisted in bringing the storm to the Kennedy Space Center area, we decided3 that it would be most prudent4 to go back to the barn and wait it out there," he said.
But five hours later, when Atlantis had gotten half way back to its hangar, the storm's winds subsided5 a little, so NASA rolled it back in the other direction. "That was the data that allowed us to feel comfortable to take the vehicle back out to the pad," said shuttle launch director Mike Leinbach. "Atlantis is back out at the pad and we'll get on with pad processing after the storm passes us," he said.
Leinbach says Atlantis could be on its way with cargo6 to resume expansion of the International Space Station by September 6 or 7. This would be a relief for NASA, which had set September 7 as the deadline for the mission.
The date is dictated7 by the need to avoid a later launch that would conflict with a Russian Soyuz liftoff September 14 of a new Russian-American space station crew. It is also dependent on NASA's desire for a daylight takeoff so it can observe how much debris8 flies off the shuttle's external fuel tank. It wants to make sure that its tank modifications9 have ended the threat of a large piece of hard insulating foam10 falling off and threatening the shuttle's fragile heat shield, like the piece that punctured11 and doomed12 the shuttle Columbia in 2003.
NASA is eager to finish the half-built space station in the four years left before the shuttle fleet is retired13 in 2010. Construction stopped after the Columbia disaster forced a moratorium14 on shuttle flights. The only two flights since then have been tests of safety improvements to the fuel tank, but carried no major parts for the research outpost.
Now, Atlantis is packed with a 17-ton girder holding a second set solar arrays that will power future station laboratories, living quarters, and other equipment.
1 cape | |
n.海角,岬;披肩,短披风 | |
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2 intensity | |
n.强烈,剧烈;强度;烈度 | |
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3 decided | |
adj.决定了的,坚决的;明显的,明确的 | |
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4 prudent | |
adj.谨慎的,有远见的,精打细算的 | |
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5 subsided | |
v.(土地)下陷(因在地下采矿)( subside的过去式和过去分词 );减弱;下降至较低或正常水平;一下子坐在椅子等上 | |
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6 cargo | |
n.(一只船或一架飞机运载的)货物 | |
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7 dictated | |
v.大声讲或读( dictate的过去式和过去分词 );口授;支配;摆布 | |
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8 debris | |
n.瓦砾堆,废墟,碎片 | |
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9 modifications | |
n.缓和( modification的名词复数 );限制;更改;改变 | |
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10 foam | |
v./n.泡沫,起泡沫 | |
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11 punctured | |
v.在(某物)上穿孔( puncture的过去式和过去分词 );刺穿(某物);削弱(某人的傲气、信心等);泄某人的气 | |
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12 doomed | |
命定的 | |
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13 retired | |
adj.隐退的,退休的,退役的 | |
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14 moratorium | |
n.(行动、活动的)暂停(期),延期偿付 | |
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