...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aviation Week & Space Technology >Shuttle Choices Long Overdue
【24h】

Shuttle Choices Long Overdue

机译：班车选择逾期未到

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The space shuttle era is over. NASA has committed to retiring the shuttle by 2010 as a key part of the Vision for Space Exploration, the new (2004) U.S. policy for human and robotic space exploration. The plan was made with the expectation that the three remaining or-biters could carry out the flights needed to complete the International Space Station (ISS) and that a new Crew Exploration Vehicle (CEV) could be operating by 2014. NASA Administrator Michael Griffin now hopes to advance that date by several years, but budgets may limit his ability to do so. Recent events have made the road rougher for implementing the vision. The return to flight after the Columbia accident has not gone well, with another seven-month delay expected after the July 2005 Discovery mission. After the financial impact from Hurricane Katrina is assessed, this delay may become even longer. The cost estimates for returning the shuttle to regular flights are also soaring; an internal NASA memorandum has suggested that more than $1 billion extra per year will be needed to meet the shuttle's demands. With growing budget deficits, the wars in Iraq and Afghanistan, and massive post-Katrina expenses, NASA may have to choose among continuing to fly the shuttle, getting started on space exploration or cutting other elements of its program.
机译：航天飞机时代已经结束。美国宇航局已承诺在2010年之前将航天飞机退役，这是“太空探索愿景”的一项重要内容，该愿景是美国于2004年制定的新的人类和机器人太空探索政策。该计划的制定是希望剩下的三个轨道飞行器可以完成完成国际空间站（ISS）所需的飞行，并且新的乘员探索飞行器（CEV）可以在2014年之前运行。NASA局长迈克尔·格里芬（Michael Griffin）现在希望将日期提前几年，但预算可能会限制他这样做的能力。最近发生的事件使实现愿景的道路更加艰难。哥伦比亚事故发生后，重返飞行的进展并不顺利，预计在2005年7月的“发现”号任务之后，又将推迟七个月。在评估了卡特里娜飓风的经济影响之后，这种延迟可能会变得更长。将班车返回常规航班的费用估算也正在飙升；美国宇航局内部备忘录建议，每年需要多出10亿美元来满足航天飞机的需求。随着预算赤字的增加，伊拉克和阿富汗的战争以及卡特里娜飓风过后的巨额支出，美国宇航局可能不得不选择继续乘坐航天飞机，着手进行太空探索或削减其计划的其他内容。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号