• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Air Force and space digest >Air Force Counters GPS-in-Trouble Talk
【24h】

Air Force Counters GPS-in-Trouble Talk

机译：空军计数器GPS问题解答

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

Responding to press reports in May about the impending doom of the Global Positioning System constellation of precision position, navigation, and timing satellites starting next year, Air Force officials said the constellation is in good health, there are options to mitigate a potential coverage gap, and the next iterations of GPS satellites appear to be on solid footing.rnThe Government Accountability Office warned in April of a potential gap in GPS coverage starting in 2010 if the constellation begins to shrink in size, due to the almost three-year delay in the first launch of a Block IIF satellite and the fact that the Block III program is still in its early stages and could also face developmental challenges and cost spikes.rnIn fact, even if the Air Force can keep the Block IIF and Block III systems on their current schedules—first Block IIF launch is expected around November, while the first Block III launch is projected in 2014—there is still a 20 percent chance the constellation will fall below the 24 satellites considered necessary to provide the standard of global coverage to which the US is committed, GAO stated.rnAddressing this, Gen. C. Robert Kehler, commander of Air Force Space Command, told the Senate Armed Services strategic forces subcommittee May 20 that the fact that the Air Force now has 33 GPS satellites on orbit, including three spares, provides "a little bit of breathing space" if an issue arises with getting new GPS capability on orbit on schedule.rnKehler also said the Air Force believes that it has "worked through the problems" that plagued the GPS Block IIF program and that the Block III program is "progressing very well."
机译：空军官员在5月份的新闻报道中称，明年即将开始的全球精确定位，导航和定时卫星星座将面临灭顶之灾，空军官员表示，该星座状况良好，可以通过多种选择来缓解潜在的覆盖面缺口，政府问责办公室在4月份警告说，如果星座的规模开始缩小，由于星座的大小将近三年的延迟，那么从2010年开始GPS覆盖范围可能存在差距。首次发射Block IIF卫星，并且Block III计划仍处于早期阶段，并且还可能面临发展挑战和成本飙升。rn实际上，即使空军可以将Block IIF和Block III系统保持在其状态当前的时间表-预计将于11月左右首次发布Block IIF，而预计于2014年首次发布Block III-星座群仍有20％的机会美国国家航空航天局表示，n将低于被认为是提供美国所承诺的全球覆盖标准所必需的24颗卫星。rn对此，空军太空司令部司令罗伯特·凯勒将军告诉参议院武装部队战略部队小组委员会5月20日说，如果按计划在轨道上获得新的GPS功能会出现问题，那么空军现在有33颗GPS卫星在轨，其中包括三个备用卫星，这一事实提供了“一点呼吸空间”。 Force认为它已经“解决了困扰GPS Block IIF计划的问题”，并且Block III计划“进展顺利”。

著录项

  • 来源
    《Air Force and space digest》 |2009年第7期|17-17|共1页
  • 作者

  • 作者单位
  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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