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首页> 外文期刊>Aviation Week & Space Technology >U.S. Air Force Prepares for Future of GPS Ⅲ
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U.S. Air Force Prepares for Future of GPS Ⅲ

机译：美国空军为GPSⅢ的未来做准备

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GPS, the military satellite system that underlies $74 billion in business from banking to agriculture to taxi services is so easy to take for granted that it is viewed as a public utility."We consider to have GPS on our phones [and] our watches like turning on a light switch or a faucet and getting electricity or water," says NASA's Tim Dunn, a launch director at Kennedy Space Center. "It's always there-it should be there."In order for that type of reliability to be maintained, 24 of the 31 satellites-four slots in six orbital planes-must be operational at any given time.The U.S. Air Force is poised to begin launching the first of 10 Lockheed Martin-made GPS spacecraft. Aftermore than a year in storage, the first new GPS III satellite is scheduled to launch Dec. 15 on a SpaceX Falcon 9 from Cape Canaveral AFS in Florida. It arrived there last month, a decade after Lockheed Martin won an initial contract to develop and build two satellites for $1.5 billion. The Air Force is currently checking out the satellite to make sure it is fully operational before launch.For now, Air Force Col. Steven Whitney, director of the GPS Directorate, has been focused on production. Lockheed has nine more GPS IIIs in development and is uncontested in its bid to make another more advanced set of 11.The service has accepted the second space vehicle, which is in storage at Lockheed's surburban Denver facil-ity. Satellites 3-7 are in various stages of production, and Lockheed is buying parts for the ninth and 10th satellites in the constellation. Given a slight pause in an acquisition decision by the Pentagon, there was a gap in funding before proceeding with satellites 9 and 10. Now Whitney says the program is working to requalify one of the most important aspects of GPS-its rubidium atomic clocks.
机译：GPS是一种军事卫星系统，从银行到农业再到出租车服务，其业务总额达740亿美元，它很容易被人们视为理所当然，因此被视为公用事业。“我们考虑在手机[和]手表上安装GPS打开电灯开关或水龙头，然后取水或用电，”肯尼迪航天中心的发射主管美国宇航局局长蒂姆·邓恩说。为了始终保持这种可靠性，为了保持这种可靠性，必须在任何给定时间运行31颗卫星中的24颗，即6个轨道平面上的4个时隙。开始发射洛克希德·马丁公司制造的10台GPS航天器中的第一架。在储存了一年多之后，第一颗新的GPS III卫星计划于12月15日在佛罗里达州卡纳维拉尔角AFS的SpaceX Falcon 9上发射。上个月，洛克希德·马丁公司以15亿美元的价格获得了开发和制造两颗卫星的初步合同，十年之后，它才到达那里。空军目前正在检查卫星，以确保其在发射前能正常运行。目前，GPS管理局局长史蒂芬·惠特尼（Steven Whitney）空军上校一直专注于生产。洛克希德公司正在开发另外9款GPS III，并且毫无争议地竞标制造另一套更先进的11辆GPS。该服务已经接受了第二架太空飞行器，该太空飞船已存放在洛克希德市郊区丹佛市的设施中。卫星3-7处于生产的各个阶段，洛克希德公司正在购买该星座中第9和第10颗卫星的零件。由于五角大楼的一项收购决定稍有暂停，在进行9号和10号卫星之前，资金缺口很大。惠特尼说，该计划正在努力重新鉴定GPS its原子钟的最重要方面之一。

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