Northrop Grumman believes that sales of the Global Hawk air vehicles could exceed 200 units.

诺斯罗普·格鲁曼公司相信，“全球鹰”的销售数量可以超过200架。

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Pilots on the ground will control one of NASA's Global Hawk drones as it flies above tropical storms.

地面领航员将控制NASA的全球鹰无人机飞越热带风暴上空。

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NASA charges the same price — US$3, 500per hour — to use the Global Hawk as for various manned aircraft.

根据美国国家航空航天局规定，与有人驾驶飞机使用规则一样，“全球鹰”飞行时每小时收费3500美元。

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The "RQ" designation is used for unarmed drones, such as the RQ-4 Global Hawk.

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The aircraft is one of five aircraft acquired from the Air Force Global Hawk program.

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Each Global Hawk has infra-red and radar sensors, and a surveillance range of 100 miles.

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