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・ Northrop Gamma
・ Northrop Grumman
・ Northrop Grumman B-2 Spirit
・ Northrop Grumman Bat
・ Northrop Grumman E-10 MC2A
・ Northrop Grumman E-2 Hawkeye
・ Northrop Grumman E-8 Joint STARS
・ Northrop Grumman EA-6B Prowler
・ Northrop Grumman Electronic Systems
・ Northrop Grumman Firebird
・ Northrop Grumman Guardian
・ Northrop Grumman MQ-4C Triton
・ Northrop Grumman MQ-8 Fire Scout
・ Northrop Grumman MQ-8C Fire Scout
・ Northrop Grumman RQ-180
Northrop Grumman RQ-4 Global Hawk
・ Northrop Grumman Ship Systems
・ Northrop Grumman Switchblade
・ Northrop Grumman X-47A Pegasus
・ Northrop Grumman X-47B
・ Northrop Grumman X-47C
・ Northrop High School
・ Northrop HL-10
・ Northrop JB-1 Bat
・ Northrop Loom
・ Northrop M2-F2
・ Northrop M2-F3
・ Northrop N-102 Fang
・ Northrop N-1M
・ Northrop N-3PB


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Northrop Grumman RQ-4 Global Hawk : ウィキペディア英語版
Northrop Grumman RQ-4 Global Hawk


The Northrop Grumman RQ-4 Global Hawk is an unmanned (UAV) surveillance aircraft. It was initially designed by Ryan Aeronautical (now part of Northrop Grumman), and known as Tier II+ during development. The Global Hawk performs a similar role as the Lockheed U-2. The RQ-4 provides a broad overview and systematic surveillance using high-resolution synthetic aperture radar (SAR) and long-range electro-optical/infrared (EO/IR) sensors with long loiter times over target areas. It can survey as much as of terrain a day.
The Global Hawk is operated by the United States Air Force. It is used as a high-altitude platform covering the spectrum of intelligence collection capability to support forces in worldwide military operations. According to the United States Air Force, the superior surveillance capabilities of the aircraft allow more precise weapons targeting and better protection of friendly forces. Cost overruns led to the original plan to acquire 63 aircraft being cut to 45, and to a 2013 proposal to mothball the 21 Block 30 signals intelligence variants.〔 Each aircraft was to cost US$60.9 million in 2001,〔("Soaring Costs Not Likely to Slow Down Global Hawk" ). ''National Defence Magazine'', May 2006.〕 but this had risen to $222.7 million per aircraft (including development costs) by 2013.〔 The U.S. Navy has developed the Global Hawk into the MQ-4C Triton maritime surveillance platform.
==Development==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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