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Ionospheric Bounce

机译：电离层弹跳

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Often maritime patrol aircraft do not patrol; they intercept. Oceans are huge and aircraft are too costly to cover them in their entirety. Instead, the aircraft are cued and directed toward targets that have been economically detected by other means. Australia's Defense Science and Technology Group (DSTG) is developing a specialist over-the-horizon (OTH) skywave radar as one of those other means, exploiting the country's decades of expertise in bouncing high-frequency radio waves off the ionosphere to detect targets perhaps 3,000 km (1,900 mi.) away. The agency, part of the defense department, has built an experimental system with technology for better ship detection and expects to complete a full-scale demonstrator next year. That demonstrator should be close in design and performance to a possible operational ocean-surveillance OTH sensor, says Gordon Frazer, the head of DSTG's high-frequency radar work.
机译：海上巡逻机通常不巡逻；他们拦截。海洋是巨大的，飞机成本太高，无法完全覆盖它们。取而代之的是，将飞机提示并引导至已通过其他方式从经济角度检测到的目标。澳大利亚国防科技集团（DSTG）正在开发一种专用的超视距（OTH）天波雷达，作为其他手段之一，它利用该国数十年来在电离层弹跳高频无线电波的专业知识来检测目标3,000公里（1,900英里）。该机构是国防部的一部分，已经建立了一个具有更好的舰船探测技术的实验系统，并有望在明年完成一个完整的示范机。 DSTG高频雷达工作负责人戈登·弗雷泽（Gordon Frazer）表示，该演示器的设计和性能应与可能使用的海洋监视OTH传感器接近。

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