To determine once and for all whether the Ho 2-29 had stealth capabilities, experts first examined the surviving 2-29 and probed it with a portable radar unit based on World War II radar tech.

为一劳永逸终结关于Ho 2 - 29是否具备隐形能力的争议，专家们第一次检验了那架幸存2 - 29。并以当时二战雷达技术为基础用一架便携式雷达对它作了测试。

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It incorporates active radar with an inertial reference unit and micro-computer system, which makes the missile less dependent upon the fire-control system of the aircraft.

它把主动雷达和一个被动参考单元以及微电脑系统结合在一起，可使得导弹更少的依靠飞机上的发射控制系统。

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Through making sure of detecting air attack weapon distance, enter direction by radar, projective shortcut of firepower unit fairway, the air defense situation was simulated.

通过对雷达发现空袭兵器距离、空袭兵器进入方向、火力单元航路投影捷径的确定来对空情进行模拟。

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Conventional defence systems use one rotating radar unit to find a target and a second to subsequently track it for risk assessment.

BBC: News | In Depth | Military Fact Files

Today, thanks to radar and interplanetary spacecraft, the astronomical unit is known with a precision of one part in 50 billion.

ECONOMIST: Transits of Venus

On Day 44 of the trek, both a radar device meant to measure the ice thickness and a satellite communications unit to relay the data are still not working - despite being brought back to the UK for repairs and then delivered to the team last week.

BBC: Arctic team gives up on ice radar