The antenna introduced in this paper is different from the ordinary reconnaissance radar, which is a passive antenna receptive system receiving target radar signals.

本文所介绍的天线有别于一般的侦察雷达，是一种无源的接收目标雷达信号的天线接收系统。

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The key techniques of automatic target identification in non-tracking emplacement reconnaissance radar are static background clutter processing and identification of target signals.

基于背景杂波的处理和目标信号的识别，讨论了非跟踪体制炮位侦察雷达目标的自动识别问题。

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The purpose of reconnaissance system's information processing is signal recognition, which is also a key step in whole process of radar reconnaissance information processing.

信号识别是侦察系统信号处理的目的，是整个雷达对抗信号处理中关键性的一个环节。

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In the UK, they were phased out as front-line bombers by the end of 1961, but about 50 were kept on for training, photographic reconnaissance, communications and jamming enemy radar.

BBC: NEWS | UK | Fact file: Canberra PR9

Using a ground-piercing radar sensor aboard the Mars Reconnaissance Orbiter, a team of scientists created 3-D maps of an equatorial region known as Elysium Planitia and the channels that run underneath the plains.

NPR: Radar Reveals Apparent Buried Channels On Mars

Data from the Sharad (SHAllow RADar) instrument (on Mars Reconnaissance Orbiter), document that some of these glacial-like features, which you find at Mars' mid-latitudes, have a significant volume of ice left below a surface of rock debris.

BBC: Q&A: Liquid water on Mars