This picture, published in Science by Ralph Lorenz of the University of Arizona and his colleagues, is a radar image of Titan, the largest moon of Saturn.

这副被Arizona大学的Ralph Lorenz及其同事发表在《科学》周刊上的图片，是土星的最大卫星——泰坦星上的雷达影像图。

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Spatial spectrum estimation is an important area in array signal processing, which is widely used in radar, communication, sonar, earthquake, chronometer and other aspects of science and technology.

空间谱估计是阵列信号处理的一个重要分支，近年来在雷达、通信、声纳、地震、射线天文等科技领域取得了极为广泛的应用。

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Radar system is a hi-tech system which concentrates many kinds of modern electronic science and technology achievements.

雷达是集中了现代电子科学技术各种成就的高科技系统。

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Science editor Alan Boyle's blog: Radar observations made during this week's close encounter with the asteroid Apophis have ruled out the risk of a collision with Earth in 2036, NASA says.

MSN: How to confirm we've found another Earth - Technology & science - Space - Space.com | NBC News