Radar Imaging for Combatting Terrorism
نویسندگان
چکیده
Radar, and in particular imaging radar, have many and varied applications to counterterrorism. Radar is a day/night all-weather sensor, and imaging radars carried by aircraft or satellites are routinely able to achieve high-resolution images of target scenes, and to detect and classify stationary and moving targets at operational ranges. Short-range radar techniques may be used to identify small targets, even buried in the ground or hidden behind building walls. Different frequency bands may be used, for example high frequencies (X-band) may be used to support high bandwidths to give high range resolution, while low frequencies (HF or VHF) are used for foliage penetration to detect targets hidden in forests, or for ground penetration to detect buried targets. The purpose of this contribution is to review the fundamental principles of radar imaging, and to consider the contributions that radar imaging can make in four specific aspects of counterterrorism: through-wall radar imaging, radar detection of buried targets, tomography and detection of concealed weapons, and passive bistatic radar.
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