Pre-stack migration applied to GPR for landmine detection
Pre-stack migration applied to GPR for landmine detection
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DOI：
10.1088/0266-5611/20/6/s07
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发表时间：
2004-12
期刊：
影响因子：
2.1
通讯作者：
Xuan Feng;Motoyuki Sato
中科院分区：
文献类型：
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作者：
Xuan Feng;Motoyuki Sato
探地雷达(GPR)探测埋藏地雷通常会受到很强的杂波干扰，这会降低GPR数据的图像质量。在用探地雷达成像陡峭倾斜的地雷时也会遇到问题。为了解决这些问题，我们研制了一种步进频率连续波阵天线探地雷达系统，该系统可以获取共同的中点多偏移距数据。作为一般波场反演问题的近似解，采用偏移算法对散布的地雷信息进行重新聚焦，以提高信号杂波比，重建地雷图像。此外，叠前偏移被发现能有效地处理急倾斜的地雷问题。在偏移处理之前，使用减去天线耦合。在两种情况下对SAR-GPR系统进行了测试。第一种情况是模拟粗糙地面条件下的非均质土，第二种情况是模拟急倾斜埋藏的地雷。在第一种情况下，探地雷达数据表现出非常强的杂波。经过叠前偏移后，两次实验均有效地抑制了强杂波，重建了高质量的地雷图像。
Detection of buried landmines by ground penetrating radar (GPR) normally suffers from very strong clutter that will decrease the image quality in GPR data. Problems are also encountered when imaging steeply dipping landmines by GPR. To solve these problems, we have developed a stepped-frequency continuous-wave array antenna ground penetrating radar system, called SAR-GPR, that can acquire common middle point multi-offset data. As an approximate solution to the general wavefield inversion problem, migration algorithms were used to refocus the scattered landmine information to improve signal–clutter ratio and re-construct the landmine image. Also, pre-stack migration was found to efficiently deal with the steeply dipping landmine problem. Before migration processing, subtracting antenna coupling was used. The SAR-GPR system was tested under two conditions. The first condition is designed to simulate inhomogeneous soil under rough ground conditions and the second condition is to simulate steeply dipping buried landmine. Very strong clutter in the GPR data was exhibited in the first condition. After pre-stack migration, strong clutter was efficiently suppressed and a high quality landmine image was re-constructed in both experiments.