Inverting surface GPR data using FDTD simulation and automatic detection of reflections to estimate subsurface water content and geometry
Inverting surface GPR data using FDTD simulation and automatic detection of reflections to estimate subsurface water content and geometry
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DOI：
10.1190/geo2011-0467.1
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发表时间：
2012-07
期刊：
影响因子：
3.3
通讯作者：
J. Buchner;U. Wollschläger;K. Roth
中科院分区：
文献类型：
--
作者：
J. Buchner;U. Wollschläger;K. Roth
摘要提出了一种新的多天线间隔共偏移距探地雷达反演方法，该方法介于射线追踪反演和全波形反演之间。使用二维时域有限差分模拟的测量建模类似于真实的数据。这些模拟是用参数化的地下模型获得的，该模型由具有恒定介电常数的几个层和层的界面的显式表示组成。然后，自动检测建模的和真实的数据中的反射，并且手动选择真实的数据的感兴趣的反射。迭代地最小化反射波的走时和振幅的平方残差的和以估计地下水含量和几何形状，即，层界面的位置和形状。该方法首先测试了一个合成的数据集，然后应用到一个真实的数据集。比较…
ABSTRACTA new inversion scheme for common-offset ground-penetrating radar measurements at multiple antenna separations was proposed, which is intermediate between inverting of picked reflectors using ray-tracing and full-waveform inversion. The measurements are modeled similarly to the real data using 2D finite-difference time-domain simulations. These simulations are obtained with a parameterized model of the subsurface that consists of several layers with constant dielectric permittivity and an explicit representation of the layers’ interfaces. Then, reflections in the modeled and in the real data are detected automatically, and the reflections of interest of the real data are selected manually. The sum of squared residuals of the reflections’ traveltime and amplitude is iteratively minimized to estimate subsurface water content and geometry, i.e., the position and shape of the layer interfaces. The method was first tested with a synthetic data set and then applied to a real data set. The comparison of ...