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首页> 外文期刊>Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of >A 3-D High-Order Reverse-Time Migration Method for High-Resolution Subsurface Imaging With a Multistation Ultra-Wideband Radar System
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A 3-D High-Order Reverse-Time Migration Method for High-Resolution Subsurface Imaging With a Multistation Ultra-Wideband Radar System

机译：具有多个超宽带雷达系统的高分辨率地下成像的三维高阶逆向时间迁移方法

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摘要

A three-dimensional high-order reverse-time migration (3-D HO-RTM) method is proposed to perform subsurface electromagnetic imaging with an ultra-wideband radar (UWBR) system consisting of a multi-input and multi-output antenna array. By using a UWBR system to collect temporal scattering signals, subsurface targets can be detected, and the image of targets can be obtained by imaging methods such as the back-propagation method, frequency-wavenumber migration technique, time-reversal mirror, and reverse-time migration method. The proposed HO-RTM method is based on the high-order finite-difference time-domain (HO-FDTD) method to significantly reduce the computational cost in the conventional RTM method. The measured data from an experimental lunar exploration system Chang'E-5 have been collected on a 7 m x 2.5 m x 2.5 m laboratory model with volcanic ash and validated by the 3-D HO-RTM method. Results show that all buried objects can be effectively identified by the HO-RTM, and its computer memory and CPU time are only 3.87% and 0.7128% of the conventional RTM method, respectively.
机译：提出了一种三维高阶逆向时间迁移（3-D HO-RTM）方法，用于使用由多输入和多输出天线阵列组成的超宽带雷达（UWBR）系统进行地下电磁成像。通过使用UWBR系统来收集时间散射信号，可以检测到地下目标，并且可以通过成像方法，例如背部传播方法，频率 - 波数迁移技术，时间反转镜和反向来获得目标图像。时间迁移方法。所提出的HO-RTM方法基于高阶有限差分时域（HO-FDTD）方法，以显着降低传统的RTM方法中的计算成本。来自实验月球勘探系统的测量数据Chang'e-5已经用火山灰收集在7米×2.5米×2.5米实验室模型上，并通过3-D Ho-RTM方法验证。结果表明，所有埋地物体都可以通过HO-RTM有效地识别，其计算机存储器和CPU时间分别仅为常规RTM方法的3.87％和0.7128％。

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