Journal ArticleDOI
Pre-stack migration applied to GPR for landmine detection
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TLDR
In this article, a step-frequency continuous-wave array antenna ground penetrating radar system, called SAR-GPR, was developed to acquire common middle point multi-offset data.Abstract:
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.read more
Citations
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Journal ArticleDOI
A Compressive Sensing Data Acquisition and Imaging Method for Stepped Frequency GPRs
TL;DR: A novel data acquisition and imaging method is presented for stepped-frequency continuous-wave ground penetrating radars (SFCW GPRs) and it is shown that if the target space is sparse, it is enough to make measurements at only a small number of random frequencies to construct an image of thetarget space by solving a convex optimization problem which enforces sparsity through lscr 1 minimization.
Journal ArticleDOI
Source location using time‐reverse imaging
TL;DR: In this paper, a chain of time-reverse modeling, image space wavefield decomposition and several imaging conditions is presented as a migration-like algorithm called time reverse imaging, which locates subsurface sources in passive seismic data and diffractors in active data.
Journal ArticleDOI
Multistatic Ground-Penetrating Radar Experiments
TL;DR: Bistatic and multistatic images for the buried targets are very good, and they show the effectiveness of the system and processing.
Journal ArticleDOI
Sparse microwave imaging: Principles and applications
TL;DR: The sparse microwave imaging introduces the sparse signal processing theory to radar imaging to obtain new theory, new system and new methodology of microwave imaging to achieve benefits in several aspects, including improvement of image quality, reduction of data amount for sparse scene and enhancement of system performance.
Journal ArticleDOI
Compressive sensing for subsurface imaging using ground penetrating radar
TL;DR: A novel data acquisition system for wideband synthetic aperture imaging based on CS by exploiting sparseness of point-like targets in the image space by using linear projections of the returned signals with random vectors as measurements.
References
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Book
Antenna Theory: Analysis and Design
TL;DR: The most up-to-date resource available on antenna theory and design as mentioned in this paper provides an extended coverage of ABET design procedures and equations making meeting ABET requirements easy and preparing readers for authentic situations in industry.
Journal ArticleDOI
Integral formulation for migration in two and three dimensions
TL;DR: In this article, the authors discuss the mathematical formulation of migration as a solution to the scalar wave equation in which surface seismic observations are the known boundary values, and the migrated image is expressed as a surface integral over the known seismic observations when areal or 3D overage exists.
Journal ArticleDOI
Velocity variations and water content estimated from multi-offset, ground-penetrating radar
TL;DR: In this paper, the effect of multiple velocity analyses on the stacked radar image and particularly, to demonstrate that this velocity information can also be used to determine subsurface water content.
Journal ArticleDOI
Acquisition and processing of wide-aperture ground-penetrating radar data
TL;DR: In this paper, a 40-channel wide-aperture ground penetrating radar (GPR) data set was recorded in a complicated fluvial/aeolian environment in eastern Canada.