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Transmitter-receiver-transmitter-configured ground-penetrating radars over randomly heterogeneous ground models

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Radio Science
Year: 2002 | Volume: 37, Issue: 6 | Journal Article |
Cited by: Papers (1)
Ground-penetrating radar (GPR) problems are simulated using the finite-difference time-domain (FDTD) method. The GPR model is configured with arbitrarily polarized three antennas, two of which are transmitting antennas fed 180° out of phase. The receiver is placed in the middle of two transmitters, where it receives no direct coupling from the transmitting antennas. The ground is modeled as a diel...Show More
In this study a synthetic aperture radar-based reconstruction technique is applied to focus the unwanted disruptive effects in the two-dimensional ground penetrating radar data. The formulation of the applied Matched Filter Algorithm (MFA) which completely removes the hyperbolic effects is presented in detail. To test the capability of the proposed technique an experimental measurement setup is co...Show More
In the classical B-Scan ground penetrating radar (GPR), the collected data represented in the image domain, depict undesired hyperbolic effects and have low resolution features. In this work, we present frequency-wavenumber based Synthetic Aperture Radar (SAR) focusing technique to solve this problem. The formulation of algorithm is given and applied to both the simulation data obtained by a physi...Show More
The most effective way to remove ice jams is the explosive method, the use of which is most appropriate during the ice jam formation period. But it is necessary to know the thickness and volume of the jam-making ice in order to put the optimum quantity of explosive for effective destruction of the ice jam. It is not possible to implement the conventional measuring techniques for the purposes of me...Show More
Antipersonnel mines are hidden weapons that are usually buried close to the surface and are triggered by a foot step of the victim. A sensor that is able to detect minimum metal mines is a ground penetrating synthetic aperture radar (GPSAR). In previous work, an unmanned aerial vehicle (UAV)-based GPSAR was developed and tested for the detection of buried landmines. The real topography was neglect...Show More

Design and realization of a discretely loaded resistive vee dipole for ground-penetrating radars

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Radio Science
Year: 2004 | Volume: 39, Issue: 4 | Journal Article |
A discretely loaded resistive vee dipole (RVD) is designed and realized for use in ground-penetrating radar (GPR) applications. The RVD is a good antenna for GPR applications because it can radiate a temporally short pulse into a small spot on the ground, and its low radar cross section mostly eliminates the multiple reflections between the surface of the ground and the antenna. The antenna presen...Show More

Design and realization of a discretely loaded resistive vee dipole for ground-penetrating radars

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Year: 2004 | Volume: 39, Issue: 4 | Journal Article |

FDTD-SUPML-ADE simulation for ground-penetrating radar modeling

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Radio Science
Year: 2003 | Volume: 38, Issue: 1 | Journal Article |
Cited by: Papers (3)
GPR data simulations require above all an efficient forward modeling algorithm. A Finite Difference Time Domain code is presented with Simplified Unsplit Perfect Matched Layer that leads to insignificant reflections on border with few modifications of the core algorithm. In addition, the Auxiliary Differential Equation method allows GPR simulations including dispersive phenomena that could not be ...Show More

FDTD-SUPML-ADE simulation for ground-penetrating radar modeling

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Year: 2003 | Volume: 38, Issue: 1 | Journal Article |
The clutter in ground-penetrating radar (GPR) images obscures and disguises subsurface target reflections, which greatly challenges the accurate target identification. Conventional clutter removal methods suffer from limited clutter removal capability. They either leave residual clutter or deteriorate target reflections. To address the challenges in suppressing clutter in GPR radargrams, we presen...Show More
The GPR data can be used to image the subsurface structure using a migration algorithm and geometric information, such as the layer structure and relative permittivity (RP) of the medium. The autofocusing (AF) technique can be used to estimate the RP value by iteratively evaluating an AF metric of the migrated image. Because the iterative evaluation is time consuming, it is desired to develop good...Show More
Radar remote sensing of buried targets is widely conducted with ground penetrating radars (GPRs). Synthetic aperture radars (SAR) are widely used for monitoring of disaster, forest coverage, and infrastructure. For future utilization of airborne or spaceborne SAR monitoring of buried target, we investigated how to identify buried target for limited number of scans with using two-dimensional scanni...Show More
De-noising of target echo has attracted plenty of attention in better identification of target signals for ground penetrating radar (GPR). In this paper, a novel de-noising method for GPR signal is proposed. By adding LMS (Least Mean Square) adaptive filtering into wavelet threshold algorithm, both threshold processing of the high-frequency coefficients and filtering of the low-frequency coefficie...Show More
Signal prediction of time-domain (TD) ground-penetrating radar (GPR) installed on drone by employing the ray-tracing technique is proposed. This work employs the TD uniform geometrical theory of diffraction (UTD) method including the geometrical optic (GO) rays tracing technique to find the GPR reflected signal from the ground layer and the underground object. Moreover, the diffracted ray path of ...Show More
Ground Penetrating Radar (GPR) is a key technology for inspecting the underground, as it allows the detection of both metallic and dielectric targets. In the last few years, the integration of GPR systems on board unmanned aerial vehicles (UAVs) has been proposed for the detection of buried explosive threats. These systems can provide high-resolution images of the underground by coherently combini...Show More
This contribution presents the main objectives and achievements of the SAFEDRONE project, devoted to the development of airborne-based high-resolution Ground Penetrating Radar (GPR) systems for the detection of buried landmines and Improvised Explosive Devices (IEDs). The overall goal of the project is to take advantage of the ability of Unmanned Aerial Vehicles (UAVs) to enable a contactless, saf...Show More
In this letter, we apply a time and frequency analysis method based on the complete ensemble empirical mode decomposition (CEEMD) method in ground-penetrating radar (GPR) signal processing. It decomposes the GPR signal into a sum of oscillatory components, with guaranteed positive and smoothly varying instantaneous frequencies. The key idea of this method relies on averaging the modes obtained by ...Show More
This paper presents synthetic aperture radar techniques for impulse ground-penetrating radar system. For test measurements, we used ultra-wide band impulse ground-penetrating radar system to collect A-scan radar data and these data was demonstrated in B-scan image. Synthetic aperture radar algorithm was applied to advance the cross-range and range resolutions.Show More
In this paper, we propose an Elevation-Radial scanned Synthetic Aperture Radar (E-RadSAR) for forward-looking ground penetrating radar (GPR) imaging. The E-RadSAR exploits the advantages of both RadSAR and Elevation-Circular SAR (E-CSAR) by utilizing the SAR technique in the cross- and down-range directions for signal acquisition. It could be implemented with fewer antennas compared to the RadSAR ...Show More

Transmitter-receiver-transmitter configurations of ground-penetrating radar

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Radio Science
Year: 2002 | Volume: 37, Issue: 3 | Journal Article |
Cited by: Papers (2)
Three-dimensional ground-penetrating radar (GPR) geometries are simulated using the finite difference time domain (FDTD) method. The GPR is modeled with a receiver and two transmitters with arbitrary polarizations in order to cancel the direct signals emitted by the two transmitters at the receiver. This GPR configuration is used to simulate scenarios involving single or multiple targets with arbi...Show More

Transmitter-receiver-transmitter configurations of ground-penetrating radar

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Year: 2002 | Volume: 37, Issue: 3 | Journal Article |
Ground Penetrating Radar (GPR) systems have emerged as a reliable and non-destructive tool for subsurface object detection and characterization. In this paper, we present a comprehensive performance evaluation of two different stepped-frequency continuous wave (SFCW) GPR radars in application for detecting buried objects. Radars have the same structure, one is implemented on a single substrate wit...Show More
We have developed an identification method of an underground object form a ground penetrating radar (GPR) image by the deep neural network. In this study, in order to automatically detect an underground object from the GPR image by the DNN, we have generated several hundred thousand GPR images for training the DNN using a fast finite-difference-time-domain (FDTD) simulation with graphics processin...Show More
Ground Penetrating Radar (GPR) is an efficient tool for the detection of underground objects. However, due to electromagnetic attenuation and scattering effects, the detection and identification of the buried objects are often difficult. Radio-Frequency (RF) tagging of the buried pipes and cables is a novel approach to tackle these problems, and generally the enhanced response from the RF tags in ...Show More
This paper presents a printed slot antenna fed by microstrip line with double feeding strip, double-blended shape stub and stripline-loaded structure. Moreover, the reflector is added behind the proposed antenna in order to improve the directivity. The dimensions of the proposed antenna are 28 mm × 32 mm × 188.32 mm. The simulation results show that the proposed antenna achieves a very wide impeda...Show More
This paper reports the main activities planned within the context of the ArchaeoTrack research project. The project aims at creating a new ground-penetrating radar (GPR)-based methodology producing information for use of communities and local administrations within a preventive archaeology perspective. To this aim, the project provides i) identification of the most suitable GPR system for archaeol...Show More
To detect pavement damage of airport taxiway caused by cracks inside layer, we applied a novel method to common midpoint (CMP) dataset obtained by multistatic ground penetrating radar (GPR) system YAKUMO. Thin cracks within asphalt layers cause slight variation to the electromagnetic (EM) signal propagation velocity. The proposed method can show higher-resolution images of velocity changes of two ...Show More