# 2018 17th International Conference on Ground Penetrating Radar (GPR)

## Filter Results

Displaying Results 1 - 100 of 161
• ### [Title page]

Publication Year: 2018, Page(s): 1
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Publication Year: 2018, Page(s): 1
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Publication Year: 2018, Page(s): 1
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• ### Introduction

Publication Year: 2018, Page(s): 1
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• ### GPR full-waveform inversion, recent developments, and future opportunities

Publication Year: 2018, Page(s):1 - 6
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Ray-based, or approximate, forward modeling techniques have often been used to reduce computational demands for inversion purposes. Due to increasing computational power and possible parallelization of inversion algorithms, accurate forward modeling can be included in advanced inversion approaches such that the full-waveform can be exploited. Here, recent developments of full-waveform ground penet... View full abstract»

• ### A high-stability dual-chip GPR for cooperative target probing

Publication Year: 2018, Page(s):1 - 4
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A complete Ground Penetrating RADAR (GPR) system, including emitter, receiver and processing circuit, has been assembled with minimum part numbers for a compact, low power solution aimed at probing passive cooperative targets acting as sub-surface sensors. The high timing stability of the recorded signal needed for phase analysis is met by clocking all circuits, including the stroboscopic timer, w... View full abstract»

• ### Modeling of 3D stochastic fracture media and calculation of GPR response

Publication Year: 2018, Page(s):1 - 6
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Detection of weak zone is an important issue, this dissertation proposed a three-dimensional Koch curve to simulate the fracture zones of different moisture content, using the stochastic equivalent medium to establish geological background. A three-layers-soil moisture content model was established, with different oblique fissure zone, on the basis of numerical simulation of ground penetrating rad... View full abstract»

• ### No-contact GPR for investigating painted walls

Publication Year: 2018, Page(s):1 - 6
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In this paper a no-contact ground penetrating radar for investigating painted walls is presented. It operates at 10 GHz central frequency with 4 GHz bandwidth. Its mechanical positioner is able to scan a surface 1.4 m wide and 1.9 m high. This equipment has been specifically designed for investigating the painted walls of the Tutankhamon tomb in the Kings' valley in Egypt. The aim of this radar su... View full abstract»

• ### Lunar Regolith Penetrating Radar on the Lander for Chang'E-5 Mission

Publication Year: 2018, Page(s):1 - 4
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Lunar Regolith Penetrating Radar (LRPR) is one payload of Lander for Chang'E-5. LRPR's scientific missions are: (1) providing information support for drill and sampling device; (2) sounding lunar regolith thickness and structure below the Lander area, which is covered by radar's antenna. In order to obtain detection data effectively, it is necessary to overcome the problem that the Lander cannot m... View full abstract»

• ### Research on the Geological Radar Antenna for Application in Full Space of Mine Roadway

Publication Year: 2018, Page(s):1 - 4
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The hidden geological disaster sources lead to frequent safety accident in mine, and the geological radar technology is widely used in the detection of geological structure and hidden disaster sources. This paper designs a geological radar antenna and shielding device for full space of mine roadway, aiming to improve the accurate identification ability for small target. The main frequency of the a... View full abstract»

• ### The Development of Multi-pass GPR System Using Short Chirp Signal

Publication Year: 2018, Page(s):1 - 7
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In recent years, there are many accidents caused by roadway cave-ins where the roads were constructed in the past. So the GPR is used as a way to detect the underground cavities for preventing accidents in the future. In the past, when handheld GPR was used, it was necessary to block traffic temporarily to detect underground cavities. However, nowadays the vehicle towed GPR system is used in order... View full abstract»

• ### Irregular changes in antenna height during high speed scanning as a source of essential errors in measuring the thickness of asphalt

Publication Year: 2018, Page(s):1 - 4
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The use of ground-based radar (GPR) to scan the subsurface pavement structure allows to diagnose the road surface, determine the thickness of pavement layers, assess the existence of structural disturbances under the road surface, and so on. Network scale GPR scanning are performed at high speed using an air-coupled (horn) antennae in order to avoid interference with traffic. The requirement of th... View full abstract»

• ### GPR tomography in a water saturated context using a 13 boreholes configuration

Publication Year: 2018, Page(s):1 - 4
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This study takes part in an integrated project whose goal is to characterize the permeability heterogeneity controlling the water flow in a saturated environment. Our approach, as part as this project, is based on the use of ground penetrating radar (GPR) in order to determine the water content by means of an EM velocity model. We investigate a porous, permeable and water saturated formation (bioc... View full abstract»

• ### A m-sequence UWB radar system design and contrast test with an impulse radar

Publication Year: 2018, Page(s):1 - 4
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UWB radar is widely used ranging from tracing through the wall, anti-terrorist stabilization, earthquake and disaster relief to archaeological discoveries and geological surveys. In this paper, a m-sequence UWB radar is designed to solve the problem of detection range and resolution, and to meet the relatively simple structure and can be applied to a variety of application scenarios. Finally, the ... View full abstract»

• ### An FPGA-based Flexible and MIMO-capable GPR System

Publication Year: 2018, Page(s):1 - 6
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Ground penetrating radar (GPR) has broad applications in non-destructive subsurface imaging. Most GPRs on the market are bistatic devices that illuminate the buried objects using analog pulses with simple Gaussian-like shapes. These GPRs suffer from drift in the scan results and have either a low-resolution or a low depth of scan, which limits their application. High resolution along with an incre... View full abstract»

• ### Field Experiments Using a Pulse Directional Borehole Radar System with a Dipole Array Antenna

Publication Year: 2018, Page(s):1 - 4
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A new design for a pulse directional borehole radar with a dipole array antenna is proposed and tested. In this radar, a pulse generator excites a pulse, with peak voltage of 110 V and low jitter at a feeding point of the transmitter. The receiver measured the difference of arrival times at several receiving dipole elements to estimate the direction of the arrival wave. We compensated for time del... View full abstract»

• ### Initial Laboratory Field Tests of the Rover-mounted GPR for China's First Mission to Mars

Publication Year: 2018, Page(s):1 - 4
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China's first Mars probe including an orbiter and a landing rover will be launched by 2020. A subsurface penetrating radar instrument has been selected to be a part of payload on the rover. The main scientific objective of the SPR is to characterize the thickness and sub-layer distribution of the Martian soil. The SPR consists of two channels. The low frequency channel of the SPR will provide a pe... View full abstract»

• ### Optimization of Sampling Converter for GPR Receiver

Publication Year: 2018, Page(s):1 - 4
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The paper discusses the criteria of the optimal sample width for sampling (equivalent time) GPR receiver. The Pearson correlation coefficient is proposed as an optimum criterion. The influence of noise on the choice of the optimal sample width is analyzed. Suggested methodology is illustrated on sampling conversion of a Gaussian signal and a signal with reflection. View full abstract»

• ### Estimation of Lane Width for Object Detection Using Impulse GPR with “1Tx and 4Rx” Antenna System

Publication Year: 2018, Page(s):1 - 5
Cited by:  Papers (1)
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This paper reports on an experimental study of object detection and location using UWB Impulse GPR with a specialized “1Tx and 4Rx” antenna system. Algorithms for data collection and processing are described. The results of the study demonstrate the ability of the radar to cover a lane width of more than 60 cm with the antenna array at a height of 37 cm. Within the lane the system can readily dete... View full abstract»

• ### Comparison of GPR and Capacitance Probe laboratory experiments in sandy soils

Publication Year: 2018, Page(s):1 - 5
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The integration of different techniques for the estimation of the volumetric water content θ in low-loss sandy soils may allow to obtain more reliable measure, after a proper evaluation of the techniques limits and their pros and cons. In particular, the integration of direct laboratory measurements performed on samples$\theta$values measured) with geophysical data collected on a soil c... View full abstract»

• ### An improved airborne VHF radar sounder for ice and desert exploration

Publication Year: 2018, Page(s):1 - 4
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The paper deals with a VHFairborne radar sounder designed for the exploration of ice sheets and arid sub-surfaces. This radar is an improved version of a previously developed prototype and is the product of a project financed by the Italian Space Agency and carried out thanks to the cooperation of Italian research units. The main characteristics of the radar, and a calibration measureme... View full abstract»

• ### Comparison of pulsed and stepped frequency continuous wave (SFCW) GPR systems

Publication Year: 2018, Page(s):1 - 4
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The use of Ground Penetrating Radar (GPR) in structural investigations is based on the detection of features., embedded objects and flaws that cause a reflection of the transmitted electromagnetic wave. Construction types may vary from concrete to masonry and rock and possible targets include metallic reinforcements., ducts., plastic pipes., air voids., as well as the boundaries of the object itse... View full abstract»

• ### Minimum threshold for the sampling rate to prevent amplitude distortions in aliasing-free GPR surveys

Publication Year: 2018, Page(s):1 - 6
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We study sampling-related amplitude distortions within aliasing-free GPR data sets, and compare them with other factors which can affect the recorded signal. In particular, we analyze how much the sampled peak amplitudes can change with different sampling rates., and recommend a minimum threshold for the sampling rate in order to contain the maximum peak amplitude error within acceptable limits. T... View full abstract»

• ### Application of the Attribute Analysis for Interpretation of GPR Survey Data

Publication Year: 2018, Page(s):1 - 4
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An investigation of extended road surfaces with artificial pavement, as well as of railways, airfield runways and monolithic concrete structures when searching for defects, cracks and voids in the pavement, or locating weakness zones in high humidity areas and sub-base subsidences. The application of an Attribute Analysis for interpreting data obtained while Ground Penetrating Radar (GPR) surveyin... View full abstract»

• ### Structural Planes Parameters Extraction Method Based on Borehole Digital Optical Image and GPR

Publication Year: 2018, Page(s):1 - 6
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This paper combines the borehole ground penetrating radar imaging and digital optical borehole imaging, presents an efficient method to recognize and extract the structural planes parameters of rock mass. In this method, it's necessary to transform the digital optical image in color modeling. Processing such as segmentation and edge refinement are essential steps. Afterwards, matching algorithm is... View full abstract»

• ### Application of Synchrosqueezing Short Fourier transform analysis in Ground Penetrating Radar thin layer Recognition

Publication Year: 2018, Page(s):1 - 5
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In order to meet the need of actual exploration, this paper makes a deep study of the thin layer's electromagnetic reflection properties. The Synchrosqueezing Short-Time Fourier Transform (SSTFT) is introduced into the thin layer identification. This method is highly adaptive to the given signal and makes the time-frequency plot more sharpen. Even the layer with the thickness of$\lambda/8$ View full abstract»

• ### Analysis and Calibration of Ground Penetrating Radar Shielded Antennas

Publication Year: 2018, Page(s):1 - 4
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Ground-Penetrating Radar (GPR) is a non-destructive geophysical method applied in many civil engineering applications. The knowledge of the GPR antennas behavior is crucial to obtain accurate results and comprehensive data interpretations. However, the age of the antennas and the use can modify the values provided by manufacturers. Consequently, calibration of antennas is recommended. Calibration ... View full abstract»

• ### Reverse Time Migration of Crosswell GPR Data Based on Wavefield Decomposition

Publication Year: 2018, Page(s):1 - 4
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Reverse-time migration (RTM) has been widely used for imaging subsurface structure in seismic surveys for hydrocarbon resource explorations. It has been adopted for migrating ground penetrating radar (GPR) data due to the kinematics and dynamics similarity between electromagnetic and seismic waves. Low-frequency migration artifacts happen when the conventional image condition is used, especially w... View full abstract»

• ### A novel interferometry positioning and tracking method with short baseline for UWB through-the-wall radar system

Publication Year: 2018, Page(s):1 - 4
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A new interferometry positioning and tracking method with short baseline for ultra-wideband (UWB) through-the-wall radar system is proposed in this paper. To improve the accuracy of two-dimensional positioning and tracking, the high-precision distance difference of the two receiving antennas is obtained by interferometry. The accurate two-dimensional position can be acquired by the trilateration w... View full abstract»

• ### Study of object recognition with GPR based on STFT

Publication Year: 2018, Page(s):1 - 4
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Ground Penetrating Radar has been widely used in nondestructive testing, but its interpretation is difficult. This text put forward to the algorithm of recognizing object based on short-time Fourier transform (STFT), the signal is analyzed in time-frequency domain to obtain the rolling spectrum, and then calculated threshold using Otsu arithmetic to convert to binary number, so that the object can... View full abstract»

• ### A Multi - frequency GPR Data Fusion Method for Underground Disease Detection

Publication Year: 2018, Page(s):1 - 4
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This pa per presents a novel multi - frequency GPR data fusion method, aiming to solve the problem of misjudgment and missed judgment due to single frequency GPR data used in the disease detection. Compared with the data before fusion, the image quality and image interpretation accuracy of the fused data is obviously improved. For design validation, field detection experiments are conducted, and t... View full abstract»

• ### Migration Deconvolution of Ground Penetrating Radar (GPR) Data

Publication Year: 2018, Page(s):1 - 4
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Migration of ground penetrating radar (GPR) data transforms the event occurred in the subsurface to the real location in either space or time domain, it provides more accurate image of subsurface. In order to improve the migration image quality, a deblurring filter is designed to deblur the reverse time migration (RTM) image. Numerical example demonstrates the deblurred RTM image is much improved,... View full abstract»

• ### Lunar Penetrating Radar Data Processing and Analysis Based on CEEMD

Publication Year: 2018, Page(s):1 - 4
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Knowledge of the subsurface structure not only provides important information on lunar geology, but also is critical for quantifying potential resources for lunar exploration and engineering for human outposts. The dual-frequency lunar penetrating radar (LPR) aboard the Yutu rover provides a unique opportunity to map subsurface structure to a depth of several hundreds of meters from the low-freque... View full abstract»

• ### Combination of Support Vector Machine and H-Alpha Decomposition for Subsurface Target Classification of GPR

Publication Year: 2018, Page(s):1 - 4
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Subsurface target classification of GPR is a hot topic of geophysical field which is aimed to classify different kinds of targets based on their attributes, such as polarimetric attributes and geometrical features, although the existing methods can classify different targets, but they are not efficient and intelligent enough, especially in dealing with data of large amounts. Support Vector Machine... View full abstract»

• ### Study on Polarization Rotation of Electromagnetic Plane Wave from Rough Surface

Publication Year: 2018, Page(s):1 - 4
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Polarimetric technology has attracted huge attention in the Ground Penetrating Radar (GPR) community during recent decades. Polarization signal analysis has been applied to identify subsurface fractures, pipes, and unexploded ordnance. But there are many factors that can cause distortion of the polarization information, such as the ground surface and the soil. In order to obtain more accurate scat... View full abstract»

• ### Dry snow permittivity evaluation from density: A critical review

Publication Year: 2018, Page(s):1 - 5
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Ground Penetrating Radar (GPR) surveys on alpine snow enable a rapid evaluation of snow thickness but necessitate a measurement of the wave velocity in the snowpack. Such quantity is often evaluated from density measurements, using the relationships connecting snow permittivity and density present in literature. Unfortunately such equations provide different results and are rarely reported with an... View full abstract»

• ### Full-polarimetric GPR for detecting ice fractures

Publication Year: 2018, Page(s):1 - 4
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The real-time monitoring of ice fracture width and direction is of great significance for the safety of Antarctic scientific expedition and the understanding of the process of ice fracture induced by avalanches. Using full-polarimetric ground penetrating radar (GPR) system to detect ice cracks, the scattering matrix is obtained and processed by polarization decomposition. Compared with the traditi... View full abstract»

• ### Underground Compactness Inversion Algorithm Based on Hilbert Marginal Spectrum

Publication Year: 2018, Page(s):1 - 4
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Underground caves often cause road collapse. In order to prevent the road surface subsidence, the Hilbert marginal spectrum of ground penetrating radar data can be used to find underground caves. First, the intrinsic mode function was got by the empirical mode decomposition of the GPR data. By summing the marginal spectrum of the intrinsic mode function, the marginal spectrum of the GPR data can b... View full abstract»

• ### Borehole Radar Data Processing Based on Empirical Mode Decomposition

Publication Year: 2018, Page(s):1 - 4
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Borehole radar (BHR) is a highly efficient geophysical exploration tool, however, the application is limited due to relatively small signal to noise ratio (SNR) of the testing data. Empirical Mode Decomposition (EMD) is a data processing method, which takes the particular advantage in analyzing the nonlinear and non-stationary data. This paper introduces the fundamentals of EMD method and the comp... View full abstract»

• ### Estimating moisture changes in concrete using GPR velocity analysis: potential and limitations

Publication Year: 2018, Page(s):1 - 6
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Chloride-induced corrosion of steel is a key problem for reinforced concrete buildings such as bridges. Here, the moisture conditions are of major interest because they are closely related to chloridization and its tempo-spatial variability. Ground-penetrating radar (GPR) is commonly used for extensive non-destructive imaging of small-scale structural defects in concrete. To identify the potential... View full abstract»

• ### Tracing the Layer Boundary of the Ice Sheet from Radio-Echo Sounding Data

Publication Year: 2018, Page(s):1 - 4
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Based on a compartmental model and the dielectric properties of the ice sheet, this paper presents a layer boundary tracing method for tracing the boundaries of different dielectrics of the ice sheet. In this paper, the empirical mean curve decomposition (EMCD) method is used to extract the slowly-varying envelope of radio-echo sounding (RES) signal to build a comparmental model of RES data and re... View full abstract»

• ### A modified algorithm for accurate GPR wave velocity estimation with common offset setting antenna

Publication Year: 2018, Page(s):1 - 6
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Accurate wave velocity estimation is an important part to determine the quality and reliability of GPR survey results, such as positioning of underground utility and characterization of materials. An algorithm was proposed to estimate the velocity accurately by modeling the GPR signal travel path. Both the effects of factors of antenna separation and radius of cylindrical target were taken into ac... View full abstract»

• ### RGPR — An open-source package to process and visualize GPR data

Publication Year: 2018, Page(s):1 - 4
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RGPR, the first ground-penetrating radar (GPR) data processing package written in the R language, is presented. R is a free and open-source high-level programming language for statistical computing. RGPR is built around two main classes to process and visualize GPR data as well as to keep track of the processing steps. Although RGPR is still a work in progress, many of the basic processing methods... View full abstract»

• ### Underground Compactness Inversion Algorithm Based on Hilbert Marginal Spectrum

Publication Year: 2018, Page(s):1 - 4
| | PDF (4804 KB) | HTML

Underground caves often cause road collapse. In order to prevent the road surface subsidence, the Hilbert marginal spectrum of ground penetrating radar data can be used to find underground caves. First, the intrinsic mode function was got by the empirical mode decomposition of the GPR data. By summing the marginal spectrum of the intrinsic mode function, the marginal spectrum of the GPR data can b... View full abstract»

• ### Full-polarimetric Ground Penetrating Radar Underground Objects Classification Using Random Forest

Publication Year: 2018, Page(s):1 - 5
| | PDF (2102 KB) | HTML

In recent years, some people have applied the full-polarimetric GPR into the classification of underground objects and obtained good results. However, with the increase of the volume of data, the efficiency of calculation will decrease. Random forest is a method for large volume data and has been widely used in remote sensing. In this paper, we used the random forest for the classification of unde... View full abstract»

• ### Noise suppression of GPR data using Variational Mode Decomposition

Publication Year: 2018, Page(s):1 - 4
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Ground penetrating radar (GPR) has been used in the many aspects, such as civil engineering and the earth sciences. And the analysis and noise suppression of GPR data have always been the research focus. In this study, a new self-adaptive time-frequency decomposition tool called the variational mode decomposition (VMD) is introduced. We use the VMD method to derive a set of stationary sub-componen... View full abstract»

• ### Monitoring salt tracer transport in granite rock using ground penetrating radar reflection imaging

Publication Year: 2018, Page(s):1 - 6
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Investigating preferential flow paths and fractures in rock formations is a crucial task in ongoing research for geothermal reservoir characterization. The work presented here relies on ground penetrating radar (GPR) surveys to monitor salt tracer flow in weakly fractured crystalline rock. Using borehole antennas in single-hole reflection mode an injected tracer is monitored over time by exploitin... View full abstract»

• ### Frequency Domain Reverse Time Migration of GPR with Attenenuation Compensation

Publication Year: 2018, Page(s):1 - 4
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High computational cost is always a critical concern for reverse-time migration (RTM), and prevents its applications to ground penetrating radar (GPR). To address this challenge, a frequency domain RTM algorithm based on the layered medium dyadic Green's function (DGF) is proposed for high-resolution and efficient subsurface imaging using GPR. To mitigate the amplitude distortion in lossy media, t... View full abstract»

• ### PondView: Intuitive and Efficient Visualization of 3D GPR Data

Publication Year: 2018, Page(s):1 - 6
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The demand for high resolution 3D GPR imaging of the subsurface results in the acquisition of large datasets in utility mapping, archeological prospection, and concrete structural inspection. Visualization, analysis, and interpretation of such data is plagued by the need of high-end hardware and software, limited survey size for smooth user interaction, and the loss of resolution and low amplitude... View full abstract»

• ### Detection of Top Coal by Conductively-Guided Borehole Radar Waves: Results from Numerical Modelling

Publication Year: 2018, Page(s):1 - 6
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Damage to the tops of coal seams caused by incorrect blast stand-off distances is a serious issue in the Australian coal industry, costing the equivalent of about one open cut mine for every 10 operating mines in lost coal. To date, no effective and economically-sound techniques have been found to map and characterize coal seam structures in the open cut environment. We propose to use conductively... View full abstract»

• ### Ellipse-inscribed line-element migration, ELM: a nonparametric object-periphery reconstruction method with multi-static GPR

Publication Year: 2018, Page(s):1 - 4
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A synthetic aperture method for multi-static GPR was proposed: it enables a nonparametric reconstruction of upper surface periphery in the vertical section of buried objects by migrating line-elements. The line-elements are estimated by the following reflection principle. Let's assume two TX/RX antennas with different TX/RX distances: in this paper, one pair was assumed to be a monostatic antenna ... View full abstract»

• ### Quantitative 3-D GPR analysis to estimate the total volume and water content of a glacier

Publication Year: 2018, Page(s):1 - 6
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We apply an automated picking and inversion algorithm to a 3-D GPR data set acquired on an alpine glacieret, to study its internal stratigraphy, density distribution, total volume, and water content. GPR surveys are particularly useful for glaciological studies, since the transmitted signal can propagate efficiently through the entire glacier volume, while the large number of recorded traces makes... View full abstract»

• ### Weighted-averaging operators for accurate 2.5D finite-difference frequency domain radar waves modeling

Publication Year: 2018, Page(s):1 - 6
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We propose an algorithm to accurately solve the frequency domain electromagnetic wave equation by finite-differences in 2.5D. The algorithm is based on previously published methods for viscoelastic waves, and relies on a nine-point stencil to build weighted-averaging numerical operators. The weights are chosen to minimize numerical dispersion and anisotropy, which allows relaxing the requirements ... View full abstract»

• ### Calculation of the Transient Electric Field Transmitted in a Lossy Medium Radiated by an Equivalent GPR Dipole Antenna

Publication Year: 2018, Page(s):1 - 5
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The paper deals with the characterization of electric field radiated by a GPR antenna and transmitted into a lossy medium. Realistic bow-tie GPR antenna is modeled as an equivalent dipole antenna with current distribution governed by Hallen integral equation. Electric field transmitted into a lossy medium is determined using Boundary Element formalism for the solution of field integral formulas. E... View full abstract»

• ### A Novel Forward Model of Ground Penetrating Radar In The Far Field

Publication Year: 2018, Page(s):1 - 6
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Ground Penetrating Radar (GPR) is a widely used Non-Destructive Testing (NDT) tool. It is crucial to construct an appropriate GPR forward model for accurately estimating the electric properties of the subsurface layered media. In this paper, we developed a novel forward model for quasi mono-static configuration GPR based on a recently developed modeling approach for zero-offset mono-static configu... View full abstract»

• ### Full Waveform Inversion of Cross-hole Radar Data Using Envelope Objective Function

Publication Year: 2018, Page(s):1 - 5
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The full waveform inversion (FWI) has been used as a high resolution imaging method for cross-hole radar inversion implementation, however, when FWI is used to process field data, it encounters a variety of problems and causes the inversion to fall into a local minimum. One problem is that the GPR data lacks low frequency information. An effective way is to provide an accurate initial model for FW... View full abstract»

• ### 3D Pre-stack Reverse Time Migration of Ground Penetrating Radar for Subsurface Imaging

Publication Year: 2018, Page(s):1 - 4
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Due to the huge computational cost, reverse time migration (RTM) of ground penetrating radar (GPR) is usually implemented in its two-dimensional (2D) form. However, a 2D RTM algorithm can hardly focus the scattered signal from a object buried in a complicated subsurface environment. This paper proposes a 3D RTM algorithm for GPR based on the high-order finite difference time domian (FDTD) method. ... View full abstract»

• ### Determination of Complex Permittivity by Inverting Coaxial Transmission Line Data Using FDTD

Publication Year: 2018, Page(s):1 - 6
Cited by:  Papers (1)
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The coaxial transmission line measurement is the most common technique to measure the permittivity of granular materials in wideband. The technique measures S-parameters of a coaxial line filled with a material by vector network analyser. An analysis is required for determining the complex permittivity of the material from the measured S-parameters. The paper proposes a new analysis method, which ... View full abstract»

• ### High-Performance Numerical Simulation of Radar Wave Scattering due to Topographic Roughness

Publication Year: 2018, Page(s):1 - 4
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This paper focuses on the study of the scattering of radar waves due to rugged topography relief. It is a helpful assistance to identify features in GPR reflection profile to separate true subsurface reflectors and artifacts caused by surface scatterers. Two examples are presented here to illustrate the approach. The first case is for a numerical simulation of the edge diffraction from rugged topo... View full abstract»

• ### New improvements to the borehole radar tomography package bh_tomo

Publication Year: 2018, Page(s):1 - 6
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New modules were added to the borehole radar tomography package bh_tomo over the past years to perform time-lapse tomography, tomography in elliptically anisotropic media and to account for 3D models. This paper contains details about the implementation of these new modules and shows some examples of the updated user interface. View full abstract»

• ### Advanced Three-Dimensional Microwave Tomography for the Imaging of Buried Targets

Publication Year: 2018, Page(s):1 - 4
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The imaging of buried targets by means of Ground Penetrating Radar (GPR) surveys is typically affected by nonideal and critical operational conditions. The targets are often located in the near-field region of the illuminating antennas, having size comparable to the probing wavelengths and, thus, to the resolution limits of the considered system. In this work, we investigate the improvements obtai... View full abstract»

• ### Error estimation of velocities derived from FDTD simulated multi-offset GPR data

Publication Year: 2018, Page(s):1 - 4
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Finite Difference (FDTD) simulations are used in order to estimate the errors for the velocity determination from multi-offset data for an underground medium with strong velocity contrasts and dips. A method for the automatic velocity determination from multi offset data is presented which takes into account both dip corrections and long offset approximations. Different synthetic models with both ... View full abstract»

• ### A Huygens subgridding approach for efficient modelling of Ground Penetrating Radar using the Finite-Difference Time-Domain method

Publication Year: 2018, Page(s):1 - 6
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Numerical modelling of Ground Penetrating Radar (GPR) using the Finite-Difference Time-Domain (FDTD) method can be computationally intensive when large volumes must be discretised at fine spatial resolutions. This requirement exists because of the conditionally explicit nature of the FDTD algorithm, and the need to simulate fine geometrical details as commonly found in GPR antennas or in regions o... View full abstract»

• ### A Machine Learning Approach For Simulating Ground Penetrating Radar

Publication Year: 2018, Page(s):1 - 4
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The ability to produce, store and analyse large amounts of well-labeled data as well as recent advancements on supervised training, led machine learning to gain a renewed popularity. In the present paper, the applicability of machine learning to simulate ground penetrating radar (GPR) for high frequency applications is examined. A well-labelled and equally distributed training set is generated syn... View full abstract»

• ### Multiparameter Full-waveform inversion of on-ground GPR using Memoryless quasi-Newton (MLQN) method

Publication Year: 2018, Page(s):1 - 4
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Full waveform inversion (FWI) of ground penetrating radar (GPR) is a promising imaging tool for the detailed characterization of underground targets. In this study, on-ground GPR FWI is used to construct permittivity and conductivity variations of underground targets simultaneously. We applied memoryless quasi-Newton (MLQN) method to solve inverse problem of GPR. MLQN can attain acceptable results... View full abstract»

• ### Theory for 1D GPR data inversion for a dissipative layered medium

Publication Year: 2018, Page(s):1 - 4
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We present a data driven method of full waveform inversion in one dimension. This means that the inversion is carried out as a sequence of processing steps. The first step is known as Marchenko redatuming. In this step we retrieve focusing functions from the measured data. In the second step we isolate the last event in the focusing function to obtain the local reflection coefficient of a particul... View full abstract»

• ### Theory for 1D full waveform inversion of surface GPR data

Publication Year: 2018, Page(s):1 - 4
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In one dimension, full waveform inversion is shown to be a linear problem under several conditions. I show that if the magnetic permeability can be assumed constant and electric conductivity to be zero, measuring the magnetic field at the surface or in the air suffices as input data. I present the theory using integral equations that describe the electric field inside the medium in terms of contra... View full abstract»

• ### A numerical study on using guided GPR waves along metallic cylinders in boreholes for permittivity sounding

Publication Year: 2018, Page(s):1 - 4
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We performed a numerical study on using guided ground-penetrating radar (GPR) waves in boreholes for permittivity soundings using finite-difference (FDTD) simulations. The method presented here uses a GPR antenna that is placed next to a borehole in which a metal waveguide is lowered. Electromagnetic (EM) signals that the antenna sends out on the surface, couple to the waveguide and are reflected ... View full abstract»

• ### Real-time detection technology of synchronous grouting for shield tunnel and analysis of grouting effect

Publication Year: 2018, Page(s):1 - 6
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The tunnel synchronous grouting system is an important part of the shield machine. Shield tunnel synchronous grouting is an important measure to control stratum deformation and settlement of buildings. The traditional methods of grouting are by controlling grouting volume and grouting pressure, but the effect of grouting behind segments is difficult to control and the real-time monitoring of grout... View full abstract»

• ### Application of borehole radar for dam leakage detection

Publication Year: 2018, Page(s):1 - 4
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A borehole radar investigation was performed at Sanzuodian reservoir, Chifeng, China to assess the existence of the deep rock-filled dam leakage. The key methodology used includes both single-hole reflection profile and cross-hole radar tomography, which allowed identification of the hydraulic connections between the upstream side and the downstream side in deep foundation. The leakage path is cha... View full abstract»

• ### Mapping Complex Geology with GPR in a Canadian Potash Mine

Publication Year: 2018, Page(s):1 - 4
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The application of GPR in a Canadian salt and potash mine in New Brunswick, within a structurally complex geological setting, is discussed. When the mine was started in 2014, occurrences of anhydrite were unexpectedly encountered in mining development rooms. Furthermore, occasional undulations and folding in the potash ore seam complicated production mining because the potash ore would get diluted... View full abstract»

• ### A Case Study on Detection of Subsurface Cavities of Urban Roads Using Ground-coupled GPR

Publication Year: 2018, Page(s):1 - 4
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The city of Seoul has been in trouble due to road safety problems induced by a sudden and random road cave-ins. Extensive field investigations have been conducted to understand the phenomenon of the road cave-ins. This study introduced the results of field investigation on the development of road cave-ins and subsurface cavities. Ground penetrating radar (GPR) test results also reported to detect ... View full abstract»

• ### Application of Ground Penetrating Radar and Hilbert transformation helps revealing anomalous body of leakage in a concrete structure; A case history at Huai Mae Tor, Tak province, Thailand

Publication Year: 2018, Page(s):1 - 4
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Ground Penetrating Radar (GPR) measurement plays a key geophysical investigation to delineate rebar, thickness of concrete lining on a horse-shoe spillway, and condition of rock foundation of an earthen dam, Huai Mea Tor, Tak province, Thailand. By applying 2-D GPR, more than a hundred line at concrete floor of spillway, processing results particularly show rebar at depth 20 centimeter and thickne... View full abstract»

• ### A Review of Empirical Methods to Estimate Relative Permittivity

Publication Year: 2018, Page(s):1 - 6
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Four empirical models to estimate the relative permittivity of soil are tested based on a new database of relative permittivity measurements on soils. The selected models are Topp et. al. CRIM, SMDM, and GRMDM. The new database of relative permittivity measurements consists of 124 measurements on five different soils measured at a range of porosities and saturations. The effectiveness, positive at... View full abstract»

• ### Coal Subsurface Mapping for Selective Mining

Publication Year: 2018, Page(s):1 - 4
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There is a need for a reliable coal seam sensing system to provide selective mining capabilities for open-cut coal mining operations. This paper presents the preliminary results of a GPR-based sensing system developed for this purpose. The system will be used to scan open-cut sites to generate digital surfaces representative of the thickness of the coal seam. The digital surfaces will be uploaded ... View full abstract»

• ### High-Resolution Simulation of Point Bar Structures Associated with Paleochannel Evolution with GPR

Publication Year: 2018, Page(s):1 - 4
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The new wave of urban underground space development in the world, especially inside China, stimulates the need for precisely locating the position of paleo-channels due to their potential effects on stability of underground structures from the engineering point of view, and their potential cultural heritage values from the archaeology point of view. Paleo-channel structures are traditionally inves... View full abstract»

• ### A Real-time Method For Landmine Detection Using Vehicle Array GPR

Publication Year: 2018, Page(s):1 - 4
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Ground Penetrating Radar (GPR) is an effective method to identify subsurface target. Using vehicle array GPR can quickly detect landmine targets. At the same time, it means processing data will need more quickly and more accurately. Here, we present a real-time landmine detection method used on a 3-dimensional (3-D) dataset of vehicle array GPR. Firstly, the preprocessing is operated in each chann... View full abstract»

• ### Terrain Analysis in Eastern Ukraine and the Design of a Robotic Platform Carrying GPR Sensors for Landmine Detection

Publication Year: 2018, Page(s):1 - 4
Cited by:  Papers (1)
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We are designing and building a multi-sensor semi-autonomous vehicle to assist in humanitarian demining in the Donbass conflict zone, Ukraine. The vehicle will carry impulse GPR for fast target detection, and holographic GPR for discrimination of mines from clutter. The design includes the possibility to add additional sensor. To ensure that the vehicle is compatible with actual Donbass conditions... View full abstract»

• ### Investigation of ice jams using the GPR method

Publication Year: 2018, Page(s):1 - 4
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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... View full abstract»

• ### A Comparison of Solid and Loaded Bowtie Antennas in GPR for the Detection of Buried Landmines

Publication Year: 2018, Page(s):1 - 6
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This paper presents a comparison between solid and resisitively loaded bowtie antennas in GPR applications for the purpose of finding buried landmines. The resistively-loaded antennas were first evaluated over dry sand in a laboratory-based experiment with a landmine surrogate. Further testing, comparing the performance of the loaded antennas to that of solid bowtie antennas, was performed over re... View full abstract»

• ### Simulation of Ground Penetrating Radar for Anti-personnel Landmine Detection

Publication Year: 2018, Page(s):1 - 4
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Ground Penetrating Radar (GPR) is an important non-destructive tool to detect landmines. It radiates radar pulses to probe the ground that contains a variety of media, including landmine, sand, soil, clay, water, etc. and a large number of clutter items like burrows, cracks, discarded waste, branches and roots, metal wire, and so on. The subsurface is in such a complex and unidentified condition, ... View full abstract»

• ### Using GPR to Delineate the Porter's Pass Fault at the Acheron Rock Avalanche, New Zealand

Publication Year: 2018, Page(s):1 - 4
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The Porter's Pass Fault (PPF) is one of a number of en echelon range front faults along the coastal mountains to the east of, and parallel to, the Southern Alps and the Alpine Fault of the South Island of New Zealand. The PPF crosses the Acheron rock avalanche deposit in the Red Hill valley, just west of Lake Lyndon, near Porter's Pass. The relationship between the two is still unresolved, and gro... View full abstract»

• ### Dynamics of the folds of the McMurdo Ice Shelf, Scott Base, Antarctica

Publication Year: 2018, Page(s):1 - 6
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The McMurdo Ice Shelf flows obliquely onto the coastline northeast of Pram Point, Ross Island, Antarctica. Ground penetrating radar (GPR) imaging charted the detailed structure of the associated enigmatic pressure ridges and the deformation due to compressive forces. Two perpendicular GPR antenna orientations improved the positioning of subsurface features. Surface measurements of fold wavelengths... View full abstract»

• ### Estimation of anhydrite distribution with GPR and ERT in the northern part of the Morsleben salt structure

Publication Year: 2018, Page(s):1 - 4
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The Allertal salt structure, used as repository for nuclear waste, was explored from the surface by seismic measurements, ground openings and boreholes. Due to the accuracy of these investigations the internal salt structure is known. The complex geological structures (bent, folded, sometimes faulted layering of salt, potassium, clay, and anhydrite) in low-conductive salt can be mapped if distance... View full abstract»

• ### The study on the near surface structure in Yinken Steppe desert using GPR method

Publication Year: 2018, Page(s):1 - 4
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The desert study is helpful for understanding of regional land surface changes and paleoenvironment. The use of ground penetrating radar (GPR) for desert area exploration has its advantages, but the detection depth of former GPR is usually shallow. This paper we will use the GPR data gathered by the equipment of Key Laboratory of Electromagnetic Radiation and Sensing Technology (Chinese Academy of... View full abstract»

• ### Study of peatland internal structure by the Ground Penetrating Radar

Publication Year: 2018, Page(s):1 - 4
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According to background data, bog systems can be successfully surveyed using the ground penetrating radar (GPR). The high contrast resolution of peat due to its electrical characteristics accounts for this. This paper demonstrates the results of the GPR usage in the Republic of Karelia (Russia). Data collection was carried out by the OKO-2 radar with the 150M antenna unit (150 MHz frequency). Data... View full abstract»

• ### GPR Profile of Beacon Valley, Dry Valleys, Antarctica: Analysis of the GPR Response from Rocky Permafrost

Publication Year: 2018, Page(s):1 - 4
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Results of ground penetrating radar (GPR) profiling of Beacon Valley in Antarctica suggests that significant quantities of ice are present. A more detailed analysis of widespread diffractions highlights the large variations in the GPR velocity, both laterally and with depth. The dominant aspect of the data is the strong layering of the velocity, with high velocities (0.13 m/ns or greater) in the u... View full abstract»

• ### Investigating karst cave sediments of unroofed caves with GPR, XRF and XRD

Publication Year: 2018, Page(s):1 - 4
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Ground penetrating radar (GPR), a nondestructive geophysical method, was used to detect cave sediments, now exposed on the karst surface (in so-called “unroofed caves”) due to a general lowering of the surface (dissolution of carbonate rocks). It turned out that cave sediments are expressed as areas with strong signal attenuation on GPR radargrams. In order to test the GPR's capability and reliabi... View full abstract»

• ### GPR investigation of ice-filled cracks in loose deposits

Publication Year: 2018, Page(s):1 - 4
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The article presents the results of investigations to determine the identification features of cracks in loose sediments filled with ice, based on GPR survey data. The features are established on the basis of comparing the features of registered wave field with the data of drilling wells. The data of the GPR survey, the results of geological exploration at the placer deposits of the Arctic areas o... View full abstract»

• ### Characterization of Subsurface Structure in Different Landforms based on GPR Profiles along the Qinghai-Tibet Highway on Permafrost region

Publication Year: 2018, Page(s):1 - 4
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Ground-penetrating radar was applied at Beiluhe and Xieshuihe region along the Qlnghai-Tlbet Highway (QTH) to investigate the permafrost active layer thickness (ALT) and shallow subsurface internal structure. It has obviously differences for ALT and characteristic of shallow internal structure in different soil types and vegetation coverage. For the GPR data in different soil types and vegetation ... View full abstract»

• ### GPR study of sapropel deposits in Karelian shallow water areas

Publication Year: 2018, Page(s):1 - 4
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This paper presents data collected through ground penetrating radar (GPR) surveys of shallow waterbodies in the Republic of Karelia (Russian Federation). In addition to the analysis of radar profiles, we briefly describe the electrophysical parameters of the waterbodies surveyed. The effect of water mineralization and electrical conductivity on the dynamic characteristics of the GPR signal is also... View full abstract»

• ### Groundwater table level changes based on ground penetrating radar images: a case study

Publication Year: 2018, Page(s):1 - 4
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A ground penetrating radar has been used to estimate the depth of groundwater table. The GPR measurements were conducted on esker deposits along the same profile and repeated five times during the year in autumn, spring, two times in summer and again in autumn. A shielded transmitting antenna with a nominal frequency of 250 MHz was used during the surveys. The accuracy of ground penetrating radar ... View full abstract»

• ### Internal architecture of fluvial deposits and the morphology of the selected sections of Narew River valley in Warsaw area (central Poland) based on GPR investigations

Publication Year: 2018, Page(s):1 - 4
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Ground penetrating radar (GPR) investigations were conducted to characterise internal architecture of Narew River point bar and the riverbed morphology. The study area is situated in north of Warsaw (Central Poland), close to place where Narew River is flowing into Vistula River. 32 GPR profiles were taken on the most accessible point bar using 300 and 125 MHz antennas. Also 5 GPR profiles from wa... View full abstract»

• ### Quantifying scour depth in a straightened gravel-bed river with ground-penetrating radar

Publication Year: 2018, Page(s):1 - 4
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In straight gravel-bed river reaches, riverbank erosion can be induced by alternate bars and their associated scours. The maximum scour depth is therefore a key information to design reliable flood protections. However, scour depth cannot be correctly assessed by bathymetric riverbed surveys if scours are filled with sediments at low discharge. In this work, scour depths in a straightened, gravel-... View full abstract»

• ### Research on the Difference Detection Method Based on GPR Data

Publication Year: 2018, Page(s):1 - 4
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This paper presents a difference detection method for roadbed disease detection based on GPR, aiming to solve the problems of the low data processing efficiency and detection accuracy. This method is used for difference processing between the radar data acquired at different time. Comparing with many existing data processing method of one - time detection, this novel method can achieve high resolu... View full abstract»

• ### Combining ground penetrating radar and electrical resistivity tomography for the study of history of relief development in Dnieper River valley

Publication Year: 2018, Page(s):1 - 4
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Application of geophysical methods in geomorphological studies is aimed at the reconnaissance of drill core locations and interpolation between cores: tracing of lithological and stratigraphic boundaries, as well as the determination of bedding type within individual strata (horizontal, crossing, etc.) which is important for interpretation of their genesis. Our study was conducted in the upper Dni... View full abstract»

• ### Combined GPR and surface magnetic resonance investigation for aquifer characterisation

Publication Year: 2018, Page(s):1 - 4
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Ground-penetrating radar (GPR) and magnetic resonance tomography (MRT) are used for aquifer architecture mapping and characterisation. We combine both techniques on a hydrogeophysical test site with glacigenic and periglacial deposits that show distinct lateral variability. A pseudo 3D GPR investigation provides the architecture on a large area and, e.g., the topography of a till layer, which acts... View full abstract»

• ### Estimation of Petrophysical Parameters of Granular Materials, Applying an Amplitud Inversion From GPR Data: Case Study Irapuato, GTO., Mexico

Publication Year: 2018, Page(s):1 - 6
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For the development of this work an unconventional technique to estimate the spatial distribution of petrophysical parameters was applied. The inversion of the amplitude is applied to the GPR data for estimating reflectivity, the used algorithm requires preconditioning of the data by conventional processing techniques. The proposed inversion algorithm, operating with band matrices, had shown to be... View full abstract»

• ### Displacement Frequency Characteristics of Direct Transmission of GPR Signals in Borehole Measurements

Publication Year: 2018, Page(s):1 - 4
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We present results of electromagnetic logging in a borehole with a 50 MHz dipole antenna. The GPR survey was carried out in flooded vertical borehole to a depth of 40 meters through differing geological strata. We measured characteristics of the amplitude-frequency spectrum of the probing signal, which varied depending on contact media in the borehole. In particular, we considered two parameters o... View full abstract»

• ### Extending surface geology data through GPR prospections: Quaternary faulting signature from the Campotenese area (Calabria-Italy)

Publication Year: 2018, Page(s):1 - 4
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A series of Ground-Penetration Radar (GPR) profiles were collected on a site located in the Campotenese basin, in the active belt of the Calabro-Lucanian boundary (southern Apennines - Italy). This methodology was applied to visualize the effect of recent deformations possibly related to past ground ruptures due to historical or pre-historical earthquakes. Several 300 MHz and 500 MHz profiles perp... View full abstract»