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Advanced Ground Penetrating Radar, 2007 4th International Workshop on

Date 27-29 June 2007

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Displaying Results 1 - 25 of 64
  • [Front cover]

    Publication Year: 2007, Page(s): 1
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  • [Title page and frontmatter]

    Publication Year: 2007, Page(s):1 - 3
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  • [Opinion]

    Publication Year: 2007, Page(s): v
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  • Reviewer and referee listings

    Publication Year: 2007, Page(s):1 - 4
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  • Table of contents

    Publication Year: 2007, Page(s):1 - 4
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  • Development of the Hand held dual sensor ALIS and its evaluation

    Publication Year: 2007, Page(s):3 - 7
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5205 KB) | HTML iconHTML

    GPR has been thought a useful sensor for detection of buried land mines, but no GPR has been practically deployed in humanitarian demining. Since 2002, we have developed a new hand-held land mine detection dual-sensor ALIS. ALIS is equipped with a metal detector and a GPR, and it has a sensor tracking system, which can record the GPR and Metal detector signal with its location. It makes possible t... View full abstract»

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  • General representations of electromagnetic interferometry

    Publication Year: 2007, Page(s):8 - 11
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2898 KB) | HTML iconHTML

    The theoretical and experimental developments in interferometry have advanced spectacularly over the last five years and are still expanding at a rapid pace. With interferometry we mean the retrieval of the Green's function by cross-correlating or cross-convolving two (wave) field recordings. Over the last year several contributions have included interferometric representations for media with loss... View full abstract»

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  • Array-Based GPR for Shallow Subsurface Imaging

    Publication Year: 2007, Page(s):12 - 15
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4490 KB) | HTML iconHTML

    Recently we have reported development of an UWB array-based time-domain Ground Penetrating Radar for landmine detection. The radar is designed to be used within a vehicle-mounted multi-sensor system for humanitarian demining and produces 3D images of subsurface by ID mechanical scanning. In this paper, we demonstrate imaging capabilities of the developed system. The imaging capability of the radar... View full abstract»

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  • Directional Borehole Radar Calibration

    Publication Year: 2007, Page(s):19 - 23
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2165 KB) | HTML iconHTML

    We are developing an innovative low noise borehole radar system that is designed for a single borehole providing 3D imaging capabilities. Harsh and changing operating environments are challenges to the electronic design. Low noise systems are particularly sensitive to operating conditions. After a brief introduction, testing and calibration methods are introduced. Included are new measurement resu... View full abstract»

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  • Analysis of Dipole Antenna Eccentered in a Borehole for Borehole Radar

    Publication Year: 2007, Page(s):24 - 27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2330 KB) | HTML iconHTML

    In this paper, we analyze response of borehole radar that use an electrically small dipole antenna in an eccentric borehole. Our approach is an extended version of the pseudoanalytic formulation, which was previously applied for analysis of an induction logging tool. In order to verify the calculation method, we did two experiments. The first one is measurement of monopole antenna response inside ... View full abstract»

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  • Principle of a direction sensitive borehole antenna with advanced technology and data examples

    Publication Year: 2007, Page(s):28 - 31
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4204 KB) | HTML iconHTML

    Underground, in mines it is important to get spatial information about the geology on limited profiles. In low conductive material, like salt, ground penetrating radar (GPR) is a valuable method to find structures in the environment. For radar measurements in boreholes a direction sensitive antenna can solve the problem of getting spatial information. A new development of a direction sensitive ant... View full abstract»

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  • Analysis of Directional Borehole Radar Measurement Data

    Publication Year: 2007, Page(s):32 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4232 KB) | HTML iconHTML

    We developed a new directional borehole radar system with an array of optical electric field sensors as receivers. The system was tested in a field test site in order to assert its ability to detect three dimensional (3D) location of a subsurface tunnel. In this paper, the result is shown with a comparison to a result obtained by RAMAC directional borehole radar system. It is found that the optica... View full abstract»

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  • Influence of Mode Conversion at Borehole on Direction Finding with Dipole Array Antenna

    Publication Year: 2007, Page(s):36 - 41
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6240 KB) | HTML iconHTML

    We investigate influence on DOA estimation with the circular dipole array antenna in a borehole (CAB), when the TE plane wave incident on the CAB. According to calculation of electromagnetic fields of the TE plane wave, vertical component of the electric field is excited by the cylindrical layers around the antenna, and these phenomena are called mode conversion in this paper. This increases error... View full abstract»

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  • Using GPR to Monitor Cracks in a Historical Building

    Publication Year: 2007, Page(s):45 - 48
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4526 KB) | HTML iconHTML

    The paper treats the application of GPR to detect and monitor cracks induced on a historical building by a landslide. The data were acquired on a floor inside the building with profiles 10 cm apart recorded at three different times. A 2GHz bipolar antenna was used, which allows the acquisition of multi-component data. The data were processed to produce vertical profiles and a 3D cube for each comp... View full abstract»

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  • Inversion of dispersive APVO GPR curves: a thin-layer approach for fracture characterization on a vertical cliff

    Publication Year: 2007, Page(s):49 - 53
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5132 KB) | HTML iconHTML

    Reliability of stability assessment of prone to fall rock masses suffers from the lack of information about the geometry and the properties of the fracture networks. GPR profiles associated to Common Mid-Point (CMP) data, all recorded on the cliff wall, recently proved their efficiency to image correctly the extension of fractures with a satisfying resolution. However, besides velocity, CMP data a... View full abstract»

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  • Ground penetrating radar imaging of a 4th Century Roman Fort, Humayma, Jordan

    Publication Year: 2007, Page(s):54 - 59
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4268 KB) | HTML iconHTML

    A suite of geophysical surveys were conducted on and around the site of a 4th Century Roman fort in Southern Jordan from 2002-2005 as part of the Humayma Excavation Project. Presented here are the results of the ground penetrating radar (GPR) data. Data were collected in a series of 1-m-spaced profiles within the 150m by 200m Fort and collated to generate 3D volumes. These GPR data volumes are sli... View full abstract»

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  • Multi-frequency ground-penetrating radar method for revealing complex sedimentary facies

    Publication Year: 2007, Page(s):60 - 63
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4060 KB) | HTML iconHTML

    We attempted to resolve deltaic facies in Taylor Valley, Antarctica by using pulses centered near 120, 300 and 880 MHz, the latter of which has not yet been tried in this setting. The 120 MHz profiles clearly defined gross material changes, while the 300 MHz profiles added significant resolution to the topset, foreset and bottomset beds. The additional, higher frequency provided only about 2.5 m p... View full abstract»

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  • Applications of GPR to archaeology and geology: the example of the regio III in Pompeii (Naples, Italy)

    Publication Year: 2007, Page(s):64 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2376 KB) | HTML iconHTML

    GPR investigations has been collected in Pompeii, in an area of the regio III not yet fully excavated. In this area, as in many other parts of this roman city, large portions of archaeological features are still buried under thick volcanic deposits. The radar survey has been conducted on the top of a long scarp parallel to Nola Street. This site was chosen because some remains are well visible on ... View full abstract»

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  • Low Frequency GPR in Difficult Terrain

    Publication Year: 2007, Page(s):68 - 73
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6738 KB) | HTML iconHTML

    Many subsurface investigations are requested in areas unsuitable for most geophysical methods. In some instances, difficult terrain prevents surface coupling with transmitters, receivers, or other instrumental components. In other instances, such as in urban areas, spatial restrictions prohibit the use of seismic methods. Ground penetrating radar (GPR) is one method that can be used to attempt dat... View full abstract»

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  • Masonry investigation through Very Large Bandwidth CW-SF radar

    Publication Year: 2007, Page(s):74 - 77
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4022 KB) | HTML iconHTML

    In this paper, a number of experimental tests aimed to evaluate the potential of Very Large Bandwidth Continuous Wave Step Frequency (CW-SF) radar for investigating masonry structures, are reported. Furthermore, an innovative polarimetric technique able to detect the double-bounce signal due to corner inside a masonry is proposed and tested. View full abstract»

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  • Geophysical investigations in the Castle of Crotone (Calabria Region, Italy)

    Publication Year: 2007, Page(s):78 - 81
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4276 KB) | HTML iconHTML

    This work is about geophysical investigations carried out in the Carlo V king's castle, in Crotone village (Calabria Region, Italy). A magnetic method (M), ground penetrating radar (GPR) and electrical resistivity tomography (ERT) surveys have been used to locate buried remains and old walkway. Each interesting area was investigated with a map survey, which is obtained acquired along several paral... View full abstract»

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  • Incorporating near-surface layering in GPR data inversion for improved surface water content estimates

    Publication Year: 2007, Page(s):85 - 90
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3331 KB) | HTML iconHTML

    We analyze the retrieval of soil surface dielectric permittivity in presence of shallow dielectric contrasts using full-wave inversion of off-ground monostatic ground-penetrating radar (GPR) data. Shallow soil layers affect the surface reflection and lead to constructive or destructive interferences which result, respectively, in overestimated and underestimated surface dielectric permittivity val... View full abstract»

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  • Evaluating GroundPenetrating Radar use for water infiltration monitoring

    Publication Year: 2007, Page(s):91 - 95
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5154 KB) | HTML iconHTML

    Ground-Penetrating Radar (GPR) was used to monitor water infiltration in sand. Water was injected down an 81 cm long tubed hole with a piezometer recording the depth of water and a tap valve used to adjust it to 15 cm ¿¿ 2 cm above the bottom of the tube. During the 20 minutes of infiltration two GPR antennas (transmitter and receiver) were recording a trace every second from an offset position on... View full abstract»

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  • Determination of soil permittivity from GPR data and a microwave tomography approach: a preliminary study

    Publication Year: 2007, Page(s):96 - 100
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2735 KB) | HTML iconHTML

    In this paper we present a new strategy to retrieve the dielectric permittivity of the soil starting from B-Scan GPR data, gathered on a pipe buried on purpose and processed by means of a microwave tomography algorithm. The validation will be performed by making use of synthetic data, obtained from an FDTD code. The results of the proposed approach shall be compared with those achieved from the hy... View full abstract»

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  • Constraining GPR data inversion using hydrodynamic laws for noninvasive soil hydraulic and electric property determination

    Publication Year: 2007, Page(s):101 - 105
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2525 KB) | HTML iconHTML

    We constrain full-wave inversion of time-lapse radar data using hydrodynamic modeling to simultaneously identify the shallow subsurface hydraulic properties and continuous vertical electric profiles. Radar data are acquired in the frequency domain using a vector network analyzer combined with an off-ground monostatic antenna. This permits to accurately filter antenna effects and to derive Green fu... View full abstract»

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