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2007 4th International Workshop on, Advanced Ground Penetrating Radar最新文献

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Prediction of structural damages of road pavement using GPR 利用探地雷达技术预测道路路面结构损伤
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386569
A. Benedetto
{"title":"Prediction of structural damages of road pavement using GPR","authors":"A. Benedetto","doi":"10.1109/AGPR.2007.386569","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386569","url":null,"abstract":"A new methodology has been proposed to extract the hydraulic permittivity fields in sub-asphalt structural layers and soils from the moisture maps observed with GPR. It is effective at diagnosing the presence of clay or cohesive soil that compromises the bearing capacity of sub-base and induces damage on the road. The numerical algorithm has been yet discussed in the 11th International Conference on Ground Penetrating Radar [5]. Here some experimental confirms have been presented.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"763 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123281294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Subsurface localization of interfaces 界面的地下定位
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386545
A. Brancaccio, R. Pierri, F. Soldovieri, G. Leone
{"title":"Subsurface localization of interfaces","authors":"A. Brancaccio, R. Pierri, F. Soldovieri, G. Leone","doi":"10.1109/AGPR.2007.386545","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386545","url":null,"abstract":"The localization of a slab embedded within a homogeneous half-space is dealt with. A multi-frequency plane wave incidence is assumed and the locations of the slab interfaces are represented as the support of \"distributions\". A linear model of the electromagnetic scattering is adopted and the inversion is regularized by means of the Singular Value Decomposition (SVD) tool. Numerical tests performed via SVD allow to analyze the reconstruction capabilities of the reconstruction algorithm, i.e. the maximum depth of investigation and the resolution limits, which depend on the properties of the investigated medium and on the exploited work frequency band. Experimental results are shown.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114068199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of a GPR for deep investigations 探地雷达深度探测系统的设计
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386556
V. Utsi
{"title":"Design of a GPR for deep investigations","authors":"V. Utsi","doi":"10.1109/AGPR.2007.386556","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386556","url":null,"abstract":"This paper describes the design steps in producing a GPR for deep, mainly geological and environmental investigations. A phase coded spread spectrum pulse is used with high power transmitters to an antenna array. The receiver has a real time data converter with a correlator giving 125dB dynamic range. Initial results are shown.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"463 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121062899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Analysis of Dipole Antenna Eccentered in a Borehole for Borehole Radar 钻孔雷达偶极子天线偏心分析
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386518
S. Ebihara, Y. Inoue
{"title":"Analysis of Dipole Antenna Eccentered in a Borehole for Borehole Radar","authors":"S. Ebihara, Y. Inoue","doi":"10.1109/AGPR.2007.386518","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386518","url":null,"abstract":"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 an eccentric air cylindrical layer in another water cylindrical layer on a ground plane, when a wave is incident on the antenna. The second experiment is crosshole measurement in a field test site. We controlled position of a dipole antenna in a borehole, and made it eccentered in a water-filled borehole. In both experiments, we compared the calculated data and the experimental one, and we will show the validity of the developed pseudoanalytic formulation.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122569953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Estimation of Electromagnetic of Libyan soil Properties by Stepped Frequency Radar 用步进频率雷达估计利比亚土壤的电磁特性
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386535
S. Elkhetali, K. A. Salem
{"title":"Estimation of Electromagnetic of Libyan soil Properties by Stepped Frequency Radar","authors":"S. Elkhetali, K. A. Salem","doi":"10.1109/AGPR.2007.386535","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386535","url":null,"abstract":"A vector network analyzer was used to measure the electromagnetic properties of two types of Libyan soil. The vector network analyzer was used to act as a stepped frequency ground probing radar. The frequency that was covered is from 1 to 3 GHz. A TEM horn antenna was used for transmission and reception. From the experiments the attenuation and time delay was measured. Then conductivity, permittivity and moisture content were estimated from the measurements. The samples were taken before and after it rained by a week following a long dry season. The experiments gave a reasonable estimation of the parameters and showed that clay retained its moisture for a longer period that sandy soil.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132812208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Applications of GPR to archaeology and geology: the example of the regio III in Pompeii (Naples, Italy) 探地雷达在考古学和地质学中的应用:以庞贝(意大利那不勒斯)地区III为例
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386526
P. Barone, T. Bellomo, E. Pettinelli, C. Scarpati
{"title":"Applications of GPR to archaeology and geology: the example of the regio III in Pompeii (Naples, Italy)","authors":"P. Barone, T. Bellomo, E. Pettinelli, C. Scarpati","doi":"10.1109/AGPR.2007.386526","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386526","url":null,"abstract":"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 the front of the scarp, so they can be use to calibrate the radar sections. The results allowed us to reconstruct the subsurface structure of the area, and to locate the main roman ruins buried in the volcanic deposits. Moreover, the analyses of the radar sections highlighted the geometry of the volcanic deposits overlain the roman ruins, and made possible the correlation between the shallow geological stratigraphy and the reflectors sequence shown in the radargrams.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124229914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
An Investigation into the Implementation of ADI-FDTD Subgrids in FDTD GPR Modeling 时域有限差分雷达建模中ADI-FDTD子网格的实现研究
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386537
N. Diamanti, A. Giannopoulos
{"title":"An Investigation into the Implementation of ADI-FDTD Subgrids in FDTD GPR Modeling","authors":"N. Diamanti, A. Giannopoulos","doi":"10.1109/AGPR.2007.386537","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386537","url":null,"abstract":"The implementation of subgrids in the traditional finite-difference time-domain (FDTD) method is often required, especially when structures of fine geometry need to be modeled. Since the FDTD method is conditionally stable, different time-steps should be employed in the main grid and in the subgrid. To overcome the requirement for time interpolation at the boundary between the two grids, an unconditionally stable method, the alternating-direction-implicit (ADI-FDTD) method, has been used in the subgrid. As a result both the main FDTD grid and the subgrid use the same time-step. This paper presents an investigation into the performance of an ADI-FDTD subgrid when it is implemented into the conventional FDTD method.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125298982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Calibration report of the SHARAD instrument SHARAD仪器的校准报告
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386560
R. Croci, F. Fois, E. Flamini, R. Mecozzi, R. Seu
{"title":"Calibration report of the SHARAD instrument","authors":"R. Croci, F. Fois, E. Flamini, R. Mecozzi, R. Seu","doi":"10.1109/AGPR.2007.386560","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386560","url":null,"abstract":"The Mars Shallow Radar Sounder (SHARAD) is an HF (20 MHz) Sounding Radar embarked onboard the Mars Reconnaissance Orbiter (MRO) spacecraft. SHARAD on-ground calibration activities have been limited to the characterization of the SEB (SHARAD Electronic Box), not having been possible to perform extensive characterization of the flight antenna nor end-to-end calibrations on ground. Scope of the present document is to define the activities to be carried out in-flight in order to ensure SHARAD products calibration. The calibration needs are assessed and an overall calibration strategy is then defined, leading to the identification of the data sets to be collected and relevant processing to be applied. The document also address how to exploit the available calibration data (from both on-ground and in-flight calibration) to correct SHARAD products, and the organization of the calibration database.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133335985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
FirstArrival Traveltimes Inversion Based on Minimal Number of Parameters in shallow crosswell GPR Tomography 浅井间探地雷达层析成像中基于最小参数数的首个星对手旅行时反演
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386539
M. Mangue, H. Perroud, D. Rousset
{"title":"FirstArrival Traveltimes Inversion Based on Minimal Number of Parameters in shallow crosswell GPR Tomography","authors":"M. Mangue, H. Perroud, D. Rousset","doi":"10.1109/AGPR.2007.386539","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386539","url":null,"abstract":"Ground-penetrating radar is often used for the characterization of subsurface properties. In this paper, we present a cross-well tomographic inversion algorithm of first-arrival traveltimes which uses only a limited number of parameters. This methodology has been developed for media with significant contrast of electrical permittivity, for example for near-surface sedimentary media. The aim is to determine the distribution of the electromagnetic wave velocity between two wells. We consider that the media can be decomposed into several homogeneous layers, with horizontal or gently dipping interfaces. It is described by a vector of parameters which includes one velocity and one or two thicknesses per layer. This methodology allows to obtain a 1D velocity profile of the medium between the two wells. This inversion scheme was tested on synthetic data. The head waves which appear due to the velocity contrasts are taken account in the inversion. Our inversion methodology was also tested on real data and the obtained velocity models were compared to those obtained using surface acquisition data only. Our results show that the velocity profiles issued from cross-well and surface acquisition appear to be very similar.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121740542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and construction of a large test site to characterize the GPR response in the vadose zone 设计和建造一个大型试验场，以表征渗透区的探地雷达响应
2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386534
B. di Pasquo, E. Pettinelli, G. Vannaroni, A. di Matteo, E. Mattei, A. De Santis, P. Annan, D. Redman
{"title":"Design and construction of a large test site to characterize the GPR response in the vadose zone","authors":"B. di Pasquo, E. Pettinelli, G. Vannaroni, A. di Matteo, E. Mattei, A. De Santis, P. Annan, D. Redman","doi":"10.1109/AGPR.2007.386534","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386534","url":null,"abstract":"In this work Ground Penetrating Radar (GPR) and Time Domain Reflectometry (TDR) measurements are carried out on a test-site. The test site consists of a pit filled with gravel and sand in which a pipe system for water inflow is buried. The data are collected under different water charge conditions and the water level is monitored by piezometers. TDR measurements are performed at various depths using a multilevel probe system. GPR measurements are performed by using the single-offset reflection method with a system equipped with 250 MHz and 500 MHz antennas. The results pertaining to the water table depth estimations, obtained by calibrating time GPR section with TDR velocity data, have shown a good agreement with the piezometric responses.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123723491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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