2007 4th International Workshop on, Advanced Ground Penetrating Radar最新文献_第5页

MARSIS Data Inversion Approach MARSIS数据反演方法

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386563

G. Picardi, D. Biccari, M. Cartacci, A. Cicchetti, S. Giuppi, A. Marini, A. Masdea, R. Noschese, F. Piccari, R. Seu, O. Bombaci, D. Calabrese, E. Zampolini, E. Pettinelli, C. Federico, A. Frigeri, P. T. Melacci, R. Orosei, L. Marinangeli, E. Flamini

{"title":"MARSIS Data Inversion Approach","authors":"G. Picardi, D. Biccari, M. Cartacci, A. Cicchetti, S. Giuppi, A. Marini, A. Masdea, R. Noschese, F. Piccari, R. Seu, O. Bombaci, D. Calabrese, E. Zampolini, E. Pettinelli, C. Federico, A. Frigeri, P. T. Melacci, R. Orosei, L. Marinangeli, E. Flamini","doi":"10.1109/AGPR.2007.386563","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386563","url":null,"abstract":"In this paper we describe an inversion approach in order to analyze data from the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) instrument on Mars Express. The inversion process allows the dielectric constant of the subsurface material to be estimated provided the dielectric constant of the surface is known. In addition, if impurity are present, it is possible to estimate the dielectric constant of any inclusions as well as the percentage amount of material in the inclusions relative to the host material provided knowledge of the host material up to the depth where the interface has been detected is available. The data inversion method is based on the analysis of the surface to subsurface power ratio and the relative time delay as measured by MARSIS. The data inversion has been performed at several frequencies in order to estimate the frequency dependent parameters affecting the behavior of the radar echoes. It is necessary that the surface and subsurface interfaces have the same roughness in order to estimate the Subsurface Fresnel reflectivity. As a preliminary approach, only flat surface have been selected. MOLA (Mars Orbiter Laser Altimeter) has already provided detailed data on the visible Martian surface and a simulator, with a facet model, has been utilized to use MOLA data in order to verify the correct selection of the frames that will be used for the data inversion (absence of clutter echoes).","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"106 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":"129029481","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

Using GPR to Monitor Cracks in a Historical Building 利用探地雷达监测历史建筑裂缝

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386522

L. Orlando

引用次数: 12

Array-Based GPR for Shallow Subsurface Imaging 基于阵列的探地雷达浅层地下成像

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386516

A. Yarovoy, T. Savelyev, P. Aubry, L. Ligthart

引用次数: 7

GPR signal attenuation vs. depth on damaged flexible road pavements 受损柔性路面上探地雷达信号衰减随深度的变化

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386571

D. Ranalli, M. Scozzafava, M. Tallini, S. Colagrande

{"title":"GPR signal attenuation vs. depth on damaged flexible road pavements","authors":"D. Ranalli, M. Scozzafava, M. Tallini, S. Colagrande","doi":"10.1109/AGPR.2007.386571","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386571","url":null,"abstract":"The findings of a GPR survey carried out on damaged flexible road pavements built on embankments and in cutting sections were reported. The survey was carried out to recognize correlations between: (i) types of damage, (ii) height of embankments or depth of cutting sections, (iii) traffic load and (iv) GPR scan results. Two types of damages, inducing loss of load bearing capacity, were investigated: transversal cracks and ramified cracks. Sixteen sites were chosen, describing the different combinations of the variables to be analyzed. The sites were selected among secondary non-urban roads in the area of L'Aquila (central Italy). Road integrity was evaluated by a GPR quantitative analysis (GPR signal attenuation vs. depth), using an antenna array with a nominal frequency of 1600 MHz. It investigates media till a depth of 1.5 m which is also the maximum depth of influence of the induced traffic stress. The results carried out from two sets of scans (affected and unaffected parts) were compared in order to identify GPR signal changes. These changes made it possible to trace the causes of the damage to the road pavement vs. embankment height, cutting depth and traffic load.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"142 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":"128121782","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: 9

A prototype for the WISDOM GPR on the ExoMars mission ExoMars任务中WISDOM探地雷达的原型

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386562

S. Hamran, T. Berger, L. Hanssen, M. Oyan, V. Ciarletti, C. Corbel, D. Plettemeier

引用次数: 19

Frequency-Dependent Attenuation and Velocity Characteristics of Magnetically Lossy Materials 磁性损耗材料的频率衰减和速度特性

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386541

N. Cassidy

{"title":"Frequency-Dependent Attenuation and Velocity Characteristics of Magnetically Lossy Materials","authors":"N. Cassidy","doi":"10.1109/AGPR.2007.386541","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386541","url":null,"abstract":"In many situations, the magnetic properties of sub-surface materials are often considered unimportant when compared to their 'dielectric' characteristics (i.e., permittivity and conductivity). However, if significant amounts of magnetic minerals exist, such as magnetite, hematite, maghemite and/or iron in its free state, then the relaxation phenomena of these magnetically lossy particles can have an overriding effect on the complex effective permittivity spectrum of the material. In this paper, the effective permittivity, attenuation and propagation characteristics of a range of nano-to-micro scale quartz/magnetite mixtures are investigated with the aim of determining how lossy magnetic minerals affect the macroscopic properties of the material as a whole. In addition, the measured results are compared to popular 'dielectric-based' mixing models (such as the Complex Refractive Index Model CRIM) and the nature of the magnetic relaxation mechanisms is discussed from the aspect of composite mediums. Results indicate that even relatively small amounts of magnetite can have a considerable effect on both signal attenuation and wave propagation velocity and that the current range of mixing models are inadequate for the description of magnetically lossy mixtures.","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":"133022272","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 Directional Borehole Radar Measurement Data 定向钻孔雷达测量数据分析

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386520

T. Takayama, M. Sato, J. H. Kim

引用次数: 1

Analysis of a non Electrical Resistive GPR Antenna 非电阻式探地雷达天线的分析

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386552

G. Garcia, G. Casassa, D. Ulloa, R. Zamora

引用次数: 1

Experimental Verification of LOZA-V GPR Penetration Depth and Signal Quality LOZA-V探地雷达探深与信号质量的实验验证

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386558

V. Kopeikin, I. Krasheninnikov, P. Morozov, A. Popov, F. Guangyou, L. Xiaojun, Z. Bin

引用次数: 8

Constraining GPR data inversion using hydrodynamic laws for noninvasive soil hydraulic and electric property determination 基于水动力规律的约束探地雷达数据反演无创土壤水电特性测定

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386533

S. Lambot, S. Guillaso, H. Vereecken, E. Slob

{"title":"Constraining GPR data inversion using hydrodynamic laws for noninvasive soil hydraulic and electric property determination","authors":"S. Lambot, S. Guillaso, H. Vereecken, E. Slob","doi":"10.1109/AGPR.2007.386533","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386533","url":null,"abstract":"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 functions from which the inversion is initiated. In order to demonstrate that enough information is contained in the radar data so as to ensure unique estimates, hydrodynamic events were simulated for three different textured soils, namely, coarse, medium, and fine. The corresponding time-lapse radar data were subsequently computed and inverted to find back key soil hydraulic parameters, i.e., ¿, n, and Ks in Mualem-van Genuchten's model. For the three scenarios considered, the three hydraulic parameters were exactly retrieved, and hence, the corresponding time-dependent electric profiles as well. Provided that the soil-specific relations between the soil water content and its electric properties and the hydrodynamic initial and boundary conditions are known, the proposed method appears to be promising for proximal mapping of the shallow subsurface hydraulic properties and monitoring of the water dynamics at the field scale.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"12 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":"128177424","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