2007 4th International Workshop on, Advanced Ground Penetrating Radar最新文献_第3页

Improved Bow-Tie Antenna for Pulse Radiation and Its Implementation in a GPR Survey 脉冲辐射改进弓形结天线及其在探地雷达探测中的实现

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386551

A. A. Lestari, D. Yulian, Liarto, A. B. Suksmono, E. Bharata, A. Yarovoy, L. Ligthart

引用次数: 19

Vertical and Horizontal Resolution of GPR bow-tie antennas 探地雷达领结天线的垂直和水平分辨率

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386549

F. Rial, Manuel Pereira, H. Lorenzo, Pedro Arias, A. Novo

引用次数: 18

Solving the full nonlinear inverse problem for GPR using a three step method 用三步法求解探地雷达全非线性逆问题

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386542

L. V. van Kempen, N. T. Thành, H. Sahli, D. Hào

{"title":"Solving the full nonlinear inverse problem for GPR using a three step method","authors":"L. V. van Kempen, N. T. Thành, H. Sahli, D. Hào","doi":"10.1109/AGPR.2007.386542","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386542","url":null,"abstract":"In order to extract accurate quantitative information out of Ground Penetrating Radar (GPR) measurement data, one needs to solve a nonlinear inverse problem. In this paper we formulate such problem as a nonlinear least squares problem which is non convex. Solving a non-convex optimization problem requires a good initial estimation of the optimal solution. Therefore we use a three step method to solve the above non-convex problem. In a first step the qualitative solution of the linearized problem is estimated to obtain the detection and support of the subsurface scatterers. For this first step Synthetic Aperture Radar (SAR) is proposed. The second step consists out of a qualitative solution of the linearized problem to obtain a first guess for the material parameter values of the detected objects. The method proposed for this is Algebraic Reconstruction Technique (ART), which is an iterative method, starting from the initial value, given by the first step, and improving on this until an optimum is achieved. The final step then consists out of the solution of the nonlinear inverse problem using a variational method.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"265 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":"124316061","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

Multi-frequency ground-penetrating radar method for revealing complex sedimentary facies 复杂沉积相的多频探地雷达揭示方法

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386525

A. Delaney, J. Horsman, M. Prentice, S. Arcone

引用次数: 0

Incorporating near-surface layering in GPR data inversion for improved surface water content estimates 在探地雷达数据反演中结合近地表分层以改进地表水含量估算

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386530

K. Kooper, S. Lambot, E. Slob

{"title":"Incorporating near-surface layering in GPR data inversion for improved surface water content estimates","authors":"K. Kooper, S. Lambot, E. Slob","doi":"10.1109/AGPR.2007.386530","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386530","url":null,"abstract":"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 values. Synthetic GPR Green's functions were generated for a series of model configurations with different contrasts and different layer thicknesses. Green's function inversions were then performed to retrieve the initial parameters and analyze the sensitivity of the different parameters in the inverse problem. Two global optimization algorithms were used and compared, namely, a genetic algorithm and the multilevel coordinate search. The results showed that, depending on the contrast and layer thickness, it is not always possible to identify the original soil model. This depends in particular on the width of the frequency range. Both algorithms led to comparable results and did not converge properly in all cases, given their standard parameterization. Yet, the proposed method appears to be promising to improve real-time mapping of surface water content using off-ground GPR and full-wave inversion.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"93 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":"134351603","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

Electromagnetic scattering by buried cylinders 埋地圆柱的电磁散射

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386543

M. di Vico, P. Martinelli, L. Pajewski, G. Schettini, F. Frezza

引用次数: 6

The broadband device for nondestructive measurements of dielectric permeability of lossy media 用于无损测量损耗介质介电渗透率的宽带装置

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386555

N. Chubinsky, V. Filonenko

引用次数: 1

Sounding Mars with SHARAD & MARSIS 用SHARAD和MARSIS探测火星

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386561

E. Flamini, F. Fois, D. Calabrese, O. Bombaci, C. Catallo, A. Croce, R. Croci, M. Guelfi, E. Zampolini, G. Picardi, R. Seu, R. Mecozzi, D. Biccari, M. Cartacci, A. Cicchetti, A. Masdea, G. Alberti, S. Maffei, C. Papa

{"title":"Sounding Mars with SHARAD & MARSIS","authors":"E. Flamini, F. Fois, D. Calabrese, O. Bombaci, C. Catallo, A. Croce, R. Croci, M. Guelfi, E. Zampolini, G. Picardi, R. Seu, R. Mecozzi, D. Biccari, M. Cartacci, A. Cicchetti, A. Masdea, G. Alberti, S. Maffei, C. Papa","doi":"10.1109/AGPR.2007.386561","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386561","url":null,"abstract":"MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) is a low frequency nadir looking sounding radar selected by ESA as a payload of the Mars Express mission, whose primary Scientific Objective is to map the distribution of water both solid and liquid, at global scale on the Martin crust. MARSIS is the first instrument to be able to detect what lies beneath the surface of Mars (up to about 5Km). The Mars Shallow Radar Sounder (SHARAD), a facility instrument provided by the Italian Space Agency (ASI), is embarked on board the NASA Mars Reconnaissance Orbiter spacecraft. SHARAD began science operations on October 3rd 2006: it has been collected data from surface and subsurface. This instrument penetrates to roughly half a kilometre below Mars' to search for information about underground layers of ice, rock and, perhaps, melted water. In this paper, some interesting comparisons between these sounders are proposed. Data confirm that MARSIS and SHARAD are complementary instruments.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"253 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":"132881281","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

Time-frequency domain signature analysis of GPR data for landmine identification 地雷识别探地雷达数据时频域特征分析

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386544

O. Lopera, N. Milisavljevie, D. Daniels, B. Macq

引用次数: 26

SHARAD radar signal processing technique SHARAD雷达信号处理技术

2007 4th International Workshop on, Advanced Ground Penetrating Radar Pub Date : 2007-06-27 DOI: 10.1109/AGPR.2007.386564

G. Alberti, S. Dinardo, S. Mattei, C. Papa, M. Santovito

{"title":"SHARAD radar signal processing technique","authors":"G. Alberti, S. Dinardo, S. Mattei, C. Papa, M. Santovito","doi":"10.1109/AGPR.2007.386564","DOIUrl":"https://doi.org/10.1109/AGPR.2007.386564","url":null,"abstract":"SHARAD (SHAllow RADar) is the sub-surface sounding radar provided by the Italian Space Agency (ASI) as a facility instrument to NASA's 2005 Mars Reconnaissance Orbiter (MRO). SHARAD has been launched on August '05 and has started its nominal observation phase since November '06. Primary objective of its investigation is to map, in selected regions, dielectric interfaces to depths of up to one kilometer in the Martian subsurface and to interpret these interfaces in terms of the occurrence and distribution of expected materials, including rock, regolith, water, and ice. SHARAD which is a wideband low-frequency nadir-looking pulse limited radar sounder is expected to map Mars surface with a theoretical range resolution of 15 m in free space propagation, an along-track horizontal resolution of 300-1000 m and an across-track horizontal resolution of 1500-8000 m, depending on spacecraft altitude and terrain roughness. These performances can be reached by means of a focused synthetic aperture processing. The processing chain has been specifically designed and developed by CORISTA within SHARAD Ground Data System development activities with the aim of generating Level 1B products. This paper will be focused on of Level 1B SHARAD data processing description. Some results will be presented using SHARAD first data.","PeriodicalId":411104,"journal":{"name":"2007 4th International Workshop on, Advanced Ground Penetrating Radar","volume":"21 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":"124411208","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: 11