2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)最新文献_第3页

Mapping of permafrost surface and active layer properties using GPR: A comparison of frequency dependencies 利用探地雷达测绘永久冻土表层和活动层的性质:频率相关性的比较

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963837

G. Gacitúa, J. Uribe, M. Tamstorf, S. Kristiansen

{"title":"Mapping of permafrost surface and active layer properties using GPR: A comparison of frequency dependencies","authors":"G. Gacitúa, J. Uribe, M. Tamstorf, S. Kristiansen","doi":"10.1109/IWAGPR.2011.5963837","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963837","url":null,"abstract":"Ground penetrating radar (GPR) was used to detect internal features and conditions in the active layer of Zackenberg valley in North-East Greenland. For about 16 years there has been a monitoring programme that registers the physical and biological processes in the ecosystem. We aim to improve the monitoring accuracy of the active layer development and estimated soil water content. We used two different GPR frequencies to study their performance in High-Arctic cryoturbated soils. Here we present the analysis of the signal received by quantifying the power of the signal that is reflected from the top of the permafrost and from the internal features in the unfrozen soil. These results will be further used to determine the distribution of dielectric heterogeneities to support water content estimated from the same profiles. Comparing results from 400 and 800 MHz, we found that although both frequencies are suitable to measure thickness and to detect features in the active layer, the 400 MHz gives a better impression of the influence of the dielectric contrast effect from top of the permafrost zone which can be used to quantify the soil water content.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128069911","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

Time-lapse monitoring of DNAPL in a controlled cell 受控细胞中DNAPL的延时监测

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963877

L. Orlando, B. Renzi

引用次数: 2

Landmine detection using boosting classifiers with adaptive feature selection 基于自适应特征选择的增强分类器的地雷探测

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963887

Yun-fei Shi, Qian Song, T. Jin, Zhimin Zhou

引用次数: 5

Adaptative Stolt migration via contrast maximization for GPR applications GPR应用中对比度最大化的自适应Stolt迁移

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963855

M. González-Huici

引用次数: 9

Airborne ground penetrating radar imaging of buried targets: A tomographic approach 埋地目标的机载探地雷达成像:层析成像方法

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963886

I. Catapano, L. Crocco, F. Soldovieri

引用次数: 6

High resolution imaging of the unsaturated and saturated zones of a gravel aquifer using full-waveform inversion 全波形反演砾石含水层非饱和带和饱和带的高分辨率成像

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963911

A. Klotzsche, J. van der Kruk, H. Vereecken, G. Meles, J. Doetsch, H. Maurer, S. Greenhalgh, A. Green, N. Linde

{"title":"High resolution imaging of the unsaturated and saturated zones of a gravel aquifer using full-waveform inversion","authors":"A. Klotzsche, J. van der Kruk, H. Vereecken, G. Meles, J. Doetsch, H. Maurer, S. Greenhalgh, A. Green, N. Linde","doi":"10.1109/IWAGPR.2011.5963911","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963911","url":null,"abstract":"Full-waveform inversion can significantly improve imaging results of cross-hole GPR data compared to conventional ray-based inversion schemes. Recently, a 2D full-waveform finite difference time domain (FDTD) approach was used to invert cross-hole GPR data measured in the saturated zone of a gravel aquifer. Due to water table refractions and reflections, the upper part of the aquifer was not reliably imaged. Here, we reconstruct the upper part of the aquifer by imaging both the saturated and unsaturated zones. Estimating one effective wavelet, as was done for the saturated zone inversion alone, is insufficient because the effective wavelet strongly depends on the location of both the transmitter and receiver antennas. Therefore, four different source wavelets were estimated for the different combinations of antennas placement in the two zones, and the full-waveform inversion algorithm adapted accordingly. This resulted in improved images of the aquifer. In general, the observed and the synthetic traces show a good correspondence in both shape and amplitude. For the transmitters in the unsaturated domain, the amplitude fit was not optimum and can probably be improved by adjusting the conductivity starting model.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122114362","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

Maxwell curl equation datuming for GPR test of tunnel grouting based on Kirchhoff integral solution 基于Kirchhoff积分解的隧道注浆探地雷达试验麦克斯韦旋度方程

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963853

Yonghui Zhao, Jun Chen, S. Ge

{"title":"Maxwell curl equation datuming for GPR test of tunnel grouting based on Kirchhoff integral solution","authors":"Yonghui Zhao, Jun Chen, S. Ge","doi":"10.1109/IWAGPR.2011.5963853","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963853","url":null,"abstract":"In two-dimensional (2D) ground penetrating radar (GPR) data, the reflection from the detection targets in depth are severely obscured by the strong scattering generated from near-surface non-target structures. For using GPR as a geotechnical non-destructive testing device, how to eliminate the strong scattering caused by near-surface rebars in the tunnel liner to image and assess the grouting condition behind tunnel liner is still an unsolved problem. This study proposed a method for the reconstruction of deep GPR images, termed the Maxwell curl equation datuming. To eliminate the deleterious effect caused by near-surface diffractive scattering, we have redefined the reference surface to an actual geologic interface by using Maxwell curl equation datuming methodology based on Kirchhoff integral solution. Maxwell curl equation datuming procedure can redefine the reference surface into deeper horizon on which the GPR transmitters and receivers appear to be located. Case studies were presented for synthetic examples and real GPR data for assessments of tunnel grouting. The results show that the datuming technique based on Maxwell curl equation, is able to eliminate the strong scattering related to near-surface rebars in tunnel liners, and improve the quality of deeper images beneath the tunnel liners. The Maxwell curl equation datuming is also applicable to other GPR testing situations that depend on the elimination of scattering effects caused by near-surface structures.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130120522","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

Frequency dependent attenuation of GPR data as a tool for material property characterization: A review and new developments 探地雷达数据的频率相关衰减作为材料特性表征的工具:综述和新进展

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963870

J. Bradford

引用次数: 8

Vertical soil moisture dynamics in the vadose zone: A high-resolution GPR reflection study 渗透带垂直土壤水分动态:高分辨率探地雷达反射研究

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963900

C. Steelman, A. Endres

引用次数: 2

Electromagnetic soil properties and performance of GPR for landmine detection: How to measure, how to analyse and how to classify? 地雷探测用探地雷达电磁土壤特性与性能:如何测量、如何分析、如何分类?

2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963880

J. Igel, Kazunori Takahashi, H. Preetz

引用次数: 4