Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970541
K. Wada, S. Karasawa, K. Kawata, S. Ebihara
This paper describes a new directional borehole radar system and its field testing. The system uses a thin radar probe (57 mm diameter) and a circular dipole array directive antenna. The radar is of the step frequency type with a network analyzer. Through careful antenna design, we were able to achieve the compact radar probe and precise measurement at frequencies between 5 and 500 MHz. All the associated surface electronics for the radar system can be fit into a small carrying case. The radar probe includes a triaxial accelerometer, a triaxial compass, an angular velocity sensor and a thermometer. Data from these sensors can be used to compensate for the rotation and inclination of the radar probe, and this enables us to locate reflection points in 3-D space correctly. All the data acquired by the radar probe were sent to the processing electronics via an optical link, and the data was updated in real time. Our field testing confirmed that system accuracy for determining arrival directions was better than 10 degrees between 30 and 180 MHz in wet soil. We demonstrated 3-D location of a buried cylindrical conducting object, which was set 2 m from the radar in wet soil. After system calibration and signal processing, we were able to estimate the reflection point position with an accuracy of 41 cm.
{"title":"Small-diameter directional borehole radar system with 3D sensing capability","authors":"K. Wada, S. Karasawa, K. Kawata, S. Ebihara","doi":"10.1109/ICGPR.2014.6970541","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970541","url":null,"abstract":"This paper describes a new directional borehole radar system and its field testing. The system uses a thin radar probe (57 mm diameter) and a circular dipole array directive antenna. The radar is of the step frequency type with a network analyzer. Through careful antenna design, we were able to achieve the compact radar probe and precise measurement at frequencies between 5 and 500 MHz. All the associated surface electronics for the radar system can be fit into a small carrying case. The radar probe includes a triaxial accelerometer, a triaxial compass, an angular velocity sensor and a thermometer. Data from these sensors can be used to compensate for the rotation and inclination of the radar probe, and this enables us to locate reflection points in 3-D space correctly. All the data acquired by the radar probe were sent to the processing electronics via an optical link, and the data was updated in real time. Our field testing confirmed that system accuracy for determining arrival directions was better than 10 degrees between 30 and 180 MHz in wet soil. We demonstrated 3-D location of a buried cylindrical conducting object, which was set 2 m from the radar in wet soil. After system calibration and signal processing, we were able to estimate the reflection point position with an accuracy of 41 cm.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115409919","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970428
Cerca Mariano, C. Dora, Aranda-Gomez Jose Jorge, Luis Rocha-Trevino
Large scale sinking (ca. 15 m) of lake deposits within the Parangueo maar crater (México) has been observed after drying of its perennial lake in the mid 1980's. Deformation is characterized by a main ring-shaped normal fault accompanied by gravitational sliding and gliding of mud blocks, and folding at the foot of the slides. Domes, caused by mud injections triggered by overpressure, are associated with the folds. A GPR survey of the crater included two profiles ~1000 m each that were continuously recorded across the crater. A SIR-20 equipment with 200 MHz antenna was employed for the surveys and processing of GPR data included a detailed topographic correction. Reflectors in the radargrams were correlated with layers observed in small excavations made in the lacustrine sequence and allowed the estimation of a propagation velocity of 0.075 m/ns. Shallow reflectors were recorded interpreted as layers, fractures, faults, or mud domes as observed in unstacked profiles. Likewise, the radar signature of continuous reflectors can be related with the spatial distribution of evaporite concentrations within the lake basin where water content increases. The complete GPR profiles allowed the identification of major deformation structures and give insights on the differences in the structural styles along the ring fault. The GPR results were of great importance for a better understanding of the geometry and distribution of structures near the surface related to land subsidence in fine grained materials.
{"title":"GPR profiles for characterizing subsidence deformation in lake sediments within a maar crater","authors":"Cerca Mariano, C. Dora, Aranda-Gomez Jose Jorge, Luis Rocha-Trevino","doi":"10.1109/ICGPR.2014.6970428","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970428","url":null,"abstract":"Large scale sinking (ca. 15 m) of lake deposits within the Parangueo maar crater (México) has been observed after drying of its perennial lake in the mid 1980's. Deformation is characterized by a main ring-shaped normal fault accompanied by gravitational sliding and gliding of mud blocks, and folding at the foot of the slides. Domes, caused by mud injections triggered by overpressure, are associated with the folds. A GPR survey of the crater included two profiles ~1000 m each that were continuously recorded across the crater. A SIR-20 equipment with 200 MHz antenna was employed for the surveys and processing of GPR data included a detailed topographic correction. Reflectors in the radargrams were correlated with layers observed in small excavations made in the lacustrine sequence and allowed the estimation of a propagation velocity of 0.075 m/ns. Shallow reflectors were recorded interpreted as layers, fractures, faults, or mud domes as observed in unstacked profiles. Likewise, the radar signature of continuous reflectors can be related with the spatial distribution of evaporite concentrations within the lake basin where water content increases. The complete GPR profiles allowed the identification of major deformation structures and give insights on the differences in the structural styles along the ring fault. The GPR results were of great importance for a better understanding of the geometry and distribution of structures near the surface related to land subsidence in fine grained materials.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124849614","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970433
L. Fedorova, K. Sokolov, D. Savvin, G. Kulyandin
The possibility of using the variance amplitude of GPR signal has been considered for investigating the structural features of the geological environments of permafrost. The variance values of the investigated GPR data of the properties and the state of soil areas of alluvial gold and diamonds in Yakutia province in Siberia have been calculated. It is established that the increase of the variance amplitudes of signals is characterized by the appearance of new reflection boundaries and the presence of geostructural rock mass heterogeneity. This is due to an increase in soil moisture and violation of the rock mass. Analysis of the features of the change the variance amplitudes of signals in the rock section allows us to define the type of geological heterogeneity and permittivity of rock. The proposed method of statistical analysis of GPR data simplifies the interpretation and allows us to automate the search for irregularities of the physical properties of rocks using specially developed software.
{"title":"Analysis of variance amplitudes of signals for detecting structural permafrost heterogeneities by ground penetrating radar","authors":"L. Fedorova, K. Sokolov, D. Savvin, G. Kulyandin","doi":"10.1109/ICGPR.2014.6970433","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970433","url":null,"abstract":"The possibility of using the variance amplitude of GPR signal has been considered for investigating the structural features of the geological environments of permafrost. The variance values of the investigated GPR data of the properties and the state of soil areas of alluvial gold and diamonds in Yakutia province in Siberia have been calculated. It is established that the increase of the variance amplitudes of signals is characterized by the appearance of new reflection boundaries and the presence of geostructural rock mass heterogeneity. This is due to an increase in soil moisture and violation of the rock mass. Analysis of the features of the change the variance amplitudes of signals in the rock section allows us to define the type of geological heterogeneity and permittivity of rock. The proposed method of statistical analysis of GPR data simplifies the interpretation and allows us to automate the search for irregularities of the physical properties of rocks using specially developed software.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123914496","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970544
M. Biancheri-Astier, A. Saintenoy, V. Ciarletti
We present the project of developing a radar system presenting agility resulting from a great versatility in the emission of the wavefront. The idea is to build a system using an array of antennas that can automatically reconfigure itself to focus its radiance on a desired target. This new microwave sensor is intended to detect and characterize a target burried in a medium that can be inhomogeneous in various fields like geophysics, medical, planetology, .... The aim is illustrated by analytical simulations using the DORT method. The instrumental developments are described, with numerical validations of the principle of misalignment of the antenna beam. The project emerged after a CNES R&T study for modify the prototype of WISDOM radar.
{"title":"Development of an Agile beam georadar prototype for the investigation of pLanetary environment (AGILE)","authors":"M. Biancheri-Astier, A. Saintenoy, V. Ciarletti","doi":"10.1109/ICGPR.2014.6970544","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970544","url":null,"abstract":"We present the project of developing a radar system presenting agility resulting from a great versatility in the emission of the wavefront. The idea is to build a system using an array of antennas that can automatically reconfigure itself to focus its radiance on a desired target. This new microwave sensor is intended to detect and characterize a target burried in a medium that can be inhomogeneous in various fields like geophysics, medical, planetology, .... The aim is illustrated by analytical simulations using the DORT method. The instrumental developments are described, with numerical validations of the principle of misalignment of the antenna beam. The project emerged after a CNES R&T study for modify the prototype of WISDOM radar.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125143834","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970548
J. Hugenschmidt, A. Herlyn
The increasing amount of subsurface infrastructure requires a large number of excavation works on existing roads and pavements. After the completion of such work and the reconditioning of the pavement surface, cracks and other pavement damage can be observed in many cases. A relationship between excavation work and subsequent damages has been suggested. In a study aiming at an evaluation of a possible relationship, GPR data were acquired and analyzed on several roads where excavations had been carried out and where pavement damage had occurred in the vicinity. In many cases it was possible to establish a correlation between subsurface structures obtained by GPR and damages visible on the pavement surface. This paper presents acquisition, processing and interpretation of GPR data together with a statistical analysis of the results. In addition, typical GPR reflection patterns are presented and discussed. The results presented in this paper were obtained in a project supported by the Swiss Federal Roads Office (FEDRO).
{"title":"Damages in pavements caused by previous excavation work?","authors":"J. Hugenschmidt, A. Herlyn","doi":"10.1109/ICGPR.2014.6970548","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970548","url":null,"abstract":"The increasing amount of subsurface infrastructure requires a large number of excavation works on existing roads and pavements. After the completion of such work and the reconditioning of the pavement surface, cracks and other pavement damage can be observed in many cases. A relationship between excavation work and subsequent damages has been suggested. In a study aiming at an evaluation of a possible relationship, GPR data were acquired and analyzed on several roads where excavations had been carried out and where pavement damage had occurred in the vicinity. In many cases it was possible to establish a correlation between subsurface structures obtained by GPR and damages visible on the pavement surface. This paper presents acquisition, processing and interpretation of GPR data together with a statistical analysis of the results. In addition, typical GPR reflection patterns are presented and discussed. The results presented in this paper were obtained in a project supported by the Swiss Federal Roads Office (FEDRO).","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125569382","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970404
Jing Li, Z. Zeng, Lingna Chen, Fengshan Liu
In the vadose zone, soil has become an object of research due to its importance for environmental issues. Description and estimation of the mixed soil water content or dielectric parameter is the essential condition and the key to improving soil investigation with GPR detection. In this paper, first of all, a way to describe 3D random media which the preferred orientation of the multi-scale inhomogeneity is proposed and the importance of reducing the numerical errors with tapering function is stated. Then, we apply the FDTD method to simulate the GPR signal response of random model and use S-transform to test the simulation accuracy. For the complex random soil media, conventional method likes transmission wave method provide model parameter estimation of limited resolution only. Here, we apply a novel reflection amplitude inversion workflow for GPR data which is capable of resolving the subsurface dielectric permittivity and related water content distribution with markedly improved resolution. The synthetic results demonstrate that this method has extensive applicability in complex mixed random soil media detection and physics parameters estimation.
{"title":"Estimation of mixed soil water content by impedance inversion of GPR data","authors":"Jing Li, Z. Zeng, Lingna Chen, Fengshan Liu","doi":"10.1109/ICGPR.2014.6970404","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970404","url":null,"abstract":"In the vadose zone, soil has become an object of research due to its importance for environmental issues. Description and estimation of the mixed soil water content or dielectric parameter is the essential condition and the key to improving soil investigation with GPR detection. In this paper, first of all, a way to describe 3D random media which the preferred orientation of the multi-scale inhomogeneity is proposed and the importance of reducing the numerical errors with tapering function is stated. Then, we apply the FDTD method to simulate the GPR signal response of random model and use S-transform to test the simulation accuracy. For the complex random soil media, conventional method likes transmission wave method provide model parameter estimation of limited resolution only. Here, we apply a novel reflection amplitude inversion workflow for GPR data which is capable of resolving the subsurface dielectric permittivity and related water content distribution with markedly improved resolution. The synthetic results demonstrate that this method has extensive applicability in complex mixed random soil media detection and physics parameters estimation.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128066039","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970520
A. P. Annan, N. Diamanti, J. Redman
Regulatory emission limits now exist for Ultra Wideband (UWB) ground penetrating radar (GPR) in a number of jurisdictions. The regulations are defined using the concepts and terminology more suited to traditional narrow band radio transmitters. Limited theoretical and experimental information on the emissions from GPR devices have made arguing a compelling case for less stringent emissions levels extremely difficult. Further, the current regulations have the potential to trigger a review on current emission limits in the future. In this paper, we focus on the basic steps needed to translate GPR results into 'regulatory' parameters. We anticipate this will take several years. The ultimate goal is to provide the basis for more sensible rule making, if and when, the regulatory standards come under scrutiny for revision.
{"title":"GPR emissions and regulatory limits","authors":"A. P. Annan, N. Diamanti, J. Redman","doi":"10.1109/ICGPR.2014.6970520","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970520","url":null,"abstract":"Regulatory emission limits now exist for Ultra Wideband (UWB) ground penetrating radar (GPR) in a number of jurisdictions. The regulations are defined using the concepts and terminology more suited to traditional narrow band radio transmitters. Limited theoretical and experimental information on the emissions from GPR devices have made arguing a compelling case for less stringent emissions levels extremely difficult. Further, the current regulations have the potential to trigger a review on current emission limits in the future. In this paper, we focus on the basic steps needed to translate GPR results into 'regulatory' parameters. We anticipate this will take several years. The ultimate goal is to provide the basis for more sensible rule making, if and when, the regulatory standards come under scrutiny for revision.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128508834","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970459
H. Liu, C. Koyama, K. Takahashi, M. Sato
A full-polarimetric radar system for non-contact, non-destructive high-resolution imaging and inspection of wooden buildings damaged by earthquakes is developed. The stepped frequency continuous wave system is based on a network analyzer and employs a multi-channel antenna array consisting of four linearly polarized Vivaldi antennas operating in an ultra-wideband ranging from 1 GHz to 20 GHz. The signal processing methods for high-resolution 3D imaging and polarimetric analysis are introduced in this paper. We conducted two-dimensional scans on damaged wooden wall specimens in the laboratory. The measurement is carried out at a five mm step. The results indicate that the microwaves up to 20 GHz can penetrate the wooden walls. Cracks and deformations of wooden structures inside the wall, as well as of metal nails and bolts can be clearly imaged. The observed radar signatures related to the damaged wooden structures are discussed. Our findings demonstrate that the polarimetric radar technique is able to provide richer information than conventional single-polarization subsurface penetrating radar.
{"title":"High-resolution imaging of damaged wooden structures for building inspection by polarimetric radar","authors":"H. Liu, C. Koyama, K. Takahashi, M. Sato","doi":"10.1109/ICGPR.2014.6970459","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970459","url":null,"abstract":"A full-polarimetric radar system for non-contact, non-destructive high-resolution imaging and inspection of wooden buildings damaged by earthquakes is developed. The stepped frequency continuous wave system is based on a network analyzer and employs a multi-channel antenna array consisting of four linearly polarized Vivaldi antennas operating in an ultra-wideband ranging from 1 GHz to 20 GHz. The signal processing methods for high-resolution 3D imaging and polarimetric analysis are introduced in this paper. We conducted two-dimensional scans on damaged wooden wall specimens in the laboratory. The measurement is carried out at a five mm step. The results indicate that the microwaves up to 20 GHz can penetrate the wooden walls. Cracks and deformations of wooden structures inside the wall, as well as of metal nails and bolts can be clearly imaged. The observed radar signatures related to the damaged wooden structures are discussed. Our findings demonstrate that the polarimetric radar technique is able to provide richer information than conventional single-polarization subsurface penetrating radar.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124579200","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970498
Motoyuki Sato, Kazunori Takahashi, Li Yi
This paper focuses on 3-dimensional (3D) image reconstruction by ground penetrating radar (GPR) data. Conventionally, we acquired a GPR gridded dataset with a fine interval, which satisfies the Nyquist spatial sampling criterion for an antenna. However, it takes long time for data acquisition. In this study, we tried two different approaches to reconstruct the image with sparse data that violated the Nyquist spatial sampling criterion: A non-gridded 3D migration method and a new interpolation method based on Projection onto convex sets (POCS) and frequency-wave number (f-k) filtering. Both methods are demonstrated with sand pit experiment datasets and a field experiment data that is acquired by our 3DGPR system. The results shows that both the non-gridded 3D migration method and the interpolation method can reconstruct the main target (a metal pipe at 0.8 m depth) well with the average spatial interval that equals to half wave length. But the non-gridded migration results (especially in shallow depth) suffer from the migration artifacts. The migrated result after interpolation is also demonstrated, and the migration artifacts can be reduced. These results indicate that it is possible to reduce the data density.
{"title":"Optimization of data sampling and image reconstruction by GPR","authors":"Motoyuki Sato, Kazunori Takahashi, Li Yi","doi":"10.1109/ICGPR.2014.6970498","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970498","url":null,"abstract":"This paper focuses on 3-dimensional (3D) image reconstruction by ground penetrating radar (GPR) data. Conventionally, we acquired a GPR gridded dataset with a fine interval, which satisfies the Nyquist spatial sampling criterion for an antenna. However, it takes long time for data acquisition. In this study, we tried two different approaches to reconstruct the image with sparse data that violated the Nyquist spatial sampling criterion: A non-gridded 3D migration method and a new interpolation method based on Projection onto convex sets (POCS) and frequency-wave number (f-k) filtering. Both methods are demonstrated with sand pit experiment datasets and a field experiment data that is acquired by our 3DGPR system. The results shows that both the non-gridded 3D migration method and the interpolation method can reconstruct the main target (a metal pipe at 0.8 m depth) well with the average spatial interval that equals to half wave length. But the non-gridded migration results (especially in shallow depth) suffer from the migration artifacts. The migrated result after interpolation is also demonstrated, and the migration artifacts can be reduced. These results indicate that it is possible to reduce the data density.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124649818","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970432
L. Fedorova, K. Sokolov, D. Savvin, V. Fedorov, G. Kulyandin
GPR models are instrumental in improving procedures of signal processing and developing indicators for GPR data interpretation. The paper presents GPR models of basic types of geostructural discontinuities in alluvial placers of Yakutia. Frozen rock massif of placer deposits is characterized by layered structure and includes discontinuities related to disturbance of rock, relict streams, and boulder inclusions where minerals are usually concentrated. It has been shown that geostructural discontinuities of diamond placer areas indicate an anomaly of waveform as chaotic distribution of GPR signals. Field data processing resulted in identification of the zone of bedrock discontinuity in the diamond deposit Mayat (Yakutia province in Siberia). Analysis of GPR data and geological sampling results allowed us to refine the outline of the placer rich in diamonds.
{"title":"GPR modeling of placer deposits geological profiles of permafrost zone","authors":"L. Fedorova, K. Sokolov, D. Savvin, V. Fedorov, G. Kulyandin","doi":"10.1109/ICGPR.2014.6970432","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970432","url":null,"abstract":"GPR models are instrumental in improving procedures of signal processing and developing indicators for GPR data interpretation. The paper presents GPR models of basic types of geostructural discontinuities in alluvial placers of Yakutia. Frozen rock massif of placer deposits is characterized by layered structure and includes discontinuities related to disturbance of rock, relict streams, and boulder inclusions where minerals are usually concentrated. It has been shown that geostructural discontinuities of diamond placer areas indicate an anomaly of waveform as chaotic distribution of GPR signals. Field data processing resulted in identification of the zone of bedrock discontinuity in the diamond deposit Mayat (Yakutia province in Siberia). Analysis of GPR data and geological sampling results allowed us to refine the outline of the placer rich in diamonds.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131131300","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}
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