Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970515
R. Solimene, A. Dell’Aversano, G. Leone
Rebar detection can be cast as a the problem of localizing point-like scatterers sparsely enclosed within a prescribed investigation domain. Both TR-MUSIC and Compressed Sensing approaches can deal with it and are compared in this paper. The role of noise on data, data sparseness and mutual coupling are examined by numerical examples.
{"title":"Rebar detection: Comparing MUSIC and COMPRESSED approaches","authors":"R. Solimene, A. Dell’Aversano, G. Leone","doi":"10.1109/ICGPR.2014.6970515","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970515","url":null,"abstract":"Rebar detection can be cast as a the problem of localizing point-like scatterers sparsely enclosed within a prescribed investigation domain. Both TR-MUSIC and Compressed Sensing approaches can deal with it and are compared in this paper. The role of noise on data, data sparseness and mutual coupling are examined by numerical examples.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122720864","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.2014.6970476
V. Yavna, A. Hopersky, A. Nadolinsky, Z. Khakiev
The solution of the GPR inverse problem is considered in application to the context of linearly continuous quasi-homogeneous layers. A new implementation of the solution of Fredholm equation is proposed, allowing to extend the scope of the GPR method for evaluating the complex dielectric permittivity of a medium. The analytical and numerical methods based on Tikhonov regularization theory are developed for solving the Fredholm integral equation of the first kind (convolution) with respect to the required amplitude reflection coefficient. An algorithm is proposed to allocate the boundaries between linearly continuous quasi homogeneous ground layers. Theoretical calculations were performed in the approximation of non-polarized electromagnetic radiation. The quality of developed algorithm was tested by solving the inverse GPR problem for the model of three consecutive transparent non-absorbing layers and its solution is in good agreement with pre-known results.
{"title":"Solving the inverse problem of GPR for linearly continuous quasi-homogeneous layers","authors":"V. Yavna, A. Hopersky, A. Nadolinsky, Z. Khakiev","doi":"10.1109/ICGPR.2014.6970476","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970476","url":null,"abstract":"The solution of the GPR inverse problem is considered in application to the context of linearly continuous quasi-homogeneous layers. A new implementation of the solution of Fredholm equation is proposed, allowing to extend the scope of the GPR method for evaluating the complex dielectric permittivity of a medium. The analytical and numerical methods based on Tikhonov regularization theory are developed for solving the Fredholm integral equation of the first kind (convolution) with respect to the required amplitude reflection coefficient. An algorithm is proposed to allocate the boundaries between linearly continuous quasi homogeneous ground layers. Theoretical calculations were performed in the approximation of non-polarized electromagnetic radiation. The quality of developed algorithm was tested by solving the inverse GPR problem for the model of three consecutive transparent non-absorbing layers and its solution is in good agreement with pre-known results.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128083308","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.2014.6970583
S. Ivashov, V. Razevig, I. Vasiliev, V. Shitikov, T. Bechtel, L. Capineri
Analysis of critical conditions on the spacecrafts Columbia (USA), and the Buran (Russia) related to defects in insulation and heat-protection coatings have been performed. It is shown that the existing methods of non-destructive testing, including ultrasound, failed to prevent the disaster of the Space Shuttle Columbia and serious incidents involving spacecraft Buran during its only flight. A new method for using the holographic subsurface radar RASCAN-5/15000 which reveals the internal defects of the coating was proposed and experiments on models of thermal insulation coatings were performed. The experimental results were displayed in the form of radar images on which defects in the heat insulation provided a good contrast.
{"title":"Diagnostics of thermal insulation and heat protection coating of space ships and rockets by holographic subsurface radar","authors":"S. Ivashov, V. Razevig, I. Vasiliev, V. Shitikov, T. Bechtel, L. Capineri","doi":"10.1109/ICGPR.2014.6970583","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970583","url":null,"abstract":"Analysis of critical conditions on the spacecrafts Columbia (USA), and the Buran (Russia) related to defects in insulation and heat-protection coatings have been performed. It is shown that the existing methods of non-destructive testing, including ultrasound, failed to prevent the disaster of the Space Shuttle Columbia and serious incidents involving spacecraft Buran during its only flight. A new method for using the holographic subsurface radar RASCAN-5/15000 which reveals the internal defects of the coating was proposed and experiments on models of thermal insulation coatings were performed. The experimental results were displayed in the form of radar images on which defects in the heat insulation provided a good contrast.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133490859","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.2014.6970494
Fei Wang, Sixin Liu, Xinxin Qu
We presented a ray-based iteratively traveltime tomography algorithm for crosshole radar direct-arrival data using the multistencils fast marching method (MSFM). The proposed scheme used MSFM to compute the traveltime solution at each grid point by solving the traveltime eikonal equation along several stencils and picked the solution that satisfies the upwind condition. Curved raypaths, which were needed for the construction of the Jacobi matrix during inversion, were generated using the steepest descent technique. The solutions were achieved by an iteratively linearized inversion approach. We tested the suggested method on three synthetic data sets and a field data set. The reconstruction results indicated that the MSFM algorithm is very suitable for crosshole radar traveltime tomography and the proposed scheme is considered to be an efficient crosshole radar traveltime tomography technique.
{"title":"Ray-based crosshole radar traveltime tomography using MSFM method","authors":"Fei Wang, Sixin Liu, Xinxin Qu","doi":"10.1109/ICGPR.2014.6970494","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970494","url":null,"abstract":"We presented a ray-based iteratively traveltime tomography algorithm for crosshole radar direct-arrival data using the multistencils fast marching method (MSFM). The proposed scheme used MSFM to compute the traveltime solution at each grid point by solving the traveltime eikonal equation along several stencils and picked the solution that satisfies the upwind condition. Curved raypaths, which were needed for the construction of the Jacobi matrix during inversion, were generated using the steepest descent technique. The solutions were achieved by an iteratively linearized inversion approach. We tested the suggested method on three synthetic data sets and a field data set. The reconstruction results indicated that the MSFM algorithm is very suitable for crosshole radar traveltime tomography and the proposed scheme is considered to be an efficient crosshole radar traveltime tomography technique.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133947316","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.2014.6970413
F. André, M. Jonard, S. Lambot
Forest soil organic horizons constitute a major component of forest ecosystems and their accurate characterization is of prime importance for ecological studies as well as for carbon cycle and global change related studies. In other respects, the presence of forest litter is known to influence remote sensing radar data over forested areas and precise determination of litter radiative properties is necessary for proper processing of these data. In the present study, ultra wideband (0.8-4.0 GHz) ground-penetrating radar (GPR) data were collected above the forest floor of a beech forest with different litter layer thicknesses so as to examine the effect of litter on the backscattered radar signal and to investigate the potentialities of GPR for reconstructing litter constitutive properties. Full-wave inversion was used to process the radar data. Attenuation of the radar signal was found to increase as both operating frequency and litter thickness increase, as a result of the occurrence of dielectric and scattering losses within litter. Frequency dependence of the apparent electrical conductivity of litter was considered in the radar model to account for these phenomena. Close correspondence was observed between estimated and measured litter thicknesses and signal inversions provided reliable estimates of litter electromagnetic properties. These results show promising potentialities of the GPR technique for providing accurate and non-invasive characterization of forest litter.
{"title":"Full-wave inversion of ground-penetrating radar data for forest litter characterization","authors":"F. André, M. Jonard, S. Lambot","doi":"10.1109/ICGPR.2014.6970413","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970413","url":null,"abstract":"Forest soil organic horizons constitute a major component of forest ecosystems and their accurate characterization is of prime importance for ecological studies as well as for carbon cycle and global change related studies. In other respects, the presence of forest litter is known to influence remote sensing radar data over forested areas and precise determination of litter radiative properties is necessary for proper processing of these data. In the present study, ultra wideband (0.8-4.0 GHz) ground-penetrating radar (GPR) data were collected above the forest floor of a beech forest with different litter layer thicknesses so as to examine the effect of litter on the backscattered radar signal and to investigate the potentialities of GPR for reconstructing litter constitutive properties. Full-wave inversion was used to process the radar data. Attenuation of the radar signal was found to increase as both operating frequency and litter thickness increase, as a result of the occurrence of dielectric and scattering losses within litter. Frequency dependence of the apparent electrical conductivity of litter was considered in the radar model to account for these phenomena. Close correspondence was observed between estimated and measured litter thicknesses and signal inversions provided reliable estimates of litter electromagnetic properties. These results show promising potentialities of the GPR technique for providing accurate and non-invasive characterization of forest litter.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":"34 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132286724","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.2014.6970503
Haewon Jung, Kangwook Kim, Dong Kyoo Kim, Jin-Myung Kim
In the pavement inspection ground-penetrating radar system, the antenna array is mounted on a vehicle, which moves at a high speed. To image the pavement, the data in the frequency domain need to be processed rapidly on a digital signal processor (DSP). The DSP can be made to operate at a higher speed when the processing is based on a fixed-point data type. In this paper, the responses from far targets are shown to suffer from precision loss when they are processed on a fixed-point data type. A compensation filter to prevent the precision loss is presented. The filter is applied in the frequency domain before the time-domain transformation. The filter is applied to the measured data using ultra-wideband radar and shown to generate clear images of both near and far targets.
{"title":"DSP implementation of rapid imaging of data obtained from UWB radar for use in a pavement inspection GPR system","authors":"Haewon Jung, Kangwook Kim, Dong Kyoo Kim, Jin-Myung Kim","doi":"10.1109/ICGPR.2014.6970503","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970503","url":null,"abstract":"In the pavement inspection ground-penetrating radar system, the antenna array is mounted on a vehicle, which moves at a high speed. To image the pavement, the data in the frequency domain need to be processed rapidly on a digital signal processor (DSP). The DSP can be made to operate at a higher speed when the processing is based on a fixed-point data type. In this paper, the responses from far targets are shown to suffer from precision loss when they are processed on a fixed-point data type. A compensation filter to prevent the precision loss is presented. The filter is applied in the frequency domain before the time-domain transformation. The filter is applied to the measured data using ultra-wideband radar and shown to generate clear images of both near and far targets.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132339938","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.2014.6970542
V. Paraforou, D. Caratelli, D. Tran
We report an advanced mathematical method featuring both antenna miniaturization and bandwidth enhancement for super wideband (SWB) antennas intended for advanced GPR applications. By implementing the supershape formula a wide range of practical antenna shapes can be described by just three design parameters, facilitating a lot the optimum antenna design. As a proof-of-concept, a PCB-based, balanced-fed antenna is presented and demonstrated. Our antenna design exhibits SWB characteristics since it operates in the frequency range 0.48 - 10.2GHz meeting the trade-off requirements for depth penetration and range resolution. Additionally, the employed floated ground plane yields a unidirectional broadside radiation pattern making the use of shielding and absorbing cavity unnecessary. Pattern stability is observed over the whole operating frequency range. In time-domain, a low pulse late-time ringing was achieved through the radiator shape optimization and the thin absorbing layer introduction as resistive loading method.
{"title":"A novel low-profile SWB unidirectional supershaped antenna for advanced ground penetrating radar applications","authors":"V. Paraforou, D. Caratelli, D. Tran","doi":"10.1109/ICGPR.2014.6970542","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970542","url":null,"abstract":"We report an advanced mathematical method featuring both antenna miniaturization and bandwidth enhancement for super wideband (SWB) antennas intended for advanced GPR applications. By implementing the supershape formula a wide range of practical antenna shapes can be described by just three design parameters, facilitating a lot the optimum antenna design. As a proof-of-concept, a PCB-based, balanced-fed antenna is presented and demonstrated. Our antenna design exhibits SWB characteristics since it operates in the frequency range 0.48 - 10.2GHz meeting the trade-off requirements for depth penetration and range resolution. Additionally, the employed floated ground plane yields a unidirectional broadside radiation pattern making the use of shielding and absorbing cavity unnecessary. Pattern stability is observed over the whole operating frequency range. In time-domain, a low pulse late-time ringing was achieved through the radiator shape optimization and the thin absorbing layer introduction as resistive loading method.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134591221","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":"115 1","pages":"0"},"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.2014.6970428
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":"7 1","pages":"0"},"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.2014.6970544
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":"37 1","pages":"0"},"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}
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