Relevant bibliographies by topics / Georadars

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Georadars'

Author: Grafiati
Published: 28 May 2022
Last updated: 18 July 2025

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Journal articles on the topic "Georadars"

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Batrakov, D. O., M. M. Kovalov, A. G. Batrakova, and S. N. Urdzik. "Non-destructive monitoring of highways using georadar (review article, part II)." Visnyk of V.N. Karazin Kharkiv National University, series “Radio Physics and Electronics”, no. 36 (June 28, 2022): 7–20. https://doi.org/10.26565/2311-0872-2022-36-01.

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Relevance. The relevance of the research presented in the article is primarily due to the focus on the implementation of the state strategy to ensure the reliability and prolong the residual life of transport and engineering structures. Implementation is associated with methods and means of obtaining information and processing it in real time, as well as methods of assessing the condition of engineering structures, which are characterized by significant heterogeneity of geometric and physical-mechanical parameters. It is clear that this complicates the use of diagnostic results. However, despite the advantages of wave sounding methods, the use of such methods is constrained by the difficulty of interpreting the results and related errors in determining the parameters of structures, as well as multifactorial tasks of estimating the parameters of multicomponent materials and imperfections of existing methods of defectoscopy. The aim of the work is to review the capabilities of modern pulsed georadars, as well as means of processing ultra-wideband signals together with computer-oriented numerical simulation systems and optimize methods of georadar data processing to solve problems of detection and identification of subsurface inhomogeneities in application of flat-layered medium models. Materials and methods. The second part of the article provides a brief overview of modern methods of processing data sets obtained using pulsed georadars. To achieve the goal it was necessary to solve several tasks. The first task is to select the optimal technical means to obtain source information, as well as substantiation of the technical characteristics of georadars. Another task is to develop effective methods of processing the data. The last task is to establish the relationship of the obtained data with the geometric and physico-mechanical characteristics of the road surface. Results. The basis of the obtained results is remote sensing data, as well as the proposed mathematical models and methods of remote sensing data processing. Based on the results of a comparative analysis of the capabilities of pulsed georadars, the paper offers practical recommendations for improving the reliability of search and identification of defects such as subsurface cracks and areas of loss of interlayer adhesion between layers of pavement. Conclusions. The results of laboratory experiments presented in the article testify to the powerful possibilities of modern remote sensing technologies. The analysis of the existing means of remote sensing, first of all, with the help of georadars allowed to formulate a qualitatively new approach to solving the current problem of detecting hidden defects in layered structures. It should also be noted that there are opportunities to improve technical means and methods of georadar data processing.
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Grecheneva, A. V., N. V. Dorofeev, O. R. Kuzichkin, D. I. Surzhik, and R. V. Romanov. "The method of forming probing signals of georadars on the basis of direct digital synthesizers for geodynamic monitoring." MATEC Web of Conferences 272 (2019): 01044. http://dx.doi.org/10.1051/matecconf/201927201044.

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The features of the formation of probing signals based on direct digital synthesizers for geodynamic monitoring of medias using georadar probing are considered in the article. The basic requirements for the formers of probing signals and the shortcomings of known technical solutions are shown. To eliminate them, as a former of probing signals of georadars was suggested to use direct digital synthesizers with improved spectral characteristics, achieved by introducing circuit of an automatic compensation of phase distortion with a control device in the form of a phase-locked loop. With this construction, the device contains a combination of autocompensation and filter methods of improving the spectral characteristics of the output signal of the synthesizer. To analyze the effectiveness of the proposed solutions, were obtained the necessary mathematical relationships describing the functioning of the device under research and implemented its schematic simulation, which showed the possibility of improving the spectral characteristics of the proposed former of probing signals by 10-15 dB.
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Batrakov, D. O., М. М. Kovalov, А. О. Maslennikov, А. G. Batrakova, and S. N. Urdzik. "Non-destructive control of roads by georadars (review article, part I)." 35, no. 35 (December 29, 2021): 27–38. http://dx.doi.org/10.26565/2311-0872-2021-35-03.

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Relevance. The relevance of the studies outlined in the article is due to their focus on the implementation of the state strategy for ensuring the reliability and extending the resource of transport and engineering structures, the implementation of which is associated with the methods and means of obtaining information and processing it in real time; methods for assessing the state of engineering structures, a feature of which is a significant heterogeneity of geometric and physical-mechanical parameters, which complicates the use of diagnostic results. With the obvious advantages of wave sounding methods, their application is constrained by the complexity of the tasks of interpreting the results obtained and the associated errors in determining the parameters of structures; the multifactorial nature of the problems of evaluating the parameters of multicomponent materials of structures, the imperfection of flaw detection methods. Purpose of work – a review of the capabilities of modern georadars and means of processing ultra-wideband signals together with computer-oriented systems for numerical modeling, optimization of methods for processing georadar data for solving problems of detecting and identifying subsurface irregularities in building structures that are a flat-layered medium. Materials and methods. The first part of the article provides a brief overview of the main methods of processing data sets obtained using pulsed GPR. A new method of data processing using specialized software is proposed GeoVizy. The possibilities of using the methods of the modern theory of diffraction and methods of signal analysis in the space-time domain for solving the problems of flaw detection are also briefly considered. Results. The results obtained in this work are based on remote sensing data, proposed mathematical models and methods for processing sensing data. Based on the results of the comparative analysis of the capabilities of georadars, practical recommendations were proposed to improve the reliability of the data sets obtained, and possible directions for further research were substantiated. Conclusions. The results of numerical modeling and laboratory experiments obtained in this work confirmed the previously stated theoretical assumptions about the degree of influence of the key parameters of ultra-wideband GPR on the reliability of the results obtained. The significance of the new scientific results obtained consists not only in the use of new sensing means and new models of processing and subsequent interpretation of the data obtained, but also in the considered prospects for progress in the field of non-destructive testing and diagnostics.
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Kachanov, A. N., and A. N. Petrov. "Georadars in timber transport roads inspection and testing." Resources and Technology, no. 8 (2010): 74–76. http://dx.doi.org/10.15393/j2.art.2010.1770.

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Prokofiev, Ivan, Maxim Markov, Anton Purtov, Lyubov Shebalkova, and Valery Yushhenko. "INFLUENCE OF SOIL PROPERTIES ON THE RANGE OF SOUNDINGIN GEOLOCATION." Interexpo GEO-Siberia 2, no. 4 (2019): 237–45. http://dx.doi.org/10.33764/2618-981x-2019-2-4-237-245.

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Georadiolocation (subsurface radar sounding) is a geophysical method based on the emission of pulses from electromagnetic waves and the recording of signals reflected from various objects of the sounded medium. The differential properties of the soil are considered. A conclusion is drawn on the use of georadars of various types in geospatial intelligence.
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Dorofeev, N. V., A. V. Grecheneva, O. R. Kuzichkin, D. I. Surzhik, and R. V. Romanov. "The method and devices of autocompensation of phase distortions of direct digital synthesizers of signal formers of georadars." MATEC Web of Conferences 272 (2019): 01046. http://dx.doi.org/10.1051/matecconf/201927201046.

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The method for isolating the clock frequency of direct digital synthesizers, as well as algorithms and devices for isolating and automatically compensating phase distortions, that significantly improve the spectral characteristics of the formers of the probing signals of georadars used for geodynamic monitoring are considered in the article. The method is substantiated, explanatory oscillograms, spectrograms, and the results of the experimental researches, confirming the authenticity, are presented.
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Sambulov, N. I., N. B. Khakhulin, and Yu S. Netrebina. "Using Georadars for Evaluating the Thickness of a Concrete Layer." IOP Conference Series: Materials Science and Engineering 1079, no. 3 (2021): 032018. http://dx.doi.org/10.1088/1757-899x/1079/3/032018.

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Kirill Olegovich, SOKOLOV. "Development of a model of a ground-penetrating radar section of a frozen rock massif with a crack." NEWS of the Ural State Mining University, no. 2 (June 15, 2021): 134–39. http://dx.doi.org/10.21440/2307-2091-2021-2-134-139.

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Revelance of the work. The presence of cracks significantly affects the physical and mechanical properties of rocks, which should be taken into account when planning mining operations and building mining facilities. In the conditions of the spread of permafrost rocks, characteristic of northeastern Russia, the study of fracturing is possible by the GPR method, which is used to assess the structure of rock massifs in placer deposits. The criteria for detecting cracks based on the features of wave georadar fields are currently known, and the main problem that prevents the full use of the georadar method for studying cracks in subsurface layers of rocks is the labour-consuming nature of processing and interpreting data from georadar measurements. Purpose of the work – to determine the patterns of cracks occurrence in frozen rocks in GPR wave fields. Methodology of the work. Based on the results of longstanding field work at the developed areas of alluvial diamond deposits in the Anabar region of the Republic of Sakha (Yakutia), the main elements of the radarogram structure were determined and presented in the form of a single formula. The developed formula is implemented in programs in the SCM Matlab and the results of its execution are compared with the results of modeling in the gprMax system. Results of the work and the scope of their application. The resultant formula describes the main elements of GPR radarograms quite correctly, which confirmed their comparison with the obtained model data. The correlation coefficient between the obtained matrices (Matlab and gprMax) without the low-amplitude values of multiple reflections was 0.91, which shows the identity of the structure of GPR wave fields. Conclusions. The studies carried out have confirmed the possibility of a mathematical description of the ground penetrating radar wave field obtained by sounding a mass of frozen rocks with a crack. The high correlation coefficient showed the adequacy of the developed radarogram model, which will be finalized taking into account the directional diagrams of existing georadars.
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Sidorov, Igor A., Alexander G. Gudkov, Evgeny P. Novichikhin, Sergey V. Chizhikov, and Igor O. Porokhov. "Radiometric method for soil moisture portraits obtaining to study the hydrology of dams." Radioelectronics. Nanosystems. Information Technologies. 15, no. 2 (2023): 125–32. http://dx.doi.org/10.17725/rensit.2023.15.125.

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The methods for the artificial hydraulic structures condition monitoring using trace microwave radiometers are considered, in order to timely detect places of underground leaks to ensure trouble-free operation. Several practical examples of the use of microwave radiometers on various ground-based mobile carriers are described. The characteristics of microwave radiometers used in practice for hydrological monitoring of earthen dams are given. The possibility of detecting potentially dangerous sections of dams, places of erosion of the dam cover, possible places of underground leaks is shown. The possibility of combining microwave radiometers with other means of remote sensing, such as optical video cameras, thermal infrared cameras and georadars, is being considered. The advantages of multisensory sensing to increase the reliability of detecting places of underground leaks are substantiated.
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Kuzichkin, Oleg R., Dmitriy I. Surzhik, Gleb S. Vasiliev, Igor A. Kurilov, and Nikolai V. Dorofeev. "Analysis of Noise Characteristics of Multichannel Systems of the Formation of Signals of Georadars with Synthesized Aperture." Active and Passive Electronic Components 2018 (December 4, 2018): 1–7. http://dx.doi.org/10.1155/2018/9429863.

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The noise characteristics of multichannel systems of forming signals based on hybrid frequency synthesizers with automatic compensation of phase distortions of direct digital synthesizers, which are used in the composition of georadars with synthesized aperture, are investigated. It is established that the phase noise of the output signals of the formers at the 1 kHz detuning from the carrier oscillation at the output frequencies of the devices in the range from 500 to 3500 MHz is characterized by a level of minus 100 - minus 130 dB. In this case, the circuit of the signal former based on a hybrid frequency synthesizer with direct digital synthesizer as a reference oscillator of a phase locked loop is characterized by the worst noise characteristics but with the highest degree of autocompensation (about 13 dB). Conversely, the circuit of the signal former based on a hybrid frequency synthesizer with direct digital synthesizer as a support generator of the phase-locked loop has the best phase noises level from the considered variants of devices and least degree of autocompensation (about 6 dB).
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Dissertations / Theses on the topic "Georadars"

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Абрамович, А. О. "Радіолокаційно-вихрострумовий метод обробки сигналів георадарів". Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/44118.

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Відома значна кількість конструкцій металодетекторів (найпоширенішого різновиду георадарів), які мають різне призначення. Всі вони поділяються на три основні типи за принципом дії (передача- прийом, генератор биття частот, імпульсна індукція) і мають різну схемотехніку, що пояснює наявність на ринку багатьох моделей від різних фірм-виробників. Саме принципом дії визначається призначення металодетекторів: для пошуку чорних металів (наприклад, розмінування) та кольорових (археологічні, геологічні розвідки та ін.). При цьому, селекція кольорових металів (мідь, золото, срібло, тощо) ними не здійснюється і тому неможливо проводити пошук конкретного металу. Все це разом обумовило мету даної роботи.
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Parnadi, Wahyudi Widyatmoko. "Kennwert-Schätzung aus Georadar-Transmissionsdaten." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola&quot, 2009. http://nbn-resolving.de/urn:nbn:de:swb:105-5191779.

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Neben der Ausbreitungsgeschwindigkeit ist die Absorption elektromagnetischer Wellen der wichtigste Parameter für die Bearbeitung und Interpretation von Georadar-Daten. Für die realitätsnahe Beschreibung der Ausbreitung elektromagnetischer Wellen in Gesteinen eignet sich das Modell mit konstantem Q und einem Dispersionsansatz der Phasengeschwindigkeit nach Futterman (1982). Anhand von Modellrechnungen wird die Wirkung dieser Parameter auf Wavelets untersucht. Die Ermittlung des absorptionscharakterisierenden Gütefaktors Q aus GPR-Transmissionsdaten erfolgt auf der Basis einer Erweiterung der Q-Definition. Die dazu benutzte Referenzfrequenz fR ist eine Potenzfunktion von zu vergleichenden Amplitudendichten der entsprechenden Äquivalenzspektren. Die Anwendbarkeit der danach benannten Methode der Äquivalenten Bandbreite wird sowohl an synthetischen Daten als auch an Messergebnissen nachgewiesen, die an einem Sandsteinblock sowie an anstehendem Gneis erhalten worden sind. Es werden Möglichkeiten aufgezeigt, Querbeziehungen zwischen Q-Werten und petrophysikalischen Parametern herzustellen.
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Parnadi, Wahyudi W. "Kennwert-Schätzung aus Georadar-Transmissionsdaten /." [S.l. : s.n.], 2001. https://fridolin.tu-freiberg.de/archiv/html/GeowissenschaftenParnadiWahyudi%5FWidyatmoko519177.html.

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Gross, Ralf. "3-D georadar surveying of active faults /." [S.l.] : [s.n.], 2002. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=14971.

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Girard, Jean-Francois. "Imagerie georadar et modelisation des diffractions multiples." Phd thesis, Université Louis Pasteur - Strasbourg I, 2002. http://tel.archives-ouvertes.fr/tel-00135945.

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Le géoradar est une technique couramment utilisée pour prospecter le proche sous-sol. Des ondes électromagnétiques à hautes fréquences (>10 MHz) sont émises dans le sol et les échos enregistrés traduisent les contrastes de permittivité diélectrique entre les différents milieux. Cela permet d'imager les changements de lithologie, des états de fracturation différents, des variations de teneur en eau... Dans ces milieux diélectriques, l'onde perturbe les distributions de charges électriques liées et induit une polarisation qui à son tour influe sur l'onde et déforme le signal. En accord avec les mesures sur échantillons, nous utilisons une loi puissance de la susceptibilité électrique en fonction de la fréquence pour caractériser cette dispersion.<br />Avec une telle sensibilité aux différents matériaux et une résolution allant de quelques centimètres à<br />plusieurs décimètres, le traitement des données requiert la prise en compte de la forte hétérogénéité des milieux étudiés. C'est pourquoi nous avons développé un algorithme de modélisation par différences finies en domaine temporel et généralisé l'emploi d'une convolution récursive pour les milieux dispersifs. Nous avons également implémenté d'une façon originale des conditions limites de type "perfect match layer".<br />L'analyse des coefficients de réflexion nous a permis de valider l'hypothèse qu'une faible variation de<br />la teneur en eau pouvait expliquer la présence des réflecteurs à l'intérieur d'une dune de sable. Nous avons aussi exploité le contenu fréquentiel des signaux en calculant les rapports spectraux entre des signaux réfléchis à différents offsets pour estimer la permittivité diélectrique. Ces valeurs des paramètres et la prise en compte des variations de la teneur en eau servent ensuite à modéliser des situations réalistes.<br />En dernier lieu, nous avons utilisé avec succès le même code de différences finies, en renversant le temps, pour rétro-propager le champ enregistré.
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Jesus, Thales Eduardo Silva de. "Imageamento digital de paleocavernas colapsadas com georadar." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18821.

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Made available in DSpace on 2015-03-13T17:08:32Z (GMT). No. of bitstreams: 1 ThalesESJ_DISSERT.pdf: 669387 bytes, checksum: 33a20d208304804215535ed96770330f (MD5) Previous issue date: 2012-04-27<br>In this study, the methodological procedures involved in digital imaging of collapsed paleocaves in tufa using GPR are presented. These carbonate deposits occur in the Quixer? region, Cear? State (NE Brazil), on the western border of the Potiguar Basin. Collapsed paleocaves are exposed along a state road, which were selected to this study. We chose a portion of the called Quixer? outcrop for making a photomosaic and caring out a GPR test section to compare and parameterize the karst geometries on the geophysical line. The results were satisfactory and led to the adoption of criteria for the interpretation of others GPR sections acquired in the region of the Quixer? outcrop. Two grids of GPR lines were acquired; the first one was wider and more spaced and guided the location of the second grid, denser and located in the southern part of the outcrop. The radargrams of the second grid reveal satisfactorily the collapsed paleocaves geometries. For each grid has been developed a digital solid model of the Quixer? outcrop. The first model allows the recognition of the general distribution and location of collapsed paleocaves in tufa deposits, while the second more detailed digital model provides not only the 3D individualization of the major paleocaves, but also the estimation of their respective volumes. The digital solid models are presented here as a new frontier in the study of analog outcrops to reservoirs (for groundwater and hydrocarbon), in which the volumetric parameterization and characterization of geological bodies become essential for composing the databases, which together with petrophysical properties information, are used in more realistic computer simulations for sedimentary reservoirs.<br>Nesse trabalho s?o apresentados os procedimentos metodol?gicos envolvidos no imageamento digital de paleocavernas colapsadas em tufas carbon?ticas que ocorrem na borda oeste da Bacia Potiguar com GPR. Foi mapeada uma ?rea em Quixer? (CE) e selecionado um afloramento em um corte de estrada, denominado de Afloramento Quixer?. Foi escolhida uma por??o deste afloramento para confec??o de um fotomosaico e levantamento de uma se??o-teste com o GPR para a compara??o e parametriza??o das geometrias c?rsticas aflorantes e imageadas na linha geof?sica. Os resultados foram satisfat?rios e permitiram a ado??o de crit?rios para a interpreta??o das paleocavernas colapsadas em outras se??es GPR, levantadas na regi?o do afloramento. Foram adquiridas duas malhas de linhas GPR, a primeira mais ampla e espa?ada norteou a loca??o da segunda, mais adensada, na por??o sul do Afloramento Quixer?. Nos radargramas foram interpretadas e parametrizadas as geometrias das principais paleocavernas colapsadas. Para cada malha foi elaborado um modelo de s?lido digital do Afloramento Quixer?, sendo que o primeiro modelo permitiu o reconhecimento da distribui??o geral das tufas e a localiza??o das paleocavernas colapsadas, enquanto o segundo modelo digital, por ser mais detalhado, possibilitou n?o apenas a individualiza??o 3D das principais paleocavernas, mas tamb?m o c?lculo dos seus respectivos volumes. Os modelos de s?lidos digitais s?o aqui apresentados como uma nova fronteira no estudo de afloramentos an?logos a reservat?rios (h?dricos ou petrol?feros), na qual a parametriza??o e a caracteriza??o volum?trica dos corpos geol?gicos passam a ser fundamental para compor bancos de dados, que conjuntamente com informa??es de propriedades petrof?sicas s?o utilizados em simula??es computacionais mais real?sticas de reservat?rios.
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Messinger, Jens. "Optimierte Auswertestrategien zur Kennwertermittlung mittels Georadar-Tomographie." Berlin mbv, Mensch-und-Buch-Verl, 2008. http://d-nb.info/998082473/04.

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Costa, André João de Vilhena. "Utilização do georadar na caracterização de pavimentos rodoviários." Master's thesis, Departamento de Engenharia Civil, 2009. http://hdl.handle.net/10316/15693.

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Franco, Dulce Alexandra Lourenço. "Avaliação das potencialidades do georadar em engenharia civil." Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/3648.

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Mestrado em Engenharia Civil<br>Esta dissertação incide sobre a aplicação de uma técnica geofísica não destrutiva, designadamente o Ground Penetrating Radar (GPR), também denominado por georadar. Na componente prática deste trabalho são apresentados exemplos de aplicações utilizados para estudar as potencialidades do equipamento de georadar existente no Instituto Politécnico de Tomar. O GPR foi utilizado em dois solos, em pavimentos betuminosos, em duas paredes, em duas lajes de betão armado e numa ponte de alvenaria de pedra. Os resultados obtidos na aplicação do GPR em solos mostram que este equipamento é adequado para detectar a camada superficial de aterro. Em pavimentos betuminosos o georadar foi apropriado para descobrir a interface entre algumas camadas. Quando utilizado em paredes este equipamento permitiu identificar vazios, objectos no seu interior, detectar as armaduras, determinar o seu espaçamento e verificar o seu alinhamento. Na utilização em lajes de betão armado o GPR foi adequado para detectar as armaduras, determinar o seu espaçamento e verificar o seu alinhamento. No ensaio efectuado na ponte de alvenaria de pedra, o georadar permitiu determinar a espessura do lajedo, confirmar o centro do extradorso da aduela de fecho dos arcos (medidas na escala horizontal) e identificar algumas zonas com presença de humidade. O equipamento utilizado para aquisição dos dados foi o RAMAC/GPR da MALÅ Geoscience com as antenas blindadas de 250 MHz, 500 MHz, 800 MHz e 1600 MHz, em modo mono-estático. Os radargramas obtidos foram processados com o software RAMAC GroundVision do Instituto Politécnico de Tomar. O trabalho desenvolvido permitiu um acumular de conhecimento acerca deste equipamento e assim garantir a sua eficácia num conjunto alargado de aplicações práticas.<br>This thesis focuses on the use of a non-destructive geophysical technique - the Ground Penetrating Radar (GPR) - also known as georadar. The practical section of this work presents examples of the applications used to study the potential of a GPR equipment owned by the Polytechnic Institute of Tomar (IPT). The GPR has been used to test two kinds of soils, bituminous pavements, two walls, two reinforced concrete slabs and one stone masonry bridge. The results of the utilization of GPR in soils show that this equipment is appropriate for detecting the surface layer of the embankment. In roads the GPR was appropriate to find an interface between some strata. When applied to walls, the equipment enabled to identify some voids, objects in the interior of the walls, to detect reinforcing bars and to determine its spacing and check its alignment. When used with reinforced concrete slabs, the GPR appears to be suited to detect reinforcing bars, to determine its spacing and check its alignment. As for experiments with the stone masonry bridge, the georadar allowed to determine the thickness of slabs, confirm the centre of the suction face of the arch voussoir (scaled horizontally) and identify any damp areas. The equipment used for data collection was RAMAC/GPR of MALÅ GEOSCIENCE with 250 MHz, 500 MHz, 800 MHz and 1600 MHz shielded antennas in monostatic mode. The obtained radargrams have been processed with the software RAMAC GroundVision of the Polytechnic Institute of Tomar. The work developed enabled to have a better knowledge about this equipment and thus ensure its efficiency in a wide range of practical applications.
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Bentley, Andrew Phillip Keller. "Characterizing Subsurface Complexity of Aeolian Morphotypes with Georadar." Master's thesis, Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/226136.

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Geology<br>M.S.<br>Aeolian landforms are classified based on their plan morphology, which is a function of sediment transport volume, wind direction, and vegetation. In the case of compound landforms or two-dimensional exposures (outcrops), there is insufficient information for discriminating between 3D morphotypes (e.g., barchans vs. parabolic dunes). To characterize the dip-section architecture of near end-member morphologies (interacting barchans and sparsely vegetated parabolics), a series of axial transects were selected from >25 km of high-resolution (500 MHz) ground-penetrating radar (GPR) data from the gypsum dune field of White Sands National Monument, New Mexico. For dunes of comparable size (6-7 m high), a series of attributes were analyzed for unsaturated portions along the thickest (axial) radargram sections. Given the limitations in vertical resolution (7 cm in dry sand), the average measureable slipface thickness in barchans ranged between 10-22 cm, whereas parabolic slipfaces were thinner at 10-14 cm. High-amplitude diffractions produced by buried vegetation, semi-lithified pedestals, and bioturbation structures were rare within barchans (point-source diffraction density = 0.03/m2; hyperbolics per 1-m-wide cross-sectional area of the image), in contrast to a point-source density of 0.07/m2 in parabolics. An aeolian internal complexity threshold (&#982;) is proposed, which incorporates standardized scores of slipface thickness, point-source diffraction density, and continuity of major bounding surfaces at mesoscale range determined through semivariogram analysis. For the study region, these variables were sufficient for discriminating barchans (&#982; = -2.39 to -0.25; &#982; &#773;b= -1.65) from parabolic (&#982; = 0.13 to 2.87; &#982; &#773;p= 1.65) dunes. This threshold has the potential for differentiating dune morphotypes in areas where surface morphology is masked and for identifying compound landforms (e.g., a re-activated parabolic dune converted into a barchan in situ). Ultimately, characterization of bedding complexity in ancient aeolian sequences will provide useful information about key paleoenvironmental variables.<br>Temple University--Theses
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Books on the topic "Georadars"

1

Conyers, Lawrence. Georadar Aplicado en Geotecnia y Arqueología. Primedia eLaunch LLC, 2021.

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Gross, Ralf. 3-D georadar surveying of active faults. 2002.

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Indagini georadar sul basamento del David di Michelangelo. La scuola di Pitagora, 2010.

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Zürich, Eidgenössische Technische Hochschule, ed. Automation in 3D georadar investigations: New acquisition and processing techniques. 1999.

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Electromagnetic Methods in Geophysics: Applications in GeoRadar, FDEM, TDEM, and AEM. Wiley & Sons, Limited, John, 2022.

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Leucci, Giovanni, and Fabio Giannino. Electromagnetic Methods in Geophysics: Applications in GeoRadar, FDEM, TDEM, and AEM. Wiley & Sons, Incorporated, John, 2021.

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Leucci, Giovanni, and Fabio Giannino. Electromagnetic Methods in Geophysics: Applications in GeoRadar, FDEM, TDEM, and AEM. Wiley & Sons, Incorporated, John, 2021.

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Leucci, Giovanni, and Fabio Giannino. Electromagnetic Methods in Geophysics: Applications in GeoRadar, FDEM, TDEM, and AEM. Wiley & Sons, Incorporated, John, 2021.

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Serra, Mario, and Stefania D'Agostino, eds. Archeologia Preventiva. Manuale per gli operatori. Agenzia Magna Graecia, 2010.

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Zürich, Eidgenössische Technische Hochschule, ed. Three-dimensional georadar imaging: Quaternary sediments in the Rhine and Rhone River valleys, Switzerland. 1998.

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Book chapters on the topic "Georadars"

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Vilhjalmsson, R., and R. Feld. "Einsatz des Georadars im Ingenieurbau." In Laser/Optoelektronik in der Technik / Laser/Optoelectronics in Engineering. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-48372-1_197.

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Faize, Ahmed, and Gamil Alsharahi. "Preliminary Study of Roots by Georadar System." In Embedded Systems and Artificial Intelligence. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0947-6_17.

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Frid, Alan, and Vladimir Frid. "Features of a Large-Scale Survey of Highways with Georadar." In Lecture Notes in Civil Engineering. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77234-5_70.

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Buynevich, Ilya V., Albertas Bitinas, and Donatas Pupienis. "Aeolian Sand Invasion: Georadar Signatures from the Curonian Spit Dunes, Lithuania." In Sand and Gravel Spits. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13716-2_5.

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"Georadar." In Encyclopedic Dictionary of Archaeology. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58292-0_70111.

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"Georadar n." In Wörterbuch GeoTechnik/Dictionary Geotechnical Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33335-4_71324.

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Dias, Gustavo Nogueira, Lucia Maria Costa e. Silva, and Vanessa Mayara Souza Pamplona. "EXPLORAÇÃO DA EROSÃO FLUVIAL POR MEIO DO GEORADAR." In Ciência ambiental: avanços tecnológicos, perspectivas sociais e os problemas causados pela intervenção humana. Atena Editora, 2023. http://dx.doi.org/10.22533/at.ed.4312302056.

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Kubišta, Richard. "Georadar research of parterre in historic park in Palarikovo." In Plants in Urban Areas and Landscape. Slovak University of Agriculture in Nitra, 2014. http://dx.doi.org/10.15414/2014.9788055212623.159-163.

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Tončinić, Domagoj, and Branko Mušič. "Geofizička istraživanja primjenom georadara na području rimskog legijskog logora Tilurija." In TILURIUM V. Arheološka istraživanja 2010. - 2018. godine. Filozofski fakultet Sveučilišta u Zagrebu - FF Press, 2021. http://dx.doi.org/10.17234/9789531757867.8.

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Mušič, Branko, and Domagoj Tončinić. "Geofizička istraživanja primjenom georadara na području rimskog legijskog logora Tilurija." In TILURIUM V. Arheološka istraživanja 2010. - 2018. godine. Filozofski fakultet Sveučilišta u Zagrebu - FF Press, 2021. http://dx.doi.org/10.17234/9789533790336.8.

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Conference papers on the topic "Georadars"

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Melchiori, Ana Paula Piovesan, José Roberto Soares Scolforo, Ricardo Terra, et al. "GeoRadar: Inovação na Investigação pelo Ministério Público Federal com Dados Geolocalizados." In Anais Estendidos do Simpósio Brasileiro de Sistemas de Informação. Sociedade Brasileira de Computação (SBC), 2023. http://dx.doi.org/10.5753/sbsi_estendido.2023.229396.

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Este artigo apresenta a inovação no âmbito do Ministério Público Federal com o Georadar, um sistema de informação com dados geolocalizados utilizado pela Secretaria de Perícia, Pesquisa e Análise para investigação com cruzamento de dados e geração de relatórios para procedimentos judiciais e extrajudiciais. O Georadar foi desenvolvido em parceria com a Universidade Federal de Lavras, com a disponibilização de sistema com mapas interativos com cruzamento de dados de diversas bases de dados, e já tem impacto em investigações de grande relevância, como identificação de áreas com invasão de terra e garimpo ilegal na Amazônia.
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A. van Overmeeren, R. "Georadar for hydrogeology." In 55th EAEG Meeting. European Association of Geoscientists & Engineers, 1993. http://dx.doi.org/10.3997/2214-4609.201411534.

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Saracin, Aurel. "GEORADAR TECHNIQUE AND MICROTUNNELLING." In 16th International Multidisciplinary Scientific GeoConference SGEM2016. Stef92 Technology, 2016. http://dx.doi.org/10.5593/sgem2016/b22/s09.043.

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Fokkema, Jacob, Emile Fokkema, Sicco Beekman, and Evert Slob. "Analysis Of Georadar Reflection Responses." In 7th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 2001. http://dx.doi.org/10.3997/2214-4609-pdb.217.017.

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Lehmann, Frank, David Boerner, Klaus Holliger, and Alan G. Green. "Vectorial nature of georadar data." In 8th International Conference on Ground Penetrating Radar, edited by David A. Noon, Glen F. Stickley, and Dennis Longstaff. SPIE, 2000. http://dx.doi.org/10.1117/12.383523.

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Lehmann, Frank, and Alan G. Green. "Topographic migration of georadar data." In 8th International Conference on Ground Penetrating Radar, edited by David A. Noon, Glen F. Stickley, and Dennis Longstaff. SPIE, 2000. http://dx.doi.org/10.1117/12.383556.

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Lehmann, Frank, Michiel van der Veen, Peter Wild, Heinrich Horstmeyer, and Alan Green. "Automated three‐dimensional georadar acquisition." In SEG Technical Program Expanded Abstracts 1997. Society of Exploration Geophysicists, 1997. http://dx.doi.org/10.1190/1.1886119.

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Ciszkowski, V., P. Curcaneanu, E. Oltean, L. Bogateanu, G. Ticu, and M. Ciuperceanu. "Georadar Method To Monitor Railway Infrastructure." In 4th Congress of the Balkan Geophysical Society. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.26.p2-07.

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Pereira Lopes, Elizeu, Luiz Muniz Barreto, and Jorge Muniz Barreto. "Neural Georadar Probing of Stratified Media." In 5th International Congress of the Brazilian Geophysical Society. European Association of Geoscientists & Engineers, 1997. http://dx.doi.org/10.3997/2214-4609-pdb.299.162.

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Tešić, Ksenija, Ana Baričević, and Marijana Serdar. "Primjena georadara u ocjeni stanja betonskih konstrukcija." In 6th Symposium on Doctoral Studies in Civil Engineering. University of Zagreb Faculty of Civil Engineering, 2019. http://dx.doi.org/10.5592/co/phdsym.2020.16.

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