Results 211 to 220 of about 11,470 (264)

Complex impedance mapping using GPR survey methods

IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004
GPR surveys are normally processed to provide reflection images free of static offsets and long period drift. However in many surveys the raw data is observed to contain systematic decays consistent with Cole-Cole models of complex impedance. The resulting time-constants can be used to provide additional constraints for geotechnical investigations of ...
J. Cull, D. Massie, J. Roberts
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GPR Methods for Hydrogeological Studies

2005
Use of ground-penetrating radar (GPR) for geologic applications grew considerably in the 1970s. In recent years, use of GPR has increased in hydrogeological investigations, since the presence or absence of water dominates GPR responses.
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Derivative seismic processing method for GPR data

IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development, 2002
Ground-penetrating radar (GPR) is a newly developed geophysics method. It belongs to one of the electromagnetic methods. In a broad sense, it is also a remote sensing technique, but the processing method for GPR data is quite different with the one for remote sensing data.
null Yu Haizhong, null Ying Xiaojian
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Evaluation of EMD-based Methods on GPR Data

Proceedings, 2014
Empirical Mode Decomposition (EMD) is a relatively new technique for analysing non-linear and non-stationary time series. Ensemble Empirical Mode Decomposition (EEMD) and Complete Ensemble Empirical Mode Decomposition (CEEMD) are noise assisted and adaptive methods based on EMD.
M. Manataki, A. Vafidis, A. Sarris
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Investigation of Concrete Internal Structures With GPR Method

Proceedings, 2017
Summary In this study, during the maintenance of part at the basement of the Department of Geophysical Engineering of the Technical University of Karadeniz, during the maintenance of, It is aimed to investigate by means of the Ground Radar (GPR) method to shows that the damaged reinforcing bar observed in the ceiling continue in the structure. For this,
A. Seren, I. Saricicek
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An Improved EMD Analysis Method for GPR Images

2011 International Conference on Computational and Information Sciences, 2011
The EMD method can be adopted to analyze the GPR echo image because it is adaptive for non-stationary and non-linear signals. However, the direct wave in GPR signal contains considerable energy which will generate false object, even aggravate the end effect.
Lu Gan, Long Zhou, Xinge You
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GPR Acquisition Methods Comparison

2023 16th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS), 2023
Dušan Gleich, Marko Vovk, Primož Smogavec, Venceslav Kafedziski, Nebojša Dončov   +4 more
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An Efficient Sampling Method for Cross-Borehole GPR Imaging

IEEE Geoscience and Remote Sensing Letters, 2018
This letter reformulates the recently proposed qualitative imaging technique, which is the near-field orthogonality sampling method (NOSM), for 2-D cross-borehole ground penetrating radar (GPR) applications. The NOSM employs the reduced scattered electric field as its indicator function. To derive a relationship between the scattered electric field and
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Symmetry filtering method for GPR clutter reduction

2008 International Conference on Microwave and Millimeter Wave Technology, 2008
The clutter reduction is one of the most important problems in the ground penetrating radar (GPR) applications. The detection performance of GPR is heavily limited by clutters. In this paper, a novel and simple clutter reduction method based on the design of a symmetry filter, which is adapted to B-scan, is presented. Compared with average subtraction,
null Li Ting-jun, null Kong Ling-jiang, null Zhou Zheng-ou   +2 more
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GPR modelling by the Fourier method: improvement of the algorithm

Geophysical Prospecting, 1999
We improve two aspects of the modelling scheme for the simulation of electromagnetic radio waves, based on the Fourier pseudospectral method.When there are large contrasts in the material properties, use of the standard algorithm (regular grid) causes a series of artefacts, as, for instance, ringing and acausal events.
null Carcione, null Lenzi, null Valle
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