NDLI: Combined effective wavelet estimation and full-waveform inversion of GPR data

Content Provider	IEEE Xplore Digital Library
Author	Busch, S. van der Kruk, J. Bikowski, J. Vereecken, H.
Copyright Year	2011
Description	Author affiliation: Research Center Jülich, Institute of Bio- and Geosciences, Agrosphere IBG-3, Germany (Busch, S.; van der Kruk, J.; Bikowski, J.; Vereecken, H.)
Abstract	Full-waveform inversion uses all information content of the measured data, which leads to higher resolution images compared to standard ray-based techniques. We developed a full-waveform inversion scheme for common-midpoint (CMP) GPR data that is based on a frequency domain solution of Maxwell's equations assuming a layered model of the subsurface. The full-waveform inversion requires a good start model of the subsurface medium parameters; permittivity and conductivity, which mainly influence the velocity and amplitudes, respectively. Traveltime inversion usually returns start values for the relative permittivity. However, reliable conductivity values are difficult to obtain. Erroneous conductivity values result in wrong amplitudes of the effective source wavelet that is needed for the full-waveform inversion, which in turn also results in erroneously inverted conductivity values, since the conductivity and wavelet amplitudes are coupled. To assure a good start model and an accurate estimation of the unknown source wavelet, we implemented a joint optimization of the effective source wavelet and the medium parameters using a combined global and local search algorithm. The full-waveform inversion was successfully applied to dispersive synthetic and experimental CMP datasets reflecting a single-layer low-velocity waveguide.
Starting Page	1
Ending Page	5
File Size	511286
Page Count	5
File Format	PDF
ISBN	9781457703324
DOI	10.1109/IWAGPR.2011.5963885
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ground penetrating radar Dispersion Conductivity Permittivity Optimization Frequency domain analysis Data models simplex search algorithm dispersion effective wavelet estimation deconvolution
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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