Optimization of acquisition setup for cross-hole GPR full-waveform inversion using checkerboard analysis

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Title:Main Title: Optimization of acquisition setup for cross-hole GPR full-waveform inversion using checkerboard analysis
Description:Abstract: Tomographic inversions of cross-hole ground-penetrating radar provide images of electromagnetic properties of the shallow subsurface and are used in a wide range of applications. Whereas the resolutions of ray-based methods like first-arrival traveltime and first-cycle amplitude tomography are limited to the scale of the first Fresnel zone, full-waveform inversions incorporate precise forward modelling using the full recorded signal for a solution of Maxwell’s equation, which results in sub-wavelength resolutions. In practice, the method can be time-consuming in data acquisition and expensive in computational costs. To overcome these expenses, a semi-reciprocal acquisition setup with a reduced number of transmitters and an interchange of transmitter and receiver boreholes instead of a one-sided equidistant setup in either borehole yielded promising results. Here, this optimized, semi-reciprocal acquisition setup is compared to a dense, equidistant, one-sided acquisition setup measured at the field site Krauthausen, Germany. The full-waveform inversion results are evaluated using the checkerboard test as a capable resolution analysis tool to determine resolvabilities. We introduced also a new method of time-zero correction by a cross-correlation of a zerooffset profile with corresponding horizontal traces of each multi-offset gather. The obtained experimental results from Krauthausen combined with the checkerboard analysis indicate the main threepermittivity layers that correspond with different porosities. Also fine-layered structures within these main layers were reliably imaged. We conclude that the use of the semi-reciprocal setup is optimum for acquisition speed, inversion speed and obtained permittivity inversion results. Our results indicate that conductivity results are better for denser transmitter-receiver setups.
Identifier:10.3997/1873-0604.2012045 (DOI)
Responsible Party
Creators:Max Oberröhrmann (Author), Anja Klotzsche (Author), Harry Vereecken (Author), Jan van der Kruk (Author)
Publisher:European Association of Geoscientists & Engineers
Publication Year:2013
Topic
TR32 Topic:Remote Sensing
Related Subproject:B6
Subjects:Keywords: GPR, Full-Waveform
File Details
Filename:2013_Oberroehrmann_NSG_Metadata
Data Type:Text - Article
Size:13 Pages
File Size:Unknown
Date:Issued: 01.04.2013
Mime Type:Unknown
Language:English
Status:Completed
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Download Permission:Only Project Members
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:[TR32DB] Data policy agreement
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Specific Information - Publication
Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Near Surface Geophysics
Source Website:www.nsg.eage.org
Issue:2
Volume:11
Number of Pages:13 (197 - 209)
Metadata Details
Metadata Creator:Max Oberröhrmann
Metadata Created:09.12.2013
Metadata Last Updated:09.12.2013
Subproject:B6
Funding Phase:2
Metadata Language:English
Metadata Version:V50
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