Evaluation of the reconstruction limits of a frequency-independent crosshole georadar waveform inversion scheme in the presence of dispersion

Détails

ID Serval
serval:BIB_06CFC79D20C7
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evaluation of the reconstruction limits of a frequency-independent crosshole georadar waveform inversion scheme in the presence of dispersion
Périodique
Journal of Applied Geophysics
Auteur(s)
Belina F., Irving J., Holliger K.
ISSN-L
0926-9851
Statut éditorial
Publié
Date de publication
2012
Peer-reviewed
Oui
Volume
78
Pages
9-19
Langue
anglais
Notes
Belina2012b
Résumé
Waveform tomographic imaging of crosshole georadar data is a powerful
method to investigate the shallow subsurface because of its ability
to provide images of pertinent petrophysical parameters with extremely
high spatial resolution. All current crosshole georadar waveform
inversion strategies are based on the assumption of frequency-independent
electromagnetic constitutive parameters. However, in reality, these
parameters are known to be frequency-dependent and complex and thus
recorded georadar data may show significant dispersive behavior.
In this paper, we evaluate synthetically the reconstruction limits
of a recently published crosshole georadar waveform inversion scheme
in the presence of varying degrees of dielectric dispersion. Our
results indicate that, when combined with a source wavelet estimation
procedure that provides a means of partially accounting for the frequency-dependent
effects through an "effective" wavelet, the inversion algorithm performs
remarkably well in weakly to moderately dispersive environments and
has the ability to provide adequate tomographic reconstructions.
Mots-clé
Waveform inversion, Crosshole GPR, Frequency-dependent permittivity, , Constant Q, FDTD
Création de la notice
25/11/2013 17:31
Dernière modification de la notice
20/08/2019 12:29
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