Finite-difference modeling of ground-penetrating radar data: The zero-offset approximation

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Serval ID
serval:BIB_AD3C40C20F24
Type
Inproceedings: an article in a conference proceedings.
Collection
Publications
Title
Finite-difference modeling of ground-penetrating radar data: The zero-offset approximation
Title of the conference
EEGS - European section 3rd meeting, Aarhus, Denmark
Author(s)
Bergmann T., Holliger K., Leckebusch J.
Publication state
Published
Issued date
1997
Pages
63-66
Language
english
Abstract
Most ground-penetrating radar suveys are acquired in quasi zero-offset
mode, Le. source-receiver offsets are small compared to the target
depth. The correct way to realistically model such an experiment
would be to compute a corresponding sequence of common-offset radargrarns.
In finite-difference time domain (FDTD) modeling this approach would
be excessively expensive and hence is substituted by initiating a
downward travelling plane wave at the earth's surface. However, this
method of zero-offset modeling is only realistic for horizontafly
layered, one-dimensional media, and thus is unsatisfactory in most
realistic situations and defeats the very purpose of finite-difference
rnodeling. Therefore, we propose an alternative approach based on
the "exploding reflector" concept. This approximation is more realistic,
even in highly complex media, and is only marginaily more expensive
than the plane wave method.
Create date
25/11/2013 18:27
Last modification date
20/08/2019 15:17
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