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| Titel |
A novel discontinuous Galerkin time-domain method for ground-penetrating radar simulation with applications to the ASSESS-GPR test site |
| VerfasserIn |
J. Fahlke, J. Büchner, O. Ippisch, K. Roth, P. Bastian |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250068879
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| Zusammenfassung |
| The simulation of ground-penetrating radar (GPR) measurements requires the solution of
Maxwell’s equations. While finite-differences time-domain (FDTD) solvers are faster on
structured grids, finite-element time-domain (FETD) and discontinuous Galerkin
time-domain (DGTD) allow to resolve complicated structures and avoid staircase
approximations. Soil horizon boundaries can be resolved exactly by the finite element
mesh.
In this contribution 3D simulations are compared with measurements from the
ASSESS-GPR test site which is an artificial GPR testbed with a well known geometry and
ground-truth on volumetric water content provided by 32Â TDR probes.
For the simulations a DGTD method is used in a dual-field formulation and compared to a
standard FETD method with conforming edge-based finite elements. The software for
the simulation has been developed using the Distributed and Unified Numerics
Environment (DUNE) and its PDELab discretization module. The programs have
been parallelized using MPI to make computations on the size of 108 unknowns
feasible. |
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