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Ground radar simulation for archaeological applications Normal access

Author: José M. Carcione
Journal name: Geophysical Prospecting
Issue: Vol 44, No 5, September 1996 pp. 871 - 888
DOI: 10.1111/j.1365-2478.1996.tb00178.x
Organisations: Wiley
Language: English
Info: Article, PDF ( 1.76Mb )

Summary:
This work presents a new modelling scheme for the simulation of electromagnetic radio waves, based on a full-field simulator. Maxwell's equations are modified in order to include dielectric attenuation processes, such as bound- and free-water relaxation, ice relaxation and the Maxwell–Wagner effect. The new equations are obtained by assuming a permittivity relaxation function represented by a generalized Zener model. The convolution integral introduced by the relaxation formulation is circumvented by defining new hidden field variables, each corresponding to a different dielectric relaxation. The equations are solved numerically by using the Fourier pseudospectral operator for computing the spatial derivatives and a new time-splitting integration algorithm that circumvents the stiffness of the differential equations. The program is used to evaluate the georadar electromagnetic response of a Japanese burial site, in particular, a stone coffin-like structure.


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