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Ground radar simulation for archaeological applications 1
Author(s) -
Carcione José M.
Publication year - 1996
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1996.tb00178.x
Subject(s) - relaxation (psychology) , convolution (computer science) , electromagnetic field , radar , maxwell's equations , field (mathematics) , attenuation , physics , computational physics , geology , mathematical analysis , computer science , classical mechanics , optics , mathematics , telecommunications , psychology , social psychology , quantum mechanics , machine learning , artificial neural network , pure mathematics
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.