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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:04 |
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Conference: Bucharest University Faculty of Physics 2016 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Error evaluation for GPR investigations in different electromagnetic characteristicslayered media
Authors:
A. CHELMUS, R. RADVAN
Affiliation:
National Institute for Research and Development in Optoelectronics-INOE 2000, Atomistilor str. no.409, Magurele city, Ilfov County, Romania
E-mail
alexandru.chelmus@inoe.ro,radvan@inoe.ro
Keywords:
multilayered media, reflection coefficient, archaeology, radar
Abstract:
Out of the investigation techniques applied in archeology and cultural heritage, GPR is widely known as the most effective due to the possibility of identifying objects with a high accuracy regardless of their nature.Influence of technical parameters and electromagnetic characteristics of the propagation medium on the radio wavesis well known.Usuallyin investigations thepropagation medium is the soil, which is made from layers of different thickness andelectromagnetic characteristics.In terms of geophysical investigations layers thickness is divided in twocategories depending on the vertical resolution of GPR, thick and thin layers.In this paper is analyzed theoretical and by numerical simulations the influence of mediums composed of thick layers on EMradiation.In the case of propagation medium made up of more than two layers the transmitted signal calculation method changes, because it must be taken into account the phenomena that occur at every material border respectively transmission and reflection of the signal back and forth.The difference in relative dielectric permittivity of the layers leads to the reflection of a part of radiation due to reflection coefficient, which affects the penetration depth of the method. Analyzing the effects of multilayered media on GPR investigations has an import role in understanding the radiation propagation and for data interpretation.
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