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Evidence of attenuation and interference phenomena in GPR signals for archaeological application

Barone, Ilaria ; Rossi, Matteo LU ; Deiana, Rita and Mazzariol, Alessandro (2021) 11th International Workshop on Advanced Ground Penetrating Radar, IWAGPR 2021
Abstract

We conducted an extensive geophysical field campaign using ground-penetrating radar (GPR) and electrical resistivity tomography (ERT) in a former military area at the archaeological site of Nora (South-Western Sardinia). The purpose was to identify a Phoenician, and then Punic and Roman, necropolis of considerable interest, subject of a long-term investigation and currently under excavation. In the same area other buried structures, including a Roman road, were also investigated. The ERT and GPR surveys (the latter conducted with two different frequencies - 200 and 600 MHz), carried out in a sector where the Roman road was known to exist, did not reveal any clear evidence of the presence of this structure. However, the road was then... (More)

We conducted an extensive geophysical field campaign using ground-penetrating radar (GPR) and electrical resistivity tomography (ERT) in a former military area at the archaeological site of Nora (South-Western Sardinia). The purpose was to identify a Phoenician, and then Punic and Roman, necropolis of considerable interest, subject of a long-term investigation and currently under excavation. In the same area other buried structures, including a Roman road, were also investigated. The ERT and GPR surveys (the latter conducted with two different frequencies - 200 and 600 MHz), carried out in a sector where the Roman road was known to exist, did not reveal any clear evidence of the presence of this structure. However, the road was then found, by direct excavation, at 0.5 m depth. The failure in the identification of the road at this shallow depth has therefore led to hypothesize possible phenomena of high GPR signal attenuation and/or destructive interference related to the geometry and specific characteristics of the system. We performed synthetic GPR modeling by using the information provided by the excavation and constrained, in terms of electrical conductivity, by ERT measurements. The preliminary results of this simulation confirm the hypothesis of interference and attenuation phenomena, suggesting how the GPR signal may fail to provide an apparently simple piece of information at this archaeological site.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
ERT, GPR, Roman road, synthetic model, wave interference
host publication
11th International Workshop on Advanced Ground Penetrating Radar, IWAGPR 2021
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
conference name
11th International Workshop on Advanced Ground Penetrating Radar, IWAGPR 2021
conference location
Valletta, Malta
conference dates
2021-12-01 - 2021-12-04
external identifiers
  • scopus:85136256035
ISBN
9781665422536
DOI
10.1109/IWAGPR50767.2021.9843180
language
English
LU publication?
yes
id
5b4569b6-271a-43f8-8385-026d5f37d241
date added to LUP
2022-09-09 15:21:20
date last changed
2022-09-09 15:21:20
@inproceedings{5b4569b6-271a-43f8-8385-026d5f37d241,
  abstract     = {{<p>We conducted an extensive geophysical field campaign using ground-penetrating radar (GPR) and electrical resistivity tomography (ERT) in a former military area at the archaeological site of Nora (South-Western Sardinia). The purpose was to identify a Phoenician, and then Punic and Roman, necropolis of considerable interest, subject of a long-term investigation and currently under excavation. In the same area other buried structures, including a Roman road, were also investigated. The ERT and GPR surveys (the latter conducted with two different frequencies - 200 and 600 MHz), carried out in a sector where the Roman road was known to exist, did not reveal any clear evidence of the presence of this structure. However, the road was then found, by direct excavation, at 0.5 m depth. The failure in the identification of the road at this shallow depth has therefore led to hypothesize possible phenomena of high GPR signal attenuation and/or destructive interference related to the geometry and specific characteristics of the system. We performed synthetic GPR modeling by using the information provided by the excavation and constrained, in terms of electrical conductivity, by ERT measurements. The preliminary results of this simulation confirm the hypothesis of interference and attenuation phenomena, suggesting how the GPR signal may fail to provide an apparently simple piece of information at this archaeological site. </p>}},
  author       = {{Barone, Ilaria and Rossi, Matteo and Deiana, Rita and Mazzariol, Alessandro}},
  booktitle    = {{11th International Workshop on Advanced Ground Penetrating Radar, IWAGPR 2021}},
  isbn         = {{9781665422536}},
  keywords     = {{ERT; GPR; Roman road; synthetic model; wave interference}},
  language     = {{eng}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  title        = {{Evidence of attenuation and interference phenomena in GPR signals for archaeological application}},
  url          = {{http://dx.doi.org/10.1109/IWAGPR50767.2021.9843180}},
  doi          = {{10.1109/IWAGPR50767.2021.9843180}},
  year         = {{2021}},
}