Comparing detection and location performance of perpendicular and parallel broadside GPR antenna orientations


Autoria(s): PORSANI, Jorge Luis; SLOB, Evert; LIMA, Robson S.; LEITE, David Nakamura
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

19/10/2012

19/10/2012

2010

Resumo

GPR (Ground Penetrating Radar) results are shown for perpendicular broadside and parallel broadside antenna orientations. Performance in detection and localization of concrete tubes and steel tanks is compared as a function of acquisition configuration. The comparison is done using 100 MHz and 200 MHz center frequency antennas. All tubes and tanks are buried at the geophysical test site of IAG/USP in Sao Paulo city, Brazil. The results show that the long steel pipe with a 38-mm diameter was well detected with the perpendicular broadside configuration. The concrete tubes were better detected with the parallel broadside configuration, clearly showing hyperbolic diffraction events from all targets up to 2-m depth. Steel tanks were detected with the two configurations. However, the parallel broadside configuration was generated to a much lesser extent an apparent hyperbolic reflection corresponding to constructive interference of diffraction hyperbolas of adjacent targets placed at the same depth. Vertical concrete tubes and steel tanks were better contained with parallel broadside antennas, where the apexes of the diffraction hyperbolas better corresponded to the horizontal location of the buried target disposition. The two configurations provide details about buried targets emphasizing how GPR multi-component configurations have the potential to improve the subsurface image quality as well as to discriminate different buried targets. It is judged that they hold some applicability in geotechnical and geoscientific studies. (C) 2009 Elsevier B.V. All rights reserved.

CNPq[307591/2006-9]

FAPESP[02/07509-1]

FAPESP[09/17536-5]

CNPq Brazilian Research Agency

Identificador

JOURNAL OF APPLIED GEOPHYSICS, v.70, n.1, p.1-8, 2010

0926-9851

http://producao.usp.br/handle/BDPI/27175

10.1016/j.jappgeo.2009.12.002

http://dx.doi.org/10.1016/j.jappgeo.2009.12.002

Idioma(s)

eng

Publicador

ELSEVIER SCIENCE BV

Relação

Journal of Applied Geophysics

Direitos

restrictedAccess

Copyright ELSEVIER SCIENCE BV

Palavras-Chave #GPR (Ground Penetrating Radar) #Multi-component #IAG/USP test site #Concrete tubes #Steel tanks #Sao Paulo city #Brazil #GROUND-PENETRATING RADAR #TANKS #Geosciences, Multidisciplinary #Mining & Mineral Processing
Tipo

article

original article

publishedVersion