Microwave Tomography-Enhanced GPR in Forensic Surveys: The Case Study of a Tropical Environment

Almeida, Emerson Rodrigo; Porsani, Jorge Luís; Catapano, Ilaria; Gennarelli, Gianluca; Soldovieri, Francesco

doi:10.1109/jstars.2015.2466556

Cited by 26 publications

(10 citation statements)

References 21 publications

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“…MT was compared to conventional migration techniques for imaging metallic and plastic pipes in [9], under controlled experimental conditions, where it was shown that MT is capable of providing improved accuracy and resolution. A similar study was carried out in [15] in a forensic application scenario. A theoretical analysis of the reconstruction performance of the MT and migration was carried out in [16], based on the Singular Value Decomposition of the relevant operator.…”

Section: Introductionmentioning

confidence: 92%

A Controlled-Site Comparison of Microwave Tomography and Time-Reversal Imaging Techniques for GPR Surveys

et al. 2018

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This paper provides a comparative study between microwave tomography and synthetic time-reversal imaging techniques as applied to ground penetrating radar (GPR) surveys. The comparison is carried out by processing experimental data collected at a controlled test site, with different types of buried targets at given subsurface depths and representative soil conditions. It is shown that the two techniques allow us to obtain complementary information about position, depth and size of the targets from a single GPR survey.

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Section: Introductionmentioning

confidence: 92%

A Controlled-Site Comparison of Microwave Tomography and Time-Reversal Imaging Techniques for GPR Surveys

et al. 2018

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“…Its linearization is done by means of the Born approximation [31], which assumes that the targets are small in terms of the wavelength and have low contrast compared to the background material. Some results of MT applied to GPR data can be found in literature, like in studies for archaeology and forensics [32] and underground features mapping [33] for instance. The tomographic images were obtained with the RadImage v1.0 program [34] and they are presented in the next section.…”

Section: Data Acquisition and Processingmentioning

confidence: 99%

GPR Tomography as Support for an Archaeological Excavation in Aripuanã Indigenous Cemetery, Amazon Region, Brazil

Porsani¹,

Kipnis²,

Santos³

et al. 2017

IJG

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We present here a series of Ground Penetrating Radar (GPR) survey carried out in different areas of the Dardanelos 1 archaeological site in order to generate information about subsurface anomalies associated with archaeological material that could be use in decision making within the environmental licensing process of the Dardanelos Hydroelectric Power Plant, located near of the Aripuanã city, Mato Grosso State, northwest region of Brazil. GPR surveys with 200 MHz antenna were carried out in two blocks aiming to locate archaeological resources and features. The analysis of GPR 2D and 3D results allowed detecting anomalous regions characterized by hyperbolic reflections, shallow elongated continuous targets with high amplitudes, as well as sub-horizontal reflectors. Microwave tomography allowed estimating the geometry of the GPR anomalies sources. Excavations were done by archaeologists at the locations where hyperbolic anomalies were found, revealing interesting structures related to urns in the middle of a rich in organic matter consisting of black and ceramic materials up to about 1 m deep. The first sub-horizontal reflector at approximately 1 m depth is related to the base of the black soil layer rich in organic matter and the second sub-horizontal reflector between 2 and 3 m deep suggests a lithological change or may be related to presence of the water table. The continuous elongated shallow targets observed in the depth slices are related to tree roots in the middle of the archaeological strata. The GPR results guided archaeological excavations, reduced the time and costs involved in research, and contributed to the preservation of Brazilian historical heritage.

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“…In equation (8) an additional approximation is made by ignoring evanescent waves at depth levels z 0 and z i . State A represents the focusing wavefield where the electric field focuses at the location x i at depth z i and its up and downgoing components of the magnetic field are at the level ∂D 0 in the time domain represented as f ± 1 (x 0 , x i , t) as shown in Figure 1.…”

Section: Green's Function Representation For Virtual Source and Vmentioning

confidence: 99%

“…Retrieving up-and downgoing parts of the Green's function for a virtual receiver inside the earth allows for creating an image that is free from artefacts. Such artefacts would occur when the measured surface reflection response would be used to make an image using a standard (model-driven) migration scheme [6]- [8] or linearised inversion [9]. A next step is creating the Green's functions between any two points in the subsurface.…”

Section: Introductionmentioning

confidence: 99%

A lossless earth Green's function representation between any two subsurface points from surface reflection GPR data

Slob

Wapenaar

2017

2017 9th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)

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Abstract-We present a three-dimensional scheme that can be used to compute the electromagnetic impulse response between any two subsurface points from surface reflection data measured at a single surface of a lossless medium. The scheme first computes a virtual vertical radar profile using the Marchenko scheme from which focusing wavefields are computed. With the aid of the Green's functions of the virtual vertical radar profiles these focusing wavefields are then used to compute the Green's function between any two points in the subsurface. One point is a virtual receiver and the other point is a virtual source. Virtual radar images can be created as well as the whole time evolution of the radar wave field throughout the subsurface generated by any subsurface virtual source. We show with a numerical example that the method works well in a one-dimensional configuration.

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Microwave Tomography-Enhanced GPR in Forensic Surveys: The Case Study of a Tropical Environment

Cited by 26 publications

References 21 publications

A Controlled-Site Comparison of Microwave Tomography and Time-Reversal Imaging Techniques for GPR Surveys

A Controlled-Site Comparison of Microwave Tomography and Time-Reversal Imaging Techniques for GPR Surveys

GPR Tomography as Support for an Archaeological Excavation in Aripuanã Indigenous Cemetery, Amazon Region, Brazil

A lossless earth Green's function representation between any two subsurface points from surface reflection GPR data

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Microwave Tomography-Enhanced GPR in Forensic Surveys: The Case Study of a Tropical Environment

Cited by 26 publications

References 21 publications

A Controlled-Site Comparison of Microwave Tomography and Time-Reversal Imaging Techniques for GPR Surveys

A Controlled-Site Comparison of Microwave Tomography and Time-Reversal Imaging Techniques for GPR Surveys

GPR Tomography as Support for an Archaeological Excavation in Aripuan&#227; Indigenous Cemetery, Amazon Region, Brazil

A lossless earth Green's function representation between any two subsurface points from surface reflection GPR data

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GPR Tomography as Support for an Archaeological Excavation in Aripuanã Indigenous Cemetery, Amazon Region, Brazil