"Unlocking" the Ground: Increasing the Detectability of Buried Objects by Depositing Passive Superstrates

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"Unlocking" the Ground : Increasing the Detectability of Buried Objects by Depositing Passive Superstrates. / Valagiannopoulos, Constantinos A.; Tsitsas, Nikolaos L.; Sihvola, Ari H.

In: IEEE Transactions on Geoscience and Remote Sensing, Vol. 54, No. 6, 7435296, 06.2016, p. 3697-3709.

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@article{23d8dde9f12346bb9970b6d9aa185945,
title = "{"}Unlocking{"} the Ground: Increasing the Detectability of Buried Objects by Depositing Passive Superstrates",
abstract = "One of the main problems when trying to detect the position and other characteristics of a small inclusion into lossy Earth via external measurements is the object's poor scattering response due to attenuation. Hence, increasing the scattered power generated by the inclusion when using not an active but a passive material is of great interest. To this direction, we examine a procedure of {"}unlocking{"} the ground by depositing a thin passive layer of conventional material atop of it. The first step is to significantly enhance the transmission into a lossy half-space, in the absence of the inclusion, by covering it with a passive slab. The redistribution of the fields into the slab and the infinite half-space, due to the interplay of waves between the interfaces, makes it possible to determine the thickness and permittivity of an optimal layer. The full boundary value problem (including the inclusion and the deposited superstrate) is solved semianalytically via integral equation techniques. Then, the scattered power of the buried inclusion is compared to the corresponding quantity when no additional layer is present. We report a substantial improvement in the detectability of the inclusion for several types of ground and burying depths by using conventional lossy materials. Implementation aspects in potential applications as well as possible future generalizations are also discussed. The developed technique may constitute an effective {"}configuration (structural) preprocessing{"} which may be used as a first step in the analysis of related problems before the application of an inverse scattering algorithm concerning the efficient processing of the scattering data.",
keywords = "Buried inclusion, detectability, integral equations, inverse scattering, mixing formulas, PLANAR AIR-SOIL, LAYERED MEDIA, PENETRATING RADAR, ELECTROMAGNETIC SCATTERING, DIELECTRIC OBJECTS, INVERSE SCATTERING, MODEL, RECONSTRUCTION, SIMULATION, INTERFACE",
author = "Valagiannopoulos, {Constantinos A.} and Tsitsas, {Nikolaos L.} and Sihvola, {Ari H.}",
year = "2016",
month = "6",
doi = "10.1109/TGRS.2016.2525733",
language = "English",
volume = "54",
pages = "3697--3709",
journal = "IEEE Transactions on Geoscience and Remote Sensing",
issn = "0196-2892",
number = "6",

}

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TY - JOUR

T1 - "Unlocking" the Ground

T2 - Increasing the Detectability of Buried Objects by Depositing Passive Superstrates

AU - Valagiannopoulos, Constantinos A.

AU - Tsitsas, Nikolaos L.

AU - Sihvola, Ari H.

PY - 2016/6

Y1 - 2016/6

N2 - One of the main problems when trying to detect the position and other characteristics of a small inclusion into lossy Earth via external measurements is the object's poor scattering response due to attenuation. Hence, increasing the scattered power generated by the inclusion when using not an active but a passive material is of great interest. To this direction, we examine a procedure of "unlocking" the ground by depositing a thin passive layer of conventional material atop of it. The first step is to significantly enhance the transmission into a lossy half-space, in the absence of the inclusion, by covering it with a passive slab. The redistribution of the fields into the slab and the infinite half-space, due to the interplay of waves between the interfaces, makes it possible to determine the thickness and permittivity of an optimal layer. The full boundary value problem (including the inclusion and the deposited superstrate) is solved semianalytically via integral equation techniques. Then, the scattered power of the buried inclusion is compared to the corresponding quantity when no additional layer is present. We report a substantial improvement in the detectability of the inclusion for several types of ground and burying depths by using conventional lossy materials. Implementation aspects in potential applications as well as possible future generalizations are also discussed. The developed technique may constitute an effective "configuration (structural) preprocessing" which may be used as a first step in the analysis of related problems before the application of an inverse scattering algorithm concerning the efficient processing of the scattering data.

AB - One of the main problems when trying to detect the position and other characteristics of a small inclusion into lossy Earth via external measurements is the object's poor scattering response due to attenuation. Hence, increasing the scattered power generated by the inclusion when using not an active but a passive material is of great interest. To this direction, we examine a procedure of "unlocking" the ground by depositing a thin passive layer of conventional material atop of it. The first step is to significantly enhance the transmission into a lossy half-space, in the absence of the inclusion, by covering it with a passive slab. The redistribution of the fields into the slab and the infinite half-space, due to the interplay of waves between the interfaces, makes it possible to determine the thickness and permittivity of an optimal layer. The full boundary value problem (including the inclusion and the deposited superstrate) is solved semianalytically via integral equation techniques. Then, the scattered power of the buried inclusion is compared to the corresponding quantity when no additional layer is present. We report a substantial improvement in the detectability of the inclusion for several types of ground and burying depths by using conventional lossy materials. Implementation aspects in potential applications as well as possible future generalizations are also discussed. The developed technique may constitute an effective "configuration (structural) preprocessing" which may be used as a first step in the analysis of related problems before the application of an inverse scattering algorithm concerning the efficient processing of the scattering data.

KW - Buried inclusion

KW - detectability

KW - integral equations

KW - inverse scattering

KW - mixing formulas

KW - PLANAR AIR-SOIL

KW - LAYERED MEDIA

KW - PENETRATING RADAR

KW - ELECTROMAGNETIC SCATTERING

KW - DIELECTRIC OBJECTS

KW - INVERSE SCATTERING

KW - MODEL

KW - RECONSTRUCTION

KW - SIMULATION

KW - INTERFACE

U2 - 10.1109/TGRS.2016.2525733

DO - 10.1109/TGRS.2016.2525733

M3 - Article

VL - 54

SP - 3697

EP - 3709

JO - IEEE Transactions on Geoscience and Remote Sensing

JF - IEEE Transactions on Geoscience and Remote Sensing

SN - 0196-2892

IS - 6

M1 - 7435296

ER -

ID: 6488784