Analytical Solution for Permittivities of a Dihedral Configuration

Couderc, Orian; Thirion-Lefevre, Laetitia; Guinvarcrh, Regis

doi:10.1109/lawp.2018.2796842

Cited by 7 publications

(10 citation statements)

References 10 publications

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“…For low orientation angles, the intensities backscattered at HH and VV are equal for PEC dihedral corner reflector, while there may be a significant difference in the dielectric case. Besides, we have shown that this property can be exploited to retrieve the complex permittivities of dielectric dihedral structures [16]. When an orientation angle is applied, this choice is still crucial.…”

Section: Discussionmentioning

confidence: 99%

The Combined Effect of Orientation Angle and Material on PolSAR Images of Urban Areas

2020

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Polarimetric Synthetic Aperture Radar (PolSAR) images containing cities may exhibit misclassified areas when using polarimetric decompositions. Several articles relate this problem to the effects of orientation between the facades of buildings and the acquisition trajectory. Materials also play a role in polarimetric behavior. This paper deals with this combined effect of material and orientation. It analyzes different sets of data, airborne or space-borne, at L-, C- and X-bands, and for different orientation angles. It shows that considering dielectric dihedral rather than metallic in the polarimetric mechanism of double-bounce has a very important impact on the differences of intensities between the channels HH and VV. This difference is very important for small angles of orientation, and then decreases for large angles. Furthermore, the curves of the ratios between polarimetric intensities as a function of the orientation angle vary little with the materials and the frequencies encountered in all the scenarios envisaged. The signal of the ratio VV/HH raises a plateau around −1 dB for orientations higher than 30°. We also observe a plateau for HV/HH, but with a value around −5 dB.

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Section: Discussionmentioning

confidence: 99%

The Combined Effect of Orientation Angle and Material on PolSAR Images of Urban Areas

2020

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“…It is very convenient to use the ratio method developed upon the work of [2] since considering the ratio ρ as following removes the dependencies on fine calibration requirements in measurements,…”

Section: The Ratio Methodsmentioning

confidence: 99%

“…The available comprehensive theory of electromagnetic wave scattering from random rough surfaces are based on integral equations themselves and hence the inverse multipath scattering problems are without doubt highly non-linear. For a polarimetric real aperture radar, permittivity inversion of a double bounce caused by a perfect dihedral has been extensively studied in [2,3,4] while assuming specular reflection at each surface.…”

Section: Introductionmentioning

confidence: 99%

“…The double bounce is a prominent feature available in almost all polarimetric SAR image decompositions and is widely present in the vicinity of both natural and man-made structures where the principal geometry of a resolution cell can be approximated by a diheadral which causes a strong backscatter. Hence, we present here an interesting first test, in an attempt to extend the validity of the inversion method proposed in [2], to double bounces in SAR images using X-band Airborne data from SETHI-ONERA.…”

Section: Introductionmentioning

confidence: 99%

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A First Test on Permittivty Inversion of a Double Bounce in a SAR Image

Tyler

Dupuis

Thirion-Lefevre

et al. 2022

IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium

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“…T HE possibility to separately retrieve permittivities of a dihedral structure using two independent measurements has been first demonstrated and extensively studied in [1] [2], where the dihedral possesses no rotation, i.e. ϕ = 0 • .…”

Section: Introductionmentioning

confidence: 99%

Numerical Schemes to Retrieve Permittivities from Rotated Double Bounce Signatures in Polarimetric SAR Images

Tyler,

Dupuis,

Guinvarc’h

et al. 2023

IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium

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In this paper, we propose an extension to an existing permittivity inversion scheme by taking into account double bounce scattering from a rotated dihedral geometry. By considering the rotational aspect, we aim to broaden the applicability of the permittivity inversion scheme for rotated double bounce signatures present in Synthetic Aperture Radar (SAR) imagery. The validity is first demonstrated by invoking to the characteristics of the co-pol ratio through simulations. The inversion scheme is then tested on real airborne SAR data to further validate its effectiveness in real-world scenarios.

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Analytical Solution for Permittivities of a Dihedral Configuration

Cited by 7 publications

References 10 publications

The Combined Effect of Orientation Angle and Material on PolSAR Images of Urban Areas

The Combined Effect of Orientation Angle and Material on PolSAR Images of Urban Areas

A First Test on Permittivty Inversion of a Double Bounce in a SAR Image

Numerical Schemes to Retrieve Permittivities from Rotated Double Bounce Signatures in Polarimetric SAR Images

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