Analysis of the Effect of Soil Roughness in the Forward-Scattering Interference Pattern Using Second-Order Small Perturbation Method Simulations

Soil moisture (SM) is a key geophysical variable that can be estimated at regional scales using remote sensing techniques, by making use of the known relationship between soil reflectivity and the dielectric constant in the microwave regime. In this context, the exploitation of available illuminator...

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Detalles Bibliográficos
Publicado: 2018
Materias:
Electromagnetic and remote sensing
Global Navigation Satellite System data
microwave radiometry
surface and subsurface properties.
Antennas
Forward scattering
Radar systems
Remote sensing
Soil moisture
Synthetic aperture radar
Global Navigation Satellite Systems
Interference patterns
Microwave radiometry
Reflected signal
Remote sensing techniques
Small perturbation method
Small perturbation models
Subsurface properties
Perturbation techniques
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1545598X_v_n_p_Franco
http://hdl.handle.net/20.500.12110/paper_1545598X_v_n_p_Franco
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_1545598X_v_n_p_Franco
record_format dspace
spelling paper:paper_1545598X_v_n_p_Franco2023-06-08T16:21:13Z Analysis of the Effect of Soil Roughness in the Forward-Scattering Interference Pattern Using Second-Order Small Perturbation Method Simulations Electromagnetic and remote sensing Global Navigation Satellite System data microwave radiometry surface and subsurface properties. Antennas Forward scattering Radar systems Remote sensing Soil moisture Synthetic aperture radar Global Navigation Satellite Systems Interference patterns Microwave radiometry Reflected signal Remote sensing techniques Small perturbation method Small perturbation models Subsurface properties Perturbation techniques Soil moisture (SM) is a key geophysical variable that can be estimated at regional scales using remote sensing techniques, by making use of the known relationship between soil reflectivity and the dielectric constant in the microwave regime. In this context, the exploitation of available illuminators of opportunity that currently emit large amounts of power at microwave frequencies (compared to typical synthetic aperture radar systems) is promising. Some published techniques estimate SM by analyzing the interference pattern (IP) between direct and reflected signal as measured by a single antenna (i.e., IP technique). In this letter, a new approach to simulate the IP is proposed, in which the soil roughness is modeled straightforwardly using the second-order small perturbation model. Results illustrate that the ``notch'' in the VV-polarization IP (related to the Brewster angle) can only be directly observed for very low values of soil rms roughness (s < 0.5 cm). For typical values of soil roughness (s~ 1.2 cm), the notch disappears and only a minimum in the IP is observed near the Brewster angle. IEEE 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1545598X_v_n_p_Franco http://hdl.handle.net/20.500.12110/paper_1545598X_v_n_p_Franco
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Electromagnetic and remote sensing
Global Navigation Satellite System data
microwave radiometry
surface and subsurface properties.
Antennas
Forward scattering
Radar systems
Remote sensing
Soil moisture
Synthetic aperture radar
Global Navigation Satellite Systems
Interference patterns
Microwave radiometry
Reflected signal
Remote sensing techniques
Small perturbation method
Small perturbation models
Subsurface properties
Perturbation techniques
spellingShingle Electromagnetic and remote sensing
Global Navigation Satellite System data
microwave radiometry
surface and subsurface properties.
Antennas
Forward scattering
Radar systems
Remote sensing
Soil moisture
Synthetic aperture radar
Global Navigation Satellite Systems
Interference patterns
Microwave radiometry
Reflected signal
Remote sensing techniques
Small perturbation method
Small perturbation models
Subsurface properties
Perturbation techniques
Analysis of the Effect of Soil Roughness in the Forward-Scattering Interference Pattern Using Second-Order Small Perturbation Method Simulations
topic_facet Electromagnetic and remote sensing
Global Navigation Satellite System data
microwave radiometry
surface and subsurface properties.
Antennas
Forward scattering
Radar systems
Remote sensing
Soil moisture
Synthetic aperture radar
Global Navigation Satellite Systems
Interference patterns
Microwave radiometry
Reflected signal
Remote sensing techniques
Small perturbation method
Small perturbation models
Subsurface properties
Perturbation techniques
description Soil moisture (SM) is a key geophysical variable that can be estimated at regional scales using remote sensing techniques, by making use of the known relationship between soil reflectivity and the dielectric constant in the microwave regime. In this context, the exploitation of available illuminators of opportunity that currently emit large amounts of power at microwave frequencies (compared to typical synthetic aperture radar systems) is promising. Some published techniques estimate SM by analyzing the interference pattern (IP) between direct and reflected signal as measured by a single antenna (i.e., IP technique). In this letter, a new approach to simulate the IP is proposed, in which the soil roughness is modeled straightforwardly using the second-order small perturbation model. Results illustrate that the ``notch'' in the VV-polarization IP (related to the Brewster angle) can only be directly observed for very low values of soil rms roughness (s < 0.5 cm). For typical values of soil roughness (s~ 1.2 cm), the notch disappears and only a minimum in the IP is observed near the Brewster angle. IEEE
title Analysis of the Effect of Soil Roughness in the Forward-Scattering Interference Pattern Using Second-Order Small Perturbation Method Simulations
title_short Analysis of the Effect of Soil Roughness in the Forward-Scattering Interference Pattern Using Second-Order Small Perturbation Method Simulations
title_full Analysis of the Effect of Soil Roughness in the Forward-Scattering Interference Pattern Using Second-Order Small Perturbation Method Simulations
title_fullStr Analysis of the Effect of Soil Roughness in the Forward-Scattering Interference Pattern Using Second-Order Small Perturbation Method Simulations
title_full_unstemmed Analysis of the Effect of Soil Roughness in the Forward-Scattering Interference Pattern Using Second-Order Small Perturbation Method Simulations
title_sort analysis of the effect of soil roughness in the forward-scattering interference pattern using second-order small perturbation method simulations
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1545598X_v_n_p_Franco
http://hdl.handle.net/20.500.12110/paper_1545598X_v_n_p_Franco
_version_ 1768544519582646272

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