The Experts below are selected from a list of 46731 Experts worldwide ranked by ideXlab platform
Thierry Castel - One of the best experts on this subject based on the ideXlab platform.
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Radiative Transfer Modeling of Cross-PolarizedBackscatter From a Pine Forest Using the DiscreteOrdinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely usedto interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiativetransfer equation, usually solved up to first or second order, thustaking into account single and double scattering. Although thisMethod leadsto results agreeing well with copolarized backscattermeasurements, it produces less accurate estimates for hori-zontal–vertical (HV) polarization. This paper presents a radiativetransfer backscatter model that accounts for multiple scatteringby using the discrete ordinate and Eigenvalue Method applied to alayered medium. Using parameters derived from an architecturaltree model, calculations at C- and L-band are compared withHV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Goodagreement is found at C-band for all values of forest biomass,and reasonable agreement at L-band for high biomass, when thesoil backscatter plays a minor role. For low biomass, the L-bandmodeling is inadequatebecauseof difficultiesin estimatingthe soilbackscatter. Comparison with calculations from a first-order ra-diativetransfermodelshowsthatmultiplescatteringissignificant,especially at C-band.
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Radiative transfer modeling of cross-polarized backscatter from a pine forest using the discrete ordinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely used to interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiative transfer equation, usually solved up to first or second order, thus taking into account single and double scattering. Although this Method leads to results agreeing well with copolarized backscatter measurements, it produces less accurate estimates for horizontal-vertical (HV) polarization. This paper presents a radiative transfer backscatter model that accounts for multiple scattering by using the discrete ordinate and Eigenvalue Method applied to a layered medium. Using parameters derived from an architectural tree model, calculations at C- and L-band are compared with HV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Good agreement is found at C-band for all values of forest biomass, and reasonable agreement at L-band for high biomass, when the soil backscatter plays a minor role. For low biomass, the L-band modeling is inadequate because of difficulties in estimating the soil backscatter. Comparison with calculations from a first-order radiative transfer model shows that multiple scattering is significant, especially at C-band.
Ghislain Picard - One of the best experts on this subject based on the ideXlab platform.
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Radiative Transfer Modeling of Cross-PolarizedBackscatter From a Pine Forest Using the DiscreteOrdinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely usedto interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiativetransfer equation, usually solved up to first or second order, thustaking into account single and double scattering. Although thisMethod leadsto results agreeing well with copolarized backscattermeasurements, it produces less accurate estimates for hori-zontal–vertical (HV) polarization. This paper presents a radiativetransfer backscatter model that accounts for multiple scatteringby using the discrete ordinate and Eigenvalue Method applied to alayered medium. Using parameters derived from an architecturaltree model, calculations at C- and L-band are compared withHV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Goodagreement is found at C-band for all values of forest biomass,and reasonable agreement at L-band for high biomass, when thesoil backscatter plays a minor role. For low biomass, the L-bandmodeling is inadequatebecauseof difficultiesin estimatingthe soilbackscatter. Comparison with calculations from a first-order ra-diativetransfermodelshowsthatmultiplescatteringissignificant,especially at C-band.
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Radiative transfer modeling of cross-polarized backscatter from a pine forest using the discrete ordinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely used to interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiative transfer equation, usually solved up to first or second order, thus taking into account single and double scattering. Although this Method leads to results agreeing well with copolarized backscatter measurements, it produces less accurate estimates for horizontal-vertical (HV) polarization. This paper presents a radiative transfer backscatter model that accounts for multiple scattering by using the discrete ordinate and Eigenvalue Method applied to a layered medium. Using parameters derived from an architectural tree model, calculations at C- and L-band are compared with HV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Good agreement is found at C-band for all values of forest biomass, and reasonable agreement at L-band for high biomass, when the soil backscatter plays a minor role. For low biomass, the L-band modeling is inadequate because of difficulties in estimating the soil backscatter. Comparison with calculations from a first-order radiative transfer model shows that multiple scattering is significant, especially at C-band.
Thuy Le Toan - One of the best experts on this subject based on the ideXlab platform.
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Radiative Transfer Modeling of Cross-PolarizedBackscatter From a Pine Forest Using the DiscreteOrdinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely usedto interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiativetransfer equation, usually solved up to first or second order, thustaking into account single and double scattering. Although thisMethod leadsto results agreeing well with copolarized backscattermeasurements, it produces less accurate estimates for hori-zontal–vertical (HV) polarization. This paper presents a radiativetransfer backscatter model that accounts for multiple scatteringby using the discrete ordinate and Eigenvalue Method applied to alayered medium. Using parameters derived from an architecturaltree model, calculations at C- and L-band are compared withHV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Goodagreement is found at C-band for all values of forest biomass,and reasonable agreement at L-band for high biomass, when thesoil backscatter plays a minor role. For low biomass, the L-bandmodeling is inadequatebecauseof difficultiesin estimatingthe soilbackscatter. Comparison with calculations from a first-order ra-diativetransfermodelshowsthatmultiplescatteringissignificant,especially at C-band.
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Radiative transfer modeling of cross-polarized backscatter from a pine forest using the discrete ordinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely used to interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiative transfer equation, usually solved up to first or second order, thus taking into account single and double scattering. Although this Method leads to results agreeing well with copolarized backscatter measurements, it produces less accurate estimates for horizontal-vertical (HV) polarization. This paper presents a radiative transfer backscatter model that accounts for multiple scattering by using the discrete ordinate and Eigenvalue Method applied to a layered medium. Using parameters derived from an architectural tree model, calculations at C- and L-band are compared with HV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Good agreement is found at C-band for all values of forest biomass, and reasonable agreement at L-band for high biomass, when the soil backscatter plays a minor role. For low biomass, the L-band modeling is inadequate because of difficulties in estimating the soil backscatter. Comparison with calculations from a first-order radiative transfer model shows that multiple scattering is significant, especially at C-band.
Shaun Quegan - One of the best experts on this subject based on the ideXlab platform.
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Radiative Transfer Modeling of Cross-PolarizedBackscatter From a Pine Forest Using the DiscreteOrdinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely usedto interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiativetransfer equation, usually solved up to first or second order, thustaking into account single and double scattering. Although thisMethod leadsto results agreeing well with copolarized backscattermeasurements, it produces less accurate estimates for hori-zontal–vertical (HV) polarization. This paper presents a radiativetransfer backscatter model that accounts for multiple scatteringby using the discrete ordinate and Eigenvalue Method applied to alayered medium. Using parameters derived from an architecturaltree model, calculations at C- and L-band are compared withHV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Goodagreement is found at C-band for all values of forest biomass,and reasonable agreement at L-band for high biomass, when thesoil backscatter plays a minor role. For low biomass, the L-bandmodeling is inadequatebecauseof difficultiesin estimatingthe soilbackscatter. Comparison with calculations from a first-order ra-diativetransfermodelshowsthatmultiplescatteringissignificant,especially at C-band.
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Radiative transfer modeling of cross-polarized backscatter from a pine forest using the discrete ordinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely used to interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiative transfer equation, usually solved up to first or second order, thus taking into account single and double scattering. Although this Method leads to results agreeing well with copolarized backscatter measurements, it produces less accurate estimates for horizontal-vertical (HV) polarization. This paper presents a radiative transfer backscatter model that accounts for multiple scattering by using the discrete ordinate and Eigenvalue Method applied to a layered medium. Using parameters derived from an architectural tree model, calculations at C- and L-band are compared with HV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Good agreement is found at C-band for all values of forest biomass, and reasonable agreement at L-band for high biomass, when the soil backscatter plays a minor role. For low biomass, the L-band modeling is inadequate because of difficulties in estimating the soil backscatter. Comparison with calculations from a first-order radiative transfer model shows that multiple scattering is significant, especially at C-band.
Yves Caraglio - One of the best experts on this subject based on the ideXlab platform.
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Radiative Transfer Modeling of Cross-PolarizedBackscatter From a Pine Forest Using the DiscreteOrdinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely usedto interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiativetransfer equation, usually solved up to first or second order, thustaking into account single and double scattering. Although thisMethod leadsto results agreeing well with copolarized backscattermeasurements, it produces less accurate estimates for hori-zontal–vertical (HV) polarization. This paper presents a radiativetransfer backscatter model that accounts for multiple scatteringby using the discrete ordinate and Eigenvalue Method applied to alayered medium. Using parameters derived from an architecturaltree model, calculations at C- and L-band are compared withHV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Goodagreement is found at C-band for all values of forest biomass,and reasonable agreement at L-band for high biomass, when thesoil backscatter plays a minor role. For low biomass, the L-bandmodeling is inadequatebecauseof difficultiesin estimatingthe soilbackscatter. Comparison with calculations from a first-order ra-diativetransfermodelshowsthatmultiplescatteringissignificant,especially at C-band.
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Radiative transfer modeling of cross-polarized backscatter from a pine forest using the discrete ordinate and Eigenvalue Method
IEEE Transactions on Geoscience and Remote Sensing, 2004Co-Authors: Ghislain Picard, Thuy Le Toan, Shaun Quegan, Yves Caraglio, Thierry CastelAbstract:Radiative transfer models have been widely used to interpret the radar backscatter from forested areas. Most of these models are based on an iterative solution of the radiative transfer equation, usually solved up to first or second order, thus taking into account single and double scattering. Although this Method leads to results agreeing well with copolarized backscatter measurements, it produces less accurate estimates for horizontal-vertical (HV) polarization. This paper presents a radiative transfer backscatter model that accounts for multiple scattering by using the discrete ordinate and Eigenvalue Method applied to a layered medium. Using parameters derived from an architectural tree model, calculations at C- and L-band are compared with HV data acquired for a maritime pine forest in the southwest of France during the Spaceborne Imaging Radar-C missions. Good agreement is found at C-band for all values of forest biomass, and reasonable agreement at L-band for high biomass, when the soil backscatter plays a minor role. For low biomass, the L-band modeling is inadequate because of difficulties in estimating the soil backscatter. Comparison with calculations from a first-order radiative transfer model shows that multiple scattering is significant, especially at C-band.