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For ALOS/PALSAR in orbit, removal of not only polarimetric system distortion but also the effect of Faraday rotation is important. The author investigated a new calibration method using polarization orientation induced in build-up areas. Its fundamental concept is simple and is that two polarization orientation angles from two polarization combinations should be identical after calibration. This method...
A new method is developed to model the volume backscattering from dry snow. The model is a combination of the exact field approach and zeroth order vector radiative transfer theory. The field approach is used to define the scattering characteristics in a single almost indefinite small snow volume unit and the calculation is realized with discrete dipole approximation (DDA). The radiative transfer...
Dense media radiative transfer theory (DMRT) is used to study the multiple scattering effects in active microwave remote sensing. To solve the dense media radiative transfer equation, we decompose the diffuse intensities into Fourier series in the azimuthal direction. Each harmonic is solved by the eigen-quadrature approach. The solution includes full multiple scattering effects within DMRT. Comparisons...
The extinction-to-backscatter ratio (Sa) values and phase functions were calculated from mean properties of aerosol models determined from a statistically significant number of AERONET measurements. Cluster analysis by partitioning was used to categorize the AERONET data set based on several optical and physical characteristics of the aerosol. Using the mean values of the optical and microphysical...
Retrieval of soil moisture under corn canopies has been investigated by many researchers and is still a problem that is not fully assessed. Corn is an organized canopy. This feature produces effects not observed from natural canopies. One such effect is the dependence of sensor response on the azimuthal direction. The aim of this study is to explore these distinguishing effects by Monte-Carlo simulations.
The use of a theoretical backscatter model to analyse medium to low spatial resolution microwave data is still very complicated, particularly because of the difficulty in defining a unique roughness parameter, capable of adequately representing heterogeneous terrain. In this paper, an approach is proposed for roughness analysis and the modelling of backscattering, under conditions of surface heterogeneity...
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