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Effects of surface hetero-geneity on thermal remote sensing of land parameters, " in Scaling Up in Hydrology Using Remote Sensing, A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, " Soil Sci. Soc. Amer.timating generalized soil-water characteristics from texture, " Soil Sci. Tests of sequential data assimilation for(More)
We study the capabilities of low frequency radar systems to sound the subsurface in arid countries. This approach is based on the coupling between two complementary radar techniques: the airborne Synthetic Aperture Radar (SAR) used in L-band (1.2 GHz) for imaging large scale subsurface structures, and the Ground-Penetrating Radar (GPR) used between 500 and(More)
In this paper, we propose an analysis of P band radar signal potential to retrieve soil moisture root profile. Our analysis is based on two electromagnetic models, the small perturbation method and the small slope approximation. There models consider electromagnetic scattering from three-dimensional layered structures with an arbitrary number of rough(More)
The goal of this study is to discuss the effect of multi-frequency radar configurations on the relationship between surface soil moisture and the nature of radar backscatter over bare soils. In an attempt to answer this question, the Advanced Integral Equation Model (AIEM) was used to simulate backscatter from soil surfaces with various moisture vertical(More)
In the present paper, the potential use of P-band radar signals for the estimation of soil roughness parameters is analyzed. The (IEM) Integral Equation Model is applied to investigate the sensitivity to soil surface parameters of backscattered P-band signals. A new parameter for roughness referred to as Zp, combining the root mean square surface height and(More)
The objective of this paper is to improve the understanding of surface roughness description based on experimental campaigns involving the ASAR-ENVISAT (Advanced Synthetic Aperture Radar) radar. Two presentations of surface correlation function are proposed in this study: () () () α ρ l x e s x / 2 − = and () () [ ] ()) / (2 / l x b a a l x e s x + − = ρ.(More)
This paper presents an original methodology to retrieve surface soil moisture based on the use of the ENVISAT-ASAR multi-incidence angle sensor. Previous studies using ERS and RADARSAT SAR have shown the potential of radar signals to monitor surface soil moisture with one incidence-angle data and a simple linear relationship. This work aims at developing(More)
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