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Quantitative retrieval of soil moisture content and surface roughness from multipolarized radar observations of bare soil surfaces

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1 Author(s)
Yisok Oh ; Sch. of Electron. & Electr. Eng., Hongik Univ., Seoul, South Korea

A semiempirical polarimetric backscattering model for bare soil surfaces is inverted directly to retrieve both the volumetric soil moisture content Mv and the rms surface height s from multipolarized radar observations. The rms surface height s and the moisture content Mv can be read from inversion diagrams using the measurements of the cross-polarized backscattering coefficient σvh0 and the copolarized ratio p(=σhh0vv0). Otherwise, the surface parameters can be estimated simply by solving two equations (σvh0 and p) in two unknowns (Mv and s). The inversion technique has been applied to the polarimetric backscattering coefficients measured by ground-based polarimetric scatterometers and the Jet Propulsion Laboratory airborne synthetic aperture radar. A good agreement was observed between the values of surface parameters (the rms height s, roughness parameter ks, and the volumetric soil moisture content Mv) estimated by the inversion technique and those measured in situ.

Published in:

IEEE Transactions on Geoscience and Remote Sensing  (Volume:42 ,  Issue: 3 )