Comparison between backscattered TerraSAR signals and simulations from the radar backscattering models IEM, Oh, and Dubois - IRD - Institut de recherche pour le développement Access content directly
Journal Articles IEEE Geoscience and Remote Sensing Letters Year : 2011

Comparison between backscattered TerraSAR signals and simulations from the radar backscattering models IEM, Oh, and Dubois

Abstract

The objective of this paper is to evaluate on bare soils the surface backscattering models IEM, Oh, and Dubois in X-band. This analysis uses a large database of TerraSAR-X images and in situ measurements (soil moisture and surface roughness). Oh's model correctly simulates the radar signal for HH and VV polarizations whereas the simulations performed with the Dubois model show a poor correlation between TerraSAR data and model. The backscattering Integral Equation Model (IEM) model simulates correctly the backscattering coefficient only for rms<1.5 cm in using an exponential correlation function, and for rms>1.5 cm in using Gaussian function. However, the results are not satisfactory for a use of IEM in the inversion of TerraSAR data. A semi-empirical calibration of IEM was done in X-band. Good agreement was found between the TerraSAR data and the simulations using the calibrated version of the IEM.
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Dates and versions

ird-01026279 , version 1 (21-07-2014)

Identifiers

  • HAL Id : ird-01026279 , version 1

Cite

N. Baghdadi, E. Saba, M. Aubert, Mehrez Zribi, Frédéric Baup. Comparison between backscattered TerraSAR signals and simulations from the radar backscattering models IEM, Oh, and Dubois. IEEE Geoscience and Remote Sensing Letters, 2011, 6 (8), p. 1160-1164. ⟨ird-01026279⟩
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