 |
Open Archive HAL-IRD |  |
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.
Cited literature [14 references]
https://hal.ird.fr/ird-01026279
Contributor : Dominique Bruel <>
Submitted on : Monday, July 21, 2014 - 11:50:02 AM
Last modification on : Friday, March 27, 2020 - 2:04:20 AM
Document(s) archivé(s) le : Monday, November 24, 2014 - 8:59:08 PM
Contributor : Dominique Bruel <>
Submitted on : Monday, July 21, 2014 - 11:50:02 AM
Last modification on : Friday, March 27, 2020 - 2:04:20 AM
Document(s) archivé(s) le : Monday, November 24, 2014 - 8:59:08 PM
File
Mehreziem_calibrated_X_GRSL_v3...
Publisher files allowed on an open archive
