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International Journal of Remote Sensing Volume 31, 2010 - Issue 15
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Original Articles

Sensitivity of bistatic scattering to soil moisture and surface roughness of bare soils

Marco Brogioni Microwave Remote Sensing Group: Institute of Applied Physics (IFAC-CNR), Florence, ItalyCorrespondence[email protected]
,
Simone Pettinato Microwave Remote Sensing Group: Institute of Applied Physics (IFAC-CNR), Florence, Italy
,
Giovanni Macelloni Microwave Remote Sensing Group: Institute of Applied Physics (IFAC-CNR), Florence, Italy
,
Simonetta Paloscia Microwave Remote Sensing Group: Institute of Applied Physics (IFAC-CNR), Florence, Italy
,
Paolo Pampaloni Microwave Remote Sensing Group: Institute of Applied Physics (IFAC-CNR), Florence, Italy
,
Nazzareno Pierdicca Department of Electronic Engineering, University of Rome ‘La Sapienza’, Rome, Italy
&
Francesca Ticconi Department of Electronic Engineering, University of Rome ‘La Sapienza’, Rome, Italy
 show all
Pages 4227-4255 | Received 23 Jul 2007, Accepted 10 Jul 2008, Published online: 13 Sep 2010
 
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Abstract

The sensitivity of bistatic scattering coefficient σ° to soil moisture content (SMC) and surface roughness was investigated by means of model simulations of the incoherent scattered fields performed with the advanced integral equation model (AIEM) and the second order small perturbation model (SPM). The study was performed by simulating scattering on the whole upper half space, for different values of incident angles. The achieved results, represented as maps of σ° as a function of azimuth and zenith angles, were evaluated by means of a quality index which takes into consideration the effect of roughness on SMC measurement. The sensitivity analysis has pointed out that for measuring SMC a bistatic observation, by itself or combined with the monostatic one, can make appreciable improvements with respect to classical monostatic radar. Appendix A contains the AIEM formulas corrected for several typographical errors present in the specific literature.

Acknowledgements

This work has been performed under ESA ESTEC Contract N 19173/05/NL/GLC. The authors want to thank Dr. Nicolas Fleury for his useful comments and suggestions.

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