Volumetric Moisture Effects on the Microwave Stability of Bare Soil
DEI PhD Student
DEI - Aula 3B
22 novembre 2011
An increasing number of microwave remote sensing applications exploiting the backscatter information of the natural targets in the scene are being developed. The purpose of such investigations is either the calibration of the sensor or the retrieval and classification of the distinctive features of the scatterers, e.g. the target displacement in interferometry, or the soil moisture estimation in environental analyses. This latter parameter, the volumetric soil moisture, and in particular its influence on the electromagnetic scattered field from a bare soil surface, represents the subject of the present work. The aim being the evaluation of the theoretical scattering statistics through a convenient synthetic model development.
It was decided to approach the EM problem by means of the MLFMM (MultiLevel Fast Multipole Method) numerical technique, based on a hierarchical implementation of the classical method of moments (MoM) , provided by a commercial EM simulation software (FEKO). The benefits as well as the accuracy and the computational requirements of the implemented model are discussed together with the simulation results of some representative case studies.
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