Description of Invention
Theoretical model for vegetation was previously developed by approximating the scatterers into simple shapes such as sphere, cylinder, needles, elipsoid and elliptic disk, hence limiting the accuracy and capability of the backscattering analysis methods. However, since the shapes of the scatterers are more natural and complex in real nature, modelling an accurate complex vegetation scattering model, with the help of computational electromagnetics, may give accurate scattered result, as well as understanding of scattering process of the complex objects. Moreover, utililzing computational electromagnetics in the calculation of the volume scattering gives the freedom to model any shape of scatterer, as oppose to the limited shapes of scatterers available in previous analytical models. Therefore, this research aims to increase the efficiency and accuracy in modelling vegetation, where Relaxed Hierarchical Equivalent Source Algorithm (RHESA) is proposed to calculate the volume scattering of the arbitrary shaped objects with volumes such as leaves, branches and trunks, which was previously based on the generalized approximation for cylindrical and elliptic objects. The new model is validated through theoretical analysis where the results from this model matches with the results from previous analytical model for similar cases. RHESA can be used to replace the analytical model in developing a more accurate theoretical model for vegetation, with the ability to use more realistic shapes of scatterers in future.