Theoretical aspects and numerical solution of scattering from objects under grazing angle incidence - The A380 and the aircraft tailfin

System simulations require the systematic scattering analysis of the distorting objects. An adequate efficient 3D-modeling of an A380 and subsequent scattering analysis and numerical system simulations are discussed for different model approximations. The modeling ranges from simple rectangular plates up to the most accurate 3D-model which includes the 3D voluminous tailfin. It has been shown that the simple models for the A380 fail for the grazing angle incidence even if the best available numerical methods are used. These models do not describe the physical features of the aircraft or the tail fin correctly. By that the modeling and the applied numerical methods is a critical issue in approximate models for complex objects in the possible and relevant geometrical scenarios.