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The authors document our efforts to compute radar cross sections using a generalization of the FDTD (finite difference time domain) Yee algorithm (1966) in which a nonorthogonal target-conforming mesh may be applied. Both 2D and 3D formulations are presented, although at present they only have 2D numerical results. Two-dimensional problems considered involve an S-shaped duct (S-duct) and an ogive. At least nine distinct resonances are correctly predicted by the S-duct model. The primary goal is to model oblique or curved surfaces without the use of staircasing.>
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Holland et al. (1991) studied this question.
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