P-003 SAMPLING ISSUES IN THE REFLECTIVITY METHOD FOR GENERAL ANISOTROPIC MEDIA G. BERNASCONI G. DRUFUCA A. GRANDI Politecnico di Milano Dipartimento di Elettronica e Informazione Piazza Leonardo Da Vinci 32 20133 Milan Italy Summary 1 1 The reflectivity method for the computation of synthetic seismograms in layered isotropic media is widely used but in anisotropic media it requires a relevant number of computations because propagation becomes a 3D problem. To reduce the computation time we suggest to sample horizontal wavenumbers with a polar grid: anti-aliasing conditions are less strict than in Cartesian coordinates allowing a smaller sampling. Introduction For isotropic


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