caa a22 4500 475813944 CHVBK 20180406123805.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1007/PL00001114 doi (NATIONALLICENCE)springer-10.1007/PL00001114 Ray Tracing in Elastic and Viscoelastic Media [Elektronische Daten] [A. Hanyga, M. Seredyńska] —We consider several extensions of ray tracing (uniform asymptotics, complex rays, space-time rays) interrelated by the fact that they must be used jointly in order to deal with both focusing and attenuation. Two representative models of acoustic wave propagation are considered: elasticity and viscoelasticity. Basic ideas behind canonical functions and Maslov integrals for uniformly asymptotic evaluation of the wave field from ray field parameters are discussed. Complex space-time ray tracing algorithms for dispersive and attenuating media are presented. Two models of attenuation in a viscoelastic medium are compared: (1) complex space-time ray methods for general attenuation/dispersion, (2) real ray methods for weak attenuation. Birkhäuser Verlag Basel,, 1999 Key Words: Asymptotic ray theory, viscoelasticity, attenuation nationallicence Hanyga A. Institute for Solid Earth Physics, University of Bergen, Allégaten 41, 5007 Bergen, Norway., NO aut Seredyńska M. Institute of Fundamental Technological Research, Polish Academy of Sciences, Świętokrzyska 21, 00-049 Warszawa, Poland., PL aut https://doi.org/10.1007/PL00001114 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00001114 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hanyga A. Institute for Solid Earth Physics, University of Bergen, Allégaten 41, 5007 Bergen, Norway., NO aut NATIONALLICENCE 700 1- Seredyńska M. Institute of Fundamental Technological Research, Polish Academy of Sciences, Świętokrzyska 21, 00-049 Warszawa, Poland., PL aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer