TY  - JOUR
A1  - Kulesh, Michail A.
A1  - Diallo, Mamadou Sanou
A1  - Holschneider, Matthias
T1  - Wavelet analysis of ellipticity, dispersion, and dissipation properties of Rayleigh waves
N2  - This paper is devoted to the digital processing of multicomponent seismograms using wavelet analysis. The goal of this processing is to identify Rayleigh surface elastic waves and determine their properties. A new method for calculating the ellipticity parameters of a wave in the form of a time-frequency spectrum is proposed, which offers wide possibilities for filtering seismic signals in order to suppress or extract the Rayleigh components. A model of dispersion and dissipation of elliptic waves written in terms of wavelet spectra of complex (two-component) signals is also proposed. The model is used to formulate a nonlinear minimization problem that allows for a high-accuracy calculation of the group and phase velocities and the attenuation factor for a propagating elliptic Rayleigh wave. All methods considered in the paper are illustrated with the use of test signals. (c) 2005 Pleiades Publishing, Inc
Y1  - 2005
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/13737
SN  - 1063-7710
ER  -