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Vector attenuation: elliptical polarization, raypaths and the Rayleigh‐window effect
- Source: Geophysical Prospecting, Volume 54, Issue 4, Jun 2006, p. 399 - 407
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- 29 Jun 2006
Abstract
ABSTRACT
Waves in dissipative media exhibit elliptical polarization. The direction of the major axis of the ellipse deviates from the propagation direction. In addition, Snell's law does not give the raypath, since the propagation (wavevector) direction does not coincide with the energy‐flux direction. Each of these physical characteristics depends on the properties of the medium and on the inhomogeneity angle of the wave. The calculations are relevant for multicomponent surveys, where the receivers are placed on the ocean‐floor. An example of the role played by inhomogeneous waves is given by the Rayleigh‐window effect, which implies a significant amplitude reduction of the reflection coefficient of the ocean‐bottom.