Аннотация
Multi-component seismic data contain richer information about the
elastic parameters of the subsurface than do conventional single-component
data. Separation of the compressional and shear wavefields from multi-component
seismic data is crucial in estimating the subsurface elastic properties.
We present a tau-p domain scheme to separate P- and SV-wavefields
from multi-component seismic data observed at the free surface and
ocean bottom. Based on plane-wave components with known horizontal
slowness in tau-p domain, the whole P- and SV-wavefields are separated
into the direction of observed P- and SV-wave oscillations, by rotation
of the horizontal and vertical components respectively. The incident
P- and SV-waves are extracted from the separated wavefields using
plane wave partitions at the free surface and ocean bottom. The parameters
used in the separation are the local seismic wave velocities and
the density at the receiver location. Numerical tests on synthetic
data for plane-layered models show good performance and accuracy
of the scheme.
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