Zusammenfassung
This paper introduces and discusses a new polarization filter which
can aid interpretation of single or multichannel multicomponent seismograms.
We define a measure of degree of polarization based on instantaneous
polarization attributes of analytic traces. Computation of the data
eigenstructure is not required and the measure can be used in combination
with its spatial coherence to enhance polarized signals on seismic
record sections. Our approach avoids suppressing signals with spatially
changing characteristics such as happens in the transition to post-critical
reflections or for reflections from laterally varying interfaces.
The simplicity of the method permits the filter to be tailored to
various data characteristics and the concept can be applied to cross-energy
methods. We also show that non-linear amplification of rectilinearity
and planarity weight functions in time-domain principal-component
filters permits the size of data windows to be decreased, improving
resolution and suppressing noise.
Nutzer