


 Timeshift imaging condition in seismic migration  

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A generalized prestack imaging condition (Sava and Fomel, 2005)
estimates image reflectivity using crosscorrelation in space and time,
followed by image extraction at zero time:
Here,
is a vector describing the spaceshift
between the source and receiver wavefields prior to imaging.
Special cases of this imaging condition
are horizontal spaceshift (Rickett and Sava, 2002) and
vertical spaceshift (Biondi and Symes, 2004).
For computational reasons,
this imaging condition is usually implemented in the
Fourier domain using the expression

(5) 
The sign represents a complex conjugate
applied on the receiver wavefield in the
Fourier domain.



 Timeshift imaging condition in seismic migration  

Next: Timeshift imaging condition
Up: Imaging condition in waveequation
Previous: Imaging condition in waveequation
20130829