Acoustic Imaging by Wave Field Extrapolation Part I: Theoretical Considerations
The foussed image at depth level zi+1 is obtained by selecting from the unfocussed image P(zi+1 ) the data around zero travel time.
It is shown that the propsed method is most suitable for media with variable propagation velocities and variable absorption
The practical aspects and an illustrative example of this focusing technique will be given in part II of this paper
KeywordsDepth Level Inverse Filter Acoustic Wave Equation Lateral Velocity Variation Recording Plane
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