Abstract / Description of output
Source-receiver interferometry allows Green's functions between sources and receivers to be estimated by means of convolution and cross-correlation of other wavefields. Source-receiver interferometry has been observed to work surprisingly well in practical applications when theoretical requirements (e. g., complete enclosing boundaries of other sources and receivers) are contravened: this paper contributes to explain why this may be true. Commonly used inter-receiver interferometry requires wavefields to be generated around specific stationary points in space which are controlled purely by medium heterogeneity and receiver locations. By contrast, application of source-receiver interferometry constructs at least kinematic information about physically scattered waves between a source and a receiver by cross-convolution of scattered waves propagating from and to any points on the boundary. This reduces the ambiguity in interpreting wavefields generated using source-receiver interferometry with only partial boundaries (as is standard in practical applications), as it allows spurious or non-physical energy in the constructed Green's function to be identified and ignored. Further, source-receiver interferometry (which includes a step of inter-receiver interferometry) turns all types of non-physical or spurious energy deriving from inter-receiver interferometry into what appears to be physical energy. This explains in part why source-receiver interferometry may perform relatively well compared to inter-receiver interferometry when constructing scattered wavefields. (C) 2013 Acoustical Society of America.
Original language | English |
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Pages (from-to) | 3790-3801 |
Number of pages | 12 |
Journal | The Journal of the Acoustical Society of America |
Volume | 133 |
Issue number | 6 |
DOIs | |
Publication status | Published - Jun 2013 |
Keywords / Materials (for Non-textual outputs)
- ACOUSTIC TRANSMISSION RESPONSE
- GREENS-FUNCTION RETRIEVAL
- SEISMIC INTERFEROMETRY
- REFLECTIONS
- REPRESENTATIONS
- ATTENUATION
- PROPAGATION
- REMOVAL
- THEOREM
- MEDIA