Physical and non-physical energy in scattered wave source-receiver interferometry

Giovanni Angelo Meles*, Andrew Curtis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)3790-3801
Number of pages12
JournalThe Journal of the Acoustical Society of America
Volume133
Issue number6
DOIs
Publication statusPublished - Jun 2013

Keywords / Materials (for Non-textual outputs)

  • ACOUSTIC TRANSMISSION RESPONSE
  • GREENS-FUNCTION RETRIEVAL
  • SEISMIC INTERFEROMETRY
  • REFLECTIONS
  • REPRESENTATIONS
  • ATTENUATION
  • PROPAGATION
  • REMOVAL
  • THEOREM
  • MEDIA

Fingerprint

Dive into the research topics of 'Physical and non-physical energy in scattered wave source-receiver interferometry'. Together they form a unique fingerprint.

Cite this