Reflecting boundary conditions for interferometry by multidimensional deconvolution

Area of Science:

• Acoustics
• Seismology
• Wave propagation

Background:

• Acoustic interferometry uses ambient wavefields to create virtual sources for medium imaging.
• Current methods often introduce artifacts due to non-isotropic illumination, limiting imaging accuracy.
• Existing multidimensional deconvolution (MDD) techniques require separating inward and outward propagating waves.

Purpose of the Study:

• To develop a modified MDD formulation for acoustic interferometry.
• To overcome limitations of current MDD methods in handling omnidirectional wavefields.
• To enable accurate interferometric imaging in the presence of non-isotropic illumination.

Main Methods:

• Modification of the theoretical framework underlying interferometry by MDD.
• Elimination of the need to separate inward and outward propagating wavefields.
• Application of the revised MDD to non-isotropic, omnidirectional wavefields.

Main Results:

• The modified MDD formulation successfully removes illumination-related artifacts.
• The new method is applicable to omnidirectional wavefields, unlike previous formulations.
• Enhanced accuracy in interferometric imaging is achieved.

Conclusions:

• The modified MDD theory advances acoustic interferometry by enabling artifact removal in complex wavefield scenarios.
• This breakthrough promises more robust and accurate subsurface imaging using ambient noise.
• The research expands the applicability of MDD to a wider range of geophysical and acoustical imaging problems.