Full-waveform adjoint tomography in a multiscale perspective

摘要: We discuss an algorithm to regularize elastic waveform inversions using wavelet-based constructive approximations of the data, synthetic and observed, in models that evolve as part a gradient-based iterative scheme relying on forward adjoint modeling carried out with spectral-element method. For Marmousi model we show how our multiscale inversion proceeds successively from large small scales seismograms, progressive increase complexity resulting model. explore sensitivity surface waves imaging shallow structure. To circumvent cycle skipping designed envelope-misfit function within wavelet-multiscale framework. test approach toy preparation for at full complexity.