Seismic Interferometry and the Estimation of the Green’s Function Using Gaussian Beams
نویسنده
چکیده
In this study, seismic interferometry is investigated in which the Green’s function is estimated between two receivers by cross-correlation and integration over sources. For smoothly varying source strengths, the dominant contributions for the correlation integral come from the stationary phase directions in the forward and backward directions from the alignment of the two receivers. Gaussian beams can be used to evaluate the correlation integral and concentrates the amplitudes in a vicinity of the stationary phase regions instead of relying on phase interference. Several numerical examples are shown to illustrate how this process works. The use of Gaussian beams for the evaluation of the correlation integral results in stable estimates, and also provides physical insight into the estimation of the Green’s function using seismic interferometry.
منابع مشابه
Seismic interferometry and estimation of the Green’s function using Gaussian beams∗
This study investigates seismic interferometry in which the Green’s function is estimated between two receivers by cross-correlation and integration over sources. For smoothly varying source strengths, the dominant contributions of the correlation integral come from the stationary phase directions in the forward and backward directions from the alignment of the two receivers. Gaussian beams can...
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