In experimental physics disciplines (e.g., particle physics, optics), it is essential to have detailed knowledge of the signal used to investigate or probe a target. For the seismic experiment, exact determination of the input signal has not been addressed to the same extent. In my opinion there are two major reasons for this lack of interest:

In a deterministic perspective, we would understand our seismic data in the following way: First determine the source signal before it enters the sedimentary subsurface, then add absorption and scattering effects due to changes in medium parameters as the wavefield propagates through the earth,...

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