The goal of true-amplitude processing is to relate the measured seismic amplitudes to earth reflectivity in an absolute sense. A significant barrier to this longstanding objective has been the difficulty of estimating and removing the source effects from our seismic data. To illustrate the need for this, let us assume the simple model that the data contain reflection coefficients convolved with some source waveform. It is clear that we cannot properly analyze these reflection coefficients without first removing the phase and amplitude effects of the source. Fortunately, geophysicists have been able to extract much useful information through relative amplitude processing...

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