Impulse Responses

Figure 3 shows a synthetic dataset comprising six spikes and their impulse responses when the dataset is filtered with three different filters. Convolution of a seismic trace with this dataset will filter it in the time-variant manner implied by the right panel of Figure 3.

 

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Figure 3 Impulse responses. On the left, the input spikes and on the right their corresponding impulse responses.

 

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Figure 4 Random traces. On the top left, the input data. On the top right the filtered data with a ``blocky spectrum,'' that is, constant spectrum in each of three time windows corresponding to one third of the trace length. On the bottom left data filtered with a linear spectrum in the middle third and constant spectrum in the top and bottom third. On the bottom right is the difference of the two filtered datasets.