Source signature and static shifts estimations for multi-component ocean bottom data

Correction using cross-correlation

Another way to estimate static shifts is to observe the cross-correlation of traces at different offsets with the zero-offset trace. In this way, the lag time that gives maximum cross-correlation would define the static shifts. The bottom panel of Figure 5 shows the resulting direct arrival after static shifts corrrection using this method.

To maximize alignment around the direct arrival, we perform cross-correlation only in the neighborhood of the HMO time. Comparing the result from using the maximum pulse method and the cross-correlation method, we can see that the former method performs better. The bottom panel of Figure 6 shows the static shift calculated at different offsets by using the cross-correlation method. From the figure, we see that the direct arrival are better lined up in the region of $\pm 1000$ meters for the maximum pulse method.

SS
Figure 6. Static shifts estimated at different offsets (Top) using maximum pulse method and (bottom) cross-correlation method. [ER]

Source signature and static shifts estimations for multi-component ocean bottom data