image of the subsurface. Te notch diversity is designed and
optimised for exploration and production targets, to deliver the best possible resolution to interpreters. Te profile of the cable depth can be tuned for different water depths, target depths and desired output spectra of the wavelet. BroadSeis, therefore, is a data
acquisition technique that widens the seismic band width at both ends of the frequency spect rum by using a single spread of Sentinel cables towed with a variable-depth config ura tion. Starting from the nearest channel, the receiver depth increases with offset, introducing diversity in the receiver ghosts. Tis diversity enables the removal of the receiver ghost.
Figure 5.39: Shot gathers, acquired in marginal weather, show how BroadSeis’ deep tow reduces weather- related noise and so extends the weather window.
