f Seismic degradation and mispositioning as a function of random and systematic navigation errors

A quantitative analysis has been performed to show the effectof navigation errors on marine seismic data . It is found that in some cases large systematic navigation errors can lead to negligible degradation or mispositioning of the seismic data, though this is case dependent. The analysis accounts for the type and magnitude of the mispositioning error, streamer feather, acquisition parameters and subsurface geology. The effects on the seismic data are reported in terms of stack degradation, error in NMO velocity and misposition of the seismic data.