# Translations:Water reverberations/1/en

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The water-reverberation problem in marine seismic operations can be described as follows: Consider just two interfaces — the water surface and the water bottom — with a separation given by the two-way traveltime *T*. The reflectivity is . For definiteness, let us assume that *T* = 3. Then the reflectivity is . The two-sided autocorrelation *g*_{t} of the reflectivity is