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Cross-correlation function (CCF) between the ocean ambient noise (OAN) fields received at two hydrophones gives estimate of Green's function (GF) between those two hydrophone positions, which helps in the passive estimation of the bottom profile of the ocean called a passive fathometry. Wind generated ambient noises on the ocean surface mostly contribute to the estimation of passive fathometry. According...
An autonomous Underwater Vehicle (AUV) is a self driven vehicle travelling underwater and used for variety of purposes. Sometimes, for proper operation of AUVs, it is important to know where the AUVs are, particularly the depth. Usually depth of AUV is measured using an active technique where a known signal is transmitted and ocean ambient noise (OAN) generated in the ocean is considered as noise...
Biological activity in the ocean is a significant source of ambient noise at higher frequencies. This paper demonstrates a passive technique of shrimp localisation and density estimation using the sharp clicks produced by shrimps. The estimation of the location and the density of shrimps find important application in fisheries. These pre-estimations give an idea about where to fish for the shrimps...
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