Beam spreading and loss of spatial coherence in an inhomogeneous and fluctuating ocean
A theory has been developed that enables estimates to be made of beam bending, beam spreading and loss of spatial coherence. In this paper we concentrate on the loss of spatial coherence due to scattering. Using a minus two power law as representative of horizontal tow data the solution predicts that the law of coherence of a signal received by a horizontally positioned line array behaves as I exp(-Ek5/2 ZS 3/2 ). Here I is the signal intensity, E is an environmental parameter, k is the signal wave number, Z is the range and S is the separation distance between receiver hydrophones.
SourceIn: Ocean Acoustic Modelling (SACLANTCEN Conference Proceedings CP-17), Part 6, 1975, pp. 31-1 - 31-10.
McCoy, John J.
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