Abstract
A three-dimensional parabolic approximation model FOR3D has been developed. Its validity has been verified by means of test examples and comparisons. The present implementation of the model has some desirable capabilities, and additional useful ones are under development. A primary advantage of the model is the availability of treating azimuthal coupling. The FOR3D has been used to process environmental data obtained from ocean prediction models. In this report, an FOR3D is used to examine acoustic propagation through a parametric eddy model. Computational results will be presented, and issues relating to three-dimensional effects will be discussed. [Work supported jointly by NUSC and ONR.]
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