Abstract
A fast code was written to calculate the effects of a Garrett-Munk internal-wave field on fluctuations in acoustic transmission. Input parameters include acoustic frequency, source depth, ray launch angle, receiver range, and experimental profiles of sound-speed and buoyancy frequency, which are fit by cubic-spline techniques. Output includes ray geometry; time scales for phase and intensity fluctuations; vertical correlation length of the acoustic field; frequency decorrelation bandwidth of the field; descriptions of tails for pulse transmission; whether the ray is in the unsaturated, partially saturated, or fully saturated region; and whether the calculation is valid from the point of view of inhomogeneity and anisotropy effects.
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