ASA 126th Meeting Denver 1993 October 4-8

5aUW3. Comparison of a parabolic equation model with Gaussian beam tracing in range-independent and range-dependent environments.

Timothy H. Ruppel Robert L. Field

Naval Res. Lab., Stennis Space Center, MS 39529

Transmission losses predicted by the parabolic equation model FEPE over a 20- to 150-Hz frequency band are compared with transmission losses predicted by Gaussian beam tracing in range-independent and downslope environments. Ocean impulse responses, computed with each model, are also compared with experimentally determined responses previously reported. [R. L. Field and J. H. Leclere, J. Acoust. Soc. Am. 93, 2599--2616 (1993)]. As in the earlier paper, environmental inputs to the model are derived from the Ocean Drilling Project (ODP) sites near the experiment location, and impulse response comparisons are made using correlation coefficients. [Work supported by the Office of Naval Research Program Element 0602435, with technical management provided by the Naval Research Laboratory.]