ASA 124th Meeting New Orleans 1992 October

2pAO5. Numerical simulation of modal ocean acoustic tomography.

E. C. Shang

Y. Y. Wang

CIRES, Univ. of Colorado/NOAA/Wave Propagation Lab., 325 Broadway, Boulder, CO 80303

Numerical simulation of modal tomography has been conducted at low frequency (f=50 Hz) for the same vertical slices of the ``sampled ocean model'' for which ray tomography is simulated [by M. Jones and T. Georges, in this session]. Modal travel time perturbation data are synthesized using an adiabatic mode theory and also by the modal spectrum of the PE field (MOSPEF) to investigate mode coupling effects. The inversions given by the different methods are compared. [Work supported by NOAA.]