1aAO3. Ocean current effects on a low-frequency acoustic field
and the feasibility of their use to monitor ocean dynamics.
Session: Monday Morning, December 2  Time: 10:50  Author: Oleg
A. Godin Location: School of Earth and Ocean Sci., Univ. of
Victoria, P.O. Box 1700, Victoria, BC V8W 2Y2, Canada   Ray-
travel-time nonreciprocity has been used in most tomography
experiments to determine current velocity in the ocean by
acoustic means at distances large compared to ocean depth.
Although very successful in deep water, this approach is not
applicable in the coastal ocean where ray arrivals are not
separable and/or identifiable due to multiple bottom
interactions. In this paper, other parameters of the acoustic
field, including normal mode travel time, ray and mode
horizontal refraction angles, and full field phase, are treated
as possible data for the current velocity field. Some
qualitative differences between acoustic fields in moving and
motionless fluid are indicated and their importance for acoustic
monit