| Abstrakt: |
An extensive acoustic/seismic propagation experiment has been conducted in shallow water off Panama City, Florida. Using explosives as sources, signals received at hydrophones and geophones were measured. In addition to water column measurements, detailed measurements of the bottom sediments and sub-bottom geology were made using reflection and refraction profiling, cores and grab samples. The experiment provided simultaneously both propagation and environmental data sufficient to permit an analysis of the sensitivity of the propagation to each of those environmental variables and parameters that could be measured either directly or indirectly. This analysis has been carried out, using some 15 environmental variables and parameters, for both the water wave and arrivals traveling in the sea bottom. The sensitivity on these environmental variables is found to be frequency dependent and also to depend on the type of wave constituting a given arrival. Multiple regression model techniques used in the analysis yielded quantitative measures of each variables contribution to the model. [ABSTRACT FROM AUTHOR] |
