Moving source tomography with controlled source-tow observations

A moving source tomography experiment was conducted in 2016 off the coast of Southern California. From the travel time data extracted from the experiment, ocean sound speed and its uncertainty were estimated. The moving source poses extra complexity and adds components that need to be accounted for in a successful inversion. The sound speed estimation with uncertainties was validated against in situ observations to quantify the efficacy and accuracy of the method. Experimental results and additional simulations suggest that the ray diversity available in the moving source case reduces the posterior sound speed uncertainty compared to the fixed source case. [Work sponsored by the Office of Naval Research.]