Range-Dependent Geoacoustic Inversion Using Equivalent Parameters

Mature geoacoustic inversion technologies such as matched-field inversion may encounter mismatching problems and the difficulty of increasing unknown parameters when the array or source is deployed in a range-dependent environment. Considering the range-dependent environment, this paper concentrates on the inversion using an equivalent range-independent environmental profile with “equivalent parameters” for fast inversion. Furthermore, for the equivalent profile, the effectiveness of different objective functions is studied for different array types such as vertical linear array and horrizontal linear array. Simulation results and Swellex-96 experimental data analysis demonstrate the effectiveness of the inversion method.