Motion parameter estimation of multitonal sources with a single hydrophone

In this letter, a method is proposed to estimate the motion parameters of a multitonal source with a single hydrophone when only the acquisition time of the pressure field is known. Source motion parameters, including the time of closest point of approach (tCPA) and the ratio of the range at the closest point of approach to the source speed ( r CPA / v) are obtained by correlation of two resampled tonal signals. Only two tones emitted by the same source and a value of the waveguide invariant are required. The proposed method is validated by simulation and data from the SWellEx-96 experiment.