Inversion Method for Instantaneous SSP Area Difference

Abstract

Addressing the challenge of real-time estimation of instantaneous sound speed profiles (SSP for short). We proposes a SSP inversion method based on the travel time of vertically launched sound waves from seafloor stations to the sea surface. The basic principles of the inversion method are introduced, followed by an investigation into the calculation of instantaneous SSP area considering tidal and wave effects. The proposed method is validated by using semi-experimental data, the results indicate that the accuracy of predictions is poor if the correcting for the tidal and wave influences are not taken. However, after applying the correction equation proposed in this study to adjust for travel time, the relative error in the prediction of SSP area difference is less than 4%.

Keywords:

• SSP area
• seafloor station
• acoustic ray tracing
• acoustic ranging error

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work is supported by China Postdoctoral Science Foundation [2022M723888]; National Natural Science Foundation of China [Grant No. 41931076; 42374012]; National Key Research and Development Program of China [Grant No.2020YFB0505801].