Abstract
A measure of the environmental influence on matched-field processing is the temporal autocorrelation of the coherent acoustic field passing through a vertical aperture. The matched-field autocorrelation times provide estimates of the time interval over which matched-field replica vectors will remain valid. In December 2003 the Naval Research Laboratory moored three vertical arrays at ranges of 10, 20 and 30 km distant from fixed 300- and 500-Hz CW acoustic sources. The purpose of the experiment was to measure the relationship of array gain to shelf break fluid processes (RAGS03). Data was recorded continuously for more than 20 days. Range and time dependent temporal autocorrelation times derived from this data will be presented and compared to similar measurements made at the South China Sea shelf break during the ONR AsiaEx01 acoustic propagation experiment. Preliminary RAGS03 results show that matched-field autocorrelation times are shortened during strong wind events and that sound speed fluctuations caused by semi-diurnal tidal processes forced quarter-diurnal fluctuations in the matched-field processor output. [Work supported by ONR.]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
