Abstract
Amplitude and time fluctuations of direct and refracted paths measured during a field test near San Clemente Island in August 2002 are presented. Signals used include 20 and 40 kHz CW pulses with 0.14 ms and 1.0 ms durations. The transmitters were suspended from a buoy with a bungee section in the mooring to minimize the watch circle. The receive hydrophone array was suspended from a research vessel in a three point moor. The source to receiver separation was 714 m. Towed CTD data, also collected during the experiment, is presented. A relationship between the amplitude and phase fluctuation in the acoustic arrivals and temperature variations in the water column is developed and compared to existing theory. Acoustic signals will be analyzed using a matched filter, fluctuations will be computed in normalized level and variance of time of arrival. Temperature variations will be computed as mean-square fluctuations of the index of refraction. Other physical mechanisms contributing to acoustic fluctuations including source/receiver motion, turbulence, and internal waves are also investigated.
Sign-in/Register to access full text options 
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.
