Portal de Periódicos da CAPES

Relating ocean dynamics and sea state to time‐angle variability of HF waveforms

2004; Acoustical Society of America; Volume: 115; Issue: 5_Supplement Linguagem: Inglês

10.1121/1.4782433

1520-9024

Mohsen Badiey, Stephen E. Forsythe, Michael B. Porter,

Oceanographic and Atmospheric Processes

One of the objectives of the Kauai experiment was a better understanding of the ocean dynamics effects on the propagation of high-frequency acoustic signals. Due to a unique oceanographic feature of the shallow water region near the Pacific Missile Range Facility in Kauai, a bottom mounted vertical line array containing eight elements was deployed with sufficiently small element spacing to measure the acoustic energy near the bottom. Simultaneous environmental parameters including current, temperature and salinity profiles, directional surface wave spectra, as well as the wind speed and direction above the sea surface were measured. High correlation between the environmental variability and the received acoustic signals is observed. To interpret the results broadband PE and Gaussian beam ray tracing models were utilized. Arrival time-angle statistics are correlated with the environmental variability due to ocean dynamics in this region. It is shown that variations of the sea surface dynamics exhibit different statistical effects than those occurring within the water column. [Work supported by ONR-321OA.] a)Paul Hursky, Martin Siderius (SAIC), Jerald Caruthers (USM), William S. Hodgkiss, Kaustubha Raghukumar (SIO), Dan Rouseff, Warren Fox (APL-UW), Christian de Moustier, Brian Calder, Barbara J. Kraft (UNH), Keyko McDonald (SPAWARSSC), Peter Stein, James K. Lewis, and Subramaniam Rajan (SSI).