Determining probability distribution of coherent integration time near 133 Hz and 1346 km in the Pacific Ocean.

Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104-6316, USA.

The Journal of the Acoustical Society of America 2013 Feb

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acoustics (1)

computer (1)

gravitation (1)

motion (1)

ocean (2)

pacific ocean (3)

probability (3)

reproducibility of results (1)

seasons (1)

signal processing, computer- assisted (1)

sound (3)

sound spectrography (1)

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The hypothesis tested is that internal gravity waves limit the coherent integration time of sound at 1346 km in the Pacific ocean at 133 Hz and a pulse resolution of 0.06 s. Six months of continuous transmissions at about 18 min intervals are examined. The source and receiver are mounted on the bottom of the ocean with timing governed by atomic clocks. Measured variability is only due to fluctuations in the ocean. A model for the propagation of sound through fluctuating internal waves is run without any tuning with data. Excellent resemblance is found between the model and data's probability distributions of integration time up to five hours.

Citation

John L Spiesberger. Determining probability distribution of coherent integration time near 133 Hz and 1346 km in the Pacific Ocean. The Journal of the Acoustical Society of America. 2013 Feb;133(2):721-30