Abstract
Mid-frequency (12 kHz) acoustic scattering from the sea surface is analyzed with regard to surface wave shape inversion and receiver array characteristics. The forward scattered data is from the Surface Processes and Communications Experiment (SPACE08). Multipath arrivals representing surface, bottom-surface, and surface-bottom paths are distinguishable, implying that knowledge of the surface is known approximately 1/3, 1/2, and 2/3 the distance between source and receiver. Surface wave shape inversion at those ranges are presented in a variety of environmental conditions and compared to other calculable statistics such as vertical and horizontal array correlation length. The relationship between temporal fluctuations in the intensity of the surface reflected multi-path and array spatial coherence is investigated. To what extent receiver array statistics related to acoustic focusing follows environmental conditions such as wind speed and sea state are considered.
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