Advanced Broadband Acoustic Clutter
Final rept. 1 Nov 2007-31 Oct 2010
PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB
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The performance of active sonar systems in littoral environments is often limited by discrete clutter and diffuse bottom reverberation. Discrete clutter tends to be nearly ubiquitous, but its characteristics have been difficult to predict. It has also been difficult to predict the frequency and angular dependence of the seabed scattering strength, which is important for predicting the time dependence of the background reverberation upon which the clutter highlights are distributed. New measurement techniques were developed that have promising possibilities for use in the survey community including quantifying scattering strength frequency and angular dependence, localizingquantifying clutter discrete scattering, and quantifying seabed reflection which is important for prediction of reverberation, clutter and target echo structure. In addition to measurement techniques modeling advances were made for rapid calculation of clutter and target echo, and a deeper understanding of the impact of seabed range dependence on propagation and clutter.
- Acoustic Detection and Detectors