Bottom Backscattering Measured Off the South Carolina Coast During Littoral Warfare Advanced Development Focused Technology Experiment 96-2.
Abstract
Measurements of ocean bottom backscattering were performed in a shallow water environment off the coast of South Carolina as pan of the Littoral Warfare Advanced Development (LWAD) Focused Technology Experiment 96-2 (FTE 96-2). Scattering strengths were obtained at 2, 2.5, 3 and 3.5 kHz as a function of grazing angle. The site dependence arising from the presence or absence of a sandy sediment layer was investigated; the results were consistent with observations of sediment thickness on a seismic track. Scattering strengths in the absence of sediment were on the order of -13 dB and relatively frequency independent, while scattering strengths in the presence of the sediment layer were 15-20 dB lower and showed some frequency dependence, suggesting the influence of attenuation effects within the sediment. The grazing angle dependence could be fit adequately by assuming a dependence of scattering strength on the sine of the grazing angle.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 28, 1997
- Accession Number
- ADA324434
Entities
People
- Peter M. Ogden
- Raymond J. Soukup
Organizations
- United States Naval Research Laboratory