Bottom Backscattering Measured Off the Carolina Coast During the Littoral Warfare Advanced Development System Concept Validation Experiment 97 (LWAD SCV 97)
Abstract
Measurements of ocean bottom backscattering were performed in a shallow water environment off the Carolina coast as part of the Littoral Warfare Advanced Development System Concept Validation Experiment 97 (LWAD SCV 97). Scattering strengths were obtained from 1.5 to 4 kHz as a function of grazing angle. The site dependence arising from the presence or absence of a sandy sediment layer was investigated. Scattering strengths in the deeper areas, where sediment had been scoured by Gulf Stream activity and acoustic interactions with the underlying limestone occurred, were in the range of - 15 to -20 dB with a slight frequency dependence. Scattering strengths in the presence of an acoustically significant (at least 20 m) sediment layer were in the -25 to -30 dB range and showed no clear frequency dependence. 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
- Jun 15, 1998
- Accession Number
- ADA349343
Entities
People
- Raymond J. Soukup
Organizations
- United States Naval Research Laboratory