Bottom Backscattering Measured Off the Coast of Oregon During the Littoral Warfare Advanced Development 99-3 Experiment
Abstract
Measurements of backscattering from the ocean bottom were performed in a shallow water environment off the coast of Oregon as part of the Littoral Warfare Advanced Development 99-3 Experiment. Scattering strengths were obtained at 0.4 to 4.5 kHz as a function of the mean grazing angle. For all measurements, the grazing angle dependence was fit adequately by assuming a dependence of scattering strength (dB) on the sine of the mean grazing angle: mu + 10 log (sin theta). At the primary scattering location (Site 1), most scattering strengths were well fit using mu = -25 to -30 dB at low frequencies (400-1000 Hz), and mu = -20 to -30 dB at mid frequencies (1.5-4.5 kHz). Application of physics-based, bistatic models suggest that the dominant scattering mechanisms at grazing angles below approx. 50 deg were the water-sediment interface and near-bottom fish.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 12, 2000
- Accession Number
- ADA378076
Entities
People
- Edward L. Kunz
- Roger C. Gauss
Organizations
- United States Naval Research Laboratory