Novel Acoustic Scattering Processes for Target Discrimination
Abstract
The grant that expired during FY10 (N000140410075) was part of the Shallow-Water Autonomous Sensing Initiative to improve the reliability of acoustic methods using a wide frequency range and scattering data not necessarily limited to monostatic signatures. The related follow-on grant (N000141010093) that started in mid-FY10 has similar goals. The objective of these grants is to improve the understanding of acoustic scattering processes relevant to man-made objects in the shallow water environment. The current emphasis is on the interpretation of the effects on signatures of placing objects close to an interface. Synthetic aperture sonar, acoustic holographic images, spectral properties of scattering, and bistatic scattering are also examined. Other objectives involve improved understanding and modeling of scattering mechanisms. A multifaceted research approach appears to be advisable because some acoustic strategies may not always be applicable and different strategies may require widely different amounts of time to acquire data for a region of interest. Consequently it appeared to Marston that this project should retain research concerning both low frequency and high frequency sonar technologies. Beginning in FY07, the experimental effort at WSU was shifted to emphasize scaled targets directly relevant to the planning and interpretation of experiments carried out at the NSWC-PCD pond in cooperation with UW-APL. Thus, as explained in the Reports for FY07-09 [1-3], measurements at WSU were extended to include bistatic and monostatic acoustic properties of solid aluminum cylinders in the free field and adjacent to interfaces. This kind of target was selected because experiments at the NSWC pond have used aluminum cylinders of various dimensions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2010
- Accession Number
- ADA542048
Entities
People
- Philip L Marston
Organizations
- Washington State University