Accession Number:

AD1113390

Title:

Physics of 3-D scattering from rippled seabeds and buried targets in shallow water

Descriptive Note:

[Technical Report, Research Report]

Corporate Author:

SACLANT UNDERSEA RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s):

Report Date:

1998-05-01

Pagination or Media Count:

39

Abstract:

The new OASES-3D code developed at MIT is used to investigate the spatial and temporal characteristics of reverberation from rippled seabeds insonified by narrow beam sonars such as the TOPAS parametric source. It is shown that the highly polarized - close to monochromatic - spectral characteristics of ripple fields is associated with a reverberation environment which is highly sensitive to both frequency and insonification aspect relative to the ripples. The study suggests that significant gains in detection performance for buried objects can be achieved by band-limiting the processing to frequencies below an environmentally dependent cut-off frequency. The study also confirms theoretically the intuitive advantage of insonifying the seabed along the ripple direction to reduce monostatic reverberation.

Subject Categories:

  • Acoustic Detection and Detectors
  • Acoustics
  • Acoustic Detection and Detectors
  • Acoustics

Distribution Statement:

[A, Approved For Public Release]