Accession Number:

ADA229857

Title:

Computer Modeling of Direct Path, Backscattered Bottom Reverberations for the Acoustic Reverberation Special Research Program (ARSRP)

Descriptive Note:

Final rept.

Corporate Author:

NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS

Personal Author(s):

Report Date:

1990-10-01

Pagination or Media Count:

70.0

Abstract:

The BottomSubbottom Special Research Project of the Acoustic Reverberation Special Research Program ARSRP is planning to collect, and later interpret the low-frequency 50-500 Hz, low-grazing angle or - 15 deg backscattered bottomsubbottom reverberation data in the Atlantic natural laboratory. Although the specific location of the nature laboratory has not been decided, it will be located between the Bermuda Rise and the Mid-Atlantic Ridge MAR. We have modeled the quasi-monostatic, bottom surface reverberation responses for different bathymetric profiles, within the above mentioned general area of the Atlantic natural laboratory, in order to facilitate the design of the reverberation experiment planned in FY93. The study of the reverberation field for the ARSRP objectives has been divided into three distinct ranges long, intermediate, and short. The intermediate scale is set at a range of approximately 12 of a convergence zone distance. The long ranges are of the order of 1000 km, and the short range is close enough to the scattering region 5x5 km squared to study the scattering process as close to its source as possible. The short range studies correspond to the direct or pure pure path reverberations. The direct path defines the propagation paths that preclude interaction with the sea surface and minimize the effect of bulk variability with in the water column. The modeled reverberation studies described here are for the short range situations. Consequently, the bottom reverberations are simulated for the sensors located close to the reverberation patch 5x5 km area .

Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE