Accession Number:

ADA634655

Title:

High Resolution Focusing Analysis and Inversion for Small Scatterer Detection

Descriptive Note:

Corporate Author:

COLORADO SCHOOL OF MINES GOLDEN CENTER FOR WAVE PHENOMENA

Personal Author(s):

Report Date:

1997-09-30

Pagination or Media Count:

6.0

Abstract:

LONG-TERM GOAL. The long-term goal of this project is to develop software to invert acoustic data from a towed sourcereceiver array for simultaneous velocity analysis, detection and material characterization of small scale 7 to 15 cm scatterers in the shallow ocean and seabed sediments. Detection will be achieved by providing a reflector map of the target region. Material characterization is provided through estimates of angularly dependent reflection coefficients at the surface of the target over multiple angles angle versus offset analysis provides a basis for characterizing the internal material parameters of the target. SCIENTIFIC AND TECHNOLOGICAL OBJECTIVES. i Develop code to provide an accurate three dimensional image of small scatterers in a seabed whose propagation parameters may have lateral as well as depth-dependent variation. ii Such code should provide sufficiently accurate amplitude information about reflection coefficients that medium characterization aspect of the theory through estimation of its acoustic elastic parameters can be applied here. iii Develop the necessary theory and computer code for velocity analysis for this problem under parallel support of the Mathematics Branch of ONR and other related research at the Center for Wave Phenomena.

Subject Categories:

  • Earth Sciences and Oceanography
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE