A Numerical Scheme Using A Transmutation Approach For Underwater Sound Propagation

Details

• Personal Author:
  Gilbert, Robert P. ; Xu, Yongzhi. ; Wood, David.
• Corporate Authors:
  University of Delaware.
• NOAA Program & Office:
  Sea Grant ; OAR (Oceanic and Atmospheric Research)
• Sea Grant Program:
  DELU (Delaware Sea Grant)
• Description:
  The most difficult aspects of the submersible identification problem come from the way the ocean surface interferes with the propagation of sound off an arbitrary submersible. Because of the difficulties introduced by the ocean boundaries, analytical computation of the far field must be based on some sort of approximation scheme such as using a parabolic approximation, which tends to destroy vertical resolution, or using a truncated form of the model expansion for the Green's function (propagator). Having obtained an approximate far field pattern for various wave numbers and dependencies, one may solve the inverse problem. Finally, the case with an index of refraction which is depth dependent is considered. The numerical transmutation method presented here permits computation of the normal modes of wave propagation in the stratified ocean.
• Keywords:
  Underwater acoustics.
• Series:
  DEL-SG
• Sea Grant Document Number:
  DELU-T-89-003
• Document Type:
  Technical Report
• Funding:
  Grant no. NA86AA-D-SG040
• Rights Information:
  Public Domain
• Compliance:
  Library
• Main Document Checksum:
  urn:sha256:01b4f991bf0044e17c3686893e5c3823270b5427a7176df424c07d5ed8cc3240
• Download URL:
  https://repository.library.noaa.gov/view/noaa/39513/noaa_39513_DS1.pdf
• File Type:
  [PDF - 621.85 KB ]