The small-slope approximation for layered, fluid seafloors
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Authors
Jackson, Darrell
Olson, Derek R.
Subjects
Advisors
Date of Issue
2020-01
Date
January 2020
Publisher
Acoustical Society of America (ASA)
Language
Abstract
The small-slope approximation (SSA) for rough-interface scattering is most commonly applied to the upper bound ary of either impenetrable media or uniform half-space media, but has been recently developed for layered media in
the acoustic and electromagnetic cases. The present work gives an overview of three forms of the SSA for layered
media. The first has been previously presented in the acoustics literature. The second is from the electromagnetics
literature and in the present work is converted to the fluid-sediment problem. A missing proof is supplied of a key
consistency condition demanded of the small-slope ansatz. As is usual, these small-slope results are expressed in
k-space. A third SSA for layered seafloors follows from conversion of the usual half-space formulation from k-space
to coordinate space. This form turns out to be useful for reverberation simulations. The three different approaches
are compared with respect to scattering strength and the coherent reflection coefficient, but an assessment of their
relative merits will require comparison with exact calculations.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1121/10.0000470
Series/Report No
Department
Oceanography
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
U.S. Office of Naval Research
Funding
Format
18 p.
Citation
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.