Abstract
Most approximate solutions to surface scattering begin with the Kirchhoff approximation to the unknown surface field. The validity of the Kirchhoff approximation is tested in this paper by the use of exact solutions for scattering from a pressure release sinusoid. Rough surfaces are expressed in a Fourier Series, and series solutions for small Rayleigh parameter are derived. The first order series term of Holford, Uretsky and Rayleigh are shown to be identical. Surface radiation patterns for shallow grazing angles are examined and conclusions are drawn on the region of validity of the Kirchhoff approximation.
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References
W. C. Meecham, “On the Use of the Kirchhoff Approximation for the Solution of Reflection Problems,” J. Ration. Mech. Anal. 5, 323–333 (1956).
R. L. Holford, “Scattering of Sound Waves at a Periodic Pressure-Release Surface: An Exact Solution,” J. Acoust. Soc. Am. 70, 1116–1128 (1981).
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W. T. Pierson, “The Theory and applications of ocean wave measuring system at and below the sea surface, on the land, from aircraft and from spacecraft,” NASA Contract Rep CR-2646 NASA, Washington, DC, 305–308 (1976).
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© 1987 Plenum Press, New York
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McCammon, D.F., McDaniel, S.T. (1987). Rough Surface Scattering and the Kirchhoff Approximation. In: Merklinger, H.M. (eds) Progress in Underwater Acoustics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1871-2_7
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DOI: https://doi.org/10.1007/978-1-4613-1871-2_7
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4612-9043-8
Online ISBN: 978-1-4613-1871-2
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