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Ladder and cross terms in second-order distorted Born approximationIn the strong fluctuation theory for a bounded layer of random discrete scatterers, the second moments of the fields in the second-order distorted Born approximation are obtained for copolarized and cross-polarized fields. The backscattering cross sections per unit area are calculated by including the mutual coherence of the fields due to the coincidental ray paths, and that due to the opposite ray paths, corresponding to the ladder and cross terms in the Feynman diagramatic representation. It is proved that the contributions from ladder and cross terms for the copolarized backscattering cross sections are the same, while the contributions for the cross-polarized backscattering cross sections are of the same order. The bistatic scattering coefficients in the second-order approximation for both the ladder and cross terms are also obtained. The contributions from the cross terms explain the enhancement in the backscattering direction.
Document ID
19850054139
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Jin, Y. Q.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Kong, J. A.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1985
Publication Information
Publication: Journal of Mathematical Physics
Volume: 26
ISSN: 0022-2488
Subject Category
Physics (General)
Accession Number
85A36290
Funding Number(s)
CONTRACT_GRANT: NAG5-270
CONTRACT_GRANT: NSF ECS-82-03390
CONTRACT_GRANT: N00014-83-K-0528
Distribution Limits
Public
Copyright
Other

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