NDLI: Time-reversal and MUSIC imaging of objects near rough surface based on surface flattening transform

Content Provider	IEEE Xplore Digital Library
Author	Ce Zhang Ishimaru, A. Kuga, Y.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. Eng., Univ. of Washington, Seattle, WA, USA (Ce Zhang; Ishimaru, A.; Kuga, Y.)
Abstract	Imaging and detection of objects located near rough ocean surface from transmitters to receivers which are also located on ocean surface are important practical problem. This problem is different from usual rough surface scattering including LGA (Low Grazing Angle) scattering, because the incident wave on the surface is neither a beam wave nor a spherical wave, but it is a mixture of the coherent and incoherent waves. Therefore, this needs to be studied on the basis of stochastic rough surface Green Function. Rough Surface Green Function has been obtained for perturbation solution, but it has been difficult for large rough surface heights. We have been considering this problem using the surface flattening transform. Using this transform, Green's function for rough surface is transformed to Green's function for flat surfaces with inhomogeneous random medium. Solutions for the transformed functions have been obtained using path integral and other method for several cases. We made use of the modified Rytov Method, which conserves the power, and obtained rough surface MCF (Mutual Coherence Function). The transformed equation contains the rough surface slope, the RMS height, and the correlation distances. The integral representations in the Rytov solution have been evaluated using asymptotic form and include the surface spectrum.
Sponsorship	IEEE Antennas Propag. Soc.
Starting Page	1
Ending Page	1
File Size	169434
Page Count	1
File Format	PDF
ISBN	9781467347761
e-ISBN	9781467347785
DOI	10.1109/USNC-URSI-NRSM.2013.6525122
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sea surface Surface waves Imaging Transforms Signal processing Surface roughness Rough surfaces
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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