Abstract
We perform a comparative analysis of two mechanisms for the formation of a synthetic aperture radar (SAR) image of the ocean, which are related to orbital velocities on the surface. It is shown that the mechanism of fluctuations of the effective density of scatterers, which is commonly accepted at present as the physical basis for the SAR diagnostics of roughness, actually works only in the case of a sufficiently flat swell. In the presence of wind roughness, the dominant role is played by another mechanism, namely, fluctuations of the number of surface elements whose images are randomly shifted and superimposed in the image plane due to orbital velocities. In the case of a developed wind roughness propagated in the azimuthal direction, the power contributions of two above-mentioned mechanisms to the SAR imaging of the ocean differ by about two orders of magnitude.
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REFERENCES
W.R. Alpers and C. L. Rufenach, IEEE Trans. Antennas Propag., 27, No. 5, 685 (1979).
W.R. Alpers, D.B. Ross, and C. L. Rufenach, J. Geophys. Res. C, 86, No. 7, 6481 (1981).
W.R. Alpers and C. Bruening, IEEE Trans. Geosci. Remote Sensing, 24, No. 6, 873 (1986).
M. B. Kanevsky, Radiophys. Quantum Electron., 45, No. 11, 872 (2002).
K. Hasselmann and S. Hasselmann, J. Geophys. Res. C, 96, No. 6, 10713 (1991).
W. J. Plant, W.C. Keller, and A. Cross, J. Geophys. Res. C, 88, No. 14, 9747 (1983).
C. Bruening, in: Proc. Second ERS-1 Symposium, Hamburg, Germany, ESA SP-361 (1994), p. 233.
I. N. Davydan, L. I. Lopatukhin, and V.A. Rozhkov, Wind Roughness in the Ocean [in Russian], Gidrometeoizdat, Leningrad (1985).
P. W. Vachon and J.C. West, IEEE Trans Antennas Propag., 30, No. 3, 568 (1991).
M. B. Kanevsky, IEEE Trans. Geosci. Remote Sensing, 31, No. 5, 1031 (1993).
B.R. Levin, Theoretical Foundations of Statistical Radio Engineering, Vol. 1 [in Russian], Sovetskoe Radio, Moscow (1969).
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Kanevsky, M.B. Mechanisms for the SAR Imaging of the Ocean. Radiophysics and Quantum Electronics 46, 13–19 (2003). https://doi.org/10.1023/A:1023630927413
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DOI: https://doi.org/10.1023/A:1023630927413