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电信和无线电工程
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN 打印: 0040-2508
ISSN 在线: 1943-6009

卷:
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电信和无线电工程

DOI: 10.1615/TelecomRadEng.v59.i5-6.50
16 pages

Power Spectra of Radar Echoes from a Perturbed Sea Surface at Small Grazing Angles

V. G. Gutnik
2Institute of Radio Astronomy, National Academy of Sciences of Ukraine, 4 Mystetstv St., Kharkiv 61002, Ukraine
G. P. Kulemin
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085
L. I. Sharapov
Institute of Radio Astronomy, National Academy of Sciences of Ukraine 4, Krasnoznamennaya St., Kharkov 61002, Ukraine
N. V. Gorbach
Radioastronomical Institurte, National Academy of Sciences of Ukraine 4, Krasnosnamennaya St., Kharkov 61002, Ukraine

ABSTRACT

Power spectra of the radar signals scattered by the sea at 1 to 150GHz are analyzed. Relations between the spectrum parameters and the radar operating frequency, wind speed and sea wave height are discussed. The power spectra measured at the frequency of 140GHz are presented. As has been found, millimeter wave power spectra produced by breaking sea waves are bimodal. Relations between the second mode parameters and sea roughness are analyzed, leading to the conclusion that the second mode is produced by scattering from the water-drop fraction (splashes) which is formed as a result of sea wave breaking.


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