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Research on the spectral width of the X-band radar clutter backscattered from sea surface
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Lijia Ji1, Yanmin Zhang1, *, Yunhua Wang1, 2, Yandong Xu1
Haiyang Xuebao | 2019, 41(7) : 149 - 158
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Haiyang Xuebao | 2019, 41(7): 149-158
• Marine Information Science •
Research on the spectral width of the X-band radar clutter backscattered from sea surface
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Lijia Ji1, Yanmin Zhang1, *, Yunhua Wang1, 2, Yandong Xu1
Affiliations
  • 1 College of Information Science & Engineering, Ocean University of China, Qingdao 266100, China
  • 2 Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
Published: 2019-07-25 doi: 10.3969/j.issn.0253-4193.2019.07.014
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The spectral width of the electromagnetic scattering from sea surface is closely related to the SWH (significant wave height), and thus the spectral width can be used to retrieve the SWH. In this paper, the linear filtering method is employed to simulate the radial velocity of the orbit velocity of the each scattering element on sea surface. Based on the radial velocity, we establish a spectral width model, and analyze the influences of spatial resolution, time sampling length and SWH on spectral width. At the same time, we also discuss how to select the parameters such as time sampling length and the azimuth angle during the actual observation. Here, the theoretical results are compared with the estimated results based on the measured data required by the CSIR-X band radar. The comparisons demonstrate that the spectral width obtained by the estimation method based on Gaussian distribution standard deviation agree well with the theoretical results after eliminating the effects of radar noise and frequency leakage, which proves the reliability of the theoretical results. The results obtained in this paper have certain reference value for the retrieval of the SWH.

sea surface simulation  /  sea clutter  /  Doppler characteristics  /  spectrum width
Lijia Ji, Yanmin Zhang, Yunhua Wang, Yandong Xu. Research on the spectral width of the X-band radar clutter backscattered from sea surface[J]. Haiyang Xuebao, 2019 , 41 (7) : 149 -158 . DOI: 10.3969/j.issn.0253-4193.2019.07.014
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Year 2019 volume 41 Issue 7
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doi: 10.3969/j.issn.0253-4193.2019.07.014
  • Receive Date：2018-07-26
  • Online Date：2026-04-02
  • Published：2019-07-25
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  • Received：2018-07-26
  • Revised：2018-12-26
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Affiliations
    1 College of Information Science & Engineering, Ocean University of China, Qingdao 266100, China
    2 Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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