Research on the spectral width of the X-band radar clutter backscattered from sea surface

Ji Lijia; Zhang Yanmin; Wang Yunhua; Xu Yandong

doi:10.3969/j.issn.0253-4193.2019.07.014

Volume 41 Issue 7

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Ji Lijia，Zhang Yanmin，Wang Yunhua, et al. 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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Research on the spectral width of the X-band radar clutter backscattered from sea surface

doi: 10.3969/j.issn.0253-4193.2019.07.014

Ji Lijia^1
,,
Zhang Yanmin^{1
,
,},
Wang Yunhua^{1, 2},
Xu Yandong¹

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

Received Date: 2018-07-26
Rev Recd Date: 2018-12-26

Available Online: 2021-04-21

Publish Date: 2019-07-25

Abstract

Abstract

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

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References(21)

References

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