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CAI Qingwu; MOU Xiaoheng; GONG Zaize; DU Wenming

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CAI Qingwu，MOU Xiaoheng，GONG Zaize, et al. aaa aaaa aaaa aaaa aaaa aaaa aaa a aaaaaaa aaa aaaa aaaa aaaaa aaaaaa aaaaa aaaaa aaaaaaaa aaaaaaaaaa[J]. Haiyang Xuebao，2026, 48(6)：1–11

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CAI Qingwu，MOU Xiaoheng，GONG Zaize, et al. aaa aaaa aaaa aaaa aaaa aaaa aaa a aaaaaaa aaa aaaa aaaa aaaaa aaaaaa aaaaa aaaaa aaaaaaaa aaaaaaaaaa[J]. Haiyang Xuebao，2026, 48(6)：1–11

Citation:

CAI Qingwu，MOU Xiaoheng，GONG Zaize, et al. aaa aaaa aaaa aaaa aaaa aaaa aaa a aaaaaaa aaa aaaa aaaa aaaaa aaaaaa aaaaa aaaaa aaaaaaaa aaaaaaaaaa[J]. Haiyang Xuebao，2026, 48(6)：1–11

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Received Date: 2026-03-01
Accepted Date: 2026-06-10

Available Online: 2026-06-11

Abstract

Abstract

Sea clutter is a major interference for radar in detecting ocean surface targets, and its intensity and statistical characteristics are jointly constrained by sea state and radar parameters. Focusing on sea clutter intensity (i.e., mean sea surface backscattering coefficient), this paper proposes a near real-time framework for the estimation of global mean sea clutter, which combines multi-source satellite remote sensing sea surface winds with the commonly used geophysical model functions of microwave scatterometry, to achieve higher-precision sea clutter intensity estimation in near real-time and at global scale. Taking the Ku-band and moderate incidence angles as examples, the estimation results are verified using spaceborne scatterometer data from the HY-2 series satellites and the CFOSAT satellite. Consequently, the spatial-temporal distribution and the influencing factors of the relative error in sea clutter estimation are analyzed. The results show that the sea clutter estimations for both VV and HH polarizations are in good agreement with the scatterometer measured data, with relative errors of 1.5～1.8 dB and 2.1～2.4 dB, respectively. The relative error is smaller in summer than in winter, and it is persistently high in low-latitude areas, but varies with seasons in middle and high latitudes. In addition, wind speed and relative wind direction are the main factors modulating the relative error of sea clutter estimation. The model proposed in this paper can be extended to other microwave bands and incidence angles, providing a reliable practical reference for the near real-time estimation of global mean sea clutter.
- Scatterometer,
- Sea clutter Intensity,
- Sea surface winds,
- Backscattering coefficient,
- Near real-time estimation

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References(44)

References

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