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针对经典分形模型的功率谱在空间波数小于基波波数时不能满足正幂率的问题,提出了一种统计模型和归一化带限Weierstrass分形模型相结合的一维粗糙海面模型,确定了功率谱的闭式解,并且和JONSWAP谱进行了比较,两者吻合较好。在满足Kirchhoff近似的条件下推导改进模型电磁散射系数的闭合解,对统计模型、经典分形模型和改进模型的非相干散射强度系数的角分布进行了比较,具体分析了不同尺度因子、不同分形维数、不同入射频率和风速下改进模型非相干散射强度系数的角分布情况。
Aiming at the problem that the power spectrum of the classical fractal model can not meet the positive power rate when the spatial wavenumber is less than the fundamental wavenumber, a one-dimensional rough sea model combining the statistical model and the normalized band-limited Weierstrass fractal model is proposed, and the power The closed-form solution of the spectrum is compared with that of JONSWAP spectrum. Under the condition of meeting the Kirchhoff approximation, the closed solution of the electromagnetic scattering coefficient of the improved model is deduced. The angular distributions of the incoherent scattering intensity coefficients of the statistical model, the classical fractal model and the improved model are compared. The factors of different scales and different fractal dimensions The angular distribution of the incoherent scattering intensity coefficient for the improved model with different incident frequencies and wind speeds.