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基于HY-2高度计数据,采用局部线性回归非参数估计方法,利用球谐核函数及局部可调带宽,对70和71周期的交叉点进行海况偏差非参数估计。依据解释方差、海况偏差与有效波高及风速的相关度和模型残差分析,检验评价模型。与相同数据集下的参数模型估计结果进行了分析比对,结果表明:所选定的非参数模型的海况偏差与有效波高和风速的相关度均处于较高水平,说明模型更为有效。在不同纬度段,非参数模型和参数模型各有所长,在北半球高纬度区域,非参数模型表现更优。
Based on the HY-2 altimetry data, a local linear regression non-parametric estimation method was used to estimate the non-parametric sea-state parameters for the intersections of 70 and 71 cycles using the spherical-core function and the locally adjustable bandwidth. According to the variance of interpretation, the correlation between sea-level deviation and effective wave height and wind speed and the model residual analysis, the model is tested and evaluated. The results show that the correlation between the sea-state deviation and the effective wave height and wind speed of the selected non-parametric model is at a high level, which shows that the model is more effective. At different latitudes, the non-parametric model and the parametric model have their own strengths. In the northern hemisphere, the non-parametric model performs better.