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为考察合成孔径雷达反演海面风场变分模型精度,开展了误差分析试验.在背景场误差为极大值条件下分析场误差低于背景场误差,且随背景场风向增大呈周期性变化;在背景场误差逐渐变大条件下分析场误差逐渐增大,误差偏离方向与背景场误差偏离方向一致;在特定背景场条件下与直接反演模型相比,低风速时反演误差略高,中高风速时反演误差明显较低.总体来讲,变分模型误差小于背景场误差,风速反演误差小于1.60 m/s,风向误差小于17.15°.
In order to investigate the precision of inverse variational model of sea surface wind field by synthetic aperture radar, an error analysis test was carried out.Under the condition that the error of the background field is maximum, the analysis error of the field is lower than the error of the background field and periodicity increases with the wind direction of the background field The error of the analysis field increases gradually when the error of the background field becomes larger and the error deviation direction is consistent with that of the error of the background field. Compared with the direct inversion model, the error of inversion is lower than that of the direct inversion model In general, the variational model error is less than the background error, the wind speed error is less than 1.60 m / s, and the wind direction error is less than 17.15 °.