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星载雷达波谱仪反演海浪谱的精度研究

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Keywords: 雷达波谱仪,海浪谱,精度指标,能量误差

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Abstract:

介绍了星载雷达波谱仪的观测原理及误差分析模型,并在Hauser等提出的SWIM(seawaveinvestigationandmonitoringbysatellite)的基础上分析了波谱仪反演海浪谱的波长分辨率和角度分辨率。为了减小反演调制谱的波动,在数据处理过程中时域和波数域相邻单元的平均个数分别为10和8个。系统在不同的模式下工作,为了获取20°的角度分辨率,对调制谱平均次数分别取3次(模式1)、7次(模式2)、10次(模式3)。使用解析法和仿真法分析了SWIM工作在模式2时海浪谱观测的能量误差,两种方法的结果一致。对于给定的海浪条件,能量误差小于20%。

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