So the actual background error covariance is the key to success of data assimilation technique.
本文主要目的是建立具有实际运行能力的集合卡尔曼滤波资料同化系统。
Different correlation functions fitting background error covariance are investigated and the results are given.
对于不同的相关函数模型对背景误差协方差的拟合也做了相关分析对比。
Background error covariance is an important part of variational data assimilation system, which is used to spread the observation information to other grid points and vertical levels of the model.
背景误差协方差是变分资料同化系统中的一个重要组成部分，能将观测信息从观测点传播到周围的模式格点和垂直层上。
As for the characters of the Doppler Radar radial velocity data, the single variable background error covariance is used. And the anisotropic covariance function is adopted in the horizontal plane.
其根据多普勒雷达径向速度资料的特点，水平方向采用非各向同性的单变量背景场误差协方差函数。
As for the characters of the Doppler Radar radial velocity data, the single variable background error covariance is used. And the anisotropic covariance function is adopted in the horizontal plane.
其根据多普勒雷达径向速度资料的特点，水平方向采用非各向同性的单变量背景场误差协方差函数。
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