four-dimensional variational data assimilation 四维变分同化 ; 四维变分资料同化
three-dimensional variational data assimilation 三维变分同化系统
3-dimensional variational data assimilation 三维变分资料同化
four-dimensional variational data assimilation system 四维变分资料同化系统
Furthermore, the conventional observations are done in the MM5 model system, and a four-dimensional variational data assimilation test is made based on observed data.
最后对MM5伴随模式系统进行了梯度检验，并利用实际资料进行四维变分资料同化试验。
The key problem of four-dimensional variational data assimilation method, which solves the constraining numerical predict equations through accompanied model, is how to establish an accompanied model.
应用伴随方法求解以数值预报方程作为约束条件的四维变分资料同化方案，关键问题是如何构造伴随模式。
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