... data assimilation model 资料同化模式 data assimilation system 资料同化系统 data bank 资料库 ...
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global data assimilation system 全球资料同化系统
European Land Data Assimilation System 欧洲陆面数据同化系统
Earth Observation Data Assimilation System 观测数据同化系统
and data assimilation system 陆面数据同化系统
Land Data Assimilation System 陆面数据同化系统
Climate data assimilation system 同化系统
GDAS Global Data Assimilation System 全球数据同化系统
four-dimensional variational data assimilation system 四维变分资料同化系统
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。
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。
Considering that the model is traditionally supposed to be exact and only initial data fields are amended in Adjoint Assimilation System (AAS).
鉴于传统的四维资料伴随模式同化系统都是假设模式完全正确仅对初始场进行修正。
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