Improvement in the use of an operational constellation of GPS radio...

As of May 2007, the National Centers for Environmental Prediction (NCEP) implemented a new Global Data Assimilation System. This system incorporated the assimilation of global...截至2007年5月，国家环境预报中心（National Centers for Environmental Prediction, NCEP）启用了一套全新的全球数据同化系统（Global Data Assimilation System）。该系统整合了全球……的数据同化流程。