TY - CPAPER AU - J. Whittaker BT - ECMWF Workshop on Flow-dependent aspecyts of data assimilation, 11-13 June 2007 CY - Shinfield Park, Reading DA - 2007 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2007 SP - 87 EP - 92 T2 - ECMWF Workshop on Flow-dependent aspecyts of data assimilation, 11-13 June 2007 TI - Impacts of flow-dependent background-error covariances in the NCEP Global Forecast System ER -