TY - CPAPER AU - P.L. Houtekamer AU - H. Mitchell BT - Seminar on Recent developments in data assimilation for atmosphere and ocean, 8-12 September 2003 CY - Shinfield Park, Reading DA - 2003 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2003 SP - 193 EP - 210 T2 - Seminar on Recent developments in data assimilation for atmosphere and ocean, 8-12 September 2003 TI - Practical ensemble data assimilation ER -