TY - CPAPER AU - Adrian Simmons 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 - 1 EP - 28 T2 - Seminar on Recent developments in data assimilation for atmosphere and ocean, 8-12 September 2003 TI - Observations, assimilation and the improvement of global weather prediction - some results from operational forecasting and ERA-40 ER -