TY - CPAPER AU - C. Chouinard AU - J. Halle BT - ECMWF/EUMETSAT Workshop on Use of ATOVS Data for NWP Assimilation, 2-5 November 1999 CY - Shinfield Park, Reading DA - 1999 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 1999 SP - 79 EP - 90 T2 - ECMWF/EUMETSAT Workshop on Use of ATOVS Data for NWP Assimilation, 2-5 November 1999 T3 - ECMWF/EUMETSAT Workshop TI - The use of ATOVS data in the CMC 3D variational analysis system: estimation and importance of observation errors ER -