TY - GEN AU - Mike Fisher BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 12/2004 DO - 10.21957/ohuva4avu LA - eng M1 - 447 PB - ECMWF PP - Shinfield Park, Reading PY - 2004 EP - 12 T2 - ECMWF Technical Memoranda TI - On the equivalence between Kalman smoothing and weak-constraint four-dimensional variational data assimilation. UR - https://www.ecmwf.int/node/9415 ER -