A strategy for operational implementation of 4D‐Var, using an incremental approachPhilippe Courtier, A. Hollingsworth, Jean‐Noël Thépaut|Quarterly Journal of the Royal Meteorological Society|1994Cited by 1.5k
The ECMWF implementation of three‐dimensional variational assimilation (3D‐Var). III: Experimental resultsErik Andersson, Jean‐Noël Thépaut, Jan Haseler et al.|Quarterly Journal of the Royal Meteorological Society|1998Cited by 142