@phdthesis{74200, author = {G. Desroziers and L. Berre and B. Chapnik}, title = {Objective validation of a data assimilation system: diagnosing sub-optimality}, year = {2009}, journal = {ECMWF Workshop on Diagnostics of data assimilation system performance, 15 - 17 June 2009}, pages = {15-25}, month = {2009}, publisher = {ECMWF}, address = {Shinfield Park, Reading}, language = {eng}, }