TY - SLIDE KW - workshop KW - data assimilation KW - diagnostics KW - systems performance AU - R. Gelaro AU - R. Todling AU - R. Langland AU - Y. Trémolet C1 - Events DA - 2009 LA - eng PY - 2009 TI - Recent developments in the use and understanding of adjoint-derived estimates of observation impact UR - https://www.ecmwf.int/node/15263 ER -