TY - GEN AU - Sebastien Massart BT - ECMWF Technical Memoranda DA - 10/2018 DO - 10.21957/6gdjcd4j3 LA - eng M1 - 832 PB - ECMWF PY - 2018 T2 - ECMWF Technical Memoranda TI - A new hybrid formulation for the background error covariance in the IFS: Implementation aspects UR - https://www.ecmwf.int/node/18747 ER -