TY - GEN AU - Erik Andersson AU - H Järvinen BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 03/1998 DO - 10.21957/lqz2wn16g LA - eng M1 - 250 PB - ECMWF PP - Shinfield Park, Reading PY - 1998 EP - 31 T2 - ECMWF Technical Memoranda TI - Variational quality control UR - https://www.ecmwf.int/node/7759 ER -