TY - GEN AU - Martin Leutbecher BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 09/2002 DO - 10.21957/hzg685l6i LA - eng M1 - 384 PB - ECMWF PP - Shinfield Park, Reading PY - 2002 EP - 20 T2 - ECMWF Technical Memoranda TI - A reduced rank estimate of forecast error variance changes due to intermittent modifications of the observing network UR - https://www.ecmwf.int/node/10720 ER -