TY  - GEN
AU  - Leutbecher, Martin
TI  - A reduced rank estimate of forecast error variance changes due to intermittent modifications of the observing network
T2  - ECMWF/Technical Memorandum
VL  - 384
PY  - 2002///
CY  - reading
PB  - ECMWF
KW  - RELATORIOS
KW  - IM
ER  -