TY - GEN AU - J. Pailleux BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 02/1989 DO - 10.21957/9xbizdyhj LA - eng M1 - 150 PB - ECMWF PP - Shinfield Park, Reading PY - 1989 EP - 23 T2 - ECMWF Technical Memoranda TI - Design of a variational analysis: Organisation and main scientific points. Computation of the distance to the observations UR - https://www.ecmwf.int/node/11468 ER -