TY - GEN AU - P. Emmrich AU - P.W. Kållberg BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 12/1985 DO - 10.21957/5khio4ctt LA - eng M1 - 114 PB - ECMWF PP - Shinfield Park, Reading PY - 1985 EP - 19 T2 - ECMWF Technical Memoranda TI - Statistical assessment of an observing system experiment based on frequency distributions of 500 hPa differences UR - https://www.ecmwf.int/node/9290 ER -