1. ECMWF, Shinfield Park, Reading RG2 9AX, UK;
2. KNMI, Postbus 201, 3730 AE, de Bilt, the Netherlands;
3. Météo-France, 42 avenue Coriolis, 31057 Toulouse, France;
4. DLR, Oberpfaffenhofen, D-82234 Wessling, Germany;
5. LMD/IPSL, 91128 Palaiseau, France;
6. ESA/ESTEC, Postbus 299, NL-2200-AG Noordwijk, the Netherlands