Following url shows that octet 11 is the NCEP model designator. The WMO header is not enough info to designate model http://www.nco.ncep.noaa.gov/pmb/docs/on388/appendixa.html =============================================================================== Robb Kambic Unidata Program Center Software Engineer III Univ. Corp for Atmospheric Research address@hidden WWW: http://www.unidata.ucar.edu/ ===============================================================================