VERCEN

     VERCEN allows the GDGRIB user to specify the contents of bytes 4,
     5, 6, and 26 of the GRIB PDS.  The input is given as follows:

                byte_4/byte_5/byte_6/byte_26

     Values may be omitted in specifying VERCEN.  For example, to omit
     the first and third values, specifying only the second and fourth,
     enter the following:

               /byte_5//byte_26


     If values are omitted, the following defaults are inserted:

               BYTE    Default value           Meaning

                 4           2         Parameter Table Version #
                 5           7         CENTER # (7->NCEP)
                 6           0         Generating Process ID
                26           5         Sub-center (5->HPC)

     See NCEP OFFICE NOTE 388 for more information on how to set these
     parameters.  Below is a table of center numbers that may be used
     in byte number 7 of the PDS.

     ID#                        NAME                          ABBREV
 
     007 US Weather Svc - Nat. Cntrs for Envir. Prediction     NCEP
     008 US Weather Svc - NWS Telecommunications Gateway       NCEP
     009 US Weather Svc - Field Stations                       NCEP
     034 Japanese Meteorological Agency - Tokyo                JMA
     052 US Weather Svc (NCEP/TPC) Nat. Hurricane Cntr - Miami NHC
     054 Canadian Meteorological Service - Montreal            CMS
     057 US Air Force - Global Weather Central                 GWC
     058 US Navy - Fleet Numerical Oceanography Center         FNOC
     059 NOAA Forecast Systems Laboratory - Boulder, CO        FSL
     060 Nat. Center for Atmos. Research (NCAR) - Boulder, CO  NCAR
     074 UK Meteorological Office - Bracknell                  UKMO
     085 French Weather Service - Toulouse                     FWS
     097 European Space Agency (ESA)                           ESA
     098 Eur. Cntr for Medium-range Wthr Frcsts - Reading      ECMWF
     099 DeBilt, Netherlands                                   DEBILT