20001106: GEMPAK NAGRIB and NCEP reanalysis on gaussian grid

Werner,

No, the decoder cannot handle the gaussian grid.

Since GEMPAK grid programs only handle rectangular grids, the
decoder would first have to interpolate the gaussian points
to a known projection before writing them out.

Steve Chiswell
Unidata User SUpport



>From: Werner Wintels <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200011062112.eA6LC5417026

>
>I am trying to convert GRIB data (NCEP reanalysis on a Gaussian grid 
>from the NCAR mass storage system) to gempak format using NAGRIB in GEMPAK 
>version 5.4. 
>
>The settings are as follows:
>
>
> GBFILE = grb3d89010100
> INDXFL =
> GDOUTF = 8801.01_10.gaussian.gem
> PROJ =
> GRDAREA =
> KXKY =
> MAXGRD =
> CPYFIL = GDS
> GAREA =
> OUTPUT = T
> GBTBLS = 
> GBDIAG =
>
>My understanding is that this should read the grib file header in 
>grb3d89010100, create a gempak file 8801.01_10.gaussian.gem, create a 
>navigation grid corresponding to the grib header, and translate the data 
>accordingly. 
>
>However, I get the following error:
>
>         0 GRIB messages were read or scanned from the GRIB file: 
>     
>grb3d89010100
>         0 grids were written to the GEMPAK file: 
>     
>8801.01_10.gaussian.gem
>
>
>Can the decoder handle the gaussian grid?
>
>
>********************************
>Werner Wintels 
>Atmospheric and Oceanic Sciences
>McGill University    
>Montreal, Canada
>********************************
>