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20010314: From netCDF to gempak

>From: Lodovica Illari <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200103141850.f2EIoYL09674

>Hi,
>
>I have some reanalysis data in netCDF format.  I would like to make a
>gempak file from that? We are running gempak5.4 and we don't have
>dcreanal. Can you give us a patch? 
>
>Thanks for your help
>
>Lodovica Illari
>


Lodovica,

There is a source tarfile for 5.4 in the gbuddy ftp account:
ftp to ftp.unidata.ucar.edu
login: gbuddy
password: XXXXXX

cd nawips-5.4/contrib
get dcreanal.tar.Z


The installation instructions are in the archives at:
http://www.unidata.ucar.edu/projects/coohl/mhonarc/MailArchives/gempak/msg02840.html

You will need to have NetCDF library installed on your system and make sure that
the NETCDF and NETCDFINC definitions in Makeinc.common are set appropriately.


The dcreanal program does not know how to deal with the reanalysis data
on Gaussian grids.

Since there can be many times in a NetCDF file, and you are limited to
1000 times in a grid file, I generally suggest monthly GEMPAK output
since 365 days x 4 analysis per day exceeds 1000.

Execution example:
dcreanal slp.1948.nc YYYYMM_slp.gem

The above reads from the NetCDF file slp.1948.nc and writes to monthly
Gempak files using the YYYYMM template.

Steve Chiswell