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[GEMPAK #FYW-889767]: Help with using dcgrib2 to decode AMPS model output

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  • Subject: [GEMPAK #FYW-889767]: Help with using dcgrib2 to decode AMPS model output
  • Date: Fri, 07 Apr 2006 10:58:23 -0600
> 
> Thanks! There are three different grids (I did not know this until I started 
> filing them instead of decoding).
> 
> I have attached a ugrd sample from each.
> 
> 

Robert,

The projection problem stems back to a "fix" I made 4 years ago for a broken 
grid #220 product in NOAAPORT:
http://www.unidata.ucar.edu/support/help/MailArchives/gempak/msg02666.html

If I remove the references to hemflag in $GEMPAK/source/gemlib/gb/gbpolr.c 
which I
introduced at that time, I get what appears to be a proper Antarctic projection.
If you have the source, you can make that change locally, or I'' send you new 
nagrib/dcgrib2
binaries if you need.

As noted in the support reference above, GEMPAK had the code right, but I was 
trying to
make a bad product in the data stream work.

I'll back out that change, and see if I can get a grid #220 product in the 
current data stream 
to see if anything there has changes in the last 4 years!

Steve Chiswell
Unidata User Support

Ticket Details
===================
Ticket ID: FYW-889767
Department: Support GEMPAK
Priority: High
Status: Closed