[gembud] GDATTIM with precip

[David Knight]

Try
GDATTIM=080307/1200F048:080307/1200F045


> 
> Hey all,
> 
> I'm trying to use GEMPAK to split up the run-total accumulated precip 
> values supplied in the public GEM (Canadian) data into 3-hourly chunks. 
>   I used dcgrib to create GEMPAK grid files of "P45M" and "P48M" from 
> the +f045 and +f048 grib files, then used GDDIAG to create a new GEMPAK 
> grid file, subtracting the two fields, and calling the new grid "P03M"
> 
> I get the following output from GDINFO (run on the new P03M grid):
> 
> NUM	TIME1		TIME2		LEVL1  LEVL2  VCORD  PARM
>    1   080307/1200F048   080307/1200F045     0          NONE  P03M
> 
> Note that this is run with GFUNC=P03M, GLEVEL=0, GVCORD=NONE, GDATTIM=ALL.
> 
> However, I can't get this data to display using GDCNTR or GDPLOT3.  They 
> all complain about the GDATTIM value.  "ALL" is not accepted as a proper 
> value in GDCNTR or GDPLOT3, and listing "last" or even "80307/1200F048" 
> doesn't work either.
> 
> Note that using GDDATTIM=all is the only way to get GDINFO to list the 
> above output.
> 
> Any thoughts on what I might be doing wrong?
> 
> Thanks,
> -Mike Hardiman
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