> OK, I uploaded at the site below.
Thanks! I just grabbed the file and ran wgrib2 on it and see it is a grib2
file:
wgrib2 avn.2012103000f00.grib2
grib1 message ignored (use wgrib)
grib1 message ignored (use wgrib)
grib1 message ignored (use wgrib)
wgrib avn.2012103000f00.grib2 | head -5
Undefined parameter table (center 7-0 table 255), using NCEP-opn
1:0:d=12103000:UGRD:kpds5=33:kpds6=220:kpds7=0:TR=10:P1=0:P2=0:TimeU=1:planetary
boundary layer (from Richardson no.):anl:NAve=0
...
315:30554548:d=12103000:5WAVA:kpds5=230:kpds6=100:kpds7=500:TR=10:P1=0:P2=0:TimeU=1:500
mb:anl:NAve=0
So it is in fact a grib1 file, which is why NAGRIB worked.
As for decoding the file, dcgrib2 is designed to decode both grib1 and grib2
messages. I ran dcgrib2 avn.gem < avn.2012103000f00.grib2 and now have a 32 Mb
file with 313 grids (via GDINFO):
GEMPAK-GDINFO>l
GDFILE = avn.gem
LSTALL = YES
OUTPUT = T
GDATTIM = all
GLEVEL = all
GVCORD = all
GFUNC = all
GEMPAK-GDINFO>r
GRID FILE: avn.gem
GRID NAVIGATION:
PROJECTION: CED
GRID SIZE: 360 181
LL CORNER: -90.00 0.00
UR CORNER: 90.00 -1.00
GRID ANALYSIS BLOCK:
UNKNOWN ANALYSIS TYPE
Number of grids in file: 313
Maximum number of grids in file: 5000
And with the input to GDCNTR that you sent I produce the attached image which
shows no missing swath around the prime meridian.
Now, after this, I go back to the avn file you sent and run NAGRIB as you
instruct. then I plot the file test.grd with GDCNTR again and see an exact
copy pixel by pixel of the image produce with DCGRIB2 and GDCNTR.
So again, I'm perplexed. We seem to be doing the same thing but getting
different results.
Michael
> Perhaps there is an issue with NAGRIB2 (if it was supposed to be used for
> decoding this file) in which case it would help to track down that error
> perhaps creating the issue.
>
> Thanks.
>
> John
>
Ticket Details
===================
Ticket ID: ZTH-407575
Department: Support GEMPAK
Priority: Normal
Status: OpenAttachment:
avn.gif
Description: GIF image
