Hi John, For decoding grib 1 and 2 files, I always recommend using the program "dcgrib2" rather than "nagrib". Unidata added dcgrib2 to the NAWIPS/GEMPAK package some years ago; it was developed to be more robust than the NAGRIB program created by NCEP. I downloaded a 1.0 deg global GFS file and decoded it with the command "dcgrib2 gfs.gem < gfs.t12z.pgrbf12.grib2" I then plotted the 500mb temperature field using GAREA = -21;-150;-21;30 PROJ = STR/90;-105;0 GDFILE = gfs.gem GDATTIM = last GLEVEL = 500 GVCORD = pres GDPFUN = tmpf TYPE = f FINT = 5 FLINE = 30-7 This to confirm that when using dcgrib2 there are no missing data along the boundaries. See attached image. -Michael > Good Morning, > > I am using nagrib (v.6.8.0) to decode GFS 1 x 1 deg global data (360x181). > The settings are as follows > > GBFILE = avn.2012102300f00.grib2 > > INDXFL = > > GDOUTF = dummy.grd > > PROJ = > > GRDAREA = > > KXKY = > > MAXGRD = 3000 > > CPYFIL = #3 > > GAREA = > > OUTPUT = f > > GBTBLS = wmogrib2.tbl;ncepgrib2.tbl;vcrdgrib1.tbl;cntrgrib2.tbl > > GBDIAG = > > PDSEXT = no > > OVERWR = no > > > The resulting GEMPAK file has missing values along the 0 meridian (from > -90N to 90N) but is fine everywhere else (example attached). > > With nagrid, it doesn’t matter which field I look at as they all have > this issue (which also shows up using GDLIST). > > nagrid will not write the grids to a GEMPAK file using any other setting > except CPYFIL=#3 (for example CPYFIL=GDS, GAREA=GRID). > > Thanks. > > John Manobianco > > John Manobianco > Vice President/Business Development > > MESO, Inc. > > 185 Jordan Road > > Troy, NY 12180-7611 > > (518) 283-5169 > > address@hidden > > http://www.meso.com > > > Good Morning, > > I am using nagrib (v.6.8.0) to decode GFS 1 x 1 deg global data (360x181). > The settings are as follows > > GBFILE = avn.2012102300f00.grib2 > > INDXFL = > > GDOUTF = dummy.grd > > PROJ = > > GRDAREA = > > KXKY = > > MAXGRD = 3000 > > CPYFIL = #3 > > GAREA = > > OUTPUT = f > > GBTBLS = wmogrib2.tbl;ncepgrib2.tbl;vcrdgrib1.tbl;cntrgrib2.tbl > > GBDIAG = > > PDSEXT = no > > OVERWR = no > > > The resulting GEMPAK file has missing values along the 0 meridian (from > -90N to 90N) but is fine everywhere else (example attached). > > With nagrid, it doesn’t matter which field I look at as they all have > this issue (which also shows up using GDLIST). > > nagrid will not write the grids to a GEMPAK file using any other setting > except CPYFIL=#3 (for example CPYFIL=GDS, GAREA=GRID). > > Thanks. > > John Manobianco > > John Manobianco > Vice President/Business Development > > MESO, Inc. > > 185 Jordan Road > > Troy, NY 12180-7611 > > (518) 283-5169 > > address@hidden > > http://www.meso.com > > Ticket Details =================== Ticket ID: ZTH-407575 Department: Support GEMPAK Priority: Normal Status: Open
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