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Using GDINFO to view the contents of the file: GDFILE = n0706_21.gem LSTALL = YES OUTPUT = T GDATTIM = all GLEVEL = all GVCORD = all GFUNC = all you'll see that the vertical coordinate is PRES. GDINFO is an invaluable tool for knowing what grids area available for other programs to process. -mj > Sorry, I am using the NARR-a file, which the file size is about 54mb, not > NARR-b. > > That is my problem, I need to figure out what is the vertical coordinate so i > can convert it using the GDVINT program, I thought it was SGMA, since it is > derived from eta. > > Appearantly, it didn't work. > I also checked online to see anybody ran into the same problem. > I didn't see anything about converting NARR data vertical coordinate system > using the GDVINT. > So ... I need some help... > > Bo > > ----- Original Message ----- > From: Unidata GEMPAK Support <address@hidden> > Date: Wednesday, March 3, 2010 14:10 > Subject: [GEMPAK #WZM-382925]: software question > To: address@hidden > Cc: address@hidden > > > Hi Bo, > > > > To begin with, I didn't see any SGMA vertical coordinates in the > > gem file produced from narr-b, which contain only the 3hr sfc > > forecast. I converted the narr-a (analysis) grib file to gem, > > and if you look at it with GDINFO you'll see the grids available > > (also outlined in > > http://nomads.ncdc.noaa.gov/docs/narr_archive_contents.pdf ) > > don't include any with SGMA vertical coordinates. So are you > > sure you're using the correct file with GDVINT? It's > > always a good idea to check the grids in a gem file with GDINFO > > before beginning. > > > > -mj > > > > > Hey: > > > > > > I got the original file from this link: > > > http://nomads.ncdc.noaa.gov/data/narr/200407/20040706/ > > > I wish i can just attach one, it is 54 mb. > > > > > > I used the narr-b_221_20040706_2100_000.grb, 2100Z file, then > > dcgrib2 converted the file just fine. > > > > > > Best Regards, > > > > > > Bo > > > > Ticket Details > > =================== > > Ticket ID: WZM-382925 > > Department: Support GEMPAK > > Priority: Normal > > Status: Open > > > > > > Ticket Details =================== Ticket ID: WZM-382925 Department: Support GEMPAK Priority: Normal Status: Open