GRIB file problems

Sandro Raolil alessandro.raolil at CMCC.IT
Tue Oct 20 11:05:33 EDT 2009


Hi all,

I have some problems to display GRIB files with GrADS.
i know this is a known problem, but pheraphs someone could have some news.
I have 2 GRIB file (Grib 1 version) and using grib2ctl and gribmap (both
directly and after copygb trasformation) I'm not able to plot with GrADS
correctly.


The first file, with command "wgrib -d 1 -V LF.grb", display:

rec 1:34:date 2009071812 UGRD kpds5=33 kpds6=100 kpds7=70 levels=(0,70)
grid=41 70 mb 12hr fcst:
  UGRD=u wind [m/s]
  timerange 0 P1 12 P2 0 TimeU 1  nx -1 ny 73 GDS grid 0 num_in_ave 0
missing 0
  center 74 subcenter 0 process 45 Table 2
  thinned latlon: lat  -90.000000 to 0.000000 by 1.250000  nxny 3447
          long -30.000000 to 60.000000, 3447 grid pts   (-1 x 73) scan 64
mode 128 bdsgrid 1
       2    3    5    6    8    9   11   12   14   16   17   19   20   22
 23
      25   26   28   29   30   32   33   35   36   38   39   40   42   43
 44
      45   47   48   49   50   51   52   54   55   56   57   58   59   60
 60
      61   62   63   64   65   65   66   67   67   68   69   69   70   70
 71
      71   71   72   72   72   73   73   73   73   73   73   73   73
  min/max data -8.53127 57.8437  num bits 10  BDS_Ref -8.53127  DecScale 0
BinScale -3


The second file, with command "wgrib -d 1 -V YM.grb", display:

grib header at record 1: two values of nxny 26331 21275
   LEN 31928 DataStart 14 UnusedBits 11 #Bits 12 nxny 26331
rec 1:0:date 2009071812 GP kpds5=6 kpds6=100 kpds7=950 levels=(3,182)
grid=255 950 mb 9hr fcst:
  GP=Geopotential [m^2/s^2]
  timerange 0 P1 9 P2 0 TimeU 1  nx 21275 ny 1 GDS grid 0 num_in_ave 0
missing 0
  center 85 subcenter 0 process 211 Table 1
  latlon: lat  65.000000 to 0.000000 by 0.500000  nxny 21275
          long -30.000000 to 70.000000 by 0.500000, (21275 x 1) scan 0
mode 128 bdsgrid 1
  min/max data 3016.1 7111.1  num bits 12  BDS_Ref 3016.1  DecScale 0
BinScale 0



Any suggestions?
Thanks
Sandro



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