Grads and Grib2 g2ctl.pl Question

Pablo Santos pablo.santos at NOAA.GOV
Mon Jul 28 09:04:20 EDT 2008


Hello:

I have a grb2 file (http://www.srh.noaa.gov/mfl/research/cwarf_test.grb2)
that I create a ctl file for using g2ctl.pl.

The ctl file looks like this:

[nawips at MFL-LW-WRFPOST ~/FIT_CSTAR_Test_data_files]$ cat  cwarf_test.ctl
dset ^cwarf_test.grb2
index ^cwarf_test.grb2.idx
undef 9.999E+20
title cwarf_test.grb2
*  produced by g2ctl v0.0.3h
* griddef=1.1:4:(571 x 591):grid_template=30: Lambert Conformal: (571 x 591)
input WE:SN output WE:SN res 0 Lat1 28.201020 Lon1 279.309660 LoV 315.000000
LatD 28.500000 Latin1 30.000000 Latin2 30.000000 LatSP -90.000000 LonSP
0.000000 North Pole (571
dtype grib2
xdef 571 linear 0 0.1
ydef 591 linear 0 0.1
tdef 17 linear 00Z08jun2008 3hr
zdef 1 linear 1 1
vars 3
DIRPWsfc  0,1,0   10,0,10 ** surface none Primary Wave Direction [deg]
HTSGWsfc  0,1,0   10,0,3 ** surface none Significant Height of Combined Wind
Waves and Swell [m]
PERPWsfc  0,1,0   10,0,11 ** surface none Primary Wave Mean Period [s]
ENDVARS

But this seems to be a preprojected grib2 I am trying to display which means
I need the pdef line added to the ctl file. Is there a way to make the
g2ctl.pl utility do that?  If not, could someone help me figure out for this
particular grid what the pdef line is supposed to look like?

Below is the syntax of what the pdef line I am supposed to add to the ctl
file is supposed to look like. I am trying to figure out what the line is
supposed to look like based on the output of the wgrib2 command below:

[nawips at MFL-LW-WRFPOST ~/FIT_CSTAR_Test_data_files]$ wgrib2 -grid
cwarf_test.grb2
1.1:4:grid_template=30:
       Lambert Conformal: (571 x 591) input WE:SN output WE:SN res 0
       Lat1 28.201020 Lon1 279.309660 LoV 315.000000
       LatD 28.500000 Latin1 30.000000 Latin2 30.000000
       LatSP -90.000000 LonSP 0.000000
       North Pole (571 x 591) Dx 0.000000 m Dy 0.000000 m mode 0

Does anyone know? In any case, if someone can help it would be appreciated.
Thanks.

Pablo

PDEF isize jsize LCCR latref lonref iref jref Struelat Ntruelat slon dx dy
PDEF isize jsize LCC latref lonref iref jref Struelat Ntruelat slon dx dy
Example:  PDEF 103 69 lccr 30 -88 51.5 34.5 20 40 -88 90000 90000
Args:
isize  The size of the native grid in the x direction
jsize  The size of the native grid in the y direction
latref  reference latitude
lonref  reference longitude (in degrees, E is positive, W is negative)
iref  i of ref point
jref  j of ref point
Struelat  S true lat
Ntruelat  N true lat
slon  standard longitude
dx  grid X increment in meters
dy  grid Y increment in meters



More information about the gradsusr mailing list