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20051220: Gempak - Some trouble with gdbiint program !

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  • Subject: 20051220: Gempak - Some trouble with gdbiint program !
  • Date: Wed, 21 Dec 2005 10:27:27 -0700
Anh Dao,

The version of GEMPAK you are using is now quite old, and
several GEMPAK changed to grid fdata have occured, so your best bet may be to
upgrade your GEMPAK software.

The current distribution of GEMPAK can do calculations on grids of differing
projections so interpolation may not be necessary. Otherwise, the GEMPAK 
library was
substantially rewritten and GDBIINT was modernized too, so the problem you see 
may be a bug
introduced in the older version when the underlying library was changing.

Steve Chiswell
Unidata User Support


>From: "Anh Dao Nguyen" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200512200907.jBK97WeB029670

>Institution: National Centre for Hydro-Meteorological Forecasting of Vietnam
>Package Version: GEMPAK5.7.4
>Operating System: Linux
>Hardware Information: 40 GB hardware volumn
>Inquiry: Hi all,
>
>I am trying to interpolate from my grid file navigation to avn navigation. My 
> grid file name is 'aveg.grd'
>
>My grid file navigation is:
>
>Projection is CED
>
>Domain= -90.00;0.00;90.00;0.00
>
>KXKY = 145;73
>
>Then I make a GEMPAK grid file that has navigation as avn navigation by gdcfil
>  and choose CPYFIL = $MODEL/2005122000_thin.gem with 'aveint.grd' name
>
>Finally, I use gdbiint to interpolate my navigation to avn navigation as follo
> w:
>
>GDFILE = aveg.grd
>GDOUTF = aveint.grd
>GFUNC  = HGHT
>GLEVEL = 500
>GVCORD = PRES
>GDATTIM = 051129/0000F000
>GDNUM   =
>
>the result is:
>
>Parameters requested: GDFILE,GDOUTF,GFUNC,GLEVEL,GVCORD,GDATTIM,GDNUM.
> GEMPAK-GDBIINT>r
>  Building interpolation array for   289 columns   145 rows
> Input grid file contains  1 grids
> Interpolating 051129/0000F000                    500    -1 PRES
> Parameters requested: GDFILE,GDOUTF,GFUNC,GLEVEL,GVCORD,GDATTIM,GDNUM.
> GEMPAK-GDBIINT>
>
>As you see that it hasn't the name of variable 'HGHT' follow 'Interpolating' c
> haracter. I don't know why? Please help me to interpolate my file with 2.50 r
> esolution into 1.25 resolution (avn resolution). Thank you very much.
>
>With my best regards,
>
>       Anh Dao
>
>
>
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