[gradsusr] Multiple netcdf files in one control file

[mehwish ramzan]

Dear GrADS community,

I am trying to merge multiple netcdf files into one control file so that i
can calculate the climatology of 25 years. The data is available in decadal
format like this;

 cru_ts3.21.1971.1980.tmp.dat.nc
 cru_ts3.21.1981.1990.tmp.dat.nc
 cru_ts3.21.1991.2000.tmp.dat.nc
 cru_ts3.21.1991.2000.tmp.dat.nc

while the information of one .nc file is as;

 File 1 : CRU TS3.21 Mean Temperature

  Descriptor: cru_ts3.21.1971.1980.tmp.dat.nc

  Binary: cru_ts3.21.1971.1980.tmp.dat.nc

  Type = Gridded

  Xsize = 720  Ysize = 360  Zsize = 1  Tsize = 120

  Number of Variables = 1

    tmp 0 -999 near-surface temperature

By following some previous posts regarding same issue, according to my
understanding i prepared one ctl file which can be used as a combination of
above four separate files. The .ctl file is as follows;

DSET  cru_ts3.21.%x31.%x30.tmp.dat.nc

OPTIONS template

DTYPE netcdf

XDEF 720 linear -89.75 89.75

YDEF 360 linear 0 360

ZDEF   1 linear 1000

TDEF 480 linear jan1971 1mo

vars 1

tmp 0  99 near-surface temperature

endvars


But when i tried to open this control file. It give error message;

Invalid variable record

  --> The invalid description file record is:

  --> tmp 0 -999 near-surface temperature

  The data file was not opened.

I know i am making mistake in preparing ctl file  but i don't know how to
put right information ?

Please help me in solving this issue.


Thank You


With Best Regards,


Mehwish
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