[gradsusr] opening amsr-e data in grads

[beas barik]

Dear Sir/Madam,

                         Please could you help us as to how can we open the
following in grads:

I have constructed a ctl file as follows, but I do not know how to set some
values in pdef parameters (for ex. ipole/jpole, lonref), & how to set
XDEF/YDEF values****

** **

DSET ^asi-n6250-20020619-v5i.nc
DTYPE netcdf
TITLE AMSRE daily seaice concentrations at 6250 km resolution
UNDEF 1000
PDEF 1216 1792 nps ipole jpole lonref 6250 -1
XDEF 1216 linear -179.5 1
YDEF 1792 linear -59.5 1
ZDEF 1 linear 1 1
TDEF 1 linear 00Z19jun2002 1Dy
VARS 1
seaicecon=>seaice 0 t,x seaice
ENDVARS****

** **

** **

Corner coordinates of the map are****

         lat -39.23°          lat -39.23°****

         lon 317.76° _______ lon  42.24°****

                     |      |****

         lat -41.45  |      |  lat -41.45°****

         lon 225.00° |______|  lon 135.00°****

** **

** **

The ncdump output of the netcdf file is as follows:****

** **

netcdf asi-n6250-20020619-v5i {****

dimensions:****

      x = 1216 ;****

      y = 1792 ;****

      time = 1 ;****

variables:****

      int latitude(y, x) ;****

            latitude:units = "degrees_north" ;****

            latitude:scale_factor = 1.e-05f ;****

      int longitude(y, x) ;****

            longitude:units = "degrees_east" ;****

            longitude:scale_factor = 1.e-05f ;****

      double time(time) ;****

            time:units = "seconds since 2002-01-01 00:00:00" ;****

      short icecon(time, y, x) ;****

            icecon:units = "%" ;****

            icecon:missing_value = -1000s ;****

            icecon:_FillValue = -1000s ;****

            icecon:scale_factor = 0.1f ;****

** **

// global attributes:****

            :Conventions = "CF-1.0" ;****

            :title = "Daily gridded ARTIST Sea Ice (ASI) Concentration in
percent from AMSR-E 89 GHz data, grid resolution: 6.25 km, ASI Version:
5.6, missing data interpolated" ;****

            :Based_upon = "Spreen et al. data set available at www.seaice.de"
;****

            :Creation_date = "2011-02-17" ;****

            :netCDF_created_by = "Stefan Kern" ;****

            :Created_with = "IDL-routine read_asi_amsre.pro" ;****

            :Date = "20020619" ;****

            :Hemisphere = "n" ;****

data:****

** **

 latitude =****

    3395657, 3398302, 3400944, 3403585, 3406223, 3408859, 3411492, 3414123,*
***

    3416753, 3419379, 3422004, 3424626, 3427246, 3429864, 3432480, 3435093,*
***

    3437704, 3440312, 3442919, 3445522, 3448124, 3450723, 3453320, 3455915,*
***

    3458507, 3461097, 3463685, 3466270, 3468852, 3471433, 3474011, 3476586,*
***

    3479160, 3481730, 3484299, 3486864, 3489428, 3491989, 3494547, 3497103,*
***

    3499657, 3502208, 3504757, 3507303, 3509847, 3512388, 3514927, 3517463,*
***

    3519996, 3522527, 3525056, 3527582, 3530105, 3532626, 3535145, 3537660,*
***

    3540173, 3542684, 3545192, 3547697, 3550200, 3552700, 3555198, 3557693,*
***

    3560185, 3562674, 3565161, 3567646, 3570127, 3572606, 3575082, 3577556,*
***

    3580027, 3582495, 3584961, 3587423, 3589883, 3592340, 3594795, 3597247,*
***

    3599696, 3602142, 3604586, 3607026, 3609464, 3611899, 3614332, 3616761,*
***

    3619188, 3621612, 3624033, 3626451, 3628866, 3631279, 3633689, 3636095,*
***

    3638499, 3640900, 3643298, 3645694, 3648086, 3650475, 3652862, 3655246,*
***

   .........................etc


Thanking you in anticipation.

Yours Sincerely,

Beas Barik.
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