[gradsusr] Extract data from .ctl and .dat file

[Usha Verma]

Dear Users
>*I am using ARW post to create .ctl and .dat files for the GrADS.
*>*Now I want to extract some parameters from the .dat file for some particular
*>
*locations.**I am giving the .ctl file for your reference.dset ^dom3.dat
*>*options byteswapped
*>*undef 1.e30
*>*title OUTPUT FROM WRF V3.2.1 MODEL
*>*pdef 129 144 lcc 31.672 78.135 65.000 72.500 30.00000 10.00000
77.00000 9000.000
*>*9000.000
*>*xdef 331 linear 71.47070 0.04054054
*>*ydef 306 linear 25.33539 0.04054054
*>*zdef 19 levels
*>*1000.00000
*>*950.00000
*>*900.00000
*>*850.00000
*>*800.00000
*>*750.00000
*>*700.00000
*>*650.00000
*>*600.00000
*>*550.00000
*>*500.00000
*>*450.00000
*>*400.00000
*>*350.00000
*>*300.00000
*>*250.00000
*>*200.00000
*>*150.00000
*>*100.00000
*>*tdef 41 linear 00Z26OCT2010 180MN
*>*VARS 27
*>*LU_INDEX 1 0 LAND USE CATEGORY (-)
*>*U 19 0 x-wind component (m s-1)
*>*V 19 0 y-wind component (m s-1)
*>*W 19 0 z-wind component (m s-1)
*>*PH 19 0 perturbation geopotential (m2 s-2)
*>*PHB 19 0 base-state geopotential (m2 s-2)
*>*T 19 0 perturbation potential temperature (theta-t0) (K)
*>*MU 1 0 perturbation dry air mass in column (Pa)
*>*MUB 1 0 base state dry air mass in column (Pa)
*>*P 19 0 perturbation pressure (Pa)
*>*PB 19 0 BASE STATE PRESSURE (Pa)
*>*T2 1 0 TEMP at 2 M (K)
*>*TH2 1 0 POT TEMP at 2 M (K)
*>*PSFC 1 0 SFC PRESSURE (Pa)
*>*U10 1 0 U at 10 M (m s-1)
*>*V10 1 0 V at 10 M (m s-1)
*>*LANDMASK 1 0 LAND MASK (1 FOR LAND, 0 FOR WATER) (-)
*>*VEGFRA 1 0 VEGETATION FRACTION (-)
*>*SST 1 0 SEA SURFACE TEMPERATURE (K)
*>*HGT 1 0 Terrain Height (m)
*>*TSK 1 0 SURFACE SKIN TEMPERATURE (K)
*>*RAINC 1 0 ACCUMULATED TOTAL CUMULUS PRECIPITATION (mm)
*>*RAINNC 1 0 ACCUMULATED TOTAL GRID SCALE PRECIPITATION (mm)
*>*XLAT 1 0 LATITUDE, SOUTH IS NEGATIVE (degree_north)
*>*XLONG 1 0 LONGITUDE, WEST IS NEGATIVE (degree_east)
*>*TMN 1 0 SOIL TEMPERATURE AT LOWER BOUNDARY (K)
*>*PBLH 1 0 PBL HEIGHT (m)
*>

*ENDVARS*


*I am new in this field please suggest me how can i extract my data
from this file*




*Regards*

*Usha*
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