W3FT202

The W3FT202 routine converts a northern hemisphere 1.0 degree 
            lat.,lon. 361 by 91 grid to a polar stereographic 65 by
            43 grid. The polar stereographic map projection is true
            at 60 deg. N., The mesh length is 190.5 km. and the
            oriention is 105 deg. W.

USAGE:  CALL W3FT202(ALOLA,APOLA,INTERP)

   Input arguments:
      ALOLA  - 361*91 GRID 1.0 LAT,LON GRID N. HEMISPHERE
               32851 POINT GRID IS O.N. 84 TYPE ?? OR ?? HEX
      INTERP - 1 LINEAR INTERPOLATION , NE.1 BIQUADRATIC

   Output arguments: 
      APOLA - 65*43 GRID OF NORTHERN HEMISPHERE.
              2795 POINT GRID IS AWIPS GRID TYPE 202

   Input files:  NONE

   Output files: ERROR MESSAGE TO FORTRAN OUTPUT FILE

REMARKS:
    1. W1 AND W2 ARE USED TO STORE SETS OF CONSTANTS WHICH ARE
       REUSABLE FOR REPEATED CALLS TO THE SUBROUTINE.
 
    2. WIND COMPONENTS ARE NOT ROTATED TO THE 65*43 GRID ORIENTATION
       AFTER INTERPOLATION. YOU MAY USE W3FC08 TO DO THIS.
 
    3. THE GRID POINTS VALUES ON THE EQUATOR HAVE BEEN EXTRAPOLATED
       OUTWARD TO ALL THE GRID POINTS OUTSIDE THE EQUATOR ON THE 65*43
       GRID (ABOUT 1100 POINTS).

 


  
W3lib.tar
  
Library contains Fortran 90 decoder/encoder
   routines for GRIB edition 1. (Fortran90) 

   Date posted: 2/22/2007