W3FT213

The W3FT213 routine converts a northern hemisphere 1.0 degree
            lat.,lon. 361 by 91 grid to a Polar Stereographic
            129 by 85 grid. The Polar Stereographic map projection
            is true at 60 deg. N. , The mesh length is 95.25 km. and
            the oriention is 105 deg. W.
            awips grid 213  National - Conus - double resolution

USAGE:  CALL W3FT213(ALOLA,APOLA,INTERP)

   Input arguments:
      ALOLA  - 361*91 GRID 1.0 DEG. LAT,LON GRID N. HEMI.
               32851 POINT GRID. 360 * 181 ONE DEGREE
               GRIB GRID 3 WAS FLIPPED, GREENWISH ADDED
               TO RIGHT SIDE AND CUT TO 361 * 91.
      INTERP - 1 LINEAR INTERPOLATION , NE.1 BIQUADRATIC

   Output arguments:
      APOLA  - 129*85 GRID OF NORTHERN HEMISPHERE.
               10965 POINT GRID IS AWIPS GRID TYPE 213

   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 129*85 GRID ORIENTATION
       AFTER INTERPOLATION. YOU MAY USE W3FC08 TO DO THIS.

 
W3lib.tar Library contains Fortran 90 decoder/encoder routines for GRIB edition 1. (Fortran90)
Date posted: 2/22/2007