W3FT05

The W3FT05 routine converts a northern hemisphere 2.5 
           degree lat.,lon. 145 by 37 grid to a polar
           stereographic 65 by 65 grid. The polar
           stereographic map projection is true at 60 deg. North,
           the mesh length is 381 km. and the oriention is
           80 deg. west.

   Input argument list:
      ALOLA     145*37 GRID 2.5 LAT,LON GRID N. HEMI.
                       5365 POINT GRID IS TYPE 29 OR 1D HEX O.N. 84
      LINEAR    1 LINEAR INTERPOLATION , NE.1 BIQUADRATIC
 
   Output argument list:
      APOLA     65*65 GRID OF NORTHERN HEMI.
                       4225 POINT GRID IS TYPE 27 OR 1B HEX O.N. 84
      W1        65*65 SCRATCH FIELD
      W2        65*65 SCRATCH FIELD

REMARKS:
       1. W1 AND W2 ARE USED TO STORE SETS OF CONSTANTS WHICH ARE
          REUSABLE FOR REPEATED CALLS TO THE SUBROUTINE. IF THEY ARE
          OVER WRITTEN BY THE USER, A WARNING MESSAGE WILL BE PRINTED
          AND W1 AND W2 WILL BE RECOMPUTED.
       2. WIND COMPONENTS ARE NOT ROTATED TO THE 65*65 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*65
          GRID (ABOUT 1100 POINTS).
       4. YOU SHOULD USE THE CRAY VECTORIZED VERSION W3FT05V ON THE CRAY
          IT HAS 3 PARAMETERS IN THE CALL, RUNS ABOUT 10 TIMES FASTER. USES
          MORE MEMORY.

 


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

   Date posted: 2/22/2007