W3FT06
The W3FT06 routine converts a southern 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. south, the mesh length is 381 km. and
the oriention is 260 deg. west (100E).
USAGE: CALL W3FT06(ALOLA,APOLA,W1,W2,LINEAR)
Input variables:
ALOLA 145*37 DEG 2.5 LAT,LON GRID S. HEMI.
5365 POINT GRID IS TYPE 30 OR 1E HEX O.N. 84
LINEAR 1 LINEAR INTERPOLATION , NE.1 BIQUADRATIC
Output variables:
APOLA 65*65 GRID OF SOUTHERN HEMI.
4225 POINT GRID IS TYPE 28 OR 1C HEX O.N. 84
W1 65*65 SCRATCH FIELD
W2 65*65 SCRATCH FIELD
FT06F001 ERROR MESSAGE
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 W3FC10 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 VERION W3FT06V ON THE CRAY
IT HAS 3 PARAMETERS IN THE CALL, RUNS ABOUT TIMES FASTER, USES
MORE MEMORY.
W3lib.tar |
Library contains Fortran 90 decoder/encoder
routines for GRIB edition 1. (Fortran90)
Date posted: 2/22/2007 |