W3FC07
The W3FC07 routine computes the earth-oriented wind components at
the given grid-oriented wind components on a Northern
hemisphere polar stereographic grid point. If the
input winds are at the North pole, the output components
will be made consistent with the WMO standards for
reporting winds at the North pole.
(see Office Note 241 for WMO definition.)
USAGE: CALL W3FC07 (FFID, FFJD, FGU, FGV, FU, FV)
Input argument list:
FFID - REAL I-DISPLACEMENT FROM POINT TO NORTH POLE
FFJD - REAL J-DISPLACEMENT FROM POINT TO NORTH POLE
FGU - REAL GRID-ORIENTED U-COMPONENT
FGV - REAL GRID-ORIENTED V-COMPONENT
Output argument list:
FU - REAL EARTH-ORIENTED U-COMPONENT, POSITIVE FROM WEST
MAY REFERENCE THE SAME LOCATION AS FGU.
FV - REAL EARTH-ORIENTED V-COMPONENT, POSITIVE FROM SOUTH
MAY REFERENCE THE SAME LOCATION AS FGV.
REMARKS:
Calculate ffid and ffjd as follows:
FFID = REAL(IP - I)
FFJD = REAL(JP - J)
where (ip,jp) is the grid coordinates of the North pole
and (I,J) is the grid coordinates of the point where
fgu and fgv occur.
W3lib.tar |
Library contains Fortran 90 decoder/encoder
routines for GRIB edition 1. (Fortran90)
Date posted: 2/22/2007 |