w3fc08.f File Reference

U-V Comps from Earth to north hem grid. More...

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Functions/Subroutines
subroutine	w3fc08 (ffid, ffjd, fu, fv, fgu, fgv)
	Given the Earth-oriented wind components on a northern hemisphere polar stereographic grid point, compute the grid- oriented components at that point.

Detailed Description

U-V Comps from Earth to north hem grid.

Author

John Stackpole

Date

1981-12-30

Definition in file w3fc08.f.

Function/Subroutine Documentation

w3fc08()

subroutine w3fc08	(		ffid,
			ffjd,
			fu,
			fv,
			fgu,
			fgv
	)

Given the Earth-oriented wind components on a northern hemisphere polar stereographic grid point, compute the grid- oriented components at that point.

Input wind components at the north pole point are assumed to conform to the 'WMO' standards for reporting winds at the north pole, with the output components computed relative to the X-Y axes on the grid. (see office note 241 for WMO definition.)

Program history log:

• John Stackpole 1981-12-30
• P. Chase 1988-10-18 Let output variables overlay input.
• Ralph Jones 1991-03-06 Change to cray cft77 fortran.

Parameters

[in]	FFID	REAL I-displacement from point to north pole in grid units.
[in]	FFJD	REAL J-displacement from point to north pole in grid units.
[in]	FU	REAL Earth-oriented u-component, positive from west.
[in]	FV	REAL Earth-oriented v-component, positive from east.
[out]	FGU	REAL Grid-oriented u-component. May reference same location as FU.
[out]	FGV	REAL Grid-oriented v-component. May reference same location as FV.

Note

FFID and FFJD may be calculated as followS..... FFID = real(ip - i) FFJD = real(jp - j) where (ip, jp) are the grid coordinates of the north pole and (i,j) are the grid coordinates of the point.

Author

John Stackpole

Date

1981-12-30

Definition at line 36 of file w3fc08.f.