w3fc07.f File Reference

Grid U-V to Earth U-V in north hem. More...

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Functions/Subroutines
subroutine	w3fc07 (ffid, ffjd, fgu, fgv, fu, fv)
	Given the grid-oriented wind components on a northern hemisphere polar stereographic grid point, compute the Earth- oriented wind components at that point.

Detailed Description

Grid U-V to Earth U-V in north hem.

Author

John Stackpole

Date

1981-12-30

Definition in file w3fc07.f.

Function/Subroutine Documentation

w3fc07()

subroutine w3fc07	(		ffid,
			ffjd,
			fgu,
			fgv,
			fu,
			fv
	)

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

Program history log:

• John Stackpole 1981-12-30
• P. Chase 1988-10-13 Allow input and output to be the same
• Ralph Jones 1991-03-06 Change to cray cft77 fortran

Parameters

[in]	FFID	REAL I-displacement from point to north pole
[in]	FFJD	REAL J-displacement from point to north pole
[in]	FGV	REAL Grid-oriented V-component
[in]	FGU	REAL Grid-oriented U-component
[out]	FU	REAL Earth-oriented U-component, positive from west may reference the same location as FGU.
[out]	FV	REAL Earth-oriented V-component, positive from south may reference the same location as FGV.

Note

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. See w3fc11 for a southern hemisphere companion subroutine.

Author

John Stackpole

Date

1981-12-30

Definition at line 34 of file w3fc07.f.