w3ft05.f File Reference

Convert (145,37) to (65,65) n. More...

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Functions/Subroutines
subroutine	w3ft05 (alola, apola, w1, w2, linear)
	Convert a northern hemisphere 2.5 degree lat.,lon.

Detailed Description

Convert (145,37) to (65,65) n.

hemi. grid

Author

Ralph Jones

Date

1985-04-08

Definition in file w3ft05.f.

Function/Subroutine Documentation

w3ft05()

subroutine w3ft05	(	real, dimension(145,37)	alola,
		real, dimension(4225)	apola,
		real, dimension(4225)	w1,
		real, dimension(4225)	w2,
			linear
	)

Convert 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. n. , The mesh length is 381 km. and the oriention is 80 deg. w.

Program History Log:

Date	Programmer	Comment
1985-04-08	Ralph Jones	Initial.
1991-07-30	Ralph Jones	convert to cray cft77 fortran.
1992-05-02	Ralph Jones	add save.

Parameters

[in]	ALOLA	145*37 grid 2.5 lat,lon grid n. hemi. 5365 point grid is type 29 or 1d hex o.n. 84
[in]	LINEAR	1 linear interpolation , ne.1 biquadratic
[out]	APOLA	65*65 grid of northern hemi. 4225 point grid is type 27 or 1b hex o.n. 84
[out]	W1	65*65 scratch field
[out]	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.

Author

Ralph Jones

Date

1985-04-08

Definition at line 40 of file w3ft05.f.