w3fb00.f File Reference

Convert latitude, longitude to i,j. More...

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Functions/Subroutines
subroutine	w3fb00 (alat, along, xmeshl, xi, xj)
	Converts the coordinates of a location on earth from the natural coordinate system of latitude/longitude to the grid (i,j) coordinate system overlaid on the polar stereographic map pro- jection true at 60 n.

Detailed Description

Convert latitude, longitude to i,j.

Author

A. Heermann

Date

1969-08-01

Definition in file w3fb00.f.

Function/Subroutine Documentation

w3fb00()

subroutine w3fb00	(		alat,
			along,
			xmeshl,
			xi,
			xj
	)

Converts the coordinates of a location on earth from the natural coordinate system of latitude/longitude to the grid (i,j) coordinate system overlaid on the polar stereographic map pro- jection true at 60 n.

a preferable, more flexible subroutine to use is w3fb04(). w3fb00() is the reverse of w3fb01().

Program history log:

• A. Heermann 1969-08-01
• Ralph Jones 1990-08-31 Convert to cray cft77 fortran

Parameters

[in]	ALAT	Latitude in deg. (-20.0 (s. hemis)) alat) 90.0).
[in]	ALONG	West longitude in degrees.
[in]	XMESHL	Mesh length of grid in kilometers at 60n.
[out]	XI	I of the point relative to north pole.
[out]	XJ	J of the point relative to north pole.

Note

The grid used in this subroutine has its origin (i=0,j=0) at the north pole, so if the user's grid has its origin at a point other than the north pole, a translation is required to get i and j. The subroutine grid is oriented so that longitude 80w is parallel to the gridlines of i=constant. The radius of the earth is taken to be 6371.2 km. All parameters in the call statement must be real this code will not vectorize on a cray. You will have put it line to vectorize it.

Author

A. Heermann

Date

1969-08-01

Definition at line 31 of file w3fb00.f.