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DCL:MATH£²:SHTLIB: Spherical Harmonic Function: Explanation of Subroutines

4.3.21 SHTSGJ

1.
Function
Performs inverse spectral transformation by successively carrying out SHTSWJ and SHTWGJ, over a specified wavenumber interval on a single specified meridian circle.

2.
Definition
See SHTSWJ and SHTWGJ.

3.
Call
SHTSGJ(MM,JM,IM,ISW,J,M1,M2,S,WJ,GJ,WORK)

4.
Explanation of Parameters
MM (I) Input parameter. The cut-off wavenumber (M).
JM (I) Input parameter. 1/2 of the NS partition number (J)
IM (I) Input parameter. 1/2 of the EW partition number (I)
ISW (I) Input parameter. Specifies the type of transformation (See SHTS2G.)
J (I) Input parameter. Specifies the meridian circle on which to perform transformation. (See SHTSWJ.)
M1 (I) Input parameter. The minimum value of the wavenumber interval for transformation. (See SHTSWJ.)
M2 (I) Input parameter. The maximum value of the wavenumber interval for transformation. (See SHTSWJ.)
S (R) Input parameter. Spectral data. (For length and arrangement, see SHTNML.)
WJ (R) ½ÐÎÏ. Wm(&phi j) (For length and arrangement, see SHTSWJ.)
GJ (R) Output parameter. Grid data. (For length and arrangement, see SHTWGJ.)
WORK (R) Working area initialized by SHTINT.

5.
Notes
(a)
This subroutine is equivalent to successively calling SHTSWJ and SHTWGJ.