spsynth.f File Reference

Synthesize Fourier coefficients from spectral coefficients. More...

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Functions/Subroutines
subroutine	spsynth (i, m, im, ix, nc, nctop, km, clat, pln, plntop, mp, spc, spctop, f)
	Synthesizes Fourier coefficients from spectral coefficients for a latitude pair (Northern and Southern hemispheres).

Detailed Description

Synthesize Fourier coefficients from spectral coefficients.

Program History Log

Date	Programmer	Comments
91-10-31	Mark Iredell	Initial.
1998-12-18	Mark Iredell	Include scalar and gradient option.

Author

Iredell

Date

92-10-31

Definition in file spsynth.f.

Function/Subroutine Documentation

spsynth()

subroutine spsynth	(		i,
			m,
			im,
			ix,
			nc,
			nctop,
			km,
			clat,
		real, dimension((m+1)*((i+1)*m+2)/2)	pln,
		real, dimension(m+1)	plntop,
		integer, dimension(km)	mp,
		real, dimension(nc,km)	spc,
		real, dimension(nctop,km)	spctop,
		real, dimension(ix,2,km)	f
	)

Synthesizes Fourier coefficients from spectral coefficients for a latitude pair (Northern and Southern hemispheres).

Vector components are divided by cosine of latitude.

Parameters

I	spectral domain shape (0 for triangular, 1 for rhomboidal)
M	spectral truncation
IM	even number of Fourier coefficients
IX	dimension of Fourier coefficients (IX>=IM+2)
NC	dimension of spectral coefficients (NC>=(M+1)*((I+1)*M+2))
NCTOP	dimension of spectral coefficients over top (NCTOP>=2*(M+1))
KM	number of fields
CLAT	cosine of latitude
PLN	((M+1)*((I+1)*M+2)/2) Legendre polynomial
PLNTOP	Legendre polynomial over top
SPC	spectral coefficients
SPCTOP	spectral coefficients over top
MP	identifiers (0 for scalar, 1 for vector, or 10 for scalar and gradient)
F	Fourier coefficients for latitude pair

Author

Iredell

Date

92-10-31

Definition at line 37 of file spsynth.f.

Referenced by sptgpm(), sptgpmv(), sptgps(), sptgpsv(), sptgpt(), sptgptsd(), sptgptv(), sptgptvd(), and sptranf1().