Program sffft3 | FFT transform on extra axis.
[SYNOPSIS]
sffft3 < in.rsf > out.rsf inv=n sym=n sign=inv? 1: 0 opt=y axis=2 pad=2
[COMMENTS]

Input and output are complex data. The input is padded by factor pad.

July 2012 program of the month:
http://ahay.org/blog/2012/07/02/program-of-the-month-sffft3/

[PARAMETERS]
int     | axis | =2 |   | 	Axis to transform 
bool    | inv | =n |  [y/n] | 	if y, perform inverse transform 
bool    | opt | =y |  [y/n] | 	if y, determine optimal size for efficiency 
int     | pad | =2 |   | 	padding factor 
int     | sign | =inv? 1: 0 |   | 	transform sign (0 or 1) 
bool    | sym | =n |  [y/n] | 	if y, apply symmetric scaling to make the FFT operator Hermitian 
[DIRECTORY]
system/generic
