Program sfmvo | Calculate MVO and PVO curve of CSEM data. 
[SYNOPSIS]
sfmvo < in.rsf > out.rsf opt=y log=y mvo=y f=0.08 nnw=1600 n=1
[PARAMETERS]
float   | f | =0.08 |   | 	calculate frequency 
bool    | log | =y |  [y/n] | 	if y, calculate logarithm of MVO 
bool    | mvo | =y |  [y/n] | 	if y, MVO curve; otherwise, PVO curve 
int     | n | =1 |   | 	number of window period 
int     | nnw | =1600 |   | 	sample window 
bool    | opt | =y |  [y/n] | 	if y, determine optimal size for efficiency 
[DIRECTORY]
user/yliu
