Program sfzomig3 | 3-D zero-offset modeling/migration with extended SSF 
[SYNOPSIS]
sfzomig3 slo=Fs.rsf < Fd.rsf > Fw.rsf < Fi.rsf ompchunk=1 ompnth=0 verb=n eps=0.01 inv=n causal=n twoway=y nrmax=1 dtmax=0.004 pmx=0 pmy=0 tmx=0 tmy=0 nw= dw= ow=0. mode=
[COMMENTS]

May 2019 program of the month:
http://ahay.org/blog/2019/05/06/program-of-the-month-sfzomig3/

[PARAMETERS]
bool    | causal | =n |  [y/n] | 	y=causal; n=anti-causal 
float   | dtmax | =0.004 |   | 	time error 
float   | dw | = |   | 	
float   | eps | =0.01 |   | 	stability parameter 
bool    | inv | =n |  [y/n] | 	y=modeling; n=migration 
string  | mode | = |   | 	
int     | nrmax | =1 |   | 	maximum references 
int     | nw | = |   | 	
int     | ompchunk | =1 |   | 	OpenMP data chunk size 
int     | ompnth | =0 |   | 	OpenMP available threads 
float   | ow | =0. |   | 	
int     | pmx | =0 |   | 	padding on x 
int     | pmy | =0 |   | 	padding on y
file    | slo | = |   | 	auxiliary input file name
int     | tmx | =0 |   | 	taper on x
int     | tmy | =0 |   | 	taper on y 
bool    | twoway | =y |  [y/n] | 	two-way traveltime 
bool    | verb | =n |  [y/n] | 	verbosity flag 
[DIRECTORY]
user/psava
