Program sfhwtex | Huygens wavefront tracing traveltimes 
[SYNOPSIS]
sfhwtex < Fv.rsf sou=Fs.rsf > Fw.rsf verb=n wini=n nt=100 ot=0 dt=0.001
[PARAMETERS]
float   | dt | =0.001 |   | 	
int     | nt | =100 |   | 	
float   | ot | =0 |   | 	
file    | sou | = |   | 	auxiliary input file name
bool    | verb | =n |  [y/n] | 	verbosity flag 
bool    | wini | =n |  [y/n] | 	initialize two wavefronts 
[DIRECTORY]
system/seismic
