Program sfzmarch | Phase-space traveltime (marching in z) 
[SYNOPSIS]
sfzmarch < vel.rsf > out.rsf na= da= a0= order=3 scheme=2 verb=n what=
[PARAMETERS]
float   | a0 | = |   | 	starting velocity 
float   | da | = |   | 	angle sampling 
int     | na | = |   | 	angle samples 
int     | order | =3 |   | 	interpolation order 
int     | scheme | =2 |   | 	finite-difference order 
bool    | verb | =n |  [y/n] | 	verbosity 
string  | what | = |   | 	what to compute (t,x,z,a) 
[DIRECTORY]
user/fomels
