sfanovc (2.0-git)
Oriented anisotropy continuation: shifted hyperbola travel-time approximation.

        sfanovc < in.rsf > out.rsf eps=0.1 nv=1 lagrange=n plus=y debug=y isotr=n testwarp=n full=n v0= ns=1 ds= s0= smax= epsr=0.001 s0=

Axis order: t, p, x

bool debug=y [y/n]
Implement debugger: add it later
float ds=
s step size
float eps=0.1
stretch regularization
float epsr=0.001
damper for root
bool full=n [y/n]
full accuracy flag - considers all (s-1) terms in any power
bool isotr=n [y/n]
Implement debugger: add it later
bool lagrange=n [y/n]
Use Lagrangian method
int ns=1
s steps
int nv=1
number of velocity steps
bool plus=y [y/n]
Plus or minus in coefficients: I have two versions
float s0=
float smax=

bool testwarp=n [y/n]
Implement debugger: add it later
float v0=