Program sfbspvel2 | B-spline coefficients for a 2-D (an)isotropic velocity model. 
[SYNOPSIS]
sfbspvel2 < velz.rsf > out.rsf vx=velx.rsf eta=eta.rsf theta=theta.rsf verb=n
[PARAMETERS]
string  | eta | = |   | 	Anellipticity (auxiliary input file name)
string  | theta | = |   | 	Tilt angle (auxiliary input file name)
bool    | verb | =n |  [y/n] | 	verbosity flag 
string  | vx | = |   | 	Horizontal velocity (auxiliary input file name)
[DIRECTORY]
user/cram
