Synopsis
		sfycvelinvww < in.rsf > out.rsf velout=vout.rsf ns=nh ds= os= huber=0 irls=0 nstep=1 niter=20 savevel=0 rwt=0.0 mwt=0.0 epw=0.01 srate=0.01

Parameters
		float ds=   float epw=0.01   int huber=0   int irls=0   float mwt=0.0   int niter=20   int ns=nh   int nstep=1   float os=   float rwt=0.0   int savevel=0   float srate=0.01   file velout= auxiliary output file name