Synopsis
		sfpspifscos2 < inp.rsf > out.rsf vel=vel.rsf source=source.rsf opt=y dt= nt= nv= isx= isz=

Parameters
		float dt=   int isx=   int isz=   int nt=   int nv=   bool opt=y [y/n] if y, determine optimal size for efficiency   file source= auxiliary input file name   file vel= auxiliary input file name