Synopsis
		sfpspifcos2b > out.rsf vel=vel.rsf < source.rsf opt=y dt= nt= nv= nb=30 c=0.01

Parameters
		float c=0.01 decaying parameter   float dt=   int nb=30   int nt=   int nv=   bool opt=y [y/n] if y, determine optimal size for efficiency   file vel= auxiliary input file name