Synopsis
		sfitrace < xEscFile.rsf esct=tEscFile.rsf > xResFile.rsf zres=zResFile.rsf x0=0.f z0=0.f p0=0.f sa0=0.f dx=5*xStep dt=0.02f

Parameters
		float dt=0.02f time-range for point detection   float dx=5*xStep x-range for point detection   string esct= escape-time file (auxiliary input file name)   float p0=0.f migration angle   float sa0=0.f scattering-angle   float x0=0.f x-coordinate of the diffraction point   float z0=0.f z-coordinate of the diffraction point   string zres= auxiliary output file name