SUIMP3D - generate inplane shot records for a point 	
          scatterer embedded in three dimensions using	
          the Born integral equation			",							

suimp3d [optional parameters] >stdout 			

Optional parameters					
	nshot=1		number of shots			
	nrec=1		number of receivers		
	c=5000		speed				
	dt=.004		sampling rate			
	nt=256		number of samples		
	x0=1000		point scatterer location	
	y0=0		point scatterer location	
	z0=1000		point scatterer location	
	sxmin=0		first shot location		
	symin=0		first shot location		
	szmin=0		first shot location		
	gxmin=0		first receiver location		
	gymin=0		first receiver location		
	gzmin=0		first receiver location		
	dsx=100		x-step in shot location		
	dsy=0	 	y-step in shot location		
	dsz=0	 	z-step in shot location		
	dgx=100		x-step in receiver location	
	dgy=0		y-step in receiver location	
	dgz=0		z-step in receiver location	

 Example:                                              
       suimp3d nrec=32 | sufilter | supswigp | ...     


 Credits:
	CWP: Norm Bleistein, Jack K. Cohen


 
 Theory: Use the 3D Born integral equation (e.g., Geophysics,
 v51, n8, p1554(7)). Use 3-D delta function for alpha.

 Note: Setting a 3D offset in a single offset field beats the
       hell out of us.  We did _something_.

 Trace header fields set: ns, dt, tracl, tracr, fldr, tracf,
                          sx, sy, selev, gx, gy, gelev, offset