SUVCAT -  append one data set to another, with or without an  ", 
           overlapping	region.  Data in the overlap may be     
           determined by one of several methods.               

 suvcat data1 data2 >stdout					

 Required parameters:						
        none							

 Optional parameters for overlapping sections:			

  taplen=0    Length of overlap in integer number of           
                  samples.(Default is 0.)                      

  taptype=0    Type of taper or combination method in the	
                  overlap region.  0 - average                 
                                   1 - maximum magnitude       
                                   2 - cosine scaled           
                                   3 - summation               

 Computational Notes:						
 
 This program vertically concatenates traces from data2 onto   
 the end of the corresponding traces in data1, with a region   
 of overlap, defined by taplen.  Data in the overlapping       ", 
 region is combined by the method specified by taptype. The    
 currently available methods are:                              

     taptype=0    output is assigned the unweighted average of 
                  each point in the overlap                    
     taptype=1    output is assigned the value of the maximum  
                  absolute value of each point in the overlap  
     taptype=2    output is assigned the weighted average of   
                  each point in the overlap, where the output  
                  is the sum of cos(x) times the values on the 
                  first section, and 1-cos(x) times the values 
                  on the second section, where x is factor that
                  goes from 0 to pi/2 across the overlap. This 
                  favors the upper section in the upper part of
                  the overlap, and favors the lower section in 
                  the lower part of the overlap.               
     taptype=3    output is assigned the sum of the amplitudes 
                  at each sample in the overlap                


 Credits:
	CWP: Jack K. Cohen, Michel Dietrich (Original SUVCAT)
	     Steven D. Sheaffer (modifed to include overlap) 
 IfG Kiel: Thies Beilecke (added taptype=3)

 Trace header fields accessed:  ns
 Trace header fields modified:  ns