SUMIXGATHERS - mix two gathers					

 sumixgathers file1 file2 > stdout [optional parameters]		

 Parameters: none							

 IMPORTANT: Both files have to be sorted by offset			
 Mixes two gathers keeping only the traces of the first file		
 if the offset is the same. The purpose is to substitute only	
 traces non existing in file1 by traces interpolated store in file2. ", 

 Example. If file1 is original data file and file 2 is obtained by	
 resampling with Radon transform, then the output contains original  
 traces with gaps filled						
 


 Credits:
	Daniel Trad. UBC
 Trace header fields accessed: ns, dt