suresamp.su.main

su 的源代码库

 SURESAMP - Resample in time					

 suresamp <stdin >stdout  [optional parameters]		

 Required parameters:						
	none							

 Optional Parameters:						
	nt=tr.ns	    number of time samples on output	
	dt=		    time sampling interval on output	
			    default is:				
				tr.dt/10^6  seismic data	
				tr.d1       non-seismic data	
	tmin=		    time of first sample in output	
			    default is:				
				tr.delrt/10^6  seismic data	
				tr.f1       non-seismic data	
	verbose=0	    =1 for advisory messages		

 Example 1: (assume original data had dt=.004 nt=256)		
 	sufilter <data f=40,50 amps=1.,0. | 			
 	suresamp nt=128 dt=.008 | ...		 		
 Note the typical anti-alias filtering before sub-sampling.	

 Example 2: (assume original data had dt=.004 nt=256)		
 	suresamp <data nt=512 dt=.002 | ...	 		

 Example 3: (assume original data had d1=.1524 nt=8192)	
 	sufilter <data f=0,1,3,3.28 amps=1,1,1,0 | 		
 	suresamp <data nt=4096 dt=.3048 | ...	 		

 Example 4: (assume original data had d1=.5 nt=4096)		
 	suresamp <data nt=8192 dt=.25 | ...	 		


 Credits:
	CWP: Dave (resamp algorithm), Jack (SU adaptation)
	CENPET: Werner M. Heigl - modified for well log support

 Trace header fields accessed:  ns, dt, delrt, d1, f1
 Trace header fields modified:  ns, dt, delrt (only when set tmin)
				      d1, f1 (only when set tmin)