dt1tosu.su.main

su 的源代码库

 DT1TOSU - Convert ground-penetrating radar data in the Sensors & Software
	    X.dt1 GPR format to SU format.				

 dt1tosu < gpr_data_in_dt1_format  > stdout				

 Optional parameters:							
 ns=from header	number of samples per trace			
 dt=.8			time sample interval (see below)		
 swap=1		perform byte swapping (big endian machines)	
			=0 don't swap bytes (little endian machines)	
 verbose=0		silent						
			=1 S & S header values from first trace		
				sent to outpar				
			=2 S & S header values from all traces		
				sent to outpar				
 outpar=/dev/tty	output parameter file				
 list=0		silent						
			=1 list explaining labels used in verbose	
			     is printed to stderr			

 Caution: An incorrect ns field will munge subsequent processing.	

 Notes:								
 For compatiblity with SEGY header, apparent dt is set to		
 .8 ms (800 microsecs).  Actual dt is .8 nanosecs.			
 Using TRUE DISTANCES, this scales velocity				
 and frequency by a factor of 1 million.				
	Example: v_air = 9.83X10^8 ft/s	 (real)				
		 v_air = 983 ft/s	(apparent for su)		
		Example: fnyquist = 625 MHz	(real)			
			fnyquist = 625 Hz	(apparent for su)	

 IBM RS6000, NeXT, SUN are examples of big endian machines		
 PC's and DEC are examples of little endian machines			

 Caveat:								
 This program has not been tested on DEC, some modification of the	
 byte swapping routines may be required.				


 Credits:
	CWP: John Stockwell, Jan 1994   Based on a code "sugpr" by
	UTULSA: Chris Liner & Bill Underwood  (Dec93)
 modifications permit S & S dt1 header information to be transferred
 directly to SU header

 Trace header fields set: ns, tracl, tracr, dt, delrt, trid,
			    hour, minute, second