sulog

seismic software,very useful

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string sdoc = "\
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SULOG -- time axis log-stretch of seismic traces		\n\
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sulog [optional parameters] <stdin >stdout 			\n\
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Required parameters:						\n\
	none				 			\n\
								\n\
Optional parameters:						\n\
	ntmin= .1*nt		minimum time sample of interest	\n\
	outpar=/dev/tty		output parameter file, contains:\n\
				number of samples (nt=)		\n\
				minimum time sample (ntmin=)	\n\
				output number of samples (ntau=)\n\
	m=3			length of stretched data	\n\
				is set according to		\n\
					ntau = nextpow(m*nt)	\n\
	ntau= pow of 2		override for length of stretched\n\
				data (useful for padding zeros	\n\
				to avoid aliasing)		\n\
								\n\
NOTES:								\n\
	ntmin is required to avoid taking log of zero and to 	\n\
	keep number of outsamples (ntau) from becoming enormous.\n\
        Data above ntmin is zeroed out.				\n\
								\n\
	The output parameters will be needed by suilog to 	\n\
	reconstruct the original data. 				\n\
								\n\
EXAMPLE PROCESSING SEQUENCE:					\n\
		sulog outpar=logpar <data1 >data2		\n\
		suilog par=logpar <data2 >data3			\n\
								\n\
";
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