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\n Synopsis
		sffrt < in.rsf > out.rsf ref=ref.rsf curv=0 inv=n mtd=0 mu=0.05 eta=0.05 niter=5 np=0 op=0 dp=0 x0=maxoff

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\n Parameters
		\n \n \n \n   int curv=0 \t0: linear; 1:parabolic \n \n \n\n \n \n \n   float dp=0 \tstepout interval \n \n \n\n \n \n \n   float eta=0.05 \teta: for fhrt, fcrt \n \n \n\n \n \n \n   bool inv=n [y/n] \tif y, perform inverse operation \n \n \n\n \n \n \n   int mtd=0 \t0: fart; 1:firt; 2:fhrt; 3:fcrt \n \n \n\n \n \n \n   float mu=0.05 \tmu: for firt, fhrt, fcrt \n \n \n\n \n \n \n   int niter=5 \tsparse iterations: for fhrt, fcrt \n \n \n\n \n \n \n   int np=0 \tstepout number \n \n \n\n \n \n \n   float op=0 \tfirst stepout (moveout at "ref") \n \n \n\n \n \n \n   file ref= \tauxiliary input file name \n \n \n\n \n \n \n   float x0=maxoff \treference offset \n \n \n

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