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\n Synopsis
		sflsm_dsr2d < in.rsf > out.rsf slowness=vel.rsf error=error.rsf verb=n eps=0.01 niter=10 nt=1 nr=1 dt=0.004 npad=0

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\n Parameters
		\n \n \n \n   float dt=0.004 \ttime error \n \n \n\n \n \n \n   float eps=0.01 \tstability parameter \n \n \n\n \n \n \n   file error= \tauxiliary output file name \n \n \n\n \n \n \n   int niter=10 \tnumber of iterations \n \n \n\n \n \n \n   int npad=0 \tpadding on offset wavenumber \n \n \n\n \n \n \n   int nr=1 \tmaximum number of references \n \n \n\n \n \n \n   int nt=1 \ttaper size \n \n \n\n \n \n \n   file slowness= \tauxiliary input file name \n \n \n\n \n \n \n   bool verb=n [y/n] \tverbosity flag \n \n \n

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