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sfspiralsort (4.0)		index
user/yunzhi/Mspiralsort.c
\n Sort microseismic surface array recording traces with a given epicenter along a spiral shape R = r0 + d(a-a0). \n

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\n Synopsis
       sfspiralsort < in.rsf x=x_file.rsf y=y_file.rsf > out.rsf dist=dist_file.rsf theta=theta_file.rsf epi_x= epi_y= radius0=1.0 angle0=0.0 dr=
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\n Parameters
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float angle0=0.0 		\tStarting angle of spiral.
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file dist= 		\tauxiliary output file name
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float dr= 		\tSpiral interval parameter.
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float epi_x= 		\treferenced epicenter coordinate x.
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float epi_y= 		\treferenced epicenter coordinate y.
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float radius0=1.0 		\tStarting radius of spiral.
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file theta= 		\tauxiliary output file name
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file x= 		\tauxiliary input file name
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file y= 		\tauxiliary input file name
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