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SPREAD    A program to add Gaussian noise to travel times
Input file:  is  the  output file  (tx.out)  generated  by
Output file: tx.out contains the travel times with noise added
in     the same format as  A seed for  the random number
generator is input  interactively.  The standard deviation of
the noise added to each pick is equal to  the uncertainty for
that pick in the file.  Ingo Pecher Sat Mar 7 19:13:54 EST 1998