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 Script to get hfiles by day number from the scripps archive 
  
 Usage: sh_get_hfiles -yr <yr> -doy <doy> -ndays <num> -net <networks> -soln -ftp_prog <ftp/ncftp>
  
        <yr> 4 char year of hfile requested  [Required] 
        <doy> 3 char day of year of hfile requested [Required] 
        <num> Number of consecutive days of hfiles to retreive [Default 1] 
        <networks> List of networks to be retreived from the ftp archive [Default ALL] 
        Network choices: igs1 igs2 bard cors noam dgga eura pgga net1 net2 net3 net4 
        -soln Check the solution archives rather than the h-file archives
        <ftp/ncftp> choose the ftp program to be used [default is ftp]
  
 Examples: sh_get_hfiles -yr 1999 -doy 246 
           sh_get_hfiles -yr 1999 -doy 246 -ndays 1 -net igs1 igs2 eura 
  
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