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 sh_preproc is a script to automate GAMIT/GLOBK setup 
  
 Usage: sh_preproc -ydoy <yr> <doy> -nav <nav> -expt <expt> -orbt <orbt> 
                   -sint <sint> -nepc <nepc> -stime <shour> <smin> -remakex <Y/C/N> 
                   -remakek <Y/C> -remakej <Y/N> -xsite <list> -xver <char> 
  
 Where: 
  
 ydoy   is the 4 digit year and 3 digit day of year [Required]
 nav    is the name of the RINEX navfile [Required]
 expt   is the 4 char experiment ID. [Required]
 orbt   is the 4 char orbit ID. [Required]
 sint   is the sampling interval to process (secs). [Required]
 nepc   is the number of epochs to process. [Required]
 shour smin are the start time of the processing (hr min). [Required]
 -remakex options are Y/C/N:
        Y - remove existing x-files and session.info (No checking)
        C - check x-files satellite and session info wrt. g-files and session.info.
            Remove and remake x-files if any mismatch AND RINEX files are available
            to rebuild x-files. [default]
        N - Don't remake x-files under any circumstances.
 -remakek options are Y/C/N:
        Y - remove existing k-files and remake 
        C - do not remake k-files unless missing or X-files are remade (default)
        N - do not remake k-files -  stop if missing
 -remakej options are Y/N:
        Y - remove existing j-file and remake from navigation file
        N - use existing j-file (necessary if j-file is made from C-files for SA with sampling offsets
 xsite  is a list of sites to be excluded form the dfile.
 xver   1-character x-file version (6th character of x-file). [Default is single-digit year]
  
 Example: sh_preproc -ydoy 98 240 -nav brdc2400.98n -expt tubi -orbt pgga -sint 30 -nepc 2880 -stime 0 0 -remakex C 
  
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