      ftable (filename) [options]

      options:
      -x N:       operate on extension N (0 is default)
      -n EXTNAME: operate on named extension (incompatible with -x)
      -row N:     print row number N
      -column n:  print column named n
      -ncolumn N: print column number N
      -list:      print extension names
      -layout     print the table layout (fields)

      Print out FITS table data, or FITS table header data.  By default,
      the entire FITS table is printed.  Command-line options may be used
      to restrict the output to a single column or single row.  Additional
      options may be used to list all extension names or to print out the
      complete table fields for the selected extension.  By default, the
      key/values are taken from the first extension.  If the -x is
      provided the Nth extension's header unit is used instead, with 0
      being the first extension after the PHU.  If the -n option is
      provided, the named extension (matching keyword EXTNAME) is used.