
Usage:
      bufrextract.pl 
          [--ahl ]
          [--only_ahl | --without_ahl | --gts]
          [--filter ]
          [--outfile ]
          [--help]
          [--verbose n]

Options:
       --ahl  Extract BUFR messages and/or AHLs with AHL
                          matching  only
       --gts              Include full gts message envelope if present
       --only_ahl         Extract AHLs only
       --without_ahl      Extract BUFR messages only
       --filter 
                          Extract BUFR messages matching the  only
       --outfile 
                          Will print to  instead of STDOUT
       --help             Display Usage and explain the options used. For even
                          more info you might prefer to consult perldoc bufrextract.pl
       --verbose n        Set verbose level to n, 0<=n<=6 (default 0)

    Options may be abbreviated, e.g. "--h" or "-h" for "--help".

    For option "--ahl" the  should be a Perl regular expression.
    E.g. "--ahl 'ISS... ENMI'" will decode only SHIP BUFR (ISS) from
    CCCC=ENMI.

    Use option "--gts" if you want the full GTS message envelope (if
    present) to be included in output. There are 2 main variations on this
    envelope (SOH/ETX and ZCZC notation), for details see the Manual on the
    GTS: Attachment II-4. Format of Meteorological Messages.

    Using "--filter" makes it possible to filter based on almost any of the
    metadata present in section 1 (and 0) of the BUFR messages. Some few
    examples which hopefully are enough to illustrate how to write the
    : according to Common Code Table C-13 of WMO-no. 306,
    "dc=0 ic=0,1,2,6" should take care of synoptic and one-hour observations
    from fixed-land stations, while "dc=1 ic=0,6" should do the same for
    marine stations. If you want to extract both, use for : "dc=0 ic=0,1,2,6 | dc=1 ic=0,6".

    Here is the full list of metadata available for filtering (the first
    2-letter abbreviation is what should be used in the ):

      be = BUFR edition
      oc = Originating centre
      os = Originating subcentre
      dc = Data category (table A)
      ic = International data subcategory
      lc = Local data subcategory
      mt = Master table version number
      lt = Local table version number
      ye = Year
      mo = Month
      da = Day
      ho = Hour
      mi = Minute
      se = Second

    Note that no bufrtables are needed for running bufrextract.pl, since
    section 4 in BUFR message will not be decoded (which also speeds up
    execution quite a bit).