bufr_filter

DESCRIPTION

Apply the rules defined in rules_file to each BUFR message in the BUFR files provided as arguments.

USAGE

bufr_filter [options] rules_file file file ...

OPTIONS

Force. Force the execution not to fail on error.

Output grib is written to output_grib_file. If an output grib file is required and -o is not used, the output grib is written to filtered.out

Version.

Copy GTS header.

Does not fail when the message has wrong length

Verbose.

bufr_filter examples

1. The bufr_filter processes sequentially all bufr messages contained in the input files and applies the rules to each one of them. Input messages can be written to the output by using the "write" statement. The write statement can be parameterised so that output is sent to multiple files depending on key values used in the output file name.




2. To print header information only (all BUFR messages must have it)

   print "[bufrHeaderCentre] [bufrHeaderSubCentre] [masterTablesVersionNumber] [localTablesVersionNumber] [numberOfSubsets]";
   

   > bufr_filter rules_file ../data/bufr/syno_multi.bufr
   98 0 13 1 1
   98 0 13 1 1
   98 0 13 1 1
   




3. To print values from the data section the messages has to be unpacked. This rules_file:\

   set unpack=1;
   print "block=[blockNumber] station=[stationNumber] lat=[latitude] lon=[longitude] t2=[airTemperatureAt2M]";
   

   will print out some data values from SYNOP BUFR messages.

   > bufr_filter rules_file ../data/bufr/syno_multi.bufr
   block=1 station=1 lat=70.93 lon=-8.67 t2=274.5
   block=1 station=3 lat=77 lon=15.5 t2=268.4
   block=1 station=7 lat=78.92 lon=11.93 t2=268.5