Some few more examples mainly to illustrate the power of the %%--%%ahl option, extracting from the same file of GTS bulletins as used before. For simplicity, we combine with option %%--%%only_ahl to give readable output.

Extracting all BUFR messages from a specific centre (ENMI) to file [[bufrextract.pl_ahlsenmi|ahls_enmi]]:

  bufrextract.pl sn.0113.bin --only_ahl --ahl "ENMI" --outfile ahls_enmi

Extracting synoptic observations from land stations from 2 specific centres to file [[bufrextract.pl_ahlsisl|ahls_isl]]:

  bufrextract.pl sn.0113.bin --only_ahl --ahl "IS(M|I|N)... (ENMI|EGRR)" --outfile ahls_isl

Extracting all corrected bulletins to file [[bufrextract.pl_ahlsccx|ahls_ccx]]:

  bufrextract.pl sn.0113.bin --only_ahl --ahl "CC.$" --outfile ahls_ccx
  
Extracting a specific regular bulletin (excluding corresponding corrected and retarded bulletins by ending ahl regexp with a '$') to file [[bufrextract.pl_ahlseswi|ahls_eswi]]:

  bufrextract.pl sn.0113.bin --only_ahl --ahl "ISSD01 ESWI 160000$" --outfile ahls_eswi

Same as above, but allowing also for corrected and retarded bulletins, to file [[bufrextract.pl_ahlseswiall|ahls_eswiall]]:

  bufrextract.pl sn.0113.bin --only_ahl --ahl "ISSD01 ESWI 160000" --outfile ahls_eswiall

Extracting all oceanographic/limnographic data (IO) that are not Buoy observations (IOB) to file [[bufrextract.pl_ahlsio|ahls_ionB]]:

  bufrextract.pl sn.0113.bin --only_ahl --ahl "^IO[^B]" --outfile ahls_ionB