• Major improvements to the DSP and decoding engine - gives much better decoding success rate, especially for weak transmissions from distant aircraft.
• Each VDL2 channel is now processed in a separate thread, which allows balancing the load onto multiple CPU cores.
• Fixed a nasty decoder bug which caused good frames to be corrupted during decoding stage and therefore missed.
• Added CRC checking for ACARS messages. If there is a CRC mismatch, the message will still be logged, but with an appropriate warning.
• New StatsD metric avlc.msg.air2air - counts messages from aircraft to aircraft (however strange it seems, such things happen in real life).
• New StatsD metric decoder.errors.too_long - counts VDL2 bursts dropped due to unreasonably large value in the length field.
• Due to changes in the decoding engine, the following StatsD metric are now obsolete and have been removed: avlc.errors.no_flag_start, avlc.errors.no_flag_end, decoder.errors.no_preamble.
• Added --extended-header command line option which causes a few decoder diagnostic parameters to be logged for each message. Refer to the FAQ in README.md for description of the fields.
• Other minor bugfixes and improvements.
• C11-capable compiler is now required to build the program.