20
Aug
12

Designing an ASTERIX Protocol Parser

In the next weeks I’ll try to describe the steps taken in order to decompose ASTERIX, Eurocontrol variable length binary protocol for Radar message Exchange. According to Eurocontrol, ASTERIX Stands for: All Purpose STructured Eurocontrol SuRveillance Information EXchange. Try not to confuse it with Asterisk (the opensource telephony project).

One of the major challenges was to achieve a great reuse of the domain classes designed to mirror the protocol fields since ASTERIX employs a design where some packet types are simply extensions of previous released versions, therefore sharing a huge amount of fields. One example is the Cat034 and Cat002 packets. If you are unfamiliar with ASTERIX, Eurocontrol site has a great deal of documentation on ASTERIX format.

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