Possible updates required in patterns.json - Githubissues

xoolive / rs1090

Decode Mode S, ADS-B and FLARM signals in Rust + Python

MIT License

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Possible updates required in patterns.json #3

Closed xoolive closed 5 months ago

xoolive commented 6 months ago

Some counterintuitive examples to investigate:

aircraft 4d24ca / 9H-VVI (among many others): registered in Malta, out of the Malta range (4d2000 to 4d23ff).
Does the range need to be edited?
aircraft c95000 / 4W-AAL: registered in Timor-Leste, undocumented range (Vanuatu stops at c903ff) Does Timor-Leste have a range?
aircraft registrations in T2- are assigned to Tuvalu, no range in the patterns.json file. I have two occurrences T2-6965 (7d007c) and T2-6322 (7cd518), in the Australia range (7c0000 to 7fffff), mostly visible in Australia. What to think?

@espinielli any hint?

espinielli commented 6 months ago

ICAO docs only say for example for Malta

xoolive commented 6 months ago

About Malta: that's exactly 4d2000 to 4d23ff, but they obviously went over their limit already. I am wondering whether there has been an update in those documents that we are not aware of.

espinielli commented 6 months ago

Addresses are allocated (to my knowledge) in Annex 10 Volume III. From ICAO page [1], the last Amendment of volume 3 is from 2021...

Are the examples above correct ones, or errors?

[1] https://store.icao.int/en/annexes/annex-10

espinielli commented 6 months ago

For 9H-VVI you can see it is in the list of the registered aircraft in Malta [2]...unfortunately they do not provide ICAO 24-bit addresses. It is also possible that they are using a temporary address...this can be done for one year and eventually renewable... Is this the only instance of a Maltese address beyond the allocated block?

For the others it is all reverse engineering, I guess.

[2] https://www.transport.gov.mt/aviation/aircraft-flight-standards/registration-of-aircraft-2663

xoolive commented 6 months ago

No I see many aircraft beyond the upper limit, with tail numbers associated to Malta. I wonder how much reverse engineering is really necessary here... :sob:

espinielli commented 6 months ago

Others are using the default ranges https://github.com/Mictronics/readsb-protobuf/blob/dev/webapp/src/script/readsb/backend/flags.ts

xoolive commented 6 months ago

Well similar to my file here...

espinielli commented 6 months ago

Reading ICAO meeting resolutions it looks like States do not fully comply with correct allocation of the blocks...