Raw Data Format

[Oblivian]

Probably different types.

Need to decode the start to find the message format. Some are replies to ground interrogation, some are Mode-S only, some then send ES (more data)

http://bibliotheek.knmi.nl/knmipubTR/TR336.pdf

Message type
Downlink Format
Content
ADS-B (56 bits)
DF0 Short air to air ACAS (BDS 0.E)
DF4 Surveillance altitude
DF5 Surveillance identity
DF11 Mode-S only all call reply
ADS-B ES (112 bits)
DF17 Airborne position (BDS 0.5)
Surface position (BDS 0.6)
Extended squitter status (BDS 0.7)
Aircraft type and ID (BDS 0.8)
Airborne velocity (BDS 0.9)

[citylayer]

Why are there 2 different Lenght of messages?
I can now understand the longer messages, but the shorter does not make any sense for me.
Which data are send within the shorter message?

[citylayer]

Thanks for the link.

[Oblivian]

https://www.google.co.nz/url?sa=t&source=web&rct=j&url=http://www.ssd.dhmi.gov.tr/getBinaryFile.aspx%3FType%3D3%26dosyaID%3D195&ved=2ahUKEwi-isqc4qXcAhVFKJQKHWseBwgQFjABegQIBxAB&usg=AOvVaw0-C6-0ErcM2fhXYj8LdQWB

Page 6. You can break it up and enter into windows calculator in decimal mode and change it to binary.

It's how we can decode us hex into expected registration

Sent from my XT1092 using Tapatalk

[citylayer]

I would like to decode the Raw data format on port 30002 (dump1090) for private use.

@022908C312908F4BB84CEA4A5864011C088A741D;
@022908C87FFC5D4B1882016F50;
@022908CABF9C8D06A1019911F39230042E3210D7;

Is there any format description for this format?