Observation 360135: IRVINE-02 (99915)

Regarding Observation 360135

I decoded some frames my using the available flowgraphs and manually shifting the signal.

0x86 0xa2 0x40 0x40 0x40 0x40 0x60 0x98 0xaa 0x6e 0x82 0x82 0x00 0xe1 0x03 0xf0 0xff 0xff 0xf0 0x00 0x01 0x00 0x00 0x69 0x4a 0x5c 0x0f 0xb1 0xa6 0x00 0x06 0xfc 0x83 0x08 0x28 0xcd 0x98 0x01 0x01 0x00 0x00 0x68 0x18 0x02 0x01 0x00 0x7b 0x9a 0x1f 0x6f 0x03 0x01 0x00 0x04 0x2d 0x5f 0x03 0x5f 0x00 0x16 0x03 0x47 0x01 0x39 0x03 0x68 0x00 0x2c 0x04 0x01 0x0c 0x3a 0x04 0xab 0x05 0x01 0x00 0x00 0x00 0x00 0x19 0x19 0xe6 0x75 0x35 0x0a 0x03 0x7d 0x00 0x58 0xfa 0x5b 0xff 0xc1 0x00 0x32 0x00 0x19 0xff 0xc5 0x00 0x06 0x86 0x00 0xff 0xf8 0x64 0x00 0x00 0x1b 0x9e 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x06 0x01 0x03 0x88 0x02 0x42 0x00 0x31 0x00 

Unfortunately this is not IRV-02! The data you provide indicate a source callsign LU7AA. I don’t recall which satellite it is assigned to, but this should be easy to find out.
See the “ax25frames” decoder working:

pd@hexdump:~/software$ python test-decoders.py 
{'ax25frames_ctl': 3,
 'ax25frames_dest_callsign': u'CQ    ',
 'ax25frames_dest_ssid': 0,
 'ax25frames_info': '\xff\xff\xf0\x00\x01\x00\x00iJ\\\x0f\xb1\xa6\x00\x06\xfc\x83\x08(\xcd\x98\x01\x01\x00\x00h\x18\x02\x01\x00{\x9a\x1fo\x03\x01\x00\x04-_\x03_\x00\x16\x03G\x019\x03h\x00,\x04\x01\x0c:\x04\xab\x05\x01\x00\x00\x00\x00\x19\x19\xe6u5\n\x03}\x00X\xfa[\xff\xc1\x002\x00\x19\xff\xc5\x00\x06\x86\x00\xff\xf8d\x00\x00\x1b\x9e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x06\x01\x03\x88\x02B\x001\x00',
 'ax25frames_pid': 240,
 'ax25frames_src_callsign': u'LU7AA\x00',
 'ax25frames_src_ssid': 0}

Unfortunately is BUGSAT-1, in the screenshot from gpredict bellow you can see BUGSAT-1 and the object 2018-099AH, which was the one we used to track IRVINE-02.

1 Like

Many thanks for the identification. It’s clear we’re picking up Bugsat-1 [40014/14033E], and also confirmed by the Ikhnos comparison.