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Information contained when running reassembler using page and msg mode #82

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alphapats opened this issue Apr 10, 2022 · 3 comments
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@alphapats
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alphapats commented Apr 10, 2022

I am running reassembler.py in paging requests (Ring Alert Channel) mode using -m page :
python3 reassembler.py -i output.parsed -m page
I am getting following output:
'109 22 18.01 59.27 798 : 109f0b0c 02
085 22 21.96 67.98 018 : 109f104c 02
085 22 24.46 68.19 020 : 0d011548 11
085 23 18.51 57.27 800 : 0d011548 11
085 23 26.66 70.00 018 : 836951fc 21
085 36 34.00 57.39 798 : 0ca66178 05
065 03 27.14 71.88 020 : 836951fc 21
087 23 20.31 54.93 800 : 109f104c 02
029 12 27.95 76.69 019 : 0ca66178 05
068 20 14.87 82.96 800 : 02a27760 05
048 26 7.97 78.38 803 : 0ca1eb7b 05
071 26 18.59 75.90 019 : 101ad054 02
071 26 27.35 75.81 018 : 0d011548 05
071 27 18.27 76.07 801 : 0cf48243 05
071 26 32.42 75.88 016 : 0cf48243 05`

Similarly when I am running command using pager msg mode:
python3 reassembler.py -i output.parsed -m msg
I am getting following output:
'Message 3526523 0033 @2022-03-26T00:03:56 (len:0) 36 OK : ZQBBByadKafpvI7W9gtCjKFEOdWA8L2+giAJZCo+pioyxKEC8s36qzhYZkM
Message 3526550 0029 @2022-03-26T00:07:06 (len:0) 44 OK : aABBESZZbqdtd
S5cleQptXkiN2D3D67TtsOVC9bKJZpag+z8evSVG9HvKGM
Message 3526577 0044 @2022-03-26T00:07:10 (len:0) 95 OK : aABBDyagBIIu4idJ+hb+rarUgYevPqeuo4rdGBTBfDu3hAGlewzjR6vE
Message 3526514 0047 @2022-03-26T00:07:10 (len:0) 0 OK : ZQBBFCaQvdZG8GfQYWPEpZ1rOqOcxJ3LOuZQjGZodx94HOn2kp1R8qopO2nA
Message 3526523 0035 @2022-03-26T00:07:10 (len:0) 93 OK : ZQBBFyawQ5SyNx
m1afpg
A8crBQjNEGvi+LUv8W3POpmdomfoKU9FGuDco
Message 3526892 0057 @2022-03-26T00:07:14 (len:0) 61 OK : ZQBBESYcNaC5IjEC3
bL7r4kW47iRZj**mqc8ZaPRgKrEvsCVY85sDWduHpO
Message 3526568 0012 @2022-03-26T00:07:14 (len:0) 76 OK : aABBFiawKRZ0ZZLx6BVSkDaf47FpakQYUjS0kKfg07a8F2ZwkyAPhMwREs5K
Message 3526577 0045 @2022-03-26T00:07:14 (len:0) 90 OK : aABBFyavDufqbdRw77I3plQNvaX*tmtE6nOcOa6mLXwbEMdXZekBiBvf9BFJ
Message 3526566 0016 @2022-03-26T00:09:33 (len:0) 21 OK : aABBFCZZjhnaiav8RLISblmKXV69j2SIdpR51IfTWsLzCZNJIHrs6cRYde+W`

I am not able to understand information contained in the output? Can someone explain what these values mean? Also what is significance of these values?

@alphapats alphapats changed the title Information contained when running reassembler using page mode Information contained when running reassembler using page and msg mode Apr 10, 2022
@Sec42
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Sec42 commented Apr 11, 2022

What have you tried to understand that info?

'page' mode is just printing the page requests from IRA packets in a slightly different form - see https://github.com/muccc/iridium-toolkit/blob/master/reassembler.py#L1573
it is one line per page with satid, beamid, latitude, longitude, altitude before the colon, and the page request afterwards. The page request identifies the mobile device to wake up & respond.

'msg' is (reassembling) and printing the pager messages you see in MSG packets. What you see there is what is sent over the air as is. There are very few plaintext page messages remaining as iridium is not selling/marketing that service for several years now.

The encoded text is probably part of the "Iridium Burst" service. But it's contents are not yet understood.

@Sec42 Sec42 closed this as completed Apr 11, 2022
@alphapats
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Due to lack of proper documentation, many times it becomes difficult to understand the info contained in the output especially when its encoded or doesn't make any logical sense. You yourself have written that contents of encoded text are not yet understood. Therefore, if someone asks a simple question, there is no need to be rude. Your project has helped many people like me to understand dynamics of Iridium satellite communication and we all really appreciate your efforts to keep project updated and your prompt replies. Thanks

@Sec42
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Sec42 commented Apr 15, 2022

I'm sorry you feel that my answer was rude. I did answer both your questions.

If you feel a reference to the source is rude, please consider that this is not an end-user ready tool -- and in my experience source code is an easy way to communicate for developers

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