Have you had time to get the documentation worked out for decoding? (Just asking as its been a month. Plus it would help in figuring out whats up with it.)
KRAKsat Satellite
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@KD9KCK - please, have a look here: https://www.kraksat.pl/space/wp-content/uploads/2019/08/KRAKsat-Radio.pdf
After a restart, KRAKsat is simply transmitting âSTART U1, START U2, BOOT NR xâ and after these messages there should be a beacon (as described in pdf).
Best regards,
Alicja
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As far as I can tell from the frames stored in our DB: not a single beacon has been recorded since. But it reboots a lot! ~500 reboots in ~4h45min, see:
"time": "2019-08-04 05:47:34",
"monitor": ":SP6ZWR: BOOT NR 10561"
"time": "2019-08-04 01:00:33",
"monitor": ":SP6ZWR: BOOT NR 10069"
Unfortunately we do not have any telemetry yet 
Hello Alicja,
As KrakSat seems to get more healthy after a while there are some undocumented beacon contents present in the recorded data. Could you give some more hints on, e.g. ER, CU, EM, etc.?
Best regards,
Patrick
Hello Patrick,
Yes, we know that unfortunately KRAKsat is now in the boot loop.
Where did you find these beacons? EM, CU and ER are Ĺwiatowidâs (ID:44426) beacon parameters.
Best regards!
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Ok, so they might have overlapped in an observation. Just wondering: is that still possible?
We have a very basic dashboard, only showing the ASCII strings of the telemetry beacons, at
No filtering, so it might indeed be beacons from other satellites that crossed the KrakSat observation. But there also seem to be some data from KrakSat besides the boot-loop counterâŚ
Maybe they have overlapped, maybe itâs still possible⌠After the restart there actually should be a beacon from KRAKsat, but as far as I know it manages only to send first line of it (STS with 32-bit 0/1 status) and after that it starts to reboot again. If you encounter a log from KRAKsat with master or radio status (M1;LOG or U1;RL), please let us know - it would be very valuable.
Thank you for your interest and help!
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Sure, Iâll check that immediately!
Everything we have containing M1;LOG or U1;RL unfortunately is from SR6SAT - Swiatowid
Ohh, as I expected⌠But thank you very much for checking.
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I think it would be best if they could shut KRAKsat down for a while. Let it fully charge its batteries (Assuming thats why its dropping out half way thru boots)
Going to also assume thats not possible because of it failing to boot.
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@KD9KCK - as you assumed, itâs unfortunately not possible.
Dear all - Iâm today here with another petition. If there was a possibility that anyone could try to listen to KRAKsat when itâs in sunlight, itâd be absolutely amazing. Since 11.09 every recording is from the night (and at night it probably doesnât reboot) and timings of passes above our GS are also at night - so we donât really have any information if itâs still âworkingâ or not. Itâd be very valuable and any help itâs much appreciated. If you have any questions, donât hesitate to ask.
Thank you!
Alicja
Could you calculate and give us the time periods that KRAKsat is in sunlight?
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Itâs in sunlight on the Southern hemisphere. I already scheduled a few passes on some Australian stations.
We need a tick box on the scheduling interface that will only schedule passes in sunlight or night time. The ephem library provides a function to tell whether a satellite is sunlit or not.
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Thank you very much for your help! It seems that itâs still restarting (reboot nr 106313 today).
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I scheduled a few observations on my Ground Station 160km South of Sydney.
Some of the heard AFSK signals were very strong but it sounds like it is still in
some sort of endless loop.
Wolfgang vk2byf
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Yes, youâre right - but itâs good to know that itâs not completely silent after all. Thank you very much for your support!