KRAKsat Satellite

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 counter…

Maybe they have overlapped, maybe it’s 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, I’ll check that immediately!

Everything we have containing M1;LOG or U1;RL unfortunately is from SR6SAT - Swiatowid :frowning:

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, it’s unfortunately not possible.

Dear all - I’m today here with another petition. If there was a possibility that anyone could try to listen to KRAKsat when it’s in sunlight, it’d be absolutely amazing. Since 11.09 every recording is from the night (and at night it probably doesn’t reboot) and timings of passes above our GS are also at night - so we don’t really have any information if it’s still “working” or not. It’d be very valuable and any help it’s much appreciated. If you have any questions, don’t hesitate to ask.

Thank you!
Alicja

Could you calculate and give us the time periods that KRAKsat is in sunlight?

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It’s 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 it’s still restarting (reboot nr 106313 today).

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Created an issue to track this enhancement: satnogs-network#675

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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, you’re right - but it’s good to know that it’s not completely silent after all. Thank you very much for your support!

Hi all!

Our simulations show that KRAKsat will be in sunlight all the time between 14 Dec 2019 03:35 UTC and 19 Dec 2019 07:31 UTC. It would be extremely helpful if anyone could listen to our satellite in that time, mostly on 14th and 15th of December (Saturday & Sunday) - we are going to need as many observations as possible to find out if change in lightning conditions changes the behaviour of KRAKsat and if we can do something about it (it’s still in reboot loop for now - more than 300 000 reboots achieved).

If you would like to know our satellite story more, we published a report today called KRAKsat Lessons Learned - it’s a summary and analysis of mistakes made during our satellite mission (both from payload and platform side). You can find it on ResearchGate (in english) here: https://www.researchgate.net/publication/337874738_KRAKsat_Satellite_Mission_-_Lessons_Learned_EN

Thank you very much in advance.

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Hello, our ground station will follow Kraksat this week end. I am involved in EntrySat and we have been deployed the same day :=) Thank you for your paper, it is very interesting and shows your scientific spirit. Unfortunately EntrySat is not working too… the 3rd July was finally an unlucky day !!!

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Thank you very much for your help! We really appreciate that.

It’s sad to hear about EntrySat - I’ll keep my fingers crossed for re-establishing the communication. If you ever publish some studies about your satellite, let me know - it’d be great to read more about your case!

Hello,

I just wanted to thank everyone planned for today and few next days - if there’s anyone else that would like to help in our difficult case and listen to KRAKsat satellite, I’d really appreciate that. The most important days are 14th, 15th and 16th of December. Thanks in advance and have a good weekend!

If you have any questions about KRAKsat mission, don’t hesitate to ask :).

Best regards,
Alicja

I am scheduling observations on my UHF station 724 located 160km south of Sydney Australia. My last 4 observations have been bad. I have been hearing the continuous reboot patterns up to that point in time.
73 bob vk2byf

Definitely signal in this observation: https://network.satnogs.org/observations/1366928/

Managed to decode a few packets using direwolf:

[0.3] SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
[0.3] SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
[0.3] SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:        BOOT NR 316478
[0.3] SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=        BOOT NR 316478<0x00>
[0.3] SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100