KRAKsat Satellite

cgbsat · September 15, 2019, 2:05pm

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.

yiea · September 16, 2019, 5:34am

Thank you very much for your help! It seems that it’s still restarting (reboot nr 106313 today).

kerel · September 16, 2019, 10:51am

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

vk2byf · September 17, 2019, 7:32am

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

yiea · September 17, 2019, 9:38am

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!

yiea · December 10, 2019, 9:46pm

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.

F5MDY · December 12, 2019, 6:25am

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 !!!

yiea · December 12, 2019, 6:46am

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!

yiea · December 13, 2019, 7:07am

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

vk2byf · December 13, 2019, 10:14pm

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

vk5qi · December 14, 2019, 12:54am

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

yiea · December 14, 2019, 12:46pm

Hi all,
Thank you once more for your support!

If any of you could schedule some observations today and tommorrow it would be amazing - we are listening from our station in Poland and it seems that the satellite’s reboot frequency is changing significantly, but the bad news are that KRAKsat is constantly turning itself off just before pass above central Europe. It would be very helpful to have a bit more data from west and eastern Europe and other parts of the world to be able to analyze the new restart pattern.

Your support is extremely valuable and we are and will be analyzing every new SatNOGS observation for the next few days. It’s good to have you on board with so much support to our mission! Thanks!

Best regards,
Alicja

n5fxh · December 14, 2019, 1:14pm

Hi,

You got this one:
https://network.satnogs.org/observations/1369015/

using direwolf too:
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316709
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316709<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566440170;316709;3286;22
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566440180;316710;3287;22
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316711
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316711<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566440190;316711;3288;22
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316712
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316712<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566440200;316712;3287;22
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316715
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316715<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316716
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316716<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316717
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316717<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316718
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100

jebba · December 14, 2019, 3:58pm

Hey, I scheduled all the observations I could over my station. But can’t you just use the SatNOGS network and schedule a bunch of observations on all the various stations yourself? Just curious.

pierros · December 14, 2019, 4:06pm

That would require a user account that owns an online station. Check the permissions matrix for more details.

F5MDY · December 14, 2019, 6:00pm

From Toulouse :

019-12-14 17:04:49.150 UTC: [52 Bytes KISS Frame (without CRC)]
ctrl: 3 PID: F0 {UI} 19 Payload Bytes
from SR9KRA-6 to APDST4-6 via WIDE1-1,WIDE2-1:
1 > 3D 4B 72 61 6B 53 61 74 20 53 54 41 52 54 20 55 32 21 00
=KrakSat START U2!.

2019-12-14 17:04:51.290 UTC: [57 Bytes KISS Frame (without CRC)]
ctrl: 3 PID: F0 {UI} 24 Payload Bytes
from SR9KRA-6 to APDST4-6 via WIDE1-1,WIDE2-1:
1 > 3D 20 20 20 20 20 20 20 20 42 4F 4F 54 20 4E 52 20 33 31 37
21 > 34 34 36 00
= BOOT NR 317446.

n5fxh · December 14, 2019, 10:53pm

from observation https://network.satnogs.org/observations/1369016/

SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316709
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316709<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566440170;316709;3286;22
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566440180;316710;3287;22
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316711
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316711<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566440190;316711;3288;22
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316712
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316712<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566440200;316712;3287;22
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316715
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316715<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316716
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316716<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316717
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 316717<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 316718
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 317594
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 317594<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566453100;317594;3292;26
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;RL;1532951633,3231;9743;29;29
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;MS;1532951633;29;202;-539
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;RL;1532951634,3214;9733;28;28
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;MS;1532951634;37;46;-393
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:A1;FLAGS;218 137 251 5418 59177 104
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 317596
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 317596<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566453128;317596;3297;26
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;RL;1532951633,3232;9746;29;30
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;MS;1532951633;28;202;-735
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;RL;1532951634,3215;9739;28;28
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;MS;1532951634;38;44;-425
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:A1;FLAGS;218 137 123 5418 59305 0
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:=KrakSat START U2!<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 317597
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1:= BOOT NR 317597<0x00>
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566453142;317597;3294;26
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;RL;1532951633,3232;9743;29;30
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;MS;1532951633;33;202;-569
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;RL;1532951634,3215;9739;28;28
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;MS;1532951634;38;45;-434
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:A1;FLAGS;218 137 251 5418 18345 0
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 317598
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566453156;317598;3294;26
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;RL;1532951633,3232;9740;29;30
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;MS;1532951633;29;202;522
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;RL;1532951634,3214;9733;28;28
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;MS;1532951634;37;45;-421
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:A1;FLAGS;218 137 123 5418 26025 118
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:KrakSat START U1!
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR: BOOT NR 317599
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;STS;00000000000000000000000000001100
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:M1;LOG;1566453170;317599;3293;26
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;RL;1532951633,3231;9740;29;29
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U1;MS;1532951633;25;202;-121
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:U2;MS;1532951634;37;46;-226
SR9KRA-6>APDST4-6,WIDE1-1,WIDE2-1::SP6ZWR:A1;FLAGS;218 137 123 5418 58793 120

n5fxh · December 14, 2019, 11:32pm

obs https://network.satnogs.org/observations/1369018/

Nothing to say anymore…

yiea · December 15, 2019, 7:59am

Thank you - we’re analysing every observation as soon as it’s published!

DL4PD · December 15, 2019, 9:50am

@yiea: There seems to be some more telemetry in some of those packets! Possibly it is getting above some decent threshold… Maybe you can tell more about that, Alicja?