ISS CubeSat Deploment (2021-03-14): TAUSAT-1, OPUSAT-II, GuaraniSat-1 (BIRDS-4), Maya-2 (BIRDS-4), Tsuru (BIRDS-4), RSP-01, WARP-01, STARS-EC

Hi Fredy, the trasponder will be activated after we’ll be sure that all satellite subsystems work as expected:-)

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Hi @PE0SAT, that a good question… JAXA didn’t update us on what is the situation with the other satellite… But I think that yes !
As I’m writng these lines, the live broadcast of the first deployment hasn’t started yet… : https://www.youtube.com/watch?v=_OxEipWBuRI

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A quick update:

Maya-2, Tsuru and GuaraniSat-1 are alive, we have several good observations of them.

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Unfortunately it is a private video… maybe accidentally they didn’t make it public.

I think, the link was to the live stream. Now there is another to the recorded version:

Around the -40 min start the first deploy event.

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Or in this version at 8 min…

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Quick update on what we have seen so far on UHF frequencies. As of 20:30 UTC today’s european pass, all UHF satellites seem active with the exception of STARS-EC CubesatB (its sibling is OK on CW).

We keep monitoring and will issue preliminary TLEs after the next european pass.

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@Idan first packets are in from TAUSAT-1 and decoded in our dashboard:

https://dashboard.satnogs.org/d/scAOflUMk/tausat-1

Congratulations on what looks like a healthy satellite!

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@Idan we’ve got data inside the dashboard!

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One more quick update:
TAUSAT-1 is also alive, congratulation @Idan

OPUSAT-II and RSP-01 are probably received… waiting for more observations to confirm.

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From #satnogs channel in matrix through strf observations, we have received STARS-EC (FSK no signal, CW only from cubesat A). @pierros could add some screenshots?

EDIT I accidentally wrote that FSK was received, but it wasn’t, I’ve fixed it above, sorry for the confusion.

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RSP-01 seems to be alive:

A quick update:

We have some TLE sets generated via strf observations by @cgbsat for 3 of the satellites (one is for the 3 BIRDS4 it fits pretty well one of them but is good for the other too), given that it is a recent deployment the fit is not perfect but it is much better than the ISS TLE set.

TAUSAT-1
1 99770U          21073.75721065  .00000000  00000-0  21190-4 0    08
2 99770  51.6436  89.7770 0003146 111.7296 229.6340 15.49571825    01
STARS-EC
1 99777U          21073.75721065  .00000000  00000-0  21190-4 0    05
2 99777  51.6436  89.7770 0003146 111.7296 228.8408 15.49704026    05
BIRDS4
1 99772U          21073.75721065  .00000000  00000-0  21190-4 0    00
2 99772  51.6436  89.7770 0003146 111.7296 229.3967 15.49600776    03

I’ve changed the TLE for the rest satellites too on the ones above as they have deployed together and should fit better than the ISS TLE set.

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New observations have been scheduled for the next 2 days. A quick summary until now:

  • TAUSAT-1 has been received
  • OPUSAT-II hasn’t been received
  • TSURU has been received
  • MAYA-2 has been received but in the last observations we don’t have many signals of it
  • GUARANISAT-1 has been received
  • RSP-01 has been received but is very faint
  • WARP-01 hasn’t been received
  • STARS-EC both cubesats A and B have been received but only on the CW frequencies, signal of B is very faint

thank you!
So far TAUSAT is functioning as expected :slight_smile:
The TLE you published Is accurate and helps us a lot.

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@Idan:
I’ve seen a huge battery current draw in the last few hours. Any hints possible on what you were doing on the satellite (I do have some thoughts, but won’t like to bias the answer ;))?

New STARS-EC TLE fixed from today’s passes:

1 99777U          21075.20000000  .00000000  00000-0 -47256-3 0    07
2 99777  51.6417  82.6059 0002353  96.6596  18.2089 15.49725214    07

edit: not TAUSAT!

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TAUSAT-1 ID is 99770 !!!

It’s very interesting point. Our theory is that these are the battery heaters.
we will know for sure after we download system logs

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