MIR-SAT1 deployment from the ISS
Dear All,
FYI:
It now official that MIR-SAT1 the first 3B8 satellite (a HAM one) will be deployed on the 22/06/2021 at 10:55 UTC from the ISS (on the local National TV this evening and announced by the Minister of ICT) by JAXA using the KIBO’s robotic arm.
Further details may be obtained at https://spacemauritius.com https://spacemauritius.com/, more information will be publish soon.
To note that experimental decoders (some fine tuning may still be required) are already available: 1) https://www.g0kla.com/pacsat/index.php https://www.g0kla.com/pacsat/index.php, thanks to Chris for his hard work to make it available to the HAM community 2) https://github.com/daniestevez/gr-satellites/blob/mirsat/python/telemetry/mi... https://github.com/daniestevez/gr-satellites/blob/mirsat/python/telemetry/mirsat1.py and thanks also to Daniel (EA4GPZ) his hard work and to have incorporate a decoder in GR-Satellites.
So great to have the support of above experts, I wish to put on records my appreciation for the all their the advices they provided to the 3B8 team and their unconditional support fully in the Ham spirit of brotherhood. “Grand merci Chris et Dani” without you we HAM will not have a clue about what is the status of the bird.
These decoder will be used by local schools and Universities to capture the signals from the bird and hopefully create inspiration for our 3B8 youngsters to space science and STEM per AMSAT Ambassador program goals.
73
Jean Marc (3B8DU)
.
Thanks for the praise Jean Marc.
For those interested Mir-Sat-1 supports the pacsat broadcast protocol and will send ambitiously large 1.3 MB images in broadcast mode. It will be interesting to see if they are receivable. There will be small easily received thumbnails too. Plus a digipeater of course.
WISP may not be able to receive the images because the Pacsat protocol is not followed strictly and I had to make some modifications to support the broadcast files.
For now this is a separate program to decode Mir-Sat-1 though it will likely work fine with FalconSat-3 as well though I have not tested that.
As Jean Marc said, there will likely be another update to the program before launch, but this decodes the broadcast image files and telemetry.
73 Chris
On Sun, Jun 13, 2021, 14:03 Jean Marc Momple jean.marc.momple@gmail.com wrote:
Dear All,
FYI:
It now official that MIR-SAT1 the first 3B8 satellite (a HAM one) will be deployed on the 22/06/2021 at 10:55 UTC from the ISS (on the local National TV this evening and announced by the Minister of ICT) by JAXA using the KIBO’s robotic arm.
Further details may be obtained at https://spacemauritius.com, more information will be publish soon.
To note that experimental decoders (some fine tuning may still be required) are already available:
- https://www.g0kla.com/pacsat/index.php, thanks to Chris for his hard
work to make it available to the HAM community 2) https://github.com/daniestevez/gr-satellites/blob/mirsat/python/telemetry/mi... and thanks also to Daniel (EA4GPZ) his hard work and to have incorporate a decoder in GR-Satellites.
So great to have the support of above experts, I wish to put on records my appreciation for the all their the advices they provided to the 3B8 team and their unconditional support fully in the Ham spirit of brotherhood. “Grand merci Chris et Dani” without you we HAM will not have a clue about what is the status of the bird.
These decoder will be used by local schools and Universities to capture the signals from the bird and hopefully create inspiration for our 3B8 youngsters to space science and STEM per AMSAT Ambassador program goals.
73
Jean Marc (3B8DU)
.
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
Excellent. Congratulations and good luck for the deployment. Two questions spring to mind. 1) What is the transmit duration of a single 1.3MB image ?2) Can a partial image be displayed, or Is there any 'hole filling' in the software so a full image can be collected over 2 or 3 transmission periods? Vy 73 David G0MRF
-----Original Message----- From: Chris Thompson chrisethompson@gmail.com To: Jean Marc Momple jean.marc.momple@gmail.com CC: Amsat BB amsat-bb@amsat.org Sent: Sun, 13 Jun 2021 19:43 Subject: [AMSAT-BB] Re: MIR-SAT1 deployment from the ISS
Thanks for the praise Jean Marc. For those interested Mir-Sat-1 supports the pacsat broadcast protocol and will send ambitiously large 1.3 MB images in broadcast mode. It will be interesting to see if they are receivable. There will be small easily received thumbnails too. Plus a digipeater of course. WISP may not be able to receive the images because the Pacsat protocol is not followed strictly and I had to make some modifications to support the broadcast files. For now this is a separate program to decode Mir-Sat-1 though it will likely work fine with FalconSat-3 as well though I have not tested that. As Jean Marc said, there will likely be another update to the program before launch, but this decodes the broadcast image files and telemetry. 73Chris
On Sun, Jun 13, 2021, 14:03 Jean Marc Momple jean.marc.momple@gmail.com wrote:
Dear All, FYI: It now official that MIR-SAT1 the first 3B8 satellite (a HAM one) will be deployed on the 22/06/2021 at 10:55 UTC from the ISS (on the local National TV this evening and announced by the Minister of ICT) by JAXA using the KIBO’s robotic arm. Further details may be obtained at https://spacemauritius.com, more information will be publish soon. To note that experimental decoders (some fine tuning may still be required) are already available:1) https://www.g0kla.com/pacsat/index.php, thanks to Chris for his hard work to make it available to the HAM community2) https://github.com/daniestevez/gr-satellites/blob/mirsat/python/telemetry/mi... and thanks also to Daniel (EA4GPZ) his hard work and to have incorporate a decoder in GR-Satellites. So great to have the support of above experts, I wish to put on records my appreciation for the all their the advices they provided to the 3B8 team and their unconditional support fully in the Ham spirit of brotherhood. “Grand merci Chris et Dani” without you we HAM will not have a clue about what is the status of the bird. These decoder will be used by local schools and Universities to capture the signals from the bird and hopefully create inspiration for our 3B8 youngsters to space science and STEM per AMSAT Ambassador program goals. 73 Jean Marc (3B8DU) . -----------------------------------------------------------
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
-----------------------------------------------------------
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
David,
Good question. Jean Marc should know the duration of the image transmissions as he has some test recordings. I only have the bytes. There is some overhead as each line is transmitted in a Pacsat broadcast packet and there is a Pacsat File header at the start of the image.
In my tests a partial image is displayed fine. The image is the raw sensor data. They can also be transmitted with a JPEG2000 compression algorithm and then partial images likely won't be possible because decompression will likely fail and even if it does not, the color panes are sent independently one after another.
I implemented reception of the image files and a crude display of the image. Dani has a python script in gr-satellites that does a better job displaying the reconstructed images.
The question of "fills" is a good one. The pacsat protocol supports them and the ground station keeps track of all the holes in the file. But it is unclear so far if anyone other than the command station can send commands to the spacecraft. If you can't transmit requests for holes then it will be difficult to get a complete image I suspect.
73 Chris AC2CZ / G0KLA
On Sun, Jun 13, 2021 at 3:16 PM David G0MRF g0mrf@aol.com wrote:
Excellent. Congratulations and good luck for the deployment.
Two questions spring to mind.
- What is the transmit duration of a single 1.3MB image ?
- Can a partial image be displayed, or Is there any 'hole filling' in the
software so a full image can be collected over 2 or 3 transmission periods?
Vy 73
David G0MRF
-----Original Message----- From: Chris Thompson chrisethompson@gmail.com To: Jean Marc Momple jean.marc.momple@gmail.com CC: Amsat BB amsat-bb@amsat.org Sent: Sun, 13 Jun 2021 19:43 Subject: [AMSAT-BB] Re: MIR-SAT1 deployment from the ISS
Thanks for the praise Jean Marc.
For those interested Mir-Sat-1 supports the pacsat broadcast protocol and will send ambitiously large 1.3 MB images in broadcast mode. It will be interesting to see if they are receivable. There will be small easily received thumbnails too. Plus a digipeater of course.
WISP may not be able to receive the images because the Pacsat protocol is not followed strictly and I had to make some modifications to support the broadcast files.
For now this is a separate program to decode Mir-Sat-1 though it will likely work fine with FalconSat-3 as well though I have not tested that.
As Jean Marc said, there will likely be another update to the program before launch, but this decodes the broadcast image files and telemetry.
73 Chris
On Sun, Jun 13, 2021, 14:03 Jean Marc Momple jean.marc.momple@gmail.com wrote:
Dear All,
FYI:
It now official that MIR-SAT1 the first 3B8 satellite (a HAM one) will be deployed on the 22/06/2021 at 10:55 UTC from the ISS (on the local National TV this evening and announced by the Minister of ICT) by JAXA using the KIBO’s robotic arm.
Further details may be obtained at https://spacemauritius.com, more information will be publish soon.
To note that experimental decoders (some fine tuning may still be required) are already available:
- https://www.g0kla.com/pacsat/index.php, thanks to Chris for his hard
work to make it available to the HAM community 2) https://github.com/daniestevez/gr-satellites/blob/mirsat/python/telemetry/mi... and thanks also to Daniel (EA4GPZ) his hard work and to have incorporate a decoder in GR-Satellites.
So great to have the support of above experts, I wish to put on records my appreciation for the all their the advices they provided to the 3B8 team and their unconditional support fully in the Ham spirit of brotherhood. “Grand merci Chris et Dani” without you we HAM will not have a clue about what is the status of the bird.
These decoder will be used by local schools and Universities to capture the signals from the bird and hopefully create inspiration for our 3B8 youngsters to space science and STEM per AMSAT Ambassador program goals.
73
Jean Marc (3B8DU)
.
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
participants (3)
-
Chris Thompson -
David G0MRF -
Jean Marc Momple