Re: New fast dsstv mode for amateur satellites.
Thank you very much everyone! I am touched by the enthusiasm :)
Due to the many replies I think
First of all, I2OIM, thank you for the interest!
KF4HR, thank you, also, for your interest. To boost interest in the mode I think I might make a challenge of who can make the most QSOs within, say, 30 days :) Would anyone be interested once the app comes out?
AA4KN, Unfortunately I don't have any videos, since right now the state of the software is a jumbled mess, not unlike goestools (sorry pietern ;)), although goestools is nowhere near as messy as mine. Once it's all patched up I'll release videos of it in operation.
AB6KX, would you have the link to the group? I'm very interested in this. Also freedv is the best!
G3VZV, my respect for the FunCube project is immense. I have received a lot of telemetry, and the bpsk mode is simply fantastic. The only thing is that it doesn't carry a camera, but I assume the next one will (given by your email)?
OK2PNQ, it was me on librespace who tried to receive PSAT-2 😊 Also, my respect for the project is immense. By the way, do you know when (or if) PSAT-3 will launch? PSAT is an exciting mission for me! As for the timetables, I haven't timed it on larger images but I can say that a good-sized (640x320) image can be transmitted without compression in about 50-80 seconds, depending on the level of error correction used.
Thank you very much for everyone's replies and enthusiasm!!
Also, may I take the time to complain that DSP is hard ;)
Sasha
On Thu, Sep 8, 2022 at 3:49 AM Tomáš Urbanec tommypnq@centrum.cz wrote:
Hi Sasha, we are group which designed camera with SSTV downlink on PSAT-2. If you can provide some kind of table with resolution of pics vs. time needed for transmission, that would be a minimum to have something to compare with traditional modes as Robot36, MP73 etc. Tomas OK2PNQ
Dne 7.9.2022 v 19:31 Sasha Tim napsal(a):
Hello everyone,
This is my first time posting here, so please do reprehend me in case I break a few guidelines.
For the last few months, I have been developing a new digital slow scan television mode for amateur satellites. The focus is to still be able to recover a complete image at reasonable speeds. In fact, current tests show that if 100% data recovery is desired, then up to 30% data loss can happen. If resolution is sacrificed, there can be up to 80% loss and still be able to recover the entire image, unlike sstv and other scanline systems. Also, a noise free image (100% recovery) can be received down to about 10dB SNR.
Would some of you be interested in this mode? It’s halfway thru development, and if there is enough interest I will post code on GitHub and this bulletin once it’s finished.
Thank you,
Sasha T
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Sorry, I had a typo in the last email :)
I meant that I would think to answer everything one by one
On Thu, Sep 8, 2022 at 1:46 PM Sasha Tim sasha.nyc09@gmail.com wrote:
Thank you very much everyone! I am touched by the enthusiasm :)
Due to the many replies I think
First of all, I2OIM, thank you for the interest!
KF4HR, thank you, also, for your interest. To boost interest in the mode I think I might make a challenge of who can make the most QSOs within, say, 30 days :) Would anyone be interested once the app comes out?
AA4KN, Unfortunately I don't have any videos, since right now the state of the software is a jumbled mess, not unlike goestools (sorry pietern ;)), although goestools is nowhere near as messy as mine. Once it's all patched up I'll release videos of it in operation.
AB6KX, would you have the link to the group? I'm very interested in this. Also freedv is the best!
G3VZV, my respect for the FunCube project is immense. I have received a lot of telemetry, and the bpsk mode is simply fantastic. The only thing is that it doesn't carry a camera, but I assume the next one will (given by your email)?
OK2PNQ, it was me on librespace who tried to receive PSAT-2 😊 Also, my respect for the project is immense. By the way, do you know when (or if) PSAT-3 will launch? PSAT is an exciting mission for me! As for the timetables, I haven't timed it on larger images but I can say that a good-sized (640x320) image can be transmitted without compression in about 50-80 seconds, depending on the level of error correction used.
Thank you very much for everyone's replies and enthusiasm!!
Also, may I take the time to complain that DSP is hard ;)
Sasha
On Thu, Sep 8, 2022 at 3:49 AM Tomáš Urbanec tommypnq@centrum.cz wrote:
Hi Sasha, we are group which designed camera with SSTV downlink on PSAT-2. If you can provide some kind of table with resolution of pics vs. time needed for transmission, that would be a minimum to have something to compare with traditional modes as Robot36, MP73 etc. Tomas OK2PNQ
Dne 7.9.2022 v 19:31 Sasha Tim napsal(a):
Hello everyone,
This is my first time posting here, so please do reprehend me in case I break a few guidelines.
For the last few months, I have been developing a new digital slow scan television mode for amateur satellites. The focus is to still be able
to
recover a complete image at reasonable speeds. In fact, current tests show that if 100% data recovery is desired, then up to 30% data loss
can
happen. If resolution is sacrificed, there can be up to 80% loss and still be able to recover the entire image, unlike sstv and other scanline systems. Also, a noise free image (100% recovery) can be received down to about 10dB SNR.
Would some of you be interested in this mode? It’s halfway thru development, and if there is enough interest I will post code on GitHub and this bulletin once it’s finished.
Thank you,
Sasha T
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
Hi Sasha,
PSAT-2 was our success thanks to offering the ride by Bob Bruninga. Unfortunately with his loss, PSAT-3 is unlikely. But camera experiment continues and is integrated in some pocked qubes of colleagues from EA. So if your mode will be available, we can implement it in the new firmware versions. So keep us informed.
73! de Tomas OK2PNQ
Dne 08/09/2022 v 19:46 Sasha Tim napsal(a):
Thank you very much everyone! I am touched by the enthusiasm :)
Due to the many replies I think
First of all, I2OIM, thank you for the interest!
KF4HR, thank you, also, for your interest. To boost interest in the mode I think I might make a challenge of who can make the most QSOs within, say, 30 days :) Would anyone be interested once the app comes out?
AA4KN, Unfortunately I don't have any videos, since right now the state of the software is a jumbled mess, not unlike goestools (sorry pietern ;)), although goestools is nowhere near as messy as mine. Once it's all patched up I'll release videos of it in operation.
AB6KX, would you have the link to the group? I'm very interested in this. Also freedv is the best!
G3VZV, my respect for the FunCube project is immense. I have received a lot of telemetry, and the bpsk mode is simply fantastic. The only thing is that it doesn't carry a camera, but I assume the next one will (given by your email)?
OK2PNQ, it was me on librespace who tried to receive PSAT-2 😊 Also, my respect for the project is immense. By the way, do you know when (or if) PSAT-3 will launch? PSAT is an exciting mission for me! As for the timetables, I haven't timed it on larger images but I can say that a good-sized (640x320) image can be transmitted without compression in about 50-80 seconds, depending on the level of error correction used.
Thank you very much for everyone's replies and enthusiasm!!
Also, may I take the time to complain that DSP is hard ;)
Sasha
On Thu, Sep 8, 2022 at 3:49 AM Tomáš Urbanec tommypnq@centrum.cz wrote:
Hi Sasha, we are group which designed camera with SSTV downlink on PSAT-2. If you can provide some kind of table with resolution of pics vs. time needed for transmission, that would be a minimum to have something to compare with traditional modes as Robot36, MP73 etc.          Tomas OK2PNQ Dne 7.9.2022 v 19:31 Sasha Tim napsal(a): > Hello everyone, > > This is my first time posting here, so please do reprehend me in case I > break a few guidelines. > > For the last few months, I have been developing a new digital slow scan > television mode for amateur satellites. The focus is to still be able to > recover a complete image at reasonable speeds. In fact, current tests > show that if 100% data recovery is desired, then up to 30% data loss can > happen. If resolution is sacrificed, there can be up to 80% loss and > still be able to recover the entire image, unlike sstv and other > scanline systems. Also, a noise free image (100% recovery) can be > received down to about 10dB SNR. > > Would some of you be interested in this mode? It’s halfway thru > development, and if there is enough interest I will post code on GitHub > and this bulletin once it’s finished. > > Thank you, > > Sasha T > > > > > > > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org <http://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 <http://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 athttps://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 athttps://mailman.amsat.org
participants (2)
-
Sasha Tim -
Tomáš Urbanec