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CX2SA > SATDIG 22.10.14 14:10l 509 Lines 18864 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Going Digital Someday (JoAnne Maenpaa)
2. Re: Going Digital Someday (Stefan Wagener)
3. Re: Going Digital Someday (Doug - k4gkj)
4. Re: Going Digital Someday (JoAnne Maenpaa)
5. Re: Going Digital Someday (JoAnne Maenpaa)
6. Re: Going Digital Someday (Pavel Milanes Costa)
----------------------------------------------------------------------
Message: 1
Date: Tue, 21 Oct 2014 16:10:53 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Going Digital Someday
Message-ID: <006d01cfed73$7fff1840$7ffd48c0$@xxx>
Content-Type: text/plain; charset="us-ascii"
During the Symposium in Baltimore last week there was a discussion that I
found quite interesting. Billed as a proposal for fairly long-term, future
AMSAT HEO possibilities, this blue-sky proposal offers projects that will be
fun for myself (and maybe yourself) to learn what's next ... or could be
next ...
It seems the cubesat form factor is here to stay for practical launch
opportunities available to us ... (please don't ask for getting a phase
III-B form factor in this thread!) Wiser people than myself have assured me
of this.
Analog SSB and CW modulation in a 3U to 6U cubesat may not be practical at
HEO apogee due to antenna size limits on a cubesat and power generation
capability of the cubesat limited number of solar cells. Digital techniques
were described as a way to make this work.
FreeDV HF Digital Voice for Radio Amateurs was one of the types of
technologies mentioned just as an example. I found a demonstration at:
http://nicktoday.com/freedv-hf-digital-voice-radio-amateurs/
Interesting, eh? A soundcard interface to your existing radio, sound card in
the PC, we're teaching ourselves the first steps into digital radio ...
getting ready for the future.
I've only had to interface my soundcard interface to my Yaesu 857D just
once. The interface remains stable from a hardware point of view. My PC runs
the appropriate software for FUNcube telemetry, SSTV from ISS and prior
ARISSat-1, PSK31, JT65, RTTY ... and when I get some time in between
preparing the next issue of the Journal I'll add the software for the FreeDV
codec.
Perhaps we'll hear more interesting ideas or a fresh approach! At least we
could have a thread with some fun discussion ...
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
AMSAT VP User Services
------------------------------
Message: 2
Date: Tue, 21 Oct 2014 20:08:34 -0500
From: Stefan Wagener <wageners@xxxxx.xxx>
To: JoAnne Maenpaa <k9jkm@xxxxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Going Digital Someday
Message-ID:
<CAKu8kHAr57FVfYFX_MY0_xHB9L44UeHt4e8045wLSOG309kP_g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Point well made, JoAnne.
Now, can AMSAT official support this mode, maybe help/encourage the
developers and start to implement it (testing) on for example FO-29? What
about a digital mode for the FM satellites? One of the big frustration I
have is to decide which one of the digital modes to pick. What is beautiful
about this hobby is the diversification which now also becomes the "curse"
with promotion and competition of various commercial and open source
modes/codecs. Maybe we can help and focus on one "system" for amateur
satellite use and get it used/implemented.
Food for thought,
Stefan, VE4NSA
On Tue, Oct 21, 2014 at 4:10 PM, JoAnne Maenpaa <k9jkm@xxxxxxx.xxx> wrote:
> During the Symposium in Baltimore last week there was a discussion that I
> found quite interesting. Billed as a proposal for fairly long-term, future
> AMSAT HEO possibilities, this blue-sky proposal offers projects that will
> be
> fun for myself (and maybe yourself) to learn what's next ... or could be
> next ...
>
> It seems the cubesat form factor is here to stay for practical launch
> opportunities available to us ... (please don't ask for getting a phase
> III-B form factor in this thread!) Wiser people than myself have assured me
> of this.
>
> Analog SSB and CW modulation in a 3U to 6U cubesat may not be practical at
> HEO apogee due to antenna size limits on a cubesat and power generation
> capability of the cubesat limited number of solar cells. Digital techniques
> were described as a way to make this work.
>
> FreeDV HF Digital Voice for Radio Amateurs was one of the types of
> technologies mentioned just as an example. I found a demonstration at:
> http://nicktoday.com/freedv-hf-digital-voice-radio-amateurs/
>
> Interesting, eh? A soundcard interface to your existing radio, sound card
> in
> the PC, we're teaching ourselves the first steps into digital radio ...
> getting ready for the future.
>
> I've only had to interface my soundcard interface to my Yaesu 857D just
> once. The interface remains stable from a hardware point of view. My PC
> runs
> the appropriate software for FUNcube telemetry, SSTV from ISS and prior
> ARISSat-1, PSK31, JT65, RTTY ... and when I get some time in between
> preparing the next issue of the Journal I'll add the software for the
> FreeDV
> codec.
>
> Perhaps we'll hear more interesting ideas or a fresh approach! At least we
> could have a thread with some fun discussion ...
>
> --
> 73 de JoAnne K9JKM
> k9jkm@xxxxx.xxx
> AMSAT VP User Services
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 3
Date: Tue, 21 Oct 2014 21:51:55 -0400
From: Doug - k4gkj <k4gkj@xxxxxxxxxx.xxx>
To: wageners@xxxxx.xxxx k9jkm@xxxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Going Digital Someday
Message-ID: <4dp4sgc0y17qvkr5gewcgbo2.1413942666147@xxxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
How about fldigi? It offers several modes, not too many, but allows for some
room for everyone to explore their favorite mode.....?
Other software programs can run these same modes, but if we promote the one
package (fldigi), we hope to limit the mides to a few popular modes rather
than a free-for-all.......?
Just a thought.... Open to anything myself....?
Doug
K4GKJ?
Doug Bennight
K4GKJ
850-528-5772
850-926-2052?
-------- Original message --------
From: Stefan Wagener <wageners@xxxxx.xxx>
Date:
To: JoAnne Maenpaa <k9jkm@xxxxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Going Digital Someday
Point well made, JoAnne.
Now, can AMSAT official support this mode, maybe help/encourage the
developers and start to implement it (testing) on for example FO-29? What
about a digital mode for the FM satellites? One of the big frustration I
have is to decide which one of the digital modes to pick. What is beautiful
about this hobby is the diversification which now also becomes the "curse"
with promotion and competition of various commercial and open source
modes/codecs. Maybe we can help and focus on one "system" for amateur
satellite use and get it used/implemented.
Food for thought,
Stefan, VE4NSA
On Tue, Oct 21, 2014 at 4:10 PM, JoAnne Maenpaa <k9jkm@xxxxxxx.xxx> wrote:
> During the Symposium in Baltimore last week there was a discussion that I
> found quite interesting. Billed as a proposal for fairly long-term, future
> AMSAT HEO possibilities, this blue-sky proposal offers projects that will
> be
> fun for myself (and maybe yourself) to learn what's next ... or could be
> next ...
>
> It seems the cubesat form factor is here to stay for practical launch
> opportunities available to us ... (please don't ask for getting a phase
> III-B form factor in this thread!) Wiser people than myself have assured me
> of this.
>
> Analog SSB and CW modulation in a 3U to 6U cubesat may not be practical at
> HEO apogee due to antenna size limits on a cubesat and power generation
> capability of the cubesat limited number of solar cells. Digital techniques
> were described as a way to make this work.
>
> FreeDV HF Digital Voice for Radio Amateurs was one of the types of
> technologies mentioned just as an example. I found a demonstration at:
> http://nicktoday.com/freedv-hf-digital-voice-radio-amateurs/
>
> Interesting, eh? A soundcard interface to your existing radio, sound card
> in
> the PC, we're teaching ourselves the first steps into digital radio ...
> getting ready for the future.
>
> I've only had to interface my soundcard interface to my Yaesu 857D just
> once. The interface remains stable from a hardware point of view. My PC
> runs
> the appropriate software for FUNcube telemetry, SSTV from ISS and prior
> ARISSat-1, PSK31, JT65, RTTY ... and when I get some time in between
> preparing the next issue of the Journal I'll add the software for the
> FreeDV
> codec.
>
> Perhaps we'll hear more interesting ideas or a fresh approach! At least we
> could have a thread with some fun discussion ...
>
> --
> 73 de JoAnne K9JKM
> k9jkm@xxxxx.xxx
> AMSAT VP User Services
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Tue, 21 Oct 2014 21:01:15 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
Cc: "'AMSAT BB'" <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Going Digital Someday
Message-ID: <009f01cfed9c$10057d30$30107790$@xxx>
Content-Type: text/plain; charset="utf-8"
Stefan brought up the point ...
> ... AMSAT official support this mode, maybe help/encourage
> the developers and start to implement it (testing) on for
> example FO-29?
The best thing about standards is that there are plenty to choose from!
I'm guessing the only endorsement we'd get on behalf of AMSAT is to find out
what works best ... and report back. For phone operation FreeDV seems to be
getting a following in the amateur radio world. Perhaps we'll hear on this
thread which additional opportunities exist.
FreeDV bandwidth claiming 1/3 the bandwidth of a conventional SSB signal
probably won't hurt any of the linear transponders. We don't control FO-29
but suitably equipped stations on each end could probably give it a go ...
such as those instances where guys have tried SSTV through a satellite. No
special permission was needed. We might need to figure out how FreeDV and
Doppler get along together.
We have plenty of time to try this. That HEO proposal is barely more than a
verbal proposal and slides from the symposium. It is in that exciting phase
where many things are possible and no one can say which way it will go ...
or if it will go.
I bet we could have lots of fun with many soundcard modes that fit in a
radio's audio bandwidth. FreeDV trying to QSO with a WSJT flavor might not
work well however ;-)
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
------------------------------
Message: 5
Date: Tue, 21 Oct 2014 22:30:46 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
Cc: <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Going Digital Someday
Message-ID: <00a901cfeda8$91b83190$b52894b0$@xxx>
Content-Type: text/plain; charset="utf-8"
> How about fldigi? It offers several modes, not too many,
Quite true ... Fldigi is a cool tool set. A lot of the high altitude balloon
crowd seems to have found this program useful as well. Once you get your
soundcard interface working with your radio and computer there are many
options.
Using my 857D interfaced to an old WinXP box with a soundcard I can switch
between JT65-HF, 1200 baud packet for ISS, receive AO-73 telemetry. Once I
wrap up the November/December Journal I'll add FreeDV. No hardware changes
needed ... click on a different icon and you have your new features/new mode.
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
------------------------------
Message: 6
Date: Wed, 22 Oct 2014 01:21:03 -0400
From: Pavel Milanes Costa <co7wt@xxxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Going Digital Someday
Message-ID: <54473EBF.9060204@xxxxxx.xx.xx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Hi
fldigi does olivia and contestia, two modes that are tolerant to
miss-tuning of a signal, that seems to me like a good candidates for
beating doppler shifting, these modes are slow, sure but have
respectable numbers in S/N ratio, these are a good candidates for
satellite...
Does anyone have tried any of this modes on a SSB/FM bird?
The lighting fast multi-bpsk modes with auto RF-ID are another option
for beating doppler... and are only 2.4 Khz wide...
BTW fldigi is open source, you can SEE and REVIEW/MODIFY the code, even
with the help of the development team we can work together and get our
custom "satellite modes" in it...
I'm the Spanish UI translator for Fldigi...
73
El 21/10/14 21:51, Doug - k4gkj escribi?:
> How about fldigi? It offers several modes, not too many, but allows for
some room for everyone to explore their favorite mode.....
> Other software programs can run these same modes, but if we promote the
one package (fldigi), we hope to limit the mides to a few popular modes
rather than a free-for-all.......
> Just a thought.... Open to anything myself....
>
> Doug
> K4GKJ
>
>
> Doug Bennight
> K4GKJ
> 850-528-5772
> 850-926-2052
>
>
>
>
> -------- Original message --------
> From: Stefan Wagener <wageners@xxxxx.xxx>
> Date:
> To: JoAnne Maenpaa <k9jkm@xxxxxxx.xxx>
> Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
> Subject: Re: [amsat-bb] Going Digital Someday
>
> Point well made, JoAnne.
>
> Now, can AMSAT official support this mode, maybe help/encourage the
> developers and start to implement it (testing) on for example FO-29? What
> about a digital mode for the FM satellites? One of the big frustration I
> have is to decide which one of the digital modes to pick. What is beautiful
> about this hobby is the diversification which now also becomes the "curse"
> with promotion and competition of various commercial and open source
> modes/codecs. Maybe we can help and focus on one "system" for amateur
> satellite use and get it used/implemented.
>
> Food for thought,
>
> Stefan, VE4NSA
>
> On Tue, Oct 21, 2014 at 4:10 PM, JoAnne Maenpaa <k9jkm@xxxxxxx.xxx> wrote:
>
>> During the Symposium in Baltimore last week there was a discussion that I
>> found quite interesting. Billed as a proposal for fairly long-term, future
>> AMSAT HEO possibilities, this blue-sky proposal offers projects that will
>> be
>> fun for myself (and maybe yourself) to learn what's next ... or could be
>> next ...
>>
>> It seems the cubesat form factor is here to stay for practical launch
>> opportunities available to us ... (please don't ask for getting a phase
>> III-B form factor in this thread!) Wiser people than myself have assured me
>> of this.
>>
>> Analog SSB and CW modulation in a 3U to 6U cubesat may not be practical at
>> HEO apogee due to antenna size limits on a cubesat and power generation
>> capability of the cubesat limited number of solar cells. Digital techniques
>> were described as a way to make this work.
>>
>> FreeDV HF Digital Voice for Radio Amateurs was one of the types of
>> technologies mentioned just as an example. I found a demonstration at:
>> http://nicktoday.com/freedv-hf-digital-voice-radio-amateurs/
>>
>> Interesting, eh? A soundcard interface to your existing radio, sound card
>> in
>> the PC, we're teaching ourselves the first steps into digital radio ...
>> getting ready for the future.
>>
>> I've only had to interface my soundcard interface to my Yaesu 857D just
>> once. The interface remains stable from a hardware point of view. My PC
>> runs
>> the appropriate software for FUNcube telemetry, SSTV from ISS and prior
>> ARISSat-1, PSK31, JT65, RTTY ... and when I get some time in between
>> preparing the next issue of the Journal I'll add the software for the
>> FreeDV
>> codec.
>>
>> Perhaps we'll hear more interesting ideas or a fresh approach! At least we
>> could have a thread with some fun discussion ...
>>
>> --
>> 73 de JoAnne K9JKM
>> k9jkm@xxxxx.xxx
>> AMSAT VP User Services
>>
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
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.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 9, Issue 362
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