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CX2SA > SATDIG 05.09.13 15:20l 926 Lines 32045 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: A0 40 replacement - mode K cubesat? (Ross Whenmouth)
2. Re: A0 40 replacement - mode K cubesat? (Ross Whenmouth)
3. Re: A0 40 replacement - mode K cubesat? (David Johnson)
4. Re: ISS SSTV Active on 145.800Mhz (PE0SAT | Amateur Radio)
5. Re: A0 40 replacement (Nick Pugh K5QXJ)
6. Re: A0 40 replacement (Nick Pugh K5QXJ)
7. Re: AO-40 Replacement (Nick Pugh K5QXJ)
8. R: Re: ISS SSTV Active on 145.800Mhz (Claudio Ariotti, IK1SLD)
9. Re: R: Re: ISS SSTV Active on 145.800Mhz (Fabiano Moser)
10. Re: A0 40 replacement (Prof. Arnaldo Coro Antich)
11. Re: A0 40 replacement (Alan)
12. A0 40 replacement (PSK31-Best of FM and Linear!) (Robert Bruninga)
13. D STAR AMsat users net (damon runion)
----------------------------------------------------------------------
Message: 1
Date: Thu, 05 Sep 2013 19:09:02 +1200
From: Ross Whenmouth <ross@xxxxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement - mode K cubesat?
Message-ID: <52282E0E.6060102@xxxxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
How feasible is it to fly a mode K (15m uplink, 10m downlink) linear
transponder on a cubesat?
I expect that retty much any ham with an HF transceiver would be able to
work this bird, and I expect that due to the lower frequency, the
footprint might be a bit larger than that of VHF/UHF bird in the same
orbit and doppler shift would only be about 7% of that experienced on 70cm.
The biggest problem that I see though is squeezing a somewhat efficient
10m antenna into a cubesat and deploying it by remote control once on
orbit. (I think that the cubesat antenna should be optimised for TX
performance, as cubesat TX EIRP capability is severely limited compared
to the average HF transceiver).
Would two 2.5m lengths of steel tape (the same stuff that tape measures
are made out of) - mounted on opposing sides of the cubesat, be able to
unroll in microgravity to form a generally straight 1/2 wave dipole with
a low risk of tangling, snagging or kinking, etc?
Alternately, what about using some sort of thin plastic tubing
(something like dialysis tubing, but suited to the space environment?)
with a wire inside it, and rolled up. Then, once on orbit, the tubing is
inflated with self-expanding polyurethane foam, which will extend the
tube (and the wire inside it). The foam will then harden, so future loss
of gas pressure in the plastic tube (micrometeorites?) will not cause
failure of the antenna?
73 ZL2WRW Ross Whenmouth
------------------------------
Message: 2
Date: Thu, 05 Sep 2013 19:09:37 +1200
From: Ross Whenmouth <ross@xxxxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement - mode K cubesat?
Message-ID: <52282E31.8030706@xxxxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
How feasible is it to fly a mode K (15m uplink, 10m downlink) linear
transponder on a cubesat?
I expect that pretty much any ham with an HF transceiver would be able
to work this bird, and I expect that due to the lower frequency, the
footprint might be a bit larger than that of VHF/UHF bird in the same
orbit and the Doppler shift would only be about 7% of that experienced
on 70cm.
The biggest problem that I see though is squeezing a somewhat efficient
10m antenna into a cubesat and deploying it by remote control once on
orbit. (I think that the cubesat antenna should be optimised for TX
performance, as cubesat TX EIRP capability is severely limited compared
to the average HF transceiver).
Would two 2.5m lengths of steel tape (the same stuff that tape measures
are made out of) - mounted on opposing sides of the cubesat, be able to
unroll in microgravity to form a generally straight 1/2 wave dipole with
a low risk of tangling, snagging or kinking, etc?
Alternately, what about using some sort of thin plastic tubing
(something like dialysis tubing, but suited to the space environment?)
with a wire inside it, and rolled up. Then, once on orbit, the tubing is
inflated with self-expanding polyurethane foam, which will extend the
tube (and the wire inside it). The foam will then harden, so future loss
of gas pressure in the plastic tube (micrometeorites?) will not cause
failure of the antenna?
73 ZL2WRW Ross Whenmouth
------------------------------
Message: 3
Date: Thu, 05 Sep 2013 09:15:39 +0100
From: David Johnson <dave@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxxx ross@xxxxxxx.xx.xx
Subject: [amsat-bb] Re: A0 40 replacement - mode K cubesat?
Message-ID: <52283DAB.8030502@xxxxx.xx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
ZACUBE is a HF beacon. Something like this may be a foundation for what
you're suggesting.
http://amsat-uk.org/2012/08/25/14099-khz-cput-cubesat-to-launch-end-of-novembe
r/
It's riding along with FUNcube in the same POD. Take a look at this
page, about half way down you'll see the ZACUBE deployment mechanism.
http://amsat-uk.org/2013/09/04/funcube-1-is-in-its-pod/
73
Dave
On 05/09/13 08:09, Ross Whenmouth wrote:
> Hi,
>
> How feasible is it to fly a mode K (15m uplink, 10m downlink) linear
> transponder on a cubesat?
>
> I expect that retty much any ham with an HF transceiver would be able
> to work this bird, and I expect that due to the lower frequency, the
> footprint might be a bit larger than that of VHF/UHF bird in the same
> orbit and doppler shift would only be about 7% of that experienced on
> 70cm.
>
> The biggest problem that I see though is squeezing a somewhat
> efficient 10m antenna into a cubesat and deploying it by remote
> control once on orbit. (I think that the cubesat antenna should be
> optimised for TX performance, as cubesat TX EIRP capability is
> severely limited compared to the average HF transceiver).
>
> Would two 2.5m lengths of steel tape (the same stuff that tape
> measures are made out of) - mounted on opposing sides of the cubesat,
> be able to unroll in microgravity to form a generally straight 1/2
> wave dipole with a low risk of tangling, snagging or kinking, etc?
>
> Alternately, what about using some sort of thin plastic tubing
> (something like dialysis tubing, but suited to the space environment?)
> with a wire inside it, and rolled up. Then, once on orbit, the tubing
> is inflated with self-expanding polyurethane foam, which will extend
> the tube (and the wire inside it). The foam will then harden, so
> future loss of gas pressure in the plastic tube (micrometeorites?)
> will not cause failure of the antenna?
>
>
> 73 ZL2WRW Ross Whenmouth
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> 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: Thu, 05 Sep 2013 10:34:43 +0200
From: PE0SAT | Amateur Radio <pe0sat@xxxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: ISS SSTV Active on 145.800Mhz
Message-ID: <92d5ca589e9ed771321c0ca9a5ad8faa@xxxxx.xx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Hi Cor,
Via this link: http://www.pe0sat.vgnet.nl/2013/iss-sstv-reception/ you
can download
the SSTV images I received yesterday.
73 Jan PE0SAT
On 04-09-2013 20:47, Cor . wrote:
> Hello All,
>
> Several ISS SSTV images are received from several ground stations.
> See ISS SSTV images and info:
> http://ariss-sstv.blogspot.nl/
> http://www.dk3wn.info/satblog.shtml
>
> I asume the Russian ISS crew have sended 4 different SSTV images
> today.
> If someone have received other images please send them to
> me via e-mail (see my QRZ.com page).
>
> Tommorow Sept. 5 between 09:00 and 10:40 UTC last day of the event.
>
>
> 73's Cor PD0RKC
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
> author.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
--
With regards PE0SAT
Internet web-page http://www.pe0sat.vgnet.nl/
------------------------------
Message: 5
Date: Thu, 5 Sep 2013 03:55:49 -0500
From: "Nick Pugh K5QXJ" <quadpugh@xxxxxxxxx.xxx>
To: "'Michael'" <Mat_62@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <00d801ceaa15$b83306b0$28991410$@xxx>
Content-Type: text/plain; charset="us-ascii"
If you vote for Bryan for the AMSAT board he is committed to a HEO
nick
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Michael
Sent: Wednesday, September 04, 2013 4:25 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
I'm almost fifty one years old and I'm now convinced that we will not see
another HEO in orbit in my lifetime...if ever. The economic environment to
do it just doesn't exist anymore. AMSAT has as much as told everyone that by
abandoning their efforts and concentrating on LEO cubesats. No one is
going to come out and say that we absolutely will never have one, they like
to keep that glimmer of hope alive but the
writing is on the wall. No one wants to be wrong more than I do but
I'd bet you P3-E never flies.
73,
Michael, W4HIJ
On 9/3/2013 3:32 PM, John Becker wrote:
> Anything new on a replacement.
> Have not see a thing myself.
>
> John
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> 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. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Thu, 5 Sep 2013 04:10:19 -0500
From: "Nick Pugh K5QXJ" <quadpugh@xxxxxxxxx.xxx>
To: <tosca005@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <00df01ceaa17$be955330$3bbff990$@xxx>
Content-Type: text/plain; charset="iso-8859-1"
John
IT turns out that launch opportunities relativity plentiful what lacking is
AMSAT vision and calibration with a university that has propulsion
technology. See short video url
http://www.youtube.com/watch?v=9DIxnO3CGrY
Thanks
?
nick ARS K5QXJ EM30xa 30.1N 92.1W
Office 337 593 8700
Cell????? 337 258 2527
?
Helping UL become a world Class Engineering ?and Educational School
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of tosca005@xxx.xxx
Sent: Wednesday, September 04, 2013 5:53 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
As long as AMSAT-NA needs to concentrate on 1U/3U/6U Cubesats for the
immediatee future, I would really like to see the pursuit of linear
transponders on them instead of single-channel FM repeaters. The way I see
it, launch opportunities are so rare that we ought to fly the most capable
equipment we can on those rare occasions when we can get a launch.
John Toscano
W0JT
Amsat-Na LM#2292
On Sep 4 2013, n0jy wrote:
>Hi Michael,
>
>I would not say that AMSAT has abandoned HEO. Rather, launch
>opportunities that exist now are being utilized. Would you rather sit
>dormant and let all existing birds fail or re-enter while waiting for
>an HEO opportunity?
>And AMSAT is just learning to build cubesats. For AMSAT-NA, Fox-1 is a
>first. If we're going to fly HEO, we had better be good at building a
>reliable satellite in a cubesat (be it 1, 3, or 6U) format. The first
>HEO launch opportunity is not the time to figure that out!
>While HEO launch opportunities do not exist now, but that does not mean
>that AMSAT isn't pursuing them as Drew pointed out, nor that AMSAT
>would not build an HEO satellite when opportunities do come. In the
>meantime, we are making lemonade and preparing through practice.
>
>Jerry
>N0JY
>
>On 9/4/2013 4:25 PM, Michael wrote:
>> I'm almost fifty one years old and I'm now convinced that we will not
>> see another HEO in orbit in my lifetime...if ever. The economic
>> environment to do it just doesn't exist anymore. AMSAT has as much as
>> told everyone that by abandoning their efforts and concentrating on
>> LEO cubesats. No one is going to come out and say that we absolutely
>> will never have one, they like to keep that glimmer of hope alive but
>> the writing is on the wall. No one wants to be wrong more than I do
>> but I'd bet you P3-E never flies.
>> 73,
>> Michael, W4HIJ
>>
>> On 9/3/2013 3:32 PM, John Becker wrote:
>>> Anything new on a replacement.
>>> Have not see a thing myself.
>>>
>>> John
>>>
>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>>> 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. Opinions expressed are those of the author.
>> 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. Opinions expressed are those of the author.
>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. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Thu, 5 Sep 2013 04:16:37 -0500
From: "Nick Pugh K5QXJ" <quadpugh@xxxxxxxxx.xxx>
To: "'Clint Bradford'" <clintbrad4d@xxxxxxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-40 Replacement
Message-ID: <00e001ceaa18$a0e285a0$e2a790e0$@xxx>
Content-Type: text/plain; charset="iso-8859-1"
Please watch this short video it give a path to HEO
http://www.youtube.com/watch?v=TpGnxlZC8Hs
Thanks
?
nick ARS K5QXJ EM30xa 30.1N 92.1W
Office 337 593 8700
Cell????? 337 258 2527
?
Helping UL become a world Class Engineering ?and Educational School
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Clint Bradford
Sent: Wednesday, September 04, 2013 7:28 PM
To: amsat-bb@xxxxx.xxxx amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: AO-40 Replacement
>> ... launch opportunities are so rare that we ought to
fly the most capable equipment we can on those rare occasions when we can
get a launch ...
Perhaps we should define, "most capable equipment." And we also need to
define "bang for the buck."
What should a ham satellite program offer to the amateur community?
If bringing new hams into this aspect of the hobby is important, then we
need another AO-51 - which was probably the greatest marketing tool ever
seen in the amateur satellite community. Its ease of use was the cause of
scores of media alerts and publicity for amateur radio.
And most importantly, it got more people looking skyward and thinking they
could work amateur satellites than any other project.
Then there was the marvelous marketing surrounding ARISSat-1 ...
What else should an amateur satellite program offer? Many here want
satellites that are only accessible with an investment of many hundreds of
dollars' worth of antenna systems and equipment. (Some would actually love
it if Technicians weren't allowed - that's how extreme thinking is on this
topic.) Is THAT what will move the hobby forward for the masses?
IS there a "middle ground?" Sure is a polarized topic (pun intended). Some
want the hobby and sat use to grow ... others want to exclude as many fellow
hams as possible.
Clint Bradford K6LCS
http://www.work-sat.com
----------------------------------
Clint Bradford, K6LCS
http://www.clintbradford.com
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Thu, 5 Sep 2013 11:22:20 +0200
From: "Claudio Ariotti, IK1SLD" <claudio@xxxxxxx.xxx>
To: "'PE0SAT | Amateur Radio'" <pe0sat@xxxxx.xx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] R: Re: ISS SSTV Active on 145.800Mhz
Message-ID: <EFDD851A33E345E481FD1AC61EDBF57F@xxxxxx.xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Jan, about your comment I read on your web, the Luca Parmitano don't use
the Kenwood TM-D710, this radio is used by Russian crew.
The MAI-75 Experiment is a Russian experiment and the crew activates it when
Moscow has AOS, so we lost 50% of the pass.
Luca only use the Ericsson radio in the Columbus module.
73 Claudio IK1SLD
-----Messaggio originale-----
Da: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx Per conto
di PE0SAT | Amateur Radio
Inviato: gioved? 5 settembre 2013 10:35
A: amsat-bb@xxxxx.xxx
Oggetto: [amsat-bb] Re: ISS SSTV Active on 145.800Mhz
Hi Cor,
Via this link: http://www.pe0sat.vgnet.nl/2013/iss-sstv-reception/ you can
download the SSTV images I received yesterday.
73 Jan PE0SAT
On 04-09-2013 20:47, Cor . wrote:
> Hello All,
>
> Several ISS SSTV images are received from several ground stations.
> See ISS SSTV images and info:
> http://ariss-sstv.blogspot.nl/
> http://www.dk3wn.info/satblog.shtml
>
> I asume the Russian ISS crew have sended 4 different SSTV images
> today.
> If someone have received other images please send them to
> me via e-mail (see my QRZ.com page).
>
> Tommorow Sept. 5 between 09:00 and 10:40 UTC last day of the event.
>
>
> 73's Cor PD0RKC
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
> author.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
--
With regards PE0SAT
Internet web-page http://www.pe0sat.vgnet.nl/
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Thu, 5 Sep 2013 11:57:11 +0100
From: Fabiano Moser <fabianomoser@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: R: Re: ISS SSTV Active on 145.800Mhz
Message-ID:
<CAM6o-mbn0tR=dTtO3UUWD+rKdzP5t1133rojBurZtJ8xiMfv+A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi,
SSTV active with problems, PTT was activated but no audio, then after
20seconds? the audio started and goes out before the end of image.
PTT still ON without audio till LOS.
On Thu, Sep 5, 2013 at 10:22 AM, Claudio Ariotti, IK1SLD <
claudio@xxxxxxx.xxx> wrote:
>
>
> Hi Jan, about your comment I read on your web, the Luca Parmitano don't use
> the Kenwood TM-D710, this radio is used by Russian crew.
> The MAI-75 Experiment is a Russian experiment and the crew activates it
> when
> Moscow has AOS, so we lost 50% of the pass.
> Luca only use the Ericsson radio in the Columbus module.
>
> 73 Claudio IK1SLD
>
>
> -----Messaggio originale-----
> Da: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx Per
> conto
> di PE0SAT | Amateur Radio
> Inviato: gioved? 5 settembre 2013 10:35
> A: amsat-bb@xxxxx.xxx
> Oggetto: [amsat-bb] Re: ISS SSTV Active on 145.800Mhz
>
> Hi Cor,
>
> Via this link: http://www.pe0sat.vgnet.nl/2013/iss-sstv-reception/ you can
> download the SSTV images I received yesterday.
>
>
> 73 Jan PE0SAT
>
> On 04-09-2013 20:47, Cor . wrote:
> > Hello All,
> >
> > Several ISS SSTV images are received from several ground stations.
> > See ISS SSTV images and info:
> > http://ariss-sstv.blogspot.nl/
> > http://www.dk3wn.info/satblog.shtml
> >
> > I asume the Russian ISS crew have sended 4 different SSTV images
> > today.
> > If someone have received other images please send them to
> > me via e-mail (see my QRZ.com page).
> >
> > Tommorow Sept. 5 between 09:00 and 10:40 UTC last day of the event.
> >
> >
> > 73's Cor PD0RKC
> >
> >
> >
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
> > author.
> > Not an AMSAT-NA member? Join now to support the amateur satellite
> > program!
> > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
> --
> With regards PE0SAT
> Internet web-page http://www.pe0sat.vgnet.nl/
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> 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. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 10
Date: Thu, 05 Sep 2013 07:03:40 -0400
From: "Prof. Arnaldo Coro Antich" <coro@xxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <5228650C.2070407@xxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
High complexity of a ""replacement for hypercomplex AO40"" is not the
answer.
A much simpler satellite is IMHO the way to go.
It will take less time to design , build and test
It will be tipping the scale at less weight.
It will receive a much faster approval by whoever is willing to provide the
launch
It will make possible to reach the in orbit condition in much less time
than what it will take to achieve orbiting by a satellite as complex
as the AO40.
The appearing in the scene of launch vehicles of several previously not
existing "" actors "" , may even provide the possibility of a ""free ride""
in a new launch vehicle demonstration test.
As I see it following a succesfull pattern of transponders configuration
as it was implemented by the AO10 and AO13 designers may be a way
to make the dream of a new , highly reliable and long living High Earth
Orbit satellite really possible.
73 and DX
Arnie Coro
CO2KK
satellite operator with the simplest possible station configuration
that enjoyed very much RS10 another well worth imitating
ham radio satellite
On 09/05/2013 04:55 AM, Nick Pugh K5QXJ wrote:
> If you vote for Bryan for the AMSAT board he is committed to a HEO
>
> nick
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of Michael
> Sent: Wednesday, September 04, 2013 4:25 PM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: A0 40 replacement
>
> I'm almost fifty one years old and I'm now convinced that we will not see
> another HEO in orbit in my lifetime...if ever. The economic environment to
> do it just doesn't exist anymore. AMSAT has as much as told everyone that by
> abandoning their efforts and concentrating on LEO cubesats. No one is
> going to come out and say that we absolutely will never have one, they like
> to keep that glimmer of hope alive but the
> writing is on the wall. No one wants to be wrong more than I do but
> I'd bet you P3-E never flies.
> 73,
> Michael, W4HIJ
>
> On 9/3/2013 3:32 PM, John Becker wrote:
>> Anything new on a replacement.
>> Have not see a thing myself.
>>
>> John
>>
>>
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
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> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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------------------------------
Message: 11
Date: Thu, 5 Sep 2013 06:04:19 -0500
From: Alan <wa4sca@xxxxx.xxx>
To: "'Nick Pugh K5QXJ'" <quadpugh@xxxxxxxxx.xxx>, <tosca005@xxx.xxx>,
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <08385555D49E4EC8A166B3EEC3CEBCEF@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Nick,
Vision is good, but clear vision which tempers hope with reality is essential.
73s,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Nick Pugh K5QXJ
Sent: Thursday, September 05, 2013 4:10 AM
To: tosca005@xxx.xxxx amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
John
IT turns out that launch opportunities relativity plentiful what lacking is
AMSAT vision and calibration with a university that has propulsion
technology. See short video url
http://www.youtube.com/watch?v=9DIxnO3CGrY
Thanks
?
nick ARS K5QXJ EM30xa 30.1N 92.1W
Office 337 593 8700
Cell????? 337 258 2527
?
Helping UL become a world Class Engineering ?and Educational School
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of tosca005@xxx.xxx
Sent: Wednesday, September 04, 2013 5:53 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
As long as AMSAT-NA needs to concentrate on 1U/3U/6U Cubesats for the
immediatee future, I would really like to see the pursuit of linear
transponders on them instead of single-channel FM repeaters. The way I see
it, launch opportunities are so rare that we ought to fly the most capable
equipment we can on those rare occasions when we can get a launch.
John Toscano
W0JT
Amsat-Na LM#2292
On Sep 4 2013, n0jy wrote:
>Hi Michael,
>
>I would not say that AMSAT has abandoned HEO. Rather, launch
>opportunities that exist now are being utilized. Would you rather sit
>dormant and let all existing birds fail or re-enter while waiting for
>an HEO opportunity?
>And AMSAT is just learning to build cubesats. For AMSAT-NA, Fox-1 is a
>first. If we're going to fly HEO, we had better be good at building a
>reliable satellite in a cubesat (be it 1, 3, or 6U) format. The first
>HEO launch opportunity is not the time to figure that out!
>While HEO launch opportunities do not exist now, but that does not mean
>that AMSAT isn't pursuing them as Drew pointed out, nor that AMSAT
>would not build an HEO satellite when opportunities do come. In the
>meantime, we are making lemonade and preparing through practice.
>
>Jerry
>N0JY
>
>On 9/4/2013 4:25 PM, Michael wrote:
>> I'm almost fifty one years old and I'm now convinced that we will not
>> see another HEO in orbit in my lifetime...if ever. The economic
>> environment to do it just doesn't exist anymore. AMSAT has as much as
>> told everyone that by abandoning their efforts and concentrating on
>> LEO cubesats. No one is going to come out and say that we absolutely
>> will never have one, they like to keep that glimmer of hope alive but
>> the writing is on the wall. No one wants to be wrong more than I do
>> but I'd bet you P3-E never flies.
>> 73,
>> Michael, W4HIJ
>>
>> On 9/3/2013 3:32 PM, John Becker wrote:
>>> Anything new on a replacement.
>>> Have not see a thing myself.
>>>
>>> John
>>>
>>>
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
>>> 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. Opinions expressed are those of the author.
>> 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. Opinions expressed are those of the author.
>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. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
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Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Thu, 5 Sep 2013 08:44:55 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] A0 40 replacement (PSK31-Best of FM and Linear!)
Message-ID: <176b74aaed28fb6d2c61ceebd2ae070b@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
> As long as AMSAT-NA needs to concentrate on... Cubesats...
> I would really like to see the pursuit of linear transponders...
> on them instead of single-channel FM repeaters.
We can have the best of BOTH FM and Linear!
> But we used to use a ucc1 in the navy to receive messages.
> http://www.virhistory.com/navy/rtty-mux-ucc1.htm
> It would allow us to receive something like 16 or 32 separate traffic
channels on one frequency.
We have that now in PSK31. Up to 30 channels in a single audio channel.
So the ideal AMSAT transponder is a linear receiver (on 28.120 MHz) and an
FM downlink of that single channel on UHF. This has the advantage of 30
individual linear uplinks to share amongst everyone, and the advantage of
FM downlink so that everyone gets the same waterfall without added
Doppler.
It's a win/win. And it is FULL duplex so that everyone can transmit
simultaneously and everyone can receive everyone simultaneously. What
more fun can that be!!!
See the design: http://aprs.org/psk31uplink2.html
And it all fits on a single 3.4" circuit board. Easy to fit in any
Cubesat. Two such flight ready boards are ready by the Brno University in
the CZECH Republic.
Bob, WB4APR
------------------------------
Message: 13
Date: Thu, 5 Sep 2013 08:17:09 -0500
From: damon runion <damonwa4hfn@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] D STAR AMsat users net
Message-ID:
<CACNBj2qFLAqvn+wUDr=DtzSnc07y9iS6E1FWFUOApMGcQ5pMtQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
D Star Amsat users net tonight at
01;00 UTC on REF 60 B
Hope to see you there with news about grid trips new operators and
things you may want to sell or buy
Satellite news ?
https://sites.google.com/site/memphisdstar/d-satellite-amsat-net
Damon
WA4HFN em55
Memphis, TN
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
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 8, Issue 297
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