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CX2SA > SATDIG 25.10.16 04:09l 1008 Lines 36721 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: HEO opertunity (David Swanson)
2. Re: HEO opertunity (Jerry Buxton)
3. Re: HEO opertunity (Zach Leffke)
4. Re: HEO opertunity (Edson W. R. Pereira)
5. Re: HEO opertunity (Zach Metzinger)
6. HEO Opportunity (David G0MRF)
7. Re: HEO opertunity (Bob- W7LRD)
8. Re: Outernet L-Band now carries AMSAT and ARISS
weeklybulletins (Scott)
9. Re: HEO opertunity (APRS?) (Robert Bruninga)
10. Re: HEO opertunity (Dave Mann)
11. Re: HEO opertunity (Greg D)
----------------------------------------------------------------------
Message: 1
Date: Mon, 24 Oct 2016 13:04:03 -0500
From: David Swanson <dave@xxxxxxxxxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] HEO opertunity
Message-ID:
<CANq+eyXnGYRh3mH4Y_FywgDqs7sDuber728b7Ttf1QRxnyAryw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I would also support and emphasize some form of transponder. I'm exactly
the kind of newer operator that Zach makes reference to that has never has
anything outside of an LEO bird to work with. While I lack anything outside
of 70cm/2m all-mode capability at the moment, if a new bird were launched
with a 23cm (or really any other band) transponder I will certainly upgrade
my station in order to work it. I'm not picky on mode or bands, just having
some form of transponder in a higher orbit is what excites me.
I'm also certainly willing to assist with training and student support
where I can. I'm somewhat tied up in my own graduate research for the next
4-5 months, but once that's complete I'll have a large academic load
removed from the shoulders.. no reason I couldn't grab another one to pick
up.
73!
Dave, KG5CCI
On Mon, Oct 24, 2016 at 10:38 AM, Paul Stoetzer <n8hm@xxxx.xxx> wrote:
> Some sort of linear transponder would be an ideal payload, even if you'd
> need a really darn good station to use it (usage of low bit rate digital
> modes through the transponder could help). The last ULA launch to GTO that
> I could find orbit details for was to 35,789 km x 3,830 km with a 19 degree
> inclination. A transponder may only be usable by the best equipped stations
> at apogee, but many more stations could use it at perigee.
>
> 73,
>
> Paul, N8HM
>
> On Mon, Oct 24, 2016 at 11:20 AM, Zach Leffke <zleffke@xx.xxx> wrote:
>
> > Given my recent interest and the previous thread on 'deep space
> > tracking,' a linear transponder on a HEO bird could offer an interesting
> > 'test bird' to conducting ranging operations and orbit determination
> with.
> > It is more 'deep space like' than the current LEO birds, but is still in
> > earth orbit and can be modeled with TLEs (so that we can check against
> > NORAD updates to see how 'good' we are doing).
> >
> > If the design is similar to what will be used on the CQC bird (or at
> least
> > an approximation that could work in a 1U), then we (as in the amateur
> > satellite community) could test out the required earth station hardware /
> > backend processing for something like this, as well as get vital training
> > for future missions such as the CQC bird and potential other HEO
> missions.
> >
> > Couple of points to back up the idea:
> >
> > 1. I'm guessing a 1U in HEO is probably tough power budget wise, so link
> > budgets will probably be tight. PN sequence ranging (in my limited
> > understanding of the subject) requires way less SNR than normal
> > communications and data transfer since your just looking for correlations
> > against the known PN sequence, so it is maybe viable given a tighter link
> > budget.
> >
> > 2. A 5GHz up/10 GHz down payload is probably not viable in a 1u (link
> > budgets, size constraints, etc). So, something like a 23cm up, 70cm down
> > bent pipe transponder would be interesting. The problem here will likely
> > be community 'backlash' in that L-band uplink stations are less common in
> > the Amateur Community. I would offer the argument of 'use it or lose it'
> > to help protect the 23cm uplink band, and also the fact that AMSAT is
> > planning an L-Band uplink for two of the 5 foxes (including 1E which will
> > be a linear transponder). So maybe having another 23cm uplink bird will
> > interest people in adding a band to their station (if two birds isn't
> > enough, maybe three is?). If L-Band up is too hard to swallow, then a 2m
> > up/70cm down bent pipe in HEO would still be interesting, compatible with
> > most Amateur ground stations, and could still be used to test ranging
> > operations.
> >
> > 3. Heavy Forward Error Correction on a separate low rate TLM downlink
> > would probably be a good idea (like AO-73, again due to probably tight
> > power budget).
> >
> > 4. training, Training, TRAINING! I know AMSAT has conducted ranging on
> > their own in the past, but its been a while. There are probably new
> > members in the community that would like to get into this sort of thing
> and
> > learn this type of skill (I include myself in that list), and the folks
> > that have done it before could help train up a younger/newer generation
> of
> > AMSAT folks, which would help protect the 'technical leadership in the
> > field of small sats' future of AMSAT.
> >
> >
> > I have no good answer for the radiation part of your question. Also, I'd
> > love to help out the students, but have my hands full here with our own
> > students at VT.
> >
> >
> > Just throwing out an idea for a payload.......
> >
> > Congrats on getting a ride!
> >
> >
> > -Zach, KJ4QLP
> >
> > Research Associate
> > Ted & Karyn Hume Center for National Security & Technology
> > Virginia Polytechnic Institute & State University
> > Work Phone: 540-231-4174
> > Cell Phone: 540-808-6305
> >
> >
> > On 10/24/2016 2:38 AM, Nick Pugh wrote:
> >
> >> Hello AMSAT-ers
> >>
> >> The University of Louisiana has a slot on a ULA mission to GTO launch
> to
> >> GTO for a 1u. WE are asking the community what payload should we fly,
> how
> >> to
> >> mitigate the radiation and who wants to help the students?
> >>
> >>
> >> http://www.ulalaunch.com/ula-announces-2016-cubesat-stem-win
> >> ners.aspx?title=
> >> United+Launch+Alliance+Announces+CubeSat+STEM+Education+Program+Winners
> >> <http://www.ulalaunch.com/ula-announces-2016-cubesat-stem-wi
> >> nners.aspx?title
> >> =United+Launch+Alliance+Announces+CubeSat+STEM+Education+
> >> Program+Winners&Cat
> >> egory=News> &Category=News
> >>
> >>
> >>
> >> 73's and see you on the baot
> >>
> >> nick k5qxj
> >>
> >>
> >> _______________________________________________
> >> 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://www.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://www.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://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 2
Date: Mon, 24 Oct 2016 13:34:15 -0500
From: Jerry Buxton <n0jy@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] HEO opertunity
Message-ID: <94ec38ce-5cb3-53f7-4804-1ff9a3212b26@xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
On 10/24/2016 10:20, Zach Leffke wrote:
> AMSAT is planning an L-Band uplink for two of the 5 foxes (including
> 1E which will be a linear transponder)
I would just like to correct this information, so that everyone is aware
and not surprised by what will be in orbit.
Fox-1Cliff and Fox-1D have the L/v band capability that Zach mentioned.
RadFxSat-2 (Fox-1E) will not.
Thanks.
Jerry Buxton, N?JY
------------------------------
Message: 3
Date: Mon, 24 Oct 2016 15:07:50 -0400
From: Zach Leffke <zleffke@xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] HEO opertunity
Message-ID: <5a987588-5aa1-1857-5a86-fe673b653f18@xx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
AHHH, sorry, i screwed that one up.
Two birds with L-band up (1Cliff and 1D), but not the one with the
linear (1E).
Somehow I can't get that straight in my head (this isn't the first time
I've mixed that up).
So many Foxes of various band/mode combos on the way! I suppose in a way
this is a good problem!
Sorry, Jerry (and everyone else). I hope I didn't cause too much
confusion there. And thank you very much for the correction.
-Zach, KJ4QLP
Research Associate
Ted & Karyn Hume Center for National Security & Technology
Virginia Polytechnic Institute & State University
Work Phone: 540-231-4174
Cell Phone: 540-808-6305
On 10/24/2016 2:34 PM, Jerry Buxton wrote:
> On 10/24/2016 10:20, Zach Leffke wrote:
>> AMSAT is planning an L-Band uplink for two of the 5 foxes (including
>> 1E which will be a linear transponder)
> I would just like to correct this information, so that everyone is aware
> and not surprised by what will be in orbit.
> Fox-1Cliff and Fox-1D have the L/v band capability that Zach mentioned.
> RadFxSat-2 (Fox-1E) will not.
>
> Thanks.
>
> Jerry Buxton, N?JY
>
>
> _______________________________________________
> 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://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Mon, 24 Oct 2016 17:23:55 -0200
From: "Edson W. R. Pereira" <ewpereira@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] HEO opertunity
Message-ID:
<CALNQy49yUVz_AWcog-WYX4wjOH5p+hKRG9esmaU35MJve+sQYQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Nick, Zach et al,
The suggestion for an L band uplink, or any uplink or downlink above 70cm
for that matter, is very welcome. We absolutely need to populate the higher
UHF and SHF bands in a way that we can justify their allocation to the
amateur radio and amateur satellite services when we amateurs sit with
regulators to defend them. Higher bands are more challenging to use, but
they do offer advantages -- wider bandwidths, higher data rates, etc.
73, Edson PY2SDR
---
- We humans have the capability to do amazing things if we work together.
- N?s seres humanos temos a capacidade de fazer coisas incr?veis se
trabalharmos juntos.
On Mon, Oct 24, 2016 at 5:07 PM, Zach Leffke <zleffke@xx.xxx> wrote:
> AHHH, sorry, i screwed that one up.
>
> Two birds with L-band up (1Cliff and 1D), but not the one with the linear
> (1E).
>
> Somehow I can't get that straight in my head (this isn't the first time
> I've mixed that up).
>
> So many Foxes of various band/mode combos on the way! I suppose in a way
> this is a good problem!
>
>
> Sorry, Jerry (and everyone else). I hope I didn't cause too much
> confusion there. And thank you very much for the correction.
>
> -Zach, KJ4QLP
>
> Research Associate
> Ted & Karyn Hume Center for National Security & Technology
> Virginia Polytechnic Institute & State University
> Work Phone: 540-231-4174
> Cell Phone: 540-808-6305
>
> On 10/24/2016 2:34 PM, Jerry Buxton wrote:
>
>> On 10/24/2016 10:20, Zach Leffke wrote:
>>
>>> AMSAT is planning an L-Band uplink for two of the 5 foxes (including
>>> 1E which will be a linear transponder)
>>>
>> I would just like to correct this information, so that everyone is aware
>> and not surprised by what will be in orbit.
>> Fox-1Cliff and Fox-1D have the L/v band capability that Zach mentioned.
>> RadFxSat-2 (Fox-1E) will not.
>>
>> Thanks.
>>
>> Jerry Buxton, N?JY
>>
>>
>> _______________________________________________
>> 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://www.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://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 5
Date: Mon, 24 Oct 2016 15:44:28 -0500
From: Zach Metzinger <zmetzing@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] HEO opertunity
Message-ID: <4281d496-d979-27d9-55b7-c157106928a0@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
On 10/24/16 14:23, Edson W. R. Pereira wrote:
> Nick, Zach et al,
>
> The suggestion for an L band uplink, or any uplink or downlink above 70cm
> for that matter, is very welcome. We absolutely need to populate the higher
> UHF and SHF bands in a way that we can justify their allocation to the
> amateur radio and amateur satellite services when we amateurs sit with
> regulators to defend them. Higher bands are more challenging to use, but
> they do offer advantages -- wider bandwidths, higher data rates, etc.
A project is underway to do just that. See this story:
http://www.arrl.org/news/amsat-seeks-volunteers-to-support-phase-4-five-and-di
me-ground-terminal-effort
--- Zach
N0ZGO
------------------------------
Message: 6
Date: Mon, 24 Oct 2016 16:53:29 -0400
From: David G0MRF <g0mrf@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] HEO Opportunity
Message-ID: <157f8783439-4c61-a6e2@xxxxxxxxxx.xxxx.xxx.xxx>
Content-Type: text/plain; charset=utf-8
Hi Nick.
FYI - I understand that Atmel has been purchased byMicrochip. ? And the
new company is offering rad hard (ish) processors forspace
I wish you luck for your 'educational discount'
Would love to help, But with ITAR, you may have to shoot me.
73
David G0MRF
Hello AMSAT-ers
The University of Louisiana has a slot on a ULA mission to GTO launch to
GTO for a 1u. WE are asking the community what payload should we fly, how to
mitigate the radiation and who wants to help the students?
------------------------------
Message: 7
Date: Mon, 24 Oct 2016 22:06:26 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
To: "Edson W. R. Pereira" <ewpereira@xxxxx.xxx>
Cc: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] HEO opertunity
Message-ID:
<282260140.26354643.1477346786125.JavaMail.zimbra@xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Is there a reason why S band is not being considered. It was good on AO-40
(sobsob). Probably because of local QRM etc.
73 Bob W7LRD
----- Original Message -----
From: "Edson W. R. Pereira" <ewpereira@xxxxx.xxx>
To: "amsat-bb" <amsat-bb@xxxxx.xxx>
Sent: Monday, October 24, 2016 12:23:55 PM
Subject: Re: [amsat-bb] HEO opertunity
Nick, Zach et al,
The suggestion for an L band uplink, or any uplink or downlink above 70cm
for that matter, is very welcome. We absolutely need to populate the higher
UHF and SHF bands in a way that we can justify their allocation to the
amateur radio and amateur satellite services when we amateurs sit with
regulators to defend them. Higher bands are more challenging to use, but
they do offer advantages -- wider bandwidths, higher data rates, etc.
73, Edson PY2SDR
---
- We humans have the capability to do amazing things if we work together.
- N?s seres humanos temos a capacidade de fazer coisas incr?veis se
trabalharmos juntos.
On Mon, Oct 24, 2016 at 5:07 PM, Zach Leffke <zleffke@xx.xxx> wrote:
> AHHH, sorry, i screwed that one up.
>
> Two birds with L-band up (1Cliff and 1D), but not the one with the linear
> (1E).
>
> Somehow I can't get that straight in my head (this isn't the first time
> I've mixed that up).
>
> So many Foxes of various band/mode combos on the way! I suppose in a way
> this is a good problem!
>
>
> Sorry, Jerry (and everyone else). I hope I didn't cause too much
> confusion there. And thank you very much for the correction.
>
> -Zach, KJ4QLP
>
> Research Associate
> Ted & Karyn Hume Center for National Security & Technology
> Virginia Polytechnic Institute & State University
> Work Phone: 540-231-4174
> Cell Phone: 540-808-6305
>
> On 10/24/2016 2:34 PM, Jerry Buxton wrote:
>
>> On 10/24/2016 10:20, Zach Leffke wrote:
>>
>>> AMSAT is planning an L-Band uplink for two of the 5 foxes (including
>>> 1E which will be a linear transponder)
>>>
>> I would just like to correct this information, so that everyone is aware
>> and not surprised by what will be in orbit.
>> Fox-1Cliff and Fox-1D have the L/v band capability that Zach mentioned.
>> RadFxSat-2 (Fox-1E) will not.
>>
>> Thanks.
>>
>> Jerry Buxton, N?JY
>>
>>
>> _______________________________________________
>> 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://www.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://www.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://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Mon, 24 Oct 2016 18:40:22 -0400
From: "Scott" <scott23192@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Outernet L-Band now carries AMSAT and ARISS
weeklybulletins
Message-ID: <0983A657B3454E73AEB6E748F2E3202F@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
So cool to see this type of info delivered via geosynchronous satellite!
===============
AMSAT NEWS SERVICE
ANS-297 http://amsat.org
----------
VHF Handheld Radio on ISS Failed, ARISS Contacts Moved to Kenwood Radio
~~~ {other articles follow} ~~~
===============
It might be useful to start the body of each file with the date of
publication. A viewer might come across this content some days after it was
originally uploaded.
Looks great!
-Scott, K4KDR
------------------------------------------------------------------------------
--
------------------------------------------------------------------------------
--
-----Original Message-----
From: Robert Bruninga
Sent: Monday, October 24, 2016 9:53 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Outernet L-Band now carries AMSAT and ARISS
weeklybulletins
The Outernet L-band feed is now carrying a condensed version of the AMSAT
and ARISS weekly news files. (Global Geosat coverage except for Northern
Alaska)...
Receivers are simple: http://aprs.org/outnet.html
For ARISS, I manually added a 2 char grid square to each school listed in
the school schedule and am asking the outernet folks to parse out that
location info and plot a 1200 km footprint on their weather globe showing
where people can tune in the ARISS contacts. Then their RTL-SDR dongle
could then actually be retuned to hear the contact. Just an idea...
Bob, WB4APR
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Dani
EA4GPZ
Sent: Saturday, October 15, 2016 7:36 AM
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] New Outernet L-Band service...
>> I hope someday a service like this will be available
>> from an AMSAT geostationary service.
> I'm pretty confident that the guys at AMSAT-DL are capable
> of doing this much better on the upcoming EsHail'2
> than what Outernet is currently doing on Inmarsat...
> They already have in mind a "DVB-S beacon"... broadcast
> from the ground station at Qatar ... carrying videos
> about Ham radio and Ham radio events on this signal.
> What is more, if you have equipment to operate EsHail'2 on SSB,
> it's more or less easy to use either the narrowband transponder
> or the wideband transponder to transmit an Outernet-type signal
> through EsHail'2, so anyone can have a go with this.
> Outernet uses 4200baud BPSK and half of the bitrate is spent for FEC.
> You can use a bit less bitrate to get a signal that will even pass
> through a conventional 2.7kHz SSB filter and you can use less
> bits for FEC to get increased data throughput (but more SNR required).
> Dani EA4GPZ
------------------------------
Message: 9
Date: Mon, 24 Oct 2016 19:25:04 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] HEO opertunity (APRS?)
Message-ID: <d3fe1d89073ef617ec4d73289228c3f5@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
> The University of Louisiana has a slot ... to GTO for a 1u.
> WE are asking the community what payload should we fly...
You could always fly an APRS digipeater. PSAT works well at LEO, but is
only 300 mW. Our next 1U APRS satellite will have a 2W transmitter and
will be quite strong horizon to horizon to an HT on the ground.
But if you raise the cubesat TX power to 4W, and use Oscar class stations
running 50w instead of 5W HT's on the ground, you can pick up 23 dB more
performance which is exactly what you need to operate to GTO at 35,000km.
The problem is the TX duty cycle. All of the APRS satellites operate with
a quite low TX duty cycle because Hams only cover about 10% of the Earth's
surface so the average transmitter power is low. On GTO, half the users
in the world can see it half the time and if they all start banging it
with chatter, then a 1U wont have the average power.
Does your GTO remain attached to a large spacecraft? Does it have more
than the average 1 Watt Solar power that a cubesat gets? If so, then the
duty cycle might not be a problem.
ON THE OTHER HAND, every APRS digipeater has a DUPE-WAIT setting that is
normally 30 seconds for mobiles to prohibit duplicating packets. You
could extend this to X miuntes to make sure no one tries to get through
more than one packet per X minutes. Or you can think of otherways to
control the user load.
Again, I am assuming 2m on 145.825 MHz. Although that is full of existing
users trying to hit the PCSAT, PSAT and ISS, no users without an OSCAR
class station and 50W will even be heard out there at GEO. SO that is a
good way to share the channel.
Unless I overlooked something, I think it could work.
It would be a great emergency response and disaster preparedness link.
For low duty cycle comms into and out of an area.
You could build the whole system includeing a 10W PA using the parts from
a Byonics Microtrak TT4. That is what we use (without the 10W PA) for our
PSAT-2 and follow-on designs.
See http://aprs.org/psat-2.html
Bob, Wb4APR
------------------------------
Message: 10
Date: Mon, 24 Oct 2016 20:25:59 -0500
From: Dave Mann <cwo4mann@xxxxxxx.xxx>
To: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Cc: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] HEO opertunity
Message-ID: <D727E6E1-3D62-42A3-BDAC-8F075CB4D569@xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
I would like to see 23cm and above seriously considered. My military
experience (30 years) demonstrated to me how easily we can communicate with
lots of bandwidth up there. My detachments did it all the time, easy peasy.
Granted that military radios are pretty much point and shoot, and easy use
for relatively untrained soldiers. Ham gear for 23cm is common in Europe,
and there is no reason we in the USA can't have that capability. I have a
23cm module for my FT-736R and a home brew helical with which I rag chew
with the other hams on 23 in the middle Tennessee area. I am not suggesting
we all mold and cast our own wave-guides, but just put some effort into the
old Ham Radio "home brew" thing. One thing about S and L and the other
microwave bands is that we have bandwidth out the wazoo.
73, Dave N4CVX
Sent from my iPad
> On Oct 24, 2016, at 17:06, Bob- W7LRD <w7lrd@xxxxxxx.xxx> wrote:
>
> Is there a reason why S band is not being considered. It was good on AO-40
(sobsob). Probably because of local QRM etc.
> 73 Bob W7LRD
>
> ----- Original Message -----
>
> From: "Edson W. R. Pereira" <ewpereira@xxxxx.xxx>
> To: "amsat-bb" <amsat-bb@xxxxx.xxx>
> Sent: Monday, October 24, 2016 12:23:55 PM
> Subject: Re: [amsat-bb] HEO opertunity
>
> Nick, Zach et al,
>
> The suggestion for an L band uplink, or any uplink or downlink above 70cm
> for that matter, is very welcome. We absolutely need to populate the higher
> UHF and SHF bands in a way that we can justify their allocation to the
> amateur radio and amateur satellite services when we amateurs sit with
> regulators to defend them. Higher bands are more challenging to use, but
> they do offer advantages -- wider bandwidths, higher data rates, etc.
>
> 73, Edson PY2SDR
>
> ---
> - We humans have the capability to do amazing things if we work together.
> - N?s seres humanos temos a capacidade de fazer coisas incr?veis se
> trabalharmos juntos.
>
>> On Mon, Oct 24, 2016 at 5:07 PM, Zach Leffke <zleffke@xx.xxx> wrote:
>>
>> AHHH, sorry, i screwed that one up.
>>
>> Two birds with L-band up (1Cliff and 1D), but not the one with the linear
>> (1E).
>>
>> Somehow I can't get that straight in my head (this isn't the first time
>> I've mixed that up).
>>
>> So many Foxes of various band/mode combos on the way! I suppose in a way
>> this is a good problem!
>>
>>
>> Sorry, Jerry (and everyone else). I hope I didn't cause too much
>> confusion there. And thank you very much for the correction.
>>
>> -Zach, KJ4QLP
>>
>> Research Associate
>> Ted & Karyn Hume Center for National Security & Technology
>> Virginia Polytechnic Institute & State University
>> Work Phone: 540-231-4174
>> Cell Phone: 540-808-6305
>>
>>> On 10/24/2016 2:34 PM, Jerry Buxton wrote:
>>>
>>>> On 10/24/2016 10:20, Zach Leffke wrote:
>>>>
>>>> AMSAT is planning an L-Band uplink for two of the 5 foxes (including
>>>> 1E which will be a linear transponder)
>>>>
>>> I would just like to correct this information, so that everyone is aware
>>> and not surprised by what will be in orbit.
>>> Fox-1Cliff and Fox-1D have the L/v band capability that Zach mentioned.
>>> RadFxSat-2 (Fox-1E) will not.
>>>
>>> Thanks.
>>>
>>> Jerry Buxton, N?JY
>>>
>>>
>>> _______________________________________________
>>> 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://www.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://www.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://www.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://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 11
Date: Mon, 24 Oct 2016 18:59:06 -0700
From: Greg D <ko6th.greg@xxxxx.xxx>
To: Dave Mann <cwo4mann@xxxxxxx.xxx>
Cc: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] HEO opertunity
Message-ID: <580EBC6A.1020703@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Agreed, but thinking back to AO-51, weren't there some geographic
limitations to the use of 23cm as an uplink? Have things changed since
then?
I'd love to get some use from my 23cm setup on the birds again, and the
AO-40 downlink is sitting in the attic, totally unused.
Greg KO6TH
Dave Mann wrote:
> I would like to see 23cm and above seriously considered. My military
experience (30 years) demonstrated to me how easily we can communicate with
lots of bandwidth up there. My detachments did it all the time, easy peasy.
Granted that military radios are pretty much point and shoot, and easy use
for relatively untrained soldiers. Ham gear for 23cm is common in Europe,
and there is no reason we in the USA can't have that capability. I have a
23cm module for my FT-736R and a home brew helical with which I rag chew
with the other hams on 23 in the middle Tennessee area. I am not suggesting
we all mold and cast our own wave-guides, but just put some effort into the
old Ham Radio "home brew" thing. One thing about S and L and the other
microwave bands is that we have bandwidth out the wazoo.
>
> 73, Dave N4CVX
>
>
> Sent from my iPad
>
>> On Oct 24, 2016, at 17:06, Bob- W7LRD <w7lrd@xxxxxxx.xxx> wrote:
>>
>> Is there a reason why S band is not being considered. It was good on
AO-40 (sobsob). Probably because of local QRM etc.
>> 73 Bob W7LRD
>>
>> ----- Original Message -----
>>
>> From: "Edson W. R. Pereira" <ewpereira@xxxxx.xxx>
>> To: "amsat-bb" <amsat-bb@xxxxx.xxx>
>> Sent: Monday, October 24, 2016 12:23:55 PM
>> Subject: Re: [amsat-bb] HEO opertunity
>>
>> Nick, Zach et al,
>>
>> The suggestion for an L band uplink, or any uplink or downlink above 70cm
>> for that matter, is very welcome. We absolutely need to populate the higher
>> UHF and SHF bands in a way that we can justify their allocation to the
>> amateur radio and amateur satellite services when we amateurs sit with
>> regulators to defend them. Higher bands are more challenging to use, but
>> they do offer advantages -- wider bandwidths, higher data rates, etc.
>>
>> 73, Edson PY2SDR
>>
>> ---
>> - We humans have the capability to do amazing things if we work together.
>> - N?s seres humanos temos a capacidade de fazer coisas incr?veis se
>> trabalharmos juntos.
>>
>>> On Mon, Oct 24, 2016 at 5:07 PM, Zach Leffke <zleffke@xx.xxx> wrote:
>>>
>>> AHHH, sorry, i screwed that one up.
>>>
>>> Two birds with L-band up (1Cliff and 1D), but not the one with the linear
>>> (1E).
>>>
>>> Somehow I can't get that straight in my head (this isn't the first time
>>> I've mixed that up).
>>>
>>> So many Foxes of various band/mode combos on the way! I suppose in a way
>>> this is a good problem!
>>>
>>>
>>> Sorry, Jerry (and everyone else). I hope I didn't cause too much
>>> confusion there. And thank you very much for the correction.
>>>
>>> -Zach, KJ4QLP
>>>
>>> Research Associate
>>> Ted & Karyn Hume Center for National Security & Technology
>>> Virginia Polytechnic Institute & State University
>>> Work Phone: 540-231-4174
>>> Cell Phone: 540-808-6305
>>>
>>>> On 10/24/2016 2:34 PM, Jerry Buxton wrote:
>>>>
>>>>> On 10/24/2016 10:20, Zach Leffke wrote:
>>>>>
>>>>> AMSAT is planning an L-Band uplink for two of the 5 foxes (including
>>>>> 1E which will be a linear transponder)
>>>>>
>>>> I would just like to correct this information, so that everyone is aware
>>>> and not surprised by what will be in orbit.
>>>> Fox-1Cliff and Fox-1D have the L/v band capability that Zach mentioned.
>>>> RadFxSat-2 (Fox-1E) will not.
>>>>
>>>> Thanks.
>>>>
>>>> Jerry Buxton, N?JY
>>>>
>>>>
>>>> _______________________________________________
>>>> 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://www.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://www.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://www.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://www.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://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Subject: Digest Footer
_______________________________________________
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://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 11, Issue 347
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