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CX2SA > SATDIG 28.09.12 21:04l 508 Lines 16171 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V7 323
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Sent: 120928/1902Z @:CX2SA.SAL.URY.SA #:2255 [Salto] FBB7.00e $:AMSATBB7323
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: satellite spectrum (Trevor .)
2. HV Satcom Group Net Tonight Sept 27 @ 8 PM (cotejaune2@xxx.xxxx
3. BorIP - FUNcube - Ezcap - Pleasant Surprise (Thomas Doyle)
4. Re: satellite spectrum (g0mrf@xxx.xxxx
5. UT1FG/MM (Glenn AA5PK)
6. AO-27 (Allen F. Mattis)
7. Re: AO-27 (George Henry)
8. Re: Propulsion on Phase-3 Satellites.. (i8cvs)
9. Satellite Operation from the USS IOWA (Jim Jerzycke)
10. Re: satellite spectrum (Trevor .)
----------------------------------------------------------------------
Message: 1
Date: Thu, 27 Sep 2012 21:33:09 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: satellite spectrum
Message-ID:
<1348777989.41782.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Also see US Study Group 7
https://www.ussg7.org/ITAC-R%20Documents.aspx
Specifically document 7B017R4
Working document toward a Preliminary Draft New Report on the definitions,
characteristics and spectrum requirements of nano- and picosatellites as
well as systems composed of such satellites
https://www.ussg7.org/members/Approved%20Documents/US7B017R4.docx
On a different topic 7C006R3 (1215-1300 MHz) may be of interest.
73 Trevor M5AKA
--- On Thu, 27/9/12, Trevor . <m5aka@xxxxx.xx.xx> wrote:
> There's also a text version of the article at
>
>
http://www.satellitetoday.com/via/globalreg/Nano-and-Pico-Satellites_39485.htm
l
>
> Also see
>
http://www.satellitetoday.com/via/globalreg/ITU-Satellite-Work-Between-the-Rad
io-Conferences_38770.html
>
> What struck me as odd from the paper circulated at WRC 2012
> was the concept of creating a new ITU Radio Service based on
> the size of the equipment that would house the radio
> transmitter.
>
> There is, however, no denying that the Amateur-satellite
> Service requires more spectrum. The key spectrum for us is
> at VHF/UHF below 1 GHz but we only have two allocations -
> 435-438 MHz on a secondary basis, shared with the Military,
> SAR satellites and others, and the 144 MHz band of which
> only 200 kHz, 144.8-146 MHz, is available to us.
>
> You can see that when the QB50 project deploys 50 CubeSats
> it's going to put the available spectrum under stress.
>
> Hopefully US members are periodically reminding ARRL of the
> need for additional Amateur-satellite Service spectrum
> (Earth-to-Space and Space-to-Earth) in the VHF/UHF 40-1000
> MHz region. Global allocations at 2300 and 3400 MHz are also
> needed.
>
> 73 Trevor M5AKA
> ----
------------------------------
Message: 2
Date: Thu, 27 Sep 2012 16:59:55 -0400 (EDT)
From: cotejaune2@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] HV Satcom Group Net Tonight Sept 27 @ 8 PM
Message-ID: <8CF6B0A2E2B6B72-300-41C6A@xxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
It is time again for the Husson valley Satcom Group Net tonight Sept 27
@ 8 PM on Echolink N2EYH-L and on the Mt Beacon Repeater 146.970 pl
100.Please join the net and share your satellite knowledge with us.
Hope to hear you there. 73 Gary wa2aqh. And Tom kc2dtq
------------------------------
Message: 3
Date: Thu, 27 Sep 2012 16:07:32 -0500
From: Thomas Doyle <tomdoyle1948@xxxxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Subject: [amsat-bb] BorIP - FUNcube - Ezcap - Pleasant Surprise
Message-ID:
<CAHnRQRK3GF6AdSY_tszETvA5eueeiqdhcg-zaRDZj0udvZjqpw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
While trying to get my FUNcube and Ezcap dongles to work with BorIP I
ran across something that surprised me. After getting BorIP to work
with both dongles I went back and took another look at the
introductory video for BorIP. I have always assumed that that people
in general were not interested in any thing complex like satellite
communications because they were too busy tweeting, playing Angry
Birds or standing in line waiting to buy a new iPhone. Much to my
surprise I found that there were over 58,000 views of the video. That
was about 57,990 more than I expected. I believe there are a lot more
tech savvy people out there than I ever imagined which offers the
possibility of a brighter future for our hobby.
BTW - BorIP works like a champ with both the FUNcube and Ezcap
modules. Very nice system.
BorIP is no where near as difficult to set up as you might expect
after watching the video.
http://www.youtube.com/watch?v=Z0hEquzLsWU
http://wiki.spench.net/wiki/BorIP
73 W9KE Tom Doyle
------------------------------
Message: 4
Date: Thu, 27 Sep 2012 17:54:31 -0400 (EDT)
From: g0mrf@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: satellite spectrum
Message-ID: <8CF6B11CEB457C3-CD4-3378B@xxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Not sure I understand why 50 cubesats in orbit for 3 - 6 months doing
atmospheric research will 'cause stress' on bandwidth.
If you have a generous 20kHz spacing to allow for +/- 10kHz doppler,
then we have 1MHz of spectrum.
OK, there are other occupants than need to be avoided but there are
3MHz available.
Sounds like a good use for a reworked version of ' CW skimmer '
Thanks
David G0MRF
There is, however, no denying that the Amateur-satellite Service
requires more
spectrum. The key spectrum for us is at VHF/UHF below 1 GHz but we only
have two
allocations - 435-438 MHz on a secondary basis, shared with the
Military, SAR
satellites and others, and the 144 MHz band of which only 200 kHz,
144.8-146
MHz, is available to us.
You can see that when the QB50 project deploys 50 CubeSats it's going
to put the
available spectrum under stress.
-----Original Message-----
From: Trevor . <m5aka@xxxxx.xx.xx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Sent: Thu, 27 Sep 2012 18:03
Subject: [amsat-bb] Re: satellite spectrum
> You can read the article in their online version
> of the magazine at:
http://accessintelligence.imirus.com/Mpowered/book/vvs12/i10/p1
Thanks Howie,
There's also a text version of the article at
http://www.satellitetoday.com/via/globalreg/Nano-and-Pico-Satellites_39485.htm
l
What struck me as odd from the paper circulated at WRC 2012 was the
concept of
creating a new ITU Radio Service based on the size of the equipment
that would
house the radio transmitter.
There is, however, no denying that the Amateur-satellite Service
requires more
spectrum. The key spectrum for us is at VHF/UHF below 1 GHz but we only
have two
allocations - 435-438 MHz on a secondary basis, shared with the
Military, SAR
satellites and others, and the 144 MHz band of which only 200 kHz,
144.8-146
MHz, is available to us.
You can see that when the QB50 project deploys 50 CubeSats it's going
to put the
available spectrum under stress.
Hopefully US members are periodically reminding ARRL of the need for
additional
Amateur-satellite Service spectrum (Earth-to-Space and Space-to-Earth)
in the
VHF/UHF 40-1000 MHz region. Global allocations at 2300 and 3400 MHz are
also
needed.
73 Trevor M5AKA
----
_______________________________________________
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: 5
Date: Thu, 27 Sep 2012 17:33:54 -0500
From: Glenn AA5PK <aa5pk@xxxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] UT1FG/MM
Message-ID: <20120927173354.XBKU1.135136.root@xxxxxxxx>
Content-Type: text/plain; charset=utf-8
I just worked Yuri on AO-7 Mode B. He was in grid FI01.
73
Glenn AA5PK
------------------------------
Message: 6
Date: Thu, 27 Sep 2012 18:27:14 -0500
From: "Allen F. Mattis" <afmattis@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] AO-27
Message-ID: <201209272332.q8RNVxiD026662@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I did not hear AO-27 on the 2030 utc 27-Sept-2012 pass over North
America. Can anyone else confirm AO-27 is not working or did I have
an "operator error?"
Allen N5AFV
------------------------------
Message: 7
Date: Thu, 27 Sep 2012 19:24:20 -0500
From: "George Henry" <ka3hsw@xxx.xxx>
To: <amsat-bb@xxxxx.xxx>, "Allen F. Mattis" <afmattis@xxxxxx.xxx>
Subject: [amsat-bb] Re: AO-27
Message-ID: <5BCBE5EC0892425AB2A4F2A72E6D50F2@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
Were you using the AO-27 website schedule, or the Java schedule lister to
determine the "on" time? It appears that the website is off (late) by about
20 minutes again...
George, KA3HSW
----- Original Message -----
From: "Allen F. Mattis" <afmattis@xxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Thursday, September 27, 2012 6:27 PM
Subject: [amsat-bb] AO-27
>I did not hear AO-27 on the 2030 utc 27-Sept-2012 pass over North America.
>Can anyone else confirm AO-27 is not working or did I have an "operator
>error?"
>
> Allen N5AFV
>
> _______________________________________________
> 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: Fri, 28 Sep 2012 04:51:49 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Peter Guelzow" <peter.guelzow@xxxxxx.xx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Propulsion on Phase-3 Satellites..
Message-ID: <000001cd9d25$824abfa0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Peter Guelzow" <peter.guelzow@xxxxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, September 26, 2012 11:53 PM
Subject: [amsat-bb] Propulsion on Phase-3 Satellites..
> >
> > Hi,
> >
> > Since you brought up "politics"...all I know is that trying the same
> > thing over and over usually ensures getting the same results. I dont
> > think we are going to see an AO-10,13 or 40 again because of the
> > propulsion issue.
> > I doubt any group is going to let a pyalod on with a motor unless there
> > are "real rocket scientist" doing the job...the record has not been all
> > that sterling.
> >
> >
> Just for clarification:
>
> AMSAT P3-A on Ariane-1 L02 together with Firewheel.
> AMSAT P3-B / AO-10 on Ariane-1 L06 with ECS-1 first European
> Communication Satellite.
> AMSAT P3-C / AO-13 on Ariane-401 with Panamsat-1 and METEOSAT-P2.
> AMSAT P3-D / AO-40 on Ariane-507 with Panamsat PAS-1R and STRV-1C,
> STRV-1D for DERA.
>
> AMSAT was also flying explosive Bolt-cutters for the clamp-bands on
> these missions.
> For one of the earlier launchers AMSAT-DL designed and build
> Separation-Sequencers for the non-AMSAT payload/adapters as part of some
> "launch compensation".
> The SBS on P3-D was provided by AMSAT and it was carrying the heaviest
> primary payload on Ariane-5 at that time. Was this "too risky" for the
> paying primary payload?
> No, because we delivered and went through all required quality gates..
>
> The propulsion system always had to go through several Safety
> Submissions Phases in which we had to certify and demonstrate that the
> launch configuration of critical software and hardware commands is in
> conformity with the CSG safety regulations and has been tested as an
> effective inhibit to all the potential hazardous commands (means also
> propulsion).
>
> The command inhibit circuits (hardware and software) dedicated to
> hazardous systems have been tested and validated and they are working
> properly.
> A system check was successfully performed at CSG (Center Spatial
> Guyanaise) facilities before loading with fuel.
>
> There were 7 Levels of Safety Barriers (hardware and software) to
> ensure this !!!
>
> So don't even think or believe that any P3-Satellite would have ever
> been launched without them (the launch provider) knowing what we were
> doing!
>
> Neither CSG (also responsible for the safety of the people at the launch
> center), or ESA or Arianespace or any of the other Payloads and
> Customers would do that..
>
> We have been already discussing P3-E in details and there was no doubt
> about it concerning all pre- and post-launch operations, even after the
> fate of AO-40!!
> What happened to AO-40 later are two completely different shoes.. And
> even this was discussed with them in lengthy and they were not
> concerned... Shit happens..
> We were told to be still satisfied since our bird was alive for more
> than 4 years (!) compared to other commercial satellites they have been
> launching and which failed only days later for even more stupid reasons..
>
>
> So let's stop this kind of destructive assumptions making and
> conclusion making, if you don't know what you are talking about..
>
>
> *** The Launch is the problem... not the propulsion !! ***
>
> If we bring enough money, they will for sure take P3-E into orbit as
> soon as possible..
>
>
> The rough number of 10 Million Euro is indeed the commercial value,
> nothing we paid in the past or will be in the future..
> We always have to look for "compensation"...
>
>
> So, we will continue to fight for it and to find ways to launch P3-E.
>
>
> 73s Peter DB2OS
>
> There is a saying: Where there's a will, there's a way. A firm belief in
> the feasibility of a case involving the feasibility of an idea is the
> basis of all creative thought and action....
> If you don't even try and keep your goals low, you will never get beyond
> earth surface...
>
>
Hi Peter, DB2OS
Thank you very much to remember the story of Propulsion of Phase-3 AMSAT
satellite to people that absolutely don't know what they are talking about.
73" de
i8CVS Domenico
------------------------------
Message: 9
Date: Fri, 28 Sep 2012 04:39:41 +0000
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Satellite Operation from the USS IOWA
Message-ID: <50652A0D.7010409@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Greetings, all
I'll be operating for the BSA JOTA event from the USS IOWA in San Pedro
on 20 October from 1600 UTC to 2300 UTC.
We'll be using the callsign NI6BB.
Pass predictions indicate we can use FO-29, AO-27, and AO-7.
I'll concentrate mostly on the linear birds, as I "kinda sorta" don't
want to expose the Scouts to the pandemonium of an FM satellite on the
weekends.
I *will* listen, though, and if it doesn't sound too crowded, I'll try
and make some FM contacts, too.
We also have a couple of great ISS passes, but I don't know what mode
the ham station on the ISS will be in that weekend.
Hope to work some of you from the IOWA!
73, Jim KQ6EA
------------------------------
Message: 10
Date: Fri, 28 Sep 2012 08:30:34 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxxx g0mrf@xxx.xxx
Subject: [amsat-bb] Re: satellite spectrum
Message-ID:
<1348817434.70759.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
--- On Thu, 27/9/12, g0mrf@xxx.xxx <g0mrf@xxx.xxx> wrote:
> Not sure I understand why 50 cubesats
> in orbit for 3 - 6 months doing atmospheric research will
> 'cause stress' on bandwidth.
If traditional modulation techniques were used and you wished to have unique
downlink channels (minimum 50 kHz channel spacing on 435 due to Doppler) you
could end up using 2.5 MHz for the downlinks from the 50 CubeSats.
Hopefully other approaches will be used to reduce the bandwidth.
But remember this is on top of existing activity. 2013 is likely to see
30-40 CubeSats launched and it wouldn't surprise me to see even more in
2014, so by the time the QB50 deployment takes place they'll be a lot of
activity already up there.
73 Trevor M5AKA
------------------------------
_______________________________________________
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 7, Issue 323
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