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CX2SA > SATDIG 11.03.14 14:42l 839 Lines 28047 Bytes #999 (0) @ WW
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Sent: 140311/1337Z @:CX2SA.SAL.URY.SA #:4209 [Salto] FBB7.00e $:AMSATBB986
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Talk to Luca! (Clint Bradford)
2. K&R Yoksh (K&R Yoksh)
3. Re: K&R Yoksh (Bryce Salmi)
4. [CAUTION] The Satellite ID of CelesTrack is wrong!
(Akihiro Kubota)
5. Fwd: [PVRC] W1AW/4 Virginia Ops Needed! (Paul Stoetzer)
6. WTB Icom AG-35 preamp (Bob Mattaliano)
7. W1AW/7 from Arizona, starting Wednesday 0000 UTC
(Patrick STODDARD (WD9EWK/VA7EWK))
8. AMSAT @ Scottsdale AZ Springfest hamfest on 15 March
(Patrick STODDARD (WD9EWK/VA7EWK))
9. Soyuz Lands Safely (Clint Bradford)
10. Re: Two hundred 437 MHz satallites launch March 16 + WebSDR
(Andrew Flowers)
11. Re: Two hundred 437 MHz satallites launch March 16 + WebSDR
(M5AKA)
----------------------------------------------------------------------
Message: 1
Date: Mon, 10 Mar 2014 12:20:16 -0700
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Talk to Luca!
Message-ID: <BFFD7C0C-CE8A-40CC-B14F-C51203F4845E@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
Did you follow ESA astronaut Luca Parmitano?s updates and images during his
Volare space mission on social media? Now there?s a chance to hear about his
time on the International Space Station directly from Luca.
ESA is inviting 50 followers of @xxxxxxxxxx to join us for a SocialSpace
event, open to all his followers on social networks, such as Twitter,
Facebook and Google+.
The event will take place on 11 April at ESA?s ESRIN facility in Frascati,
Italy, starting at 16:00 CEST (in English).
Complete the application at ...
http://www.esa.int/Our_Activities/Human_Spaceflight/Volare/Meet_astronaut_Luca
_Parmitano
... and good luck on being chosen!
Clint K6LCS
http://www.hamradioprogramming.com
------------------------------
Message: 2
Date: Sun, 10 Mar 2014 09:57:30 +0100
From: "K&R Yoksh" <yokshs@xxxxxxxxx.xxx>
To: "hwyman1968" <hwyman1968@xxxxx.xxx>, "radio" <radio@xxxxxx.xxx>,
"peter" <peter@xxxxx.xxx>, "k0bsj" <k0bsj@xxxxxxxxxxx.xxx>, "rel3005"
<rel3005@xxxxx.xxx>, "boprie" <boprie@xxx.xxx>, "amsat bb"
<amsat-bb@xxxxx.xxx>, "ve2ckn" <ve2ckn@xxxxxxx.xxx>, "ka2ctn78"
<ka2ctn78@xxx.xxx>
Subject: [amsat-bb] K&R Yoksh
Message-ID: <20140310205748.980065A00002@xxxx.xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
http://thelanguageconsultants.com/jcg/fox-news.php
K&R Yoksh
------------------------------
Message: 3
Date: Mon, 10 Mar 2014 14:50:16 -0700
From: Bryce Salmi <bstguitarist@xxxxx.xxx>
To: Amsat BB <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Re: K&R Yoksh
Message-ID:
<CAN5j0sq_oK0LY=Ww41fc-Z=wexx=vvtQkcojrEVqVsQz7Pz5GA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Be careful, this was flagged on my network as a security risk website.
On Mon, Mar 10, 2014 at 1:57 AM, K&R Yoksh <yokshs@xxxxxxxxx.xxx> wrote:
> http://thelanguageconsultants.com/jcg/fox-news.php
> K&R Yoksh
> _______________________________________________
> 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: Tue, 11 Mar 2014 09:02:07 +0900
From: Akihiro Kubota <akihiro.kubota@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] [CAUTION] The Satellite ID of CelesTrack is wrong!
Message-ID: <D2C696FC-472C-4D01-A623-3C8E6B41DF7C@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
dear amsat-bb members,
hello. many people ask us that the CW of our new cubesat INVADER can not be
received.
this is because the satellite id of CelesTrack is wrong.
http://www.celestrak.com/NORAD/elements/tle-new.txt
the real data is INVADER = 39577U 14009F.
we already send the measurement data of doppler shift to CelesTrack.
i hope they will correct data ASAP.
http://artsat.jp/en/news/invader%E3%81%AE%E8%A1%9B%E6%98%9F%E3%82%AB%E3%82%BF%
E3%83%AD%E3%82%B0%E7%95%AA%E5%8F%B7%E3%81%AF39577u-14009f%E3%81%A7%E3%81%99%E3
%80%82/
anyway, please use the TLE of 39577U 14009F (ITF 1) in order to receive the
CW of INVADER.
thanks in advance.
all the best,
ARTSAT project leader
akihiro kubota
------------------------------
Message: 5
Date: Mon, 10 Mar 2014 22:33:21 -0400
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>, amsat-dc@xxxxx.xxx
Subject: [amsat-bb] Fwd: [PVRC] W1AW/4 Virginia Ops Needed!
Message-ID:
<CABzOSOppdGMGMT4Wy6r9Yssr-BKZh2k5rhgeHOYprS77ht_0Yg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Looks like K4ZW is looking for a satellite operator or two or more for
W1AW/4 in Virginia.
Worst case, I'll cross the Potomac and operate a few passes, but I
know there are plenty of you out there!
73,
Paul Stoetzer, N8HM
Washington, DC
---------- Forwarded message ----------
From: Ken Claerbout <k4zw@xxxxxxx.xxx>
Date: Mon, Mar 10, 2014 at 9:25 PM
Subject: [PVRC] W1AW/4 Virginia Ops Needed!
To: pvrc@xxxxxxx.xxx.xxx
Hi Gang - just a little less than a month before the ARRL Centennial
QSO Party comes to the Commonwealth in the form of W1AW/4. We still
have plenty of operating slots available. Given all of the top notch
PVRC operators and contest stations in Virginia, we should have little
problem putting on a big time effort. Please take a few minutes to go
to http://www.nr4m.com/ARRL-Centennial-QSO-Party and check out the
information we have posted. At the bottom of the page is a
spreadsheet with the schedule, showing available slots.
This is a unique opportunity. Others that have gone before us have
reported high levels of activity with some big QSO totals for their
week. I'm hoping we can tap this groups competitive spirit and push
the bar even higher. Let's give our neighbors something to shoot for!
I know it might be difficult to plan in advance but we need to start
nailing things down. So if you can commit, please do so. If your
plans change, we'll work with you.
73
Ken K4ZW
______________________________________________________________
PVRC mailing list
Home: http://mailman.qth.net/mailman/listinfo/pvrc
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:PVRC@xxxxxxx.xxx.xxx
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Please help support this email list: http://www.qsl.net/donate.html
------------------------------
Message: 6
Date: Mon, 10 Mar 2014 22:13:21 -0400
From: "Bob Mattaliano" <n6rfm1@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] WTB Icom AG-35 preamp
Message-ID: <000201cf3ccf$7a1f1d30$6e5d5790$@xxxxxxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
If anyone has an Icom AG-35 preamp in good shape they are willing to sell,
please contact me.
TKS es 73,
Bob
------------------------------
Message: 7
Date: Mon, 10 Mar 2014 20:58:39 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] W1AW/7 from Arizona, starting Wednesday 0000 UTC
Message-ID:
<1394510319.20227.YahooMailBasic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
Starting tomorrow (Wednesday 0000 UTC, or 8pm Eastern time
Tuesday evening), W1AW/7 will be on the air from Arizona. If
you want to work this call on the HF bands and in different modes
on those bands, there is a nice schedule posted at:
http://www.n7cw.com/Schedule.html
Satellite activity is not listed on that page, as I am managing
the satellite activity on behalf of the coordinators of the Arizona
W1AW/7 activity (Ned AA7A and Bud N7CW). John K8YSE,
operating his K8YSE/7 station from DM43 in the Phoenix area,
and I will be on the satellites as W1AW/7 during the upcoming
week. Please give us a call, and get in the log. As with the other
W1AW/x activity, ARRL will be handling the QSLing as listed on
their web site, and QSOs will also be uploaded to LOTW.
Among other times, I will use W1AW/7 for demonstrations at the
Scottsdale Amateur Radio Club's Springfest hamfest on Saturday (15
March) morning instead of my own call. I will try to get on the birds
in the weeknights, and at other times on the weekend in addition to
the hamfest. K8YSE will be on other passes as W1AW/7 using his
Arizona station, based on his availability. If there are other satellite
operators who can operate from Arizona and want to help with this
state's W1AW/7 effort on the satellites, please contact me directly.
Thanks, and 73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 8
Date: Mon, 10 Mar 2014 21:13:38 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] AMSAT @ Scottsdale AZ Springfest hamfest on 15
March
Message-ID:
<1394511218.70492.YahooMailBasic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
I will have an AMSAT table at the Scottsdale Amateur Radio Club's
annual Springfest hamfest on Saturday, 15 March 2014. The hamfest
will be at the Mountain Valley Church, on Perimeter Drive north of
Princess Drive and west of the AZ-101 freeway in Scottsdale. This
was the location of the hamfest in 2012. A map of the location is
available at:
http://scottsdalearc.org/springfest-our-version-of-a-swap/springfest-2014/spri
ngfest-2014-map/
The hamfest is scheduled to run from 0600 (1300 UTC) to 1200 (1900
UTC). More information about the hamfest is available at:
http://scottsdalearc.org/springfest-our-version-of-a-swap/
http://scottsdalearc.org/springfest-our-version-of-a-swap/springfest-2014/2014
_springfest-flyer/
During the hamfest, I will have some on-air demonstrations working
different satellites. For this hamfest, I will not work the passes as
WD9EWK, but as W1AW/7 as part of the ARRL centennial
commemoration. These QSOs will be uploaded to LOTW by ARRL,
and ARRL will handle the QSLing. I will also copy telemetry from
AO-73 (FUNcube-1) and upload it in real time to the FUNcube data
warehouse server, using my FUNcube Dongle Pro+ and Elk 2m/70cm
log periodic as that satellite passes overhead.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 9
Date: Mon, 10 Mar 2014 21:42:37 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Soyuz Lands Safely
Message-ID: <65394747-3101-46F8-A1F8-F49BA80AF852@xxx.xxx>
Content-Type: text/plain; charset=us-ascii
March 10, 2014
NASA RELEASE 14-072
Space Station Crew Returns to Earth, Lands Safely in Kazakhstan
Three crew members from the International Space Station returned to Earth
Monday after 166 days in space, during which they made 2,656 orbits around
the planet and traveled almost 70.5 million miles
Expedition 38 crew members Michael Hopkins of NASA, and Oleg Kotov and
Sergey Ryazanskiy of the Russian Federal Space Agency (Roscosmos) touched
down southeast of the remote town of Dzhezkazgan, Kazakhstan, at about 11:24
p.m. EDT (9:24 a.m., March 11, in Dzhezkazgan).
/end/
------------------------------
Message: 10
Date: Tue, 11 Mar 2014 08:25:33 -0400
From: Andrew Flowers <aflowers@xxxxxxxxxxx.xxx>
To: Howie DeFelice <howied231@xxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>, Wouter Weggelaar
<wouterweg@xxxxx.xxx>
Subject: [amsat-bb] Re: Two hundred 437 MHz satallites launch March 16
+ WebSDR
Message-ID: <9D867C1F-0607-498B-B59B-72B269CD63A7@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Good Morning, Howie;
I don't believe there has been any limitation (in the US, anyway) on SS
emission types on 70cm and above since at least the late 1990's. I was
hoping someone else would chime in since surely someone in this group knows
more about that than I, but I'm pretty sure you can use whatever DS
technique you want provided that whatever other direction in part 97 is
followed. It seems things are pretty liberal to my reading, but I haven't
had occasion to play in that space.
It's my understanding that RM-11708--the current petition you
mentioned--deals only with HF and has nothing to do symbol rates or anything
else that would affect 70cm. That said, I do think it has everything to do
with Wouter's concern about openness. It makes little difference to my
daughter and me if the transmissions in amateur bands--satellite or
otherwise--are operating under part 97, part 5, or part 15 if they are by
design unintelligible to all but a select few. But that is only my picture
of things. An "HF only" petition may be relevant to this group in the sense
that this group has in the past put quite a bit of thought into this
particular subject. The satellite community may have interesting
perspective on some of this from its own experiences. If this subject is
important to you the ARRL is asking for your thoughts right now:
http://www.arrl.org/news/arrl-board-requests-member-comments-about-digital-mod
es
Enough of that digression....one other thing that *may* be an issue to the
satellite community is that the current SS rules might have some limitations
in regard to international communications, but that too may be history. How
that fits in with the *amateur satellite service* is not something I can
answer, but if it is an impediment to a worthy project it would certainly
have my support to change of needed, for whatever that is worth.
Andy K0SM/2
> On Mar 10, 2014, at 12:51 PM, Howie DeFelice <howied231@xxxxxxx.xxx> wrote:
>
> Hi Wouter,
>
> I personally agree with the ITU recommendations and think that CDMA/
spread spectrum techniques can be useful for amateur satellite
communications. Unfortunately individual national regulatory entities
(especially the U.S. FCC) can take a very long time to adopt ITU
recommendations. Current FCC rules define three spreading sequences based
on defined tapped linear sequence generators; one 7 bit, one 13 bit and one
19 bit. That makes it difficult to deploy an effective CDMA system. I am
sure provisions could be made for a STA ( special temporary authority) but I
would anticipate this to be an involved process.
>
> I believe the current efforts by the ARRL to give amateurs more
flexibility by adopting maximum bandwidth restrictions vs maximum symbol
rate restrictions is a move in the right direction. If the purpose of
amateur radio is to advance the state of the art, the rules need to be
flexible enough to accommodate innovation.
>
> Of course, these are just the opinions of one person. I am sure there are
as many opinions as there are subscribers to this list :) And yes, politics
can be a great attenuator to progress...
>
> Howie, AB2S
>
> Date: Sun, 9 Mar 2014 11:48:40 +0100
> Subject: Re: [amsat-bb] Re: Two hundred 437 MHz satallites launch March 16
+ WebSDR
> From: wouterweg@xxxxx.xxx
> To: howied231@xxxxxxx.xxx
> CC: damonwa4hfn@xxxxx.xxxx amsat-bb@xxxxx.xxx
>
> Howie,
>
> CDMA is actually actively promoted by the ITU. Indeed all the details have
to be published before launch, so everyone can demodulate it.
>
> Citing from the ITU satellite-amateur
> handbook:
> "Amateur
> and amateur-satellite systems should have technical characteristics
> that provide worldwide interoperability, and allow origination, relay
> and termination of communications independent of other radio
> services. Design emphasis should be placed on reliability, robustness
> and flexibility of reconfiguration for efficient emergency
> communications. Multiple access techniques (FDMA, TDMA and CDMA)
> should be selected for optimum spectrum efficiency and frequency
> reuse. The selection of modulation techniques should take into
> account resistance to interference and immunity to adverse
> propagation conditions."
>
>
> I have been researching this for the QB50 mission, but strong pressures
(mainly from the US) within the project killed the idea early on.
>
> The US is now actively putting satellites in 70cm with experimental
licenses, which unfortunately means they could use CDMA without providing
the spreading codes. The (majority of the) rest of the world is still using
the amateur satellite service.
>
>
> Using CDMA would be beneficial for sharing the spectrum, but required
coordination as well. I was trying to standardize the parameters (for QB50),
so the IARU could be handing out orthogonal codes to satellite teams, so
avoid clashes. But welcome to politics.....
>
>
> Wouter PA3WEG
>
>
> On Tue, Mar 4, 2014 at 10:16 PM, Howie DeFelice <howied231@xxxxxxx.xxx>
wrote:
>
> Yes, that is true, so are these licensed under an authority other than
amateur radio ? If they aren't then my questions stand.
>
>
>
>
> Date: Tue, 4 Mar 2014 14:55:52 -0600
>
> Subject: Re: [amsat-bb] Re: Two hundred 437 MHz satallites launch March 16
+ WebSDR
>
> From: damonwa4hfn@xxxxx.xxx
>
> To: howied231@xxxxxxx.xxx
>
> CC: amsat-bb@xxxxx.xxx
>
>
>
> 70 CM is not just for the ham bands, it is a shared band check the
ruleswa4hfn Damon
>
>
>
> On Tue, Mar 4, 2014 at 2:30 PM, Howie DeFelice <howied231@xxxxxxx.xxx>
wrote:
>
>
>
> Is CDMA an authorized emission type for the Amateur service? What is the
chipping rate/bandwidth of these? Don't the PRN sequences need to be made
public so as not to be classified as "encryption" ? Detailed specs on the
Sprites is in short supply. Has anyone done a link budget, seems like allot
of spreading gain is required to hear 10mW form a 300km orbit which
translates into allot of bandwidth in a part of the band usually reserved
for narrow band modes. The lack of transparency on many of these projects
that use the amateur bands seems to run against the spirit of amateur radio
in my opinion.
>
>
>
>
>
>
>
>
>
>
> Howie
>
>
>
> AB2S
>
>
>
> _______________________________________________
>
>
>
> 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: 11
Date: Tue, 11 Mar 2014 13:34:27 +0000 (GMT)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: Andrew Flowers <aflowers@xxxxxxxxxxx.xxx>, Howie DeFelice
<howied231@xxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>, Wouter Weggelaar
<wouterweg@xxxxx.xxx>
Subject: [amsat-bb] Re: Two hundred 437 MHz satallites launch March 16
+ WebSDR
Message-ID:
<1394544867.71704.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
> It's my understanding that RM-11708--the current petition you
mentioned--deals only with HF
> and has nothing to do symbol rates or
anything else that would affect 70cm.
?
Andrew,
?
As I read it RM-11708 directly affects the amateur satellite service at 144
and 435 MHz.
RM-11708 can be read at?http://apps.fcc.gov/ecfs/comment/view?id=6017477458
?
It proposes to "delete all references to symbol rate from Section 97.307(f)"
http://www.ecfr.gov/cgi-bin/retrieveECFR?gp&n=47y5.0.1.1.6&r=PART#47:5.0.1.1.6
.4.159.4
?
That would also remove the 1200 Baud restriction on 144 and the 19600 Baud
limit on 435 MHz.
?
I noted a reference to "SS" in a previous email. Some people use SS as a
convenient abbreviation for Spread Spectrum but the FCC uses it differently.
The FCC define the two letters "SS" as a separate term not an abbreviation,
see Definitions?97.3(c)(8)
http://www.gpo.gov/fdsys/pkg/CFR-2011-title47-vol5/xml/CFR-2011-title47-vol5-s
ec97-3.xml
?
On Tuesday, 11 March 2014, 12:35, Andrew Flowers <aflowers@xxxxxxxxxxx.xxx>
wrote:
Good Morning, Howie;
I don't believe there has been
any limitation (in the US, anyway) on SS emission types on 70cm and above
since at least the late 1990's.? I was hoping someone else would chime in
since surely someone in this group knows more about that than I,? but I'm
pretty sure you can use whatever DS technique you want provided that
whatever other direction in part 97 is followed.? It seems things are pretty
liberal to my reading, but I haven't had occasion to play in that space.
It's my understanding that RM-11708--the current petition you
mentioned--deals only with HF and has nothing to do symbol rates or anything
else that would affect 70cm.? That said, I do think it has everything to do
with Wouter's concern about openness.? It makes little difference to my
daughter and me if the transmissions in amateur bands--satellite or
otherwise--are operating under part 97, part 5, or part 15 if they are by
design unintelligible to all but a
select few.? But that is only my picture of things.? An "HF only" petition
may be relevant to this group in the sense that this group has in the past
put quite a bit of thought into this particular subject.? The satellite
community may have interesting perspective on some of this from its own
experiences.? If this subject is important to you the ARRL is asking for
your thoughts right now:
http://www.arrl.org/news/arrl-board-requests-member-comments-about-digital-mod
es
Enough of that digression....one other thing that *may* be an issue to the
satellite community is that the current SS rules might have some limitations
in regard to international communications, but that too may be history.? How
that fits in with the *amateur satellite service*
is not something I can answer, but if it is an impediment to a worthy
project it would certainly have my support to change of needed, for whatever
that is worth.
Andy K0SM/2
> On Mar 10, 2014, at 12:51 PM, Howie DeFelice <howied231@xxxxxxx.xxx> wrote:
>
> Hi Wouter,
>
> I personally agree with the ITU recommendations and think that CDMA/
spread spectrum techniques can be useful for amateur satellite
communications. Unfortunately individual national regulatory entities
(especially the U.S. FCC) can take a very long time to adopt ITU
recommendations.? Current FCC rules define three spreading sequences based
on defined tapped linear sequence generators; one 7 bit, one 13 bit and one
19 bit. That makes it
difficult to deploy an effective CDMA system. I am sure provisions could be
made for a STA ( special temporary authority) but I would anticipate this to
be an involved process.
>
> I believe the current efforts by the ARRL to give amateurs more
flexibility by adopting maximum bandwidth restrictions vs maximum symbol
rate restrictions is a move in the right direction. If the purpose of
amateur radio is to advance the state of the art, the rules need to be
flexible enough to accommodate innovation.
>
> Of course, these are just the opinions of one person. I am sure there are
as many opinions as there are subscribers to this list :) And yes, politics
can be a great attenuator to progress...
>
> Howie, AB2S
>
> Date: Sun, 9 Mar 2014 11:48:40 +0100
> Subject: Re: [amsat-bb] Re: Two
hundred 437 MHz satallites launch March 16 + WebSDR
> From: wouterweg@xxxxx.xxx
> To: howied231@xxxxxxx.xxx
> CC: damonwa4hfn@xxxxx.xxxx amsat-bb@xxxxx.xxx
>
> Howie,
>
> CDMA is actually actively promoted by the ITU. Indeed all the details have
to be published before launch, so everyone can demodulate it.
>
> Citing from the ITU satellite-amateur
> handbook:
> "Amateur
> and amateur-satellite systems should have technical characteristics
> that provide worldwide interoperability, and allow origination, relay
> and termination of communications independent of other radio
> services. Design emphasis should be placed on reliability, robustness
> and flexibility of reconfiguration for efficient emergency
> communications. Multiple access techniques (FDMA, TDMA and CDMA)
> should be selected for optimum spectrum efficiency and frequency
> reuse. The selection of modulation techniques should take into
> account resistance to interference and immunity to adverse
> propagation conditions."
>
>
> I have been researching this for the QB50 mission, but strong pressures
(mainly from the
US) within the project killed the idea early on.
>
> The US is now actively putting satellites in 70cm with experimental
licenses, which unfortunately means they could use CDMA without providing
the spreading codes. The (majority of the) rest of the world is still using
the amateur satellite service.
>
>
> Using CDMA would be beneficial for sharing the spectrum, but required
coordination as well. I was trying to standardize the parameters (for QB50),
so the IARU could be handing out orthogonal codes to satellite teams, so
avoid clashes. But welcome to politics.....
>
>
> Wouter PA3WEG
>
>
> On Tue, Mar 4, 2014 at 10:16 PM, Howie DeFelice <howied231@xxxxxxx.xxx>
wrote:
>
> Yes, that is true, so are these licensed under an authority other than
amateur radio ? If they aren't then my questions stand.
>
>
>
>
> Date: Tue, 4 Mar 2014 14:55:52 -0600
>
> Subject: Re: [amsat-bb] Re: Two hundred 437 MHz satallites launch March 16
+ WebSDR
>
> From: damonwa4hfn@xxxxx.xxx
>
> To: howied231@xxxxxxx.xxx
>
> CC: amsat-bb@xxxxx.xxx
>
>
>
> 70 CM is not just for the ham bands, it is a shared band check the
ruleswa4hfn Damon
>
>
>
> On Tue, Mar 4, 2014 at 2:30 PM, Howie DeFelice <howied231@xxxxxxx.xxx>
wrote:
>
>
>
> Is CDMA an authorized emission type for the Amateur service? What is the
chipping rate/bandwidth of these? Don't the PRN sequences need to be made
public so as not to be classified as "encryption" ? Detailed specs on the
Sprites is in short supply. Has anyone done a link budget, seems like allot
of spreading gain is required to hear 10mW form a 300km orbit which
translates into allot
of bandwidth in a part of the band usually reserved for narrow band modes.
The lack of transparency on many of these projects that use the amateur
bands seems to run against the spirit of amateur radio in my opinion.
>
>
>
>
>
>
>
>
>
>
> Howie
>
>
>
> AB2S
>
>
>
> _______________________________________________
>
>
>
> 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
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>
> 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
An SS emission is defined as a limited?subset of Spread Spectrum
emissions. Only emissions which have an X in?both?symbols 2 and 3 of the ITU
Emissions Designator are classified as SS. The use of those "X" symbol SS
emissions is restricted in the USA to frequencies above 420 MHz
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 9, Issue 86
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