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CX2SA > SATDIG 31.12.19 19:13l 1025 Lines 31605 Bytes #999 (0) @ WW
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Sent: 191231/1705Z @:CX2SA.SAL.URY.SOAM #:21843 [Salto] FBB7.00e $:AMSATBB14443
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: sstv saving pics from mmsstv (Greg D)
2. Re: When exactly is a non-conductive mast necessary? (Andy)
3. Re: When exactly is a non-conductive mast necessary? (Ev Tupis)
4. Re: When exactly is a non-conductive mast necessary?
(Zach Metzinger)
5. Re: When exactly is a non-conductive mast necessary?
(Zach Metzinger)
6. Re: When exactly is a non-conductive mast necessary? (Bill Booth)
7. Upcoming ARISS Contact Schedule as of 2019-12-31 14:30 UTC
(aj9n@???.????
8. SSTV on Linears (Roy Dean)
9. Re: SSTV on Linears (John Kludt)
----------------------------------------------------------------------
Message: 1
Date: Mon, 30 Dec 2019 20:12:19 -0800
From: Greg D <ko6th.greg@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] sstv saving pics from mmsstv
Message-ID: <cc981f51-72fb-af36-d3a2-2cc7b0761d27@?????.???>
Content-Type: text/plain; charset=us-ascii
I did some SSTV years ago via AO-40. Really fun. But with a LEO
satellite, you will need to be actively adjusting for Doppler shift in
real time, as SSTV is frequency sensitive. You might try some of the
faster modes, especially since a pass is over in just a few minutes.
Greg KO6TH
Andrew Glasbrenner via AMSAT-BB wrote:
> It's no worse than SSB as long as the power is kept down. Don't try it on
> AO-7 though, please. About 10 years ago it was commonly heard on transponder
> sats.
>
> 73, Drew KO4MA
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Roy Dean via
> AMSAT-BB
> Sent: Monday, December 30, 2019 8:54 PM
> To: amsat-bb@?????.???
> Subject: Re: [amsat-bb] sstv saving pics from mmsstv
>
>> Anyone want to work me on a ssb bird in sstv mode??I hear a lot of
>> open time on western US pass's brad Ko6kLSSTV Webcam View Slow Scan TV
>> shortwave bands LIVE
>
> I've been looking to do something like this, too. Interested in hearing
> the groups thoughts before proceeding, though.
>
> --Roy
> K3RLD
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 2
Date: Mon, 30 Dec 2019 23:00:14 -0600
From: "Andy" <w5acm@??????.???>
To: <amsat-bb@?????.???>
Subject: Re: [amsat-bb] When exactly is a non-conductive mast
necessary?
Message-ID: <02c301d5bf97$310118a0$930349e0$@??????.???>
Content-Type: text/plain; charset="us-ascii"
I used a copper boom for many years.
The antennas were oriented in an "X" pattern.
The vertical mast was aluminum.
Several thousand satellite contacts later, what can I say?
If it works, use it.
Have a polarization switch on 70cm. You need it.
And yes, pay attention to connectors and coax!
Andy W5ACM
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@?????.???? On Behalf Of John Kludt
via AMSAT-BB
Sent: Monday, December 30, 2019 8:21 PM
To: Cathryn Mataga <cathryn@????????????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] When exactly is a non-conductive mast necessary?
Cathryn,
And if you pay attention to all of the caveats in his paper. One saving
grace about all of this is it is not EME. If you were working with
250 +/- dB path loss and a passive reflector like the moon you might come
to a different conclusion. Just be careful of all of the those 1/2
wavelengths and 1 wavelengths that he speaks about. Especially for the 70
cm uplinks as that isn't very many inches.
The other thing I have seen folks trip over is coax selection. Satellites
are not the place to be using RG-8X. Others may have other thoughts I think
you are looking at LMR400 or its equivalent or better if it is a permanent
installation.
John
On Mon, Dec 30, 2019 at 7:57 PM Cathryn Mataga via AMSAT-BB <
amsat-bb@?????.???> wrote:
> Oh, thanks guys. This is eye-opening. It looks like even circular
> polarized antennas will work with metal masts, if you rotate them 45
> degrees.
>
>
> On 12/30/2019 2:31 PM, Gary wrote:
> > The short answer is almost never. Here is a link to an AMSAT
> > Symposium
> paper form antenna guru Kent Britain, wa5vjb (inventor of the famous
> cheap yagis). He actually measured the effects.
> > http://www.kk0sd.net/metalboom/metalboom.htm
> >
> >
> > 73,
> > Joe kk0sd
> >
> >
> > -----Original Message-----
> > From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Cathryn
> > Mataga
> via AMSAT-BB
> > Sent: Monday, December 30, 2019 3:27 PM
> > To: amsat-bb@?????.???
> > Subject: [amsat-bb] When exactly is a non-conductive mast necessary?
> >
> > I'm trying to understand, under what circumstances is a
> > non-conductive
> mast necessary at VHF/UHF frequencies. Thinking of the following installs.
> >
> > 1. Circular polarized antenna mounted to the mast at the center of
> > the
> boom. This is clear, see this advice all the time, fiberglass mast.
> >
> > 2. Same antenna but mounted at the rear end of the boom.
> >
> > 3. Vertical Yagi, elements parallel to a vertical mast, mounted at
> > the
> center of the boom. I guess, non-conductive wold be required here.
> >
> > 4. Same antenna but rear mounted.
> >
> > 5. Horizontal Yagi, elements perpendicular to a vertical mast,
> > mounted
> at the center of the boom. I think this is pretty normal install, so
> a conductive mast would be okay?
> >
> > 6. Same antenna but mounted at the rear of the boom.
> >
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. 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:
> > https://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>
_______________________________________________
Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Tue, 31 Dec 2019 11:09:17 +0000 (UTC)
From: Ev Tupis <w2ev@?????.???>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] When exactly is a non-conductive mast
necessary?
Message-ID: <1393851838.3379126.1577790557686@????.?????.???>
Content-Type: text/plain; charset=UTF-8
You've received some excellent information with that link to Kent's articles.
In regard to coax selection (not what you asked about, but some input you
received), "better is always better", but the question becomes, "How much
better?"
The answer is in the math.
If running the FM satellites from an HT and your coax is 3' from HT to
antenna, using RG8x will result in 0.3 dB of attenuation at 70cm.? Using
LMR-400 will be "better" at "only" 0.1 dB.? In the real world, the 0.2 dB
difference is indistinguishable.
My point is not to contradict John's statement.? It is to add perspective
and a pathway to allow you to decide what is best for your usage.
Cheers,Ev, W2EV
https://www.timesmicrowave.com/Calculator
On Monday, December 30, 2019, 9:26:47 PM EST, John Kludt via AMSAT-BB
<amsat-bb@?????.???> wrote:
Cathryn,
And if you pay attention to all of the caveats in his paper.? One saving
grace about all of this is it is not EME.? If you were working with
250 +/-? dB path loss and a passive reflector like the moon you might come
to a different conclusion.? Just be careful of all of the those 1/2
wavelengths and 1 wavelengths that he speaks about.? Especially for the 70
cm uplinks as that isn't very many inches.
The other thing I have seen folks trip over is coax selection.? Satellites
are not the place to be using RG-8X.? Others may have other thoughts I
think you are looking at LMR400 or its equivalent or better if it is a
permanent installation.
John
On Mon, Dec 30, 2019 at 7:57 PM Cathryn Mataga via AMSAT-BB <
amsat-bb@?????.???> wrote:
> Oh, thanks guys. This is eye-opening.? It looks like even circular
> polarized antennas will work with metal masts, if you rotate them 45
> degrees.
>
>
> On 12/30/2019 2:31 PM, Gary wrote:
> > The short answer is almost never. Here is a link to an AMSAT Symposium
> paper form antenna guru Kent Britain, wa5vjb (inventor of the famous cheap
> yagis). He actually measured the effects.
> > http://www.kk0sd.net/metalboom/metalboom.htm
> >
> >
> > 73,
> > Joe kk0sd
> >
> >
> > -----Original Message-----
> > From: AMSAT-BB <amsat-bb-bounces@?????.???> On Behalf Of Cathryn Mataga
> via AMSAT-BB
> > Sent: Monday, December 30, 2019 3:27 PM
> > To: amsat-bb@?????.???
> > Subject: [amsat-bb] When exactly is a non-conductive mast necessary?
> >
> > I'm trying to understand, under what circumstances is a non-conductive
> mast necessary at VHF/UHF frequencies. Thinking of the following installs.
> >
> > 1.? Circular polarized antenna mounted to the mast at the center of the
> boom.? ? This is clear, see this advice all the time, fiberglass mast.
> >
> > 2. Same antenna but mounted at the rear end of the boom.
> >
> > 3.? Vertical Yagi, elements parallel to a vertical mast, mounted at the
> center of the boom. I guess, non-conductive wold be required here.
> >
> > 4.? Same antenna but rear mounted.
> >
> > 5.? Horizontal Yagi, elements perpendicular to a vertical mast, mounted
> at the center of the boom.? I think this is pretty normal install, so a
> conductive mast would be okay?
> >
> > 6. Same antenna but mounted at the rear of the boom.
> >
> > _______________________________________________
> > Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>
_______________________________________________
Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Tue, 31 Dec 2019 05:54:38 -0600
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] When exactly is a non-conductive mast
necessary?
Message-ID: <25dfbc5f-3a77-2315-1fec-52674bf3b3c5@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 2019-12-30 20:20, John Kludt via AMSAT-BB wrote:
> The other thing I have seen folks trip over is coax selection. Satellites
> are not the place to be using RG-8X. Others may have other thoughts I
> think you are looking at LMR400 or its equivalent or better if it is a
> permanent installation.
I'll chime in with my usual "it depends" statement: Spending a bunch of
money on coax and neglecting a good LNA located _at the antenna_ is a
shame.
If you have a big spool of RG-8X (or even RG-8) and some few dollars for
a preamp (LNA), go for the preamp! 100' of LMR400 has a loss of 2.7dB at
70cm. Without a preamp, you now have an instant 2.7dB (or worse) noise
figure, even before you get to the radio's front-end, and you've spent
3x on coax.
Yes, RG-8X loss at 70cm is 8.1dB, which means your radio's 100W signal
is only ~15W at the antenna, but that's more than enough to reach a
satellite before antenna directional gain is accounted for.
One can always make more TX power (and today's radios are overpowered
anyway), but one can never recover signals already lost.
A prototypical LNA for 20 EUR ($22 USD) at http://lna4all.blogspot.com/,
and a determined amateur can construct one for less.
Back to building..
--- Zach
N0ZGO
------------------------------
Message: 5
Date: Tue, 31 Dec 2019 06:01:55 -0600
From: Zach Metzinger <zmetzing@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] When exactly is a non-conductive mast
necessary?
Message-ID: <af8570b4-e2b9-c61c-ee3a-44b97f47535d@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 2019-12-31 05:54, Zach Metzinger via AMSAT-BB wrote:
> A prototypical LNA for 20 EUR ($22 USD) at http://lna4all.blogspot.com/,
> and a determined amateur can construct one for less.
Following up on this a bit, PA3CSG's web page has a 70cm antenna switch
built with cheap relays you might find in consumer electronics:
https://pa3csg.nl/?page_id=1114
This design could easily be combined with the LNA4ALL design into an
inexpensive, DC-switched system capable of handling significant power.
--- Zach
N0ZGO
------------------------------
Message: 6
Date: Tue, 31 Dec 2019 08:51:19 -0500
From: Bill Booth <ve3nxk@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] When exactly is a non-conductive mast
necessary?
Message-ID: <9681fa6e-09b6-cbb7-ecea-a9bbb5481d82@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 2019-12-31 12:00 a.m., Andy via AMSAT-BB wrote:
> I used a copper boom for many years.
> The antennas were oriented in an "X" pattern.
Same here. Run coax along boom too. Been like that since ???forever.
Installed
my Crushcraft pair like that when I purchased them in 80's and still working
today.
--
Bill Booth VE3NXK
Sundridge ON, Canada
79.23.37 W x 45.46.18 N
FN05ns
Visit my weather WebCam at http://www.almaguin.com/wxcurrent/weather.html
Organ and Tissue Donation - The Gift of Life
Talk to your family. Your decision can make a difference.
------------------------------
Message: 7
Date: Tue, 31 Dec 2019 14:33:36 +0000 (UTC)
From: aj9n@???.???
To: amsat-bb@?????.???
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2019-12-31
14:30 UTC
Message-ID: <82422635.3404667.1577802816957@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Upcoming ARISS Contact Schedule as of 2019-12-31 14:30 UTC
?
Quick list of scheduled contacts and events:
?
Worldwide ARISS commemorative SSTV operation runs from Dec 28 (11:00 UTC is
the setup time) until Jan 1, 2020 (18:20 UTC when the system is scheduled
for shutdown). (***)
?
Transmissions should be on the standard frequency of 145.800 MHz and in
the PD 120 format.
?
?
?
Once again, ARISS has had an outstanding year of contacts.? We would
especially like to thank the hardworking telebridge ground stations for
their help:? IK1SLD, K6DUE, LU8YY, ON4ISS, VK4KHZ, VK5ZAI, VK6MJ, and
W6SRJ.? (***)
?
?
?
The ARISS webpage is at https://www.ariss.org/ ???
Note that there are links to other ARISS websites from this site.
?
The main page for Applying to Host a Scheduled Contact may be found at
https://www.ariss.org/apply-to-host-an-ariss-contact.html ???
ARISS Contact Applications (United States)
?
?
Note, all times are approximate. ?It is recommended that you do your own
orbital prediction?or start listening about 10 minutes before the listed
time.
All dates and times listed follow International Standard ISO 8601 date and
time format YYYY-MM-DD HH:MM:SS
?
The complete schedule page has been updated as of?2019-12-31 14:30 UTC. (***)
Here you will find a listing of all scheduled?school contacts, and
questions, other ISS related websites, IRLP and Echolink websites, and
instructions for any contact that may be streamed live.
?
https://www.amsat.org/amsat/ariss/news/arissnews.rtf
https://www.amsat.org/amsat/ariss/news/arissnews.txt
?
?
The successful school list has been updated as of 2019-12-21 03:00 UTC.
https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
?
?
?
The ARISS webpage is at https://www.ariss.org/ ???
Note that there are links to other ARISS websites from this site.
?
The main page for Applying to Host a Scheduled Contact may be found at
https://www.ariss.org/apply-to-host-an-ariss-contact.html ???
?
ARISS Contact Applications (United States)
?
The ARISS webpage is at https://www.ariss.org/ ???
Note that there are links to other ARISS websites from this site.
?
?
Message to US Educators
?
Amateur Radio on the International Space Station?
?
Contact Opportunity?
?
Call for Proposals?
?
Upcoming Proposal Window is February 1, 2020 to March 31, 2020
?
The Amateur Radio on the International Space Station (ARISS) Program is
seeking formal and informal education institutions and organizations,
individually or working together, to host an Amateur Radio contact with a
crew member on board the ISS.? ARISS is happy to announce a proposal window
will open February 1, 2020 for contacts that would be held between January
1, 2021 and June 30, 2021. Crew scheduling and ISS orbits will determine the
exact contact dates. To maximize these radio contact opportunities, ARISS is
looking for organizations that will draw large numbers of participants and
integrate the contact into a well-developed education plan.?
?
?
?
The proposal window for contacts between January 1, 2021 and June 30, 2021
will open on February 1, 2020 and close on March 31, 2020.? Proposal
information and documents can be found at www.ariss.org. Two ARISS
Introductory Webinar sessions will be held on November 7, 2019. The first is
at 6:00 PM ET and the second is at 9:00 PM ET. The same material will be
covered during both sessions, so choose the session that best fits your
schedule. The Eventbrite link to sign up
is?https://ariss-introductory-webinar-fall-2019.eventbrite.com?.
?
The Opportunity?
?
Crew members aboard the International Space Station will participate in
scheduled Amateur Radio contacts. These radio contacts are approximately 10
minutes in length and allow students to interact with the astronauts through
a question-and-answer session.?
?
An ARISS contact is a voice-only communication opportunity via Amateur Radio
between astronauts and cosmonauts aboard the space station and classrooms
and communities. ARISS contacts afford education audiences the opportunity
to learn firsthand from astronauts what it is like to live and work in space
and to learn about space research conducted on the ISS. Students also will
have an opportunity to learn about satellite communication, wireless
technology, and radio science. Because of the nature of human spaceflight
and the complexity of scheduling activities aboard the ISS, organizations
must demonstrate flexibility to accommodate changes in dates and times of
the radio contact.?
?
Amateur Radio organizations around the world with the support of NASA and
space agencies in Russia, Canada, Japan and Europe present educational
organizations with this opportunity. The ham radio organizations' volunteer
efforts provide the equipment and operational support to enable
communication between crew on the ISS and students around the world using
Amateur Radio.??
?
More Information
?
For proposal information and more details such as expectations, proposal
guidelines and proposal form, and dates and times of Information Webinars,
go to www.ariss.org.
?
Please direct any questions to?ariss.us.education@?????.???.?
?
About ARISS:
?
Amateur Radio on the International Space Station (ARISS) is a cooperative
venture of international amateur radio societies and the space agencies that
support the International Space Station (ISS).? In the United States,
sponsors are the Radio Amateur Satellite Corporation (AMSAT), the American
Radio Relay League (ARRL), the ISS National Lab and National Aeronautics and
Space Administration (NASA). The primary goal of ARISS is to promote
exploration of science, technology, engineering, and mathematics (STEAM)
topics by organizing scheduled contacts via amateur radio between crew
members aboard the ISS and students in classrooms or public forms. Before
and during these radio contacts, students, educators, parents, and
communities learn about space, space technologies, and amateur radio. For
more information, see www.ariss.org.
?
******************************************************************************
**
ARISS Contact Applications (Europe, Africa and the Middle East)
?
Schools and Youth organizations in Europe, Africa and the Middle East
interested in setting up an ARISS radio contact with an astronaut on board
the International Space Station are invited to submit an application from
September to October and from February to April.
Please refer to details and the application form at
www.ariss-eu.org/school-contacts.? Applications should be addressed by email
to:? school.selection.manager@????????.???
?
ARISS Contact Applications (Canada, Central and South America, Asia and
Australia and Russia)
?
Organizations outside the United States can apply for an ARISS contact by
filling out an application.? Please direct questions to the appropriate
regional representative listed below. If your country is not specifically
listed, send your questions to the nearest ARISS Region listed. If you are
unsure which address to use, please send your question to the ARISS-Canada
representative; they will forward your question to the appropriate
coordinator.
?
For the application, go to:? https://www.ariss.org/ariss-application.html.
ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to:
ve3tbd@?????.???
ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to:
ariss@???????.???? Japan Amateur Radio League (JARL) https://www.jarl.org/
ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/
?
?
******************************************************************************
ARISS is always glad to receive listener reports for the above contacts.?
ARISS thanks everyone in advance for their assistance.? Feel free to send
your reports to aj9n@?????.??? or aj9n@???.???.
?
Listen for the ISS on the downlink of 145.8? MHz.
?
******************************************************************************
*
?
All ARISS contacts are made via the Kenwood radio unless otherwise noted.
?
******************************************************************************
*
Several of you have sent me emails asking about the RAC ARISS website and
not being able to get in. ?That has now been changed to https://www.ariss.org/
?
Note that there are links to other ARISS websites from this site.
?
****************************************************************************
Looking for something new to do?? How about receiving DATV from the ISS??
Please note that the HamTV system has been brought back to earth for
troubleshooting.? Please monitor ARISS-EU or ARISS-ON for the very latest
news on the troubleshooting efforts.?
?
If interested, then please go to the ARISS-EU website for complete details.?
Look for the buttons indicating Ham Video.????????????
?
http://www.ariss-eu.org/
?
If you need some assistance, ARISS mentor Kerry N6IZW, might be able to
provide some insight.? Contact Kerry at kbanke@?????????.???
?
?
The HamTV webpage:? https://www.amsat-on.be/hamtv-summary/
?
?
****************************************************************************
ARISS congratulations the following mentors who have now mentored over 100
schools:
?
Francesco IK?WGF with 140 (***) ?
Satoshi 7M3TJZ with 136
Sergey RV3DR with 131
Gaston ON4WF with 123
?
****************************************************************************
The webpages listed below were all reviewed for accuracy. Out of date
webpages were removed, and new ones have been added.? If there are additional
ARISS websites I need to know about, please let me know.
?
?
?
Total number of ARISS ISS to earth school events is 1374.
Each school counts as 1 event.??????????????????????????????????
Total number of ARISS ISS to earth school contacts is 1307.
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is 48.
?
A complete year by year breakdown of the contacts may be found in the
file.
https://www.amsat.org/amsat/ariss/news/arissnews.rtf
?
Please feel free to contact me if more detailed statistics are needed.
?
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The following US states and entities have never had an ARISS contact:
South Dakota, Wyoming, American?Samoa, Guam, Northern Marianas Islands, and
the Virgin Islands.
?
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
?
QSL information may be found at:
https://www.ariss.org/qsl-cards.html
?
ISS callsigns: DP?ISS, IR?ISS, NA1SS, OR4ISS, RS?ISS
?
****************************************************************************
Frequency chart for packet, voice, and crossband repeater modes showing
Doppler correction as of 2005-07-29 04:00 UTC
https://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction.
rtf
Check out the Zoho reports of the ARISS contacts
?
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
?
Exp. 59 on orbit
Christina Koch
?
Exp. 60 on orbit
Luca Parmitano KF5KDP
Alexander Skvortsov
Drew Morgan KI5AAA
?
Exp. 61 on orbit
Oleg Skripochka
Jessica Meir
?
****************************************************************************
73,
Charlie?Sufana AJ9N
One of the ARISS operation team mentors
?
?
------------------------------
Message: 8
Date: Tue, 31 Dec 2019 11:10:16 -0500
From: Roy Dean <royldean@?????.???>
To: amsat-bb@?????.???
Subject: [amsat-bb] SSTV on Linears
Message-ID:
<CADGPg2tGRJxKDBRCodaNMSex9sJjjxVgomJ3VM=N2biiaHFegQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
>
> I did some SSTV years ago via AO-40. Really fun. But with a LEO
> satellite, you will need to be actively adjusting for Doppler shift in
> real time, as SSTV is frequency sensitive. You might try some of the
> faster modes, especially since a pass is over in just a few minutes. Greg
> KO6TH
I just did a dry run with my station, and think I'm ready to try an actual
pass. I will be operating in "Robot36" mode on CAS-4B (17:00z) and CAS-4A
(17:30z) this afternoon as first attempt. I plan on shooting for the
lower portion of the 2m passband (going to target the lowest published
downlink frequency). I will likely announce several times prior to first
transmitting to fine tune. My test image is very simple black and white
call/grid. If anybody hears it, please feel free to respond with an image
(short notice, I know), or voice. If you don't hear me, then something
came up to pull me away from my computer or I simply can't get in.
--Roy
K3RLD
------------------------------
Message: 9
Date: Tue, 31 Dec 2019 11:53:51 -0500
From: John Kludt <johnnykludt@?????.???>
To: Roy Dean <royldean@?????.???>
Cc: Amsat BB <amsat-bb@?????.???>
Subject: Re: [amsat-bb] SSTV on Linears
Message-ID:
<CABsMmtRZcuLxuaR55bUmP8OWs8PYgeOicYs0g-JK_Pvt8d2kPg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
Roy,
Have you checked this out with the control ops? I don't know but are there
any duty cycle issues to worry about? And given that a linear transponder
has a finite power budget what does it do to the other users? Maybe not a
big deal but I wonder if the sys ops for these birds have any words of
wisdom for us before we all start cranking up MMSSTV and banging away.
John
On Tue, Dec 31, 2019 at 11:14 AM Roy Dean via AMSAT-BB <amsat-bb@?????.???>
wrote:
> >
> > I did some SSTV years ago via AO-40. Really fun. But with a LEO
> > satellite, you will need to be actively adjusting for Doppler shift in
> > real time, as SSTV is frequency sensitive. You might try some of the
> > faster modes, especially since a pass is over in just a few minutes. Greg
> > KO6TH
>
>
> I just did a dry run with my station, and think I'm ready to try an actual
> pass. I will be operating in "Robot36" mode on CAS-4B (17:00z) and CAS-4A
> (17:30z) this afternoon as first attempt. I plan on shooting for the
> lower portion of the 2m passband (going to target the lowest published
> downlink frequency). I will likely announce several times prior to first
> transmitting to fine tune. My test image is very simple black and white
> call/grid. If anybody hears it, please feel free to respond with an image
> (short notice, I know), or voice. If you don't hear me, then something
> came up to pull me away from my computer or I simply can't get in.
>
> --Roy
> K3RLD
> _______________________________________________
> Sent via AMSAT-BB@?????.???. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
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!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 14, Issue 443
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