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CX2SA > SATDIG 01.06.16 12:26l 855 Lines 31529 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V11 176
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Sent: 160601/1007Z @:CX2SA.SAL.URY.SOAM #:44610 [Salto] FBB7.00e $:AMSATBB11176
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. EsHail Microwave transponder satellite (Remco)
2. JE9PEL/1 Satellite Listing (Chuck)
3. Re: JE9PEL/1 Satellite Listing (Paul Stoetzer)
4. Re: Polarization (Bob)
5. Upcoming ARISS Contact Schedule as of 2016-05-31 18:00 UTC
(AJ9N@xxx.xxxx
6. Re: Polarization (attitude mostly) (Robert Bruninga)
7. Re: Gesamtschule Leverkusen Schlebusch, Leverkusen, Germany,
(Daniel Cussen)
8. Re: Polarization (attitude mostly) (Bob)
9. Network Survey - Reminder and Thank You (Brandon Shirley)
10. Nusat 1/2 (PY5LF)
11. Re: Polarization (attitude mostly) (Daniel Cussen)
12. Re: Polarization (attitude mostly) (Blinov Igor)
----------------------------------------------------------------------
Message: 1
Date: Tue, 31 May 2016 17:35:06 +0200
From: Remco <pa3fym@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] EsHail Microwave transponder satellite
Message-ID: <201605311735.06309.pa3fym@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi Rico,
I'm fiddling with it and when the setup works I will publish
it. Frequency purity (phase noise etc) and stability is of paramount
importance.
A famous Dutch saying states:
"Don't sell the skin before you shot the bear." ;-)
I made a picture of my UMTS pallets, see:
http://remco.org/umts.jpg
These are (unfortunately) 26 - 28V modules, obtained from
a flea market for . . . 10 Euro each.
Remco PA3FYM
>Hi Remco,
>
>Sounds like you made a lot of progress on your Es'HailSat2 groundstation
>already. I would be interested to learn more about your transverter design
>and where you got the UMTS PA, and I'm sure some other people on this list
>too. :)
>
>Rico PA3RVG
------------------------------
Message: 2
Date: Tue, 31 May 2016 09:56:12 -0700
From: "Chuck" <cgbunn@xxxxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] JE9PEL/1 Satellite Listing
Message-ID: <000201d1bb5d$56dc0ef0$04942cd0$@xxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Greetings AMSAT-BB,
Reviewing JE9PEL/1 satellite listing
(http://www.ne.jp/asahi/hamradio/je9pel/satslist.htm) there are a good
number of satellites listed as FM such as AO-85 and others. Being somewhat
new to AMSAT I have to ask are all FM satellites noted on JE9PEL/1 list
available to amateur radio operators unless noted otherwise? Or are just the
communications FM satellites listed on AMSAT Communications Satellites web
page the only available FM satellites for amateur radio operators use?
Thanks &
Cheers Beers
Chuck
AI6OZ
------------------------------
Message: 3
Date: Tue, 31 May 2016 13:12:42 -0400
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: Chuck <cgbunn@xxxxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] JE9PEL/1 Satellite Listing
Message-ID:
<CABzOSOowr7PBG86RjNJ2GMpnza2jV01ZkhQLWodmXzY29L2FmQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Chuck,
The only currently available FM satellites are the ones listed on the
AMSAT Communications Satellites page: AO-85, SO-50, and sometimes
LilacSat-2.
73,
Paul, N8HM
On Tue, May 31, 2016 at 12:56 PM, Chuck <cgbunn@xxxxxxx.xxx> wrote:
> Greetings AMSAT-BB,
>
>
>
> Reviewing JE9PEL/1 satellite listing
> (http://www.ne.jp/asahi/hamradio/je9pel/satslist.htm) there are a good
> number of satellites listed as FM such as AO-85 and others. Being somewhat
> new to AMSAT I have to ask are all FM satellites noted on JE9PEL/1 list
> available to amateur radio operators unless noted otherwise? Or are just the
> communications FM satellites listed on AMSAT Communications Satellites web
> page the only available FM satellites for amateur radio operators use?
>
>
>
> Thanks &
>
> Cheers Beers
>
> Chuck
>
> AI6OZ
>
>
>
>
>
> _______________________________________________
> 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: Tue, 31 May 2016 13:51:33 -0400
From: Bob <WB4SON@xxxxx.xxx>
To: Doug Andrews <dougg27@xxxxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Polarization
Message-ID:
<CAPonRZ_=HYjs=eaOvzuW2WCKzMP59whXXpq4RViBwBmDfOzfXw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
"The antennas I see in the photos of satellites we work are whips. Is the
polarization becoming "circularized" as it re-enters earth's atmosphere or
something?"
Yep, that is exactly what is happening. It is called Faraday Rotation, and
as the signal from the satellite passes through the ionosphere, all sorts
of polarity changes can and do happen. A linear polarized satellite antenna
(horizontal or vertical) can appear to be the opposite or somewhere in
between. That's why folks rotate their Arrow or Elk antennas -- trying to
match the polarity.
Using a circular polarized antenna helps a bunch -- it doesn't matter what
the polarity of the linear satellite antenna happens to be at any moment in
time.
But there is no free lunch -- Even a circular polarized antenna might need
to be switched from Right Hand Circular Polarization (the default) to LHCP
from time to time depending on what nasty thing the ionosphere is doing at
any given moment. Changing the polarity switch might bring a S0 signal up
to S5, a 30 dB improvement. I had that happen to me during a recent ARISS
contact.
73, Bob, WB4SON
On Mon, May 30, 2016 at 8:25 PM, Doug Andrews <dougg27@xxxxxxx.xxx> wrote:
>
>
> I too have wondered about this.
> I have not had much trouble hitting SO-50 and some success on AO-85 with a
> 5 watt handheld and arrow antenna without turning it. Worth a try.
> DougKG7UNU
>
>
>
> Sent from my Sprint Samsung Galaxy? Note 4.
>
> -------- Original message --------
> From: Ken Alexander <k.alexander@xxxxxx.xxx>
> Date: 5/30/16 4:41 PM (GMT-08:00)
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Polarization
>
> I clipped this from another message because I didn't want to drag the
> discussion off course. It's a question I've been wondering about since
> getting into this a few short weeks ago.
>
> I've also read (but haven't tried yet) about the trick of rotating
> the antenna 90 degrees on transmit, once you've established the best
> receive orientation.
>
> 73 de Bill, KG5FQX
>
> So far, with SO-20 I have rotated my Arrow antenna for best reception of
> the downlink and don't think I've had too much trouble being heard. At
> the same time I have wondered whether I should twist the antenna when
> transmitting to orient the 2m elements to give the same polarization as
> in receive. I don't know if this is a good idea or not, and frankly I
> have enough trouble remembering calls and grids, tracking the satellite,
> adjusting frequency and switching back to the correct VFO to worry about
> one more thing.
>
> I've seen that some commercial OSCAR antennas use circular polarization.
> The antennas I see in the photos of satellites we work are whips. Is the
> polarization becoming "circularized" as it re-enters earth's atmosphere
> or something?
>
> Comments and observations would be most welcome!
>
> 73,
>
> Ken Alexander
> VE3HLS, FN03
>
> _______________________________________________
> 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: Tue, 31 May 2016 13:54:48 -0400
From: AJ9N@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2016-05-31
18:00 UTC
Message-ID: <12237.6e7320c4.447f29e8@xxx.xxx>
Content-Type: text/plain; charset="ISO-8859-1"
Upcoming ARISS Contact Schedule as of 2016-05-31 18:00 UTC
Quick list of scheduled contacts and events:
Bouze Island Elementary and Junior High School, Homeji, Japan, direct via
8N3B
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Timothy Peake KG5BVI
Contact is a go for: Sat 2016-06-04 08:31:09 UTC 74 deg
Glenmore State High School, Rockhampton, Queensland, Australia, telebridge
via W6SRJ
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Tim Kopra KE5UDN (***)
Contact is a go for: Mon 2016-06-06 08:39:31 UTC 31 deg (***)
****************************************************************************
**
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@xxxxx.xxx or aj9n@xxx.xxx.
****************************************************************************
***
All ARISS contacts are made via the Ericsson 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
http://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?
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@xxxxxxxxx.xxx
****************************************************************************
ARISS congratulations the following mentors who have now mentored over 100
schools:
Gaston ON4WF with 121
Satoshi 7M3TJZ with 118
Francesco IK?WGF with 116
****************************************************************************
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.
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 8061 date
and
time format YYYY-MM-DD HH:MM:SS
The complete schedule page has been updated as of 2016-05-31 18:00 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.
http://www.amsat.org/amsat/ariss/news/arissnews.rtf
Total number of ARISS ISS to earth school events is 1060.
Each school counts as 1 event.
Total number of ARISS ISS to earth school contacts is 1025.
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is 47.
A complete year by year breakdown of the contacts may be found in the
file.
http://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:
Arkansas, Delaware,South Dakota,Wyoming, American Samoa, Guam, Northern
Marianas Islands, and the Virgin Islands.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
QSL information may be found at:
http://www.ariss.org/qsl-cards.html
ISS callsigns: DP?ISS, IR?ISS, NA1SS, OR4ISS, RS?ISS
****************************************************************************
The successful school list has been updated as of 2016-05-31 07:00 UTC.
http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
Frequency chart for packet, voice, and crossband repeater modes showing
Doppler correction as of 2005-07-29 04:00 UTC
http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction
.rtf
Listing of ARISS related magazine articles as of 2006-07-10 03:30 UTC.
http://www.amsat.org/amsat/ariss/news/ARISS_magazine_articles.rtf
Check out the Zoho reports of the ARISS contacts
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
****************************************************************************
Exp. 46 on orbit
Tim Kopra KE5UDN
Timothy Peake KG5BVI
Yuri Malenchenko RK3DUP
Exp. 47 on orbit
Jeff Williams KD5TVQ
Oleg Skripochka RN3FU
Aleksey Ovchinin
****************************************************************************
73,
Charlie Sufana AJ9N
One of the ARISS operation team mentors
------------------------------
Message: 6
Date: Tue, 31 May 2016 16:20:52 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Polarization (attitude mostly)
Message-ID: <7a89efd0087577f906ca6be9842498c8@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Actually, I would tend to suggest the majority of polarization shift is
simply due to the always changing attitude of the spacecraft with respect to
the user.
The fact that all TVRO Satellite dishes worked perfectly well when switching
back and forth from horizontal to vertical polarization when changing
channels and once the dish was initially aligned then those vertical and
horizontal polarizations remained accurate across the entire sky and across
the many dozens of satellites, then would suggest th contribution due to
faraday rotation was small (at C band anyway)...
Yes, there is some faraday rotations at HF and at extremely low elevations,
but I think for one using an ARROW antenna, all of the polarity issues are
simply due to the instantaneous orientation of the satellite. Not the
ionosphere...
But, just my humble opinion...
Bob
WB4APR
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Bob
Sent: Tuesday, May 31, 2016 1:52 PM
To: Doug Andrews
Cc: AMSAT-BB
Subject: Re: [amsat-bb] Polarization
"The antennas I see in the photos of satellites we work are whips. Is the
polarization becoming "circularized" as it re-enters earth's atmosphere or
something?"
Yep, that is exactly what is happening. It is called Faraday Rotation, and
as the signal from the satellite passes through the ionosphere, all sorts of
polarity changes can and do happen. A linear polarized satellite antenna
(horizontal or vertical) can appear to be the opposite or somewhere in
between. That's why folks rotate their Arrow or Elk antennas -- trying to
match the polarity.
Using a circular polarized antenna helps a bunch -- it doesn't matter what
the polarity of the linear satellite antenna happens to be at any moment in
time.
But there is no free lunch -- Even a circular polarized antenna might need
to be switched from Right Hand Circular Polarization (the default) to LHCP
from time to time depending on what nasty thing the ionosphere is doing at
any given moment. Changing the polarity switch might bring a S0 signal up
to S5, a 30 dB improvement. I had that happen to me during a recent ARISS
contact.
73, Bob, WB4SON
On Mon, May 30, 2016 at 8:25 PM, Doug Andrews <dougg27@xxxxxxx.xxx> wrote:
>
>
> I too have wondered about this.
> I have not had much trouble hitting SO-50 and some success on AO-85
> with a
> 5 watt handheld and arrow antenna without turning it. Worth a try.
> DougKG7UNU
>
>
>
> Sent from my Sprint Samsung Galaxy? Note 4.
>
> -------- Original message --------
> From: Ken Alexander <k.alexander@xxxxxx.xxx>
> Date: 5/30/16 4:41 PM (GMT-08:00)
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Polarization
>
> I clipped this from another message because I didn't want to drag the
> discussion off course. It's a question I've been wondering about
> since getting into this a few short weeks ago.
>
> I've also read (but haven't tried yet) about the trick of rotating the
> antenna 90 degrees on transmit, once you've established the best
> receive orientation.
>
> 73 de Bill, KG5FQX
>
> So far, with SO-20 I have rotated my Arrow antenna for best reception
> of the downlink and don't think I've had too much trouble being heard.
> At the same time I have wondered whether I should twist the antenna
> when transmitting to orient the 2m elements to give the same
> polarization as in receive. I don't know if this is a good idea or
> not, and frankly I have enough trouble remembering calls and grids,
> tracking the satellite, adjusting frequency and switching back to the
> correct VFO to worry about one more thing.
>
> I've seen that some commercial OSCAR antennas use circular polarization.
> The antennas I see in the photos of satellites we work are whips. Is
> the polarization becoming "circularized" as it re-enters earth's
> atmosphere or something?
>
> Comments and observations would be most welcome!
>
> 73,
>
> Ken Alexander
> VE3HLS, FN03
>
> _______________________________________________
> 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: 7
Date: Tue, 31 May 2016 22:28:51 +0100
From: Daniel Cussen <dan@xxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Cc: hamtv <hamtv@xxxxxxxxxxx.xx>
Subject: Re: [amsat-bb] Gesamtschule Leverkusen Schlebusch,
Leverkusen, Germany,
Message-ID:
<CAF3DnKioZU1zyhjeRDKGUNqkiyr1Cef8yJ9HSy7k2nE=zWdozQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I found an additional video(s) online from this contact last February.
It shows hamtv also.
https://youtu.be/u9QPr6bsiSM
Translation of the additional information:
On 29.02.2016, the students of the Secondary School Schlebusch could
successfully produce a ISS school contact together with a team from
the German Amateur Radio Club, Ortsverband Leverkusen G11.
It all 20 questions have been answered, which is certainly not
self-evident. We also had a live picture of the astronauts Timothy
Peake (HamTV Streamed through the Internet from Cork in Ireland).
Our thanks to the school is who has supported us actively and
promptly, the numerous media representatives, the YL and OM have
sacrificed much free time and of course the students who have made
contact with a very successful event.
The video is very improvised, actually it should be only an audio
replay ;-) We still look forward to your comments, so skin in the
keys!
Media coverage:
Newspaper articles:
http://www1.wdr.de/nachrichten/rheinland/schueler-funken-zur-iss100.html
http://www.koelner-wochenspiegel.de/rag-kws/docs/1277884/nrwaktuell
http://www.lokale-informationen.de/rag-lag/docs/1277881/leverkusen
http://www.ksta.de/region/leverkusen/stadt-leverkusen/liveuebertragung-in-der-
aula-leverkusener-schueler-kontaktieren-iss-raumstation-23640036
http://www.rp-online.de/nrw/staedte/leverkusen/leverkusen-ruft-iss-gesamtschue
ler-telefonieren-mit-der-weltraumstation-iss-aid-1.5802161
http://www.southgatearc.org/news/2016/february/ariss_event_2902.htm#.VtWFk_nhC
Uk
http://www.leverkusen.com/presse/db/presse.php?view=00033909&stadtteil=&kat=
TV:
RTL West:
http://www.rtl-west.de/livestream/sendung/2016-02-29/PGM2902/
WDR:
http://www1.wdr.de/mediathek/video/sendungen/lokalzeit-koeln/video-schueler-au
s-leverkusen-funken-mit-der-iss-100.html
Radio:
http://www1.wdr.de/mediathek/audio/wdr5/wdr5-westblick/audio-wdr--westblick---
ganze-sendung-236.html
Youtube:
https://www.youtube.com/watch?v=u9QPr6bsiSM
https://www.youtube.com/watch?v=mbAqrpEFM5o
https://www.youtube.com/watch?v=TkPbHo8mrwk
https://www.youtube.com/watch?v=oWKXP64VIy4
Facebook:
https://www.facebook.com/permalink.php?story_fbid=1704760526434985&id=16856461
28346425
On 29/02/2016, Daniel Cussen <dan@xxxx.xxx> wrote:
> Gesamtschule Leverkusen Schlebusch, Leverkusen, Germany, direct via DL?IL
> The ISS callsign is presently scheduled to be OR4ISS
> The scheduled astronaut is Timothy Peake KG5BVI
> Contact is a go for: Mon 2016-02-29 12:05:58 UTC 78 deg
------------------------------
Message: 8
Date: Tue, 31 May 2016 17:36:42 -0400
From: Bob <WB4SON@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Polarization (attitude mostly)
Message-ID:
<CAPonRZ9yyGy17RNghoOhwn=4z2K9K6_rg-SL9gVG5J1wt_9RPg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
That is an excellent observation about the use of horizontal or vertical
polarization for geostationary satellites -- obviously that works well in
that case (much higher frequencies and zero relative motion).
Perhaps it is a combination of relative motion and signals passing through
different parts of the ionosphere that causes the problem. When talking
about VHF signals coming from the ISS in particular there isn't any random
attitude change (unlike a tumbling/spinning satellite). Certainly there is
a slow and predictable change in attitude due to relative motion. If that
is all it was, then a single RHCP or LHCP antenna would do the trick 100%
of the time.
The ARISS crew highly recommends the use of CP antennas (certainly
understandable) AND polarity switches. I pushed back on that requirement
due to cost and availability issues, but went ahead and installed the
polarity switch on our CP antennas. With certainty I can tell you that at
random times it made a huge difference in downlink signal level.
The effect usually happened close to the horizon -- perhaps the VHF signals
are undergoing polarity changes due to tropospheric ducting. But the use of
a CP polarity switch proved to be very useful. Sometimes it might not
happen at all. And at least once it happened near the point of closest
approach.
it is an interesting issue for sure, and not much literature on it.
73, Bob, WB4SON
------------------------------
Message: 9
Date: Tue, 31 May 2016 21:39:20 +0000
From: Brandon Shirley <Brandon.Shirley@xxx.xxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Network Survey - Reminder and Thank You
Message-ID: <79af3fd68d214403a224087c3ac8a793@xx.xxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Dear AMSAT community members,
This is the final reminder email for the Network Survey. I will close the
survey tomorrow night (23:59 MST on Wednesday). If you were planning on
participating, but have not, then please try to get it done before then. I
am very grateful to all those who have participated in this survey and all
the surveys to this point. Thank you.
I will notify the winners of this survey's $25 gift card and the overall
survey set's $200 gift cards in the next couple of days, so please watch
your email if you are interested in the gift cards. The gift cards for the
other surveys have already been awarded.
You can still take it in stages if you want. To do this you must resume or
visit the link in the same browser on the same computer and have cookies
turned on as this survey tracks your session: no other identifying
information is collected or stored.
You can you use the link below to access the Network Survey.
https://usu.co1.qualtrics.com/SE/?SID=SV_3jAwt3PdKrcSEx7
What follows is more information about the survey and is largely the same as
what you have seen before.
There is a chance to win some gift cards. Please see below for more
information. The survey should take about 15 minutes. Thanks.
Please note that the link is anonymous, so you are getting this reminder
even if you have already taken the survey. I would like to thank everyone
that has participated thus far, I really appreciate it, I know it is an
inconvenience and that everyone is really busy.
The second part of the survey has background questions that will give
context to your answers. Try to fill the background out the same way if you
take more than one of the surveys.
Answer as many of the questions as you want and as much of each question as
you want, partial surveys may still be very helpful. At the end of this
survey, you will be redirected to a webpage that asks for an email address.
You must enter a valid email address to be considered for survey drawings or
the overall survey set drawing.
We are currently on the last survey, Network Survey.
V/R,
Brandon Shirley
mailto:b.l.s@xxxxxxxxx.xxx.xxx
Please see the
http://brandon.bluezone.usu.edu/Files/LOISpaceSoftwareAttitudes_Final.pdf
that explains your role as a participant should you choose to participate.
This is a legitimate request for you participation, if you have any
questions about the validity of this email you may refer to the Letter of
Intent, contact Brandon Shirley via email at mailto:b.l.s@xxxxxxxxx.xxx.xxxx
or contact Utah State University's Internal Review Board administrator at
(435) 797 - 0567 or email mailto:irb@xxx.xxx.
------------------------------
Message: 10
Date: Tue, 31 May 2016 18:56:35 -0300
From: PY5LF <py5lf@xxxxxxxxxxxxx.xxx.xx>
To: AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Nusat 1/2
Message-ID:
<CAAy53m71QmD6m4kfwxVb6izX5MaBX1LD4LphB2=TDGrX-0D8jA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi
Telemetry signal of NUSAT over here ;
https://youtu.be/m8I51eJTkg8
73
PY5LF
------------------------------
Message: 11
Date: Wed, 1 Jun 2016 10:00:00 +0100
From: Daniel Cussen <dan@xxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Polarization (attitude mostly)
Message-ID:
<CAF3DnKjEAeJob7OQ_dnEydowb=+aKZ6+y-oK8jxhW0T9+4mf8A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
> I pushed back on that requirement
> due to cost and availability issues, but went ahead and installed the
> polarity switch on our CP antennas. With certainty I can tell you that at
> random times it made a huge difference in downlink signal level.
There was discussion on the ARISS OPs mailing list as to what to
recommend to schools and what would give best "bang for buck" I am
still not 100% convinced that a RHCP/LHCP switch is indeed necessary
for ARISS contacts. The only way to confirm would be one station with
both RHCP and LHCP both receiving at the exact same time and logging
or recording the results. Most/all stations that have said the switch
helped have not compared in real time not switching. Over time the ISS
signal can vary wildly, in particular the solar panels can totally
block the signal completely from time to time. There is a couple of
stations with dual VHF circular systems (mostly ARISS tele-bridge
ground stations) and I have asked them to help. Until we have real
world comparisons at least in the case of the ISS, I am not sure a
switch is needed. Can someone do tests to check?
------------------------------
Message: 12
Date: Wed, 01 Jun 2016 13:03:37 +0300
From: Blinov Igor <rw3xl@xx.xx>
To: "dan@xxxx.xxxx <dan@xxxx.xxx>, AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Polarization (attitude mostly)
Message-ID: <3714141464775417@xxxxxx.xxxxxx.xx>
Content-Type: text/plain; charset=koi8-r
I'm working via SO-50 with different two antenna(436CP42UG, one RHCP, one
LHCP, single mast, single rotator), which connect to two different radio,
which connect audio output to different headphones. Observation is - when
signal is going to zero in one channel, other channel is going up to maximum
level. For one pass situation changes 4-6 times.
01.06.2016, 12:00, "Daniel Cussen" <dan@xxxx.xxx>:
>> ?I pushed back on that requirement
>> ?due to cost and availability issues, but went ahead and installed the
>> ?polarity switch on our CP antennas. With certainty I can tell you that at
>> ?random times it made a huge difference in downlink signal level.
>
> There was discussion on the ARISS OPs mailing list as to what to
> recommend to schools and what would give best "bang for buck" I am
> still not 100% convinced that a RHCP/LHCP switch is indeed necessary
> for ARISS contacts. The only way to confirm would be one station with
> both RHCP and LHCP both receiving at the exact same time and logging
> or recording the results. Most/all stations that have said the switch
> helped have not compared in real time not switching. Over time the ISS
> signal can vary wildly, in particular the solar panels can totally
> block the signal completely from time to time. There is a couple of
> stations with dual VHF circular systems (mostly ARISS tele-bridge
> ground stations) and I have asked them to help. Until we have real
> world comparisons at least in the case of the ISS, I am not sure a
> switch is needed. Can someone do tests to check?
> _______________________________________________
> 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
--?
? ?????????, ?????, RW3XL
------------------------------
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 176
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