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CX2SA > SATDIG 27.04.17 02:01l 859 Lines 28450 Bytes #999 (0) @ WW
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Read: GUEST
Subj: AMSAT-BB-digest V12 113
Path: IW8PGT<CX2SA
Sent: 170426/2359Z @:CX2SA.SAL.URY.SOAM #:5865 [Salto] FBB7.00e $:AMSATBB12113
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Delayed Gratification (Ken Alexander)
2. DM02 Lid Ship (Mike Diehl)
3. HamRadioNow W4FS and KG4AKV interview and SO-50 demo video
(John Brier)
4. ISS Packet Frequency? (Scott)
5. Don't say TOMORROW (Ronald G. Parsons)
6. Re: ISS Packet Frequency? (Graham)
7. SDRplay RSP1 for sale (Stefan Wagener)
8. Re: ISS Packet Frequency? (Scott)
9. Want to buy: Yaesu FT-817 (Tucker McGuire)
10. ISS Packet Frequency? (Stewart Todd Morgan)
11. Upcoming ARISS contact with Lyc?e H?l?ne Boucher, Thionville,
France (n4csitwo@xxxxxxxxx.xxxx
12. ISS Packet Frequency? (Stewart Todd Morgan)
----------------------------------------------------------------------
Message: 1
Date: Mon, 24 Apr 2017 18:39:50 +0000 (UTC)
From: Ken Alexander <k.alexander@xxxxxx.xxx>
To: Ken Alexander <k.alexander@xxxxxx.xxx>, John Brier
<johnbrier@xxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Delayed Gratification
Message-ID: <461054261.9253029.1493059190330@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Yes! Wish I'd thought of that!
--------------------------------------------
On Mon, 4/24/17, John Brier <johnbrier@xxxxx.xxx> wrote:
Subject: Re: [amsat-bb] Delayed Gratification
To: "Ken Alexander" <k.alexander@xxxxxx.xxx>
Cc: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Date: Monday, April 24, 2017, 1:49 PM
Could
this also be called delayed GRIDification?
;-)
73, John Brier KG4AKV
On Mon, Apr 24, 2017 at
1:26 PM, Ken Alexander <k.alexander@xxxxxx.xxx>
wrote:
Fellow
Satelliteers,
My fiancee has requested my presence for a few weeks in
July.? I can't afford the vacation time or the money to
visit her in HS-land and do the grid expedition in May.?
So, the grid expedition will have to wait until the fall,
and it will likely be a shorter trip because there won't
be enough time to build up sufficient vacation hours.?
That's the way it goes.
I will still be getting away for weekend expeditions in the
coming months.? FN27/28 comes to mind.? We have a long
weekend up here the third weekend in May.? I'll see
what I can do then!
73,
Ken Alexander
VE3HLS
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------------------------------
Message: 2
Date: Mon, 24 Apr 2017 13:04:10 -0700
From: Mike Diehl <diehl.mike.a@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] DM02 Lid Ship
Message-ID: <8F807CA0-C356-46D2-90E0-4AFD0E1948FB@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Fellow ops of the OSCARs,
Sending out a reminder that this weekend will be your opportunity to get
DM02 in your log. Upon arrival, K6G will work every pass that has footprint
on both FM and linear with multiple ops planned for the passband. Since any
form of cellular service will be nonexistent we plan to use Iridium for
uploading to LOTW as Gabe has done on other trips. Paper QSLs will be put in
a bottle and set adrift in the Pacific.
Happy grid chasing and we hope to catch you on the birds.
73,
Mike Diehl
AI6GS
------------------------------
Message: 3
Date: Mon, 24 Apr 2017 17:45:03 -0400
From: John Brier <johnbrier@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] HamRadioNow W4FS and KG4AKV interview and SO-50
demo video
Message-ID:
<CALn0fKNCGYj-TN-aLiM0zk4daVhr0-PoAb5isDoUT55gu7ssXg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Gary, KN4AQ of HamRadioNow has just uploaded his latest show which includes
an interview with Tucker, W4FS and me, KG4AKV, after we did satellite demos
at the Raleigh Amateur Radio Society hamfest (RARSfest) a couple weeks ago.
Latest show with interview:
https://www.youtube.com/watch?v=sKZ73sRdAAw
His video of my SO-50 demo. He actually edited this from my footage:
https://www.youtube.com/watch?v=7dhJsfh6fYA
73, John Brier KG4AKV
------------------------------
Message: 4
Date: Mon, 24 Apr 2017 18:20:02 -0400
From: Scott <scott23192@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ISS Packet Frequency?
Message-ID:
<CAJCSnOZiu4RUz32C1R2S2BsiFikg__DxQayx4JJUxHrHXP6SOQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi everybody.
This is essentially a request for what I believe the scientific folks call
"peer review"...
I continue to try to understand why none of my equipment has been receiving
the ISS digipeater very well since the switch back to 2 meters, despite the
fact that the same hardware does well on terrestrial packet and in the case
of 145.825 in particular, I have even received packets from PSAT since
re-configuring for VHF reception on my Raspberry Pi / RTL-SDR iGate. So,
my point is that it isn't that NOTHING is working on 2-meter packet or
145.825 here. And as I've mentioned in the past, I hear from others with
similar stories so we're not sharing hardware or location.
This evening there was a favorable pass here and I see on ariss.net that
several stations were digipeated while the ISS was over the U.S. Great
news!
I monitored that pass in receive-only mode with the same type of TXCO
version-3 RTL-SDR that I use for my iGate. The results were very strange
and I hope incorrect. I certainly would appreciate it if someone might
repeat my test when time permits.
Here is an image showing my SDR tuned to the local NOAA Weather Radio on
162.475. By all appearances, my frequency display is accurate in the VHF
band.
https://www.dropbox.com/s/w1dll06xwinteap/NOAA-Wx-Radio-on-freq.png?raw=1
... without changing any settings other than frequency, the following image
shows a Spectra-Vue plot of my reception of the packet transmissions from
the ISS on this evening's pass:
https://www.dropbox.com/s/s46o3pi87yk9t2h/spec-view.png?raw=1
... I took a ballpark stab at the center point of closest approach and
unless I did something awfully wrong, it's roughly 5 KHz above the expected
145.825 frequency. If by any chance this is accurate, it explains why I've
been seeing poor reception here.
(On the other hand, if my observations are completely wrong and flawed,
this makes just over 1000 times that I've looked foolish!)
Anyway, if anyone is setup to make similar observations, I would imagine
that we would all like to know if there is a frequency issue up there. If
not, then of course I'm sorry to tie up the mailing list!
73!
-Scott, K4KDR
Montpelier, VA USA
------------------------------
Message: 5
Date: Mon, 24 Apr 2017 18:22:41 -0500
From: "Ronald G. Parsons" <w5rkn@xxxxx.xxx>
To: "AMSAT-BB" <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Don't say TOMORROW
Message-ID: <150D3C0B8DAE4E8FB6150C6EE7A62CE2@xxxxxxxxx>
Content-Type: text/plain; charset="utf-8"
If you are announcing an event, don?t say ?tomorrow.? Give a date including
the day of the week.
It can be hard to determine the reference date. For example, an announcement
on the digest will have two base dates ? the date it was posted and the date
of the digest. And they can be different.
Please be specific.
Ron W5RKN
------------------------------
Message: 6
Date: Tue, 25 Apr 2017 00:33:00 +0000
From: Graham <planophore@xxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] ISS Packet Frequency?
Message-ID: <7fde043a-6e11-a5b4-4c57-c2dd81aec45b@xxx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Scott,
I had a look at the two noted images. The first thing that I noticed was
that the mode was set in both cases to wide band FM not narrow band FM.
If you are trying to copy ISS packet using WBFM that might be the source
of your problem. It could be that the new radio on the ISS has a
somewhat lower deviation than the old radio. The second image
(Spectravue) does indicate that your receive might be a bit high in
frequency.
If you are not using your SDR to try and copy the ISS then perhaps you
should state what equipment you are in fact using; I may have missed it
from an earlier post.
I have been having good luck copying the ISS using my FT-817. Sometimes
I use a dual band VHF/UHF collinear vertical and sometimes a small yagi,
the yagi works better but the vertical still works OK too. I don't
adjust for doppler, I just set the FT-817 to 145.825. Doppler on 145.825
for a typical pass is about +/- 3.5 kHz at least according to GPredict.
cheers, Graham ve3gtc
On 2017-04-24 22:20, Scott wrote:
> Hi everybody.
>
> This is essentially a request for what I believe the scientific folks call
> "peer review"...
>
> I continue to try to understand why none of my equipment has been receiving
> the ISS digipeater very well since the switch back to 2 meters, despite the
> fact that the same hardware does well on terrestrial packet and in the case
> of 145.825 in particular, I have even received packets from PSAT since
> re-configuring for VHF reception on my Raspberry Pi / RTL-SDR iGate. So,
> my point is that it isn't that NOTHING is working on 2-meter packet or
> 145.825 here. And as I've mentioned in the past, I hear from others with
> similar stories so we're not sharing hardware or location.
>
> This evening there was a favorable pass here and I see on ariss.net that
> several stations were digipeated while the ISS was over the U.S. Great
> news!
>
> I monitored that pass in receive-only mode with the same type of TXCO
> version-3 RTL-SDR that I use for my iGate. The results were very strange
> and I hope incorrect. I certainly would appreciate it if someone might
> repeat my test when time permits.
>
> Here is an image showing my SDR tuned to the local NOAA Weather Radio on
> 162.475. By all appearances, my frequency display is accurate in the VHF
> band.
>
> https://www.dropbox.com/s/w1dll06xwinteap/NOAA-Wx-Radio-on-freq.png?raw=1
>
>
> ... without changing any settings other than frequency, the following image
> shows a Spectra-Vue plot of my reception of the packet transmissions from
> the ISS on this evening's pass:
>
> https://www.dropbox.com/s/s46o3pi87yk9t2h/spec-view.png?raw=1
>
>
> ... I took a ballpark stab at the center point of closest approach and
> unless I did something awfully wrong, it's roughly 5 KHz above the expected
> 145.825 frequency. If by any chance this is accurate, it explains why I've
> been seeing poor reception here.
>
> (On the other hand, if my observations are completely wrong and flawed,
> this makes just over 1000 times that I've looked foolish!)
>
> Anyway, if anyone is setup to make similar observations, I would imagine
> that we would all like to know if there is a frequency issue up there. If
> not, then of course I'm sorry to tie up the mailing list!
>
> 73!
>
> -Scott, K4KDR
> Montpelier, VA USA
>
------------------------------
Message: 7
Date: Mon, 24 Apr 2017 19:48:30 -0500
From: Stefan Wagener <wageners@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] SDRplay RSP1 for sale
Message-ID:
<CAKu8kHCExtZDJv4+GFs=+sPhtkbOr=i3WhPZD4LQJb7O2b93rw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Selling a like new unit.
$90 incl. shipping to US and Canada. Email me offline at : "mycallsign"@
gmail.com
Thanks, Stefan, VE4NSA
------------------------------
Message: 8
Date: Mon, 24 Apr 2017 21:00:12 -0400
From: Scott <scott23192@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] ISS Packet Frequency?
Message-ID:
<CAJCSnOZtYepuU0NMBLv--PuQ096emH5Fet4fbc__bR6aYp=iAQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Thanks for the feedback, Graham!
I wasn't concerned with demod or decoding packets on this particular night;
but rather to run a wide-band capture with no doppler correction to allow
the transmitted signal to paint the doppler curve on my display to identify
the center crossing at closest approach. That does a number of things for
me like identify the transmitted frequency (at least as received by my
hardware), verify my TLE's, and to get a visualization of how much doppler
shift is occurring between AOS & LOS.
It does interest me quite a bit to try to characterize differences between
those who are seeing better performance -vs- those who are not, so you're
right on to mention hardware. We can't generalize, but I see "some"
evidence since the freq change that the group having better luck might be
those with equipment like the FT-817 and the folks using the excellent
Kenwood HT's. But it goes without saying that with such a large sample
group, a VERY large number of people could step forward with minimal
equipment reporting good success as well. From my own testing I can
observe that I decode way more packets with an SDRPLay than with a cheap
mobile rig or generic RTL-SDR. I know that sounds obvious (that superior
hardware gives superior results) but that's not my point... rather that it
just "feels" like that wasn't so much the case with the previous 2-meter
setup.
I could easily be wrong but when it seems like some experimentation might
provide some useful info to improve everyone's enjoyment of the resource, I
have a hard time leaving it alone!
============================
On Mon, Apr 24, 2017 at 8:33 PM, Graham <planophore@xxx.xx> wrote:
> Scott,
>
> I had a look at the two noted images. The first thing that I noticed was
> that the mode was set in both cases to wide band FM not narrow band FM. If
> you are trying to copy ISS packet using WBFM that might be the source of
> your problem. It could be that the new radio on the ISS has a somewhat
> lower deviation than the old radio. The second image (Spectravue) does
> indicate that your receive might be a bit high in frequency.
>
> If you are not using your SDR to try and copy the ISS then perhaps you
> should state what equipment you are in fact using; I may have missed it
> from an earlier post.
> I have been having good luck copying the ISS using my FT-817. Sometimes I
> use a dual band VHF/UHF collinear vertical and sometimes a small yagi, the
> yagi works better but the vertical still works OK too. I don't adjust for
> doppler, I just set the FT-817 to 145.825. Doppler on 145.825 for a typical
> pass is about +/- 3.5 kHz at least according to GPredict.
>
> cheers, Graham ve3gtc
>
> ===========================================
>
>
> On 2017-04-24 22:20, Scott wrote:
>
>> Hi everybody.
>>
>> This is essentially a request for what I believe the scientific folks call
>> "peer review"...
>>
>> I continue to try to understand why none of my equipment has been
>> receiving
>> the ISS digipeater very well since the switch back to 2 meters, despite
>> the
>> fact that the same hardware does well on terrestrial packet and in the
>> case
>> of 145.825 in particular, I have even received packets from PSAT since
>> re-configuring for VHF reception on my Raspberry Pi / RTL-SDR iGate. So,
>> my point is that it isn't that NOTHING is working on 2-meter packet or
>> 145.825 here. And as I've mentioned in the past, I hear from others with
>> similar stories so we're not sharing hardware or location.
>>
>> This evening there was a favorable pass here and I see on ariss.net that
>> several stations were digipeated while the ISS was over the U.S. Great
>> news!
>>
>> I monitored that pass in receive-only mode with the same type of TXCO
>> version-3 RTL-SDR that I use for my iGate. The results were very strange
>> and I hope incorrect. I certainly would appreciate it if someone might
>> repeat my test when time permits.
>>
>> Here is an image showing my SDR tuned to the local NOAA Weather Radio on
>> 162.475. By all appearances, my frequency display is accurate in the VHF
>> band.
>>
>> https://www.dropbox.com/s/w1dll06xwinteap/NOAA-Wx-Radio-on-freq.png?raw=1
>>
>>
>> ... without changing any settings other than frequency, the following
>> image
>> shows a Spectra-Vue plot of my reception of the packet transmissions from
>> the ISS on this evening's pass:
>>
>> https://www.dropbox.com/s/s46o3pi87yk9t2h/spec-view.png?raw=1
>>
>>
>> ... I took a ballpark stab at the center point of closest approach and
>> unless I did something awfully wrong, it's roughly 5 KHz above the
>> expected
>> 145.825 frequency. If by any chance this is accurate, it explains why
>> I've
>> been seeing poor reception here.
>>
>> (On the other hand, if my observations are completely wrong and flawed,
>> this makes just over 1000 times that I've looked foolish!)
>>
>> Anyway, if anyone is setup to make similar observations, I would imagine
>> that we would all like to know if there is a frequency issue up there. If
>> not, then of course I'm sorry to tie up the mailing list!
>>
>> 73!
>>
>> -Scott, K4KDR
>> Montpelier, VA USA
>
>
------------------------------
Message: 9
Date: Mon, 24 Apr 2017 21:40:36 -0400
From: Tucker McGuire <tucker@xxxxxxxxxxx.xxx>
To: AMSAT -BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Want to buy: Yaesu FT-817
Message-ID:
<CA+gmQJRcdVT-y66d=LAYpJqFQ3zFn9n38oYJZLXjgxa2GH0P+w@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi Group,
I'm looking for a cheap Yaesu FT-817. Can be one with blown finals (Receive
only) or a fully functioning one. If you have one you'd like to sell let me
know.
Cheers & 73,
Tucker
W4FS
------------------------------
Message: 10
Date: Tue, 25 Apr 2017 10:10:24 -0400
From: Stewart Todd Morgan <morgan_st@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ISS Packet Frequency?
Message-ID: <22b00a75-d04d-38d7-d610-82c95fa36e97@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
I used an Alinco DJ-X11T receiver in SDR mode to record an 80 degree ISS
pass at 13:33:53 UTC this morning. The packet signals did appear on the
expected frequency given Doppler shift (centered on 145.825 MHz).
However, there does appear to be an issue with the packet
transmissions. Scott's Dropbox image of the pass over several minutes
compressed the packet transmissions to the point that the issue is not
visible in his image, but it is quite apparent in my waterfall which
only shows about 20 seconds at a time in KGSDR. Namely, the centerlines
of all packet transmissions describe a "J" shape, even at AOS and LOS
when Doppler should not be noticeable at all. In other words, there is
a rapid increase in transmitted frequency at the start of a packet
transmission, and this frequency change rate diminishes toward the end
of the transmission. This phenomenon could very well cause some
receiving systems to fail to decode packets.
I tested my system against local terrestrial packet stations just prior
to the pass, and the packets show vertical lines in the waterfall, so
this is not some systemic issue in my receiving system.
Todd
AL0I
------------------------------
Message: 11
Date: Wed, 26 Apr 2017 16:34:53 -0400
From: <n4csitwo@xxxxxxxxx.xxx>
To: <ariss-press@xxxxx.xxx>, "amsat-edu" <amsat-edu@xxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Upcoming ARISS contact with Lyc?e H?l?ne Boucher,
Thionville, France
Message-ID: <9E538E6A49BB445F8BFA47768417D4F6@xxx>
Content-Type: text/plain; charset="iso-8859-1"
An International Space Station school contact has been planned with
participants at Lyc?e H?l?ne Boucher, Thionville, France on 27 Apr. The
event is scheduled to begin at approximately 08:52 UTC. The duration of the
contact is approximately 9 minutes and 30 seconds. The contact will be
direct between FX0ISS and F8KGY. The contact should be audible over France
and adjacent areas. Interested parties are invited to listen in on the
145.80 MHz downlink. The contact is expected to be conducted in French.
Thionville is a commune in the Moselle department in north-eastern France,
close to the Luxembourg border. The city is located on the left bank of the
river Moselle. Thionville is well-known for the Steelmaking activity until
years 1970, and for the Malbrouck Castle nearby (15th Century). More than
1000 pupils from 11 to 18 attend Helene Boucher High-School in Thionville.
The school is preparing students for the "Baccalaur?at Litt?raire,
Economique et Scientifique" Some students, aged 15, have preparing their
HAM-radio license to be able to use the equipment on D-Day. Other students
aged 15, are also working on an educational model project which will allow
them to show how to use the equipment necessary to get in touch with ISS, to
younger students. These same students would also like to present this
educational model and the project itself to compete for "Olympiades de
Physique", a prestigious challenge, open to all French high-school students.
A scientific club called "Obje
ctif Mars" (Mars Objective) has existed for three years at H?l?ne Boucher
high-school. It work's on:
The computer programming of self-sufficient robots,
The making and the launching of micro-rockets,
The making and the use of an astronomical telescope.
Getting in touch with ISS is part of the same project "Objectif Mars".
Participants will ask as many of the following questions as time allows:
1. Comment les passagers de l'ISS s'arrangent-ils pour leurs cycles de
sommeil?
2. Comment r?agit l'horloge biologique face ? la disparition du rep?re
jour/nuit?
3. Comment la station ISS parvient-elle ? ?tre autonome en ?lectricit??
4. Quand vous transpirez apr?s une s?ance de sport, comment vous douchez-
vous?
5. Pouvez-vous nous montrer un objet en apesanteur? (camera HAM-Video)
6. Est-ce que la micro pesanteur ressentie lors d'un vol z?ro-G est la m?me
que l'apesanteur ressentie dans la station?
7. Est-ce que l'entra?nement suffit pour supporter l'acc?l?ration subie lors
du d?collage de la fus?e?
8. Quel avantage l'apesanteur vous procure-t-il lors de vos exp?riences
scientifiques?
9. Comment la station ISS et vous-m?mes ?tes affect?s par une ?ruption
solaire?
10. Comment la station est-elle prot?g?e contre les rayonnements cosmiques et
les vents solaires?
11. Comment faites-vous pour vous soigner en cas de besoin? (maladie,
blessure, etc..)
12. Comment fonctionne la centrale inertielle de la station? (angles
d'inclinaisons)
13. Quelles sont les sensations lors d'une sortie extra-v?hiculaire?
14. Comment est affect?e l'oreille interne par le manque de pesanteur?
(tournis, mal de l'espace)
15. Peut-t-il y avoir des conflits entre vous? Si oui comment les g?rez-vous?
16. Si on vous propose de participer ? une mission vers Mars, le feriez-vous
et si oui, pourquoi?
17. Comment ressentez vous le fait d'?tre au milieu de l'espace?
Translated:
1. How do ISS passengers manage their sleep cycles?
2 How does the biological clock react to the disappearance of the day /
night mark?
3. How does the ISS succeed in being autonomous in electricity?
4. When you sweat after a sport effort, how do you shower?
5. Can you show us an object in weightlessness? (with the HAM-video active)
6. Is the micro gravity felt on a zero-G flight the same as the
weightlessness felt in the station?
7. Is the training sufficient to withstand the acceleration experienced
during takeoff of the rocket?
8. What is the advantage of weightlessness in your scientific experiments?
9. How is the ISS station and yourself affected by a solar flare?
10. How is the station protected from cosmic rays and solar winds?
11. How do you treat yourself if needed? (Illness, injury, etc.)
12. How does the inertial station operate? (Inclination angles)
13. What are the sensations during an extra-vehicular exit?
14. How is the inner ear affected by the lack of gravity? (dizzy spell, space
sickness)
15. Can there be conflicts between you all? If yes how do you manage them?
16. If you are offered to participate in a mission to Mars, would you do it
and if so, why?
17. How do you feel about being in the middle of space?
PLEASE CHECK THE FOLLOWING FOR MORE INFORMATION ON ARISS UPDATES:
Visit ARISS on Facebook. We can be found at Amateur Radio on the
International Space Station (ARISS).
To receive our Twitter updates, follow @xxxxxxxxxxxx
Next planned event(s):
1. Orel, Russia, direct via TBD
The ISS callsign is presently scheduled to be RS?ISS
The scheduled astronaut is Oleg Novitskiy
Contact is a go for Sat 2017-04-29 06:05 UTC
2. 14th Elementary School Katerini, Greece, direct via SX2ISS
The ISS callsign is presently scheduled to be RS?ISS
The scheduled astronaut is Fyodor Yurchikhin RN3FI
Contact is a go for: Sat 2017-04-29 12:02 UTC
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 Center for the Advancement of Science in
Space (CASIS) and National Aeronautics and Space Administration (NASA).
The primary goal of ARISS is to promote exploration of science, technology,
engineering, and mathematics (STEM) topics by organizing scheduled contacts
via amateur radio between crew members aboard the ISS and students in
classrooms or informal education venues. With the help of experienced
amateur radio volunteers, ISS crews speak directly with large audiences in a
variety of public forums. Before and during these radio contacts, students,
teachers, parents, and communities learn about space, space technologies,
and amateur radio. For more
information, see www.ariss.org, www.amsat.org, and www.arrl.org.
Thank you & 73,
David - AA4KN
---
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------------------------------
Message: 12
Date: Wed, 26 Apr 2017 17:51:55 -0400
From: Stewart Todd Morgan <morgan_st@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxxx Scott <scott23192@xxxxx.xxx>
Subject: [amsat-bb] ISS Packet Frequency?
Message-ID: <c2c40578-8531-da74-0e2f-15d0994798db@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Since I have been using both a Kenwood TH-D72A and other
less-than-optimal gear for packet and APRS over the last several years,
I decided to do a side-by-side packet decoding test this afternoon
during a 38 degree ISS pass at 2048 UTC. Both ground stations were
connected via a splitter to the same antenna (an old analog TV antenna
at 0 degree elevation and covering all 360 degrees azimuth). Both
ground stations also shared the same Pentium dual-core laptop computer
for software.
The less-than-optimal station included the following:
Icom IC-02AT HT
Unified Microsystems SCI-6 Sound Card Interface
AGWPE
UI-View32
The Kenwood TH-D72A was in packet mode and decoding through the latest
version of Yet Another APRS Client (YAAC).
Both stations were tested prior to the pass on terrestrial APRS with
almost identical decoding results. Tuning during the pass was done in 5
kHz increments on both stations (145.830 MHz, 145.825 MHz, 145.820
MHz). Reception during the ISS pass was less than stellar due to local
noise, but both stations decoded the same number of packets (13),
although they didn't always decode the exact same packets.
So even with the non-linear frequency shift noted previously by K4KDR
and myself, there does not seem to be any appreciable difference between
my ISS packet decoding ability now and any point in the past, even with
non-packet hardware. Perhaps a couple of other stations could share
their experience in this regard.
Todd
AL0I
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End of AMSAT-BB Digest, Vol 12, Issue 113
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