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CX2SA > SATDIG 21.04.17 15:07l 928 Lines 32426 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Upcoming ARISS Contact Schedule as of 2017-04-19 08:00 UTC
(AJ9N@xxx.xxxx
2. 2 Hamvention tickets available (Clayton Coleman)
3. Re: ISS Beaconator II (Brad Schumacher)
4. Grid Expedition in Guatemala (David Maciel (XE3DX))
5. Interesting article, space.com (Vince Fiscus, KB7ADL)
6. Re: 2 Hamvention tickets available (Clayton Coleman)
7. Help with 2-meter ISS packet performance? (Scott)
8. AO-73/FUNcube Mode switch (Jim Heck G3WGM)
9. Re: Help with 2-meter ISS packet performance? (Scott)
10. Re: Hard times for satellite radio buyers? (Robert McGwier)
11. Re: Satellite SDR: Seeing IS NOT Hearing (Robert McGwier)
----------------------------------------------------------------------
Message: 1
Date: Thu, 20 Apr 2017 04:44:46 -0400
From: AJ9N@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2017-04-19
08:00 UTC
Message-ID: <1dbbe3.46dbe1e6.4629cefe@xxx.xxx>
Content-Type: text/plain; charset="ISO-8859-1"
Upcoming ARISS Contact Schedule as of 2017-04-19 08:00 UTC
Quick list of scheduled contacts and events:
Brook Haven School, Sebastopol, CA, direct via W6SRJ
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Thomas Pesquet KG5FYG
Contact is a go for: Wed 2017-04-19 18:40:43 UTC 82 deg
Lyc?e H?l?ne Boucher, Thionville, France, direct via F8KGY
The ISS callsign is presently scheduled to be FX?ISS
The scheduled astronaut is Thomas Pesquet KG5FYG
Contact is a go for: Thu 2017-04-27 08:52:17 UTC 83 deg (***)
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 (***)
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 12:02:10 UTC 69 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.
****************************************************************************
***
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.
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
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:
Satoshi 7M3TJZ with 123
Gaston ON4WF with 123
Francesco IK?WGF with 119
****************************************************************************
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 8601 date and
time format YYYY-MM-DD HH:MM:SS
The complete schedule page has been updated as of 2017-04-19 08:00 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
http://www.amsat.org/amsat/ariss/news/arissnews.txt
Total number of ARISS ISS to earth school events is 1130.
Each school counts as 1 event.
Total number of ARISS ISS to earth school contacts is 1091.
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 2017-04-15 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. 49 on orbit
Shane Kimbrough KE5HOD
Andrei Borisenko
Sergey Ryzhikov
Exp. 50 on orbit
Peggy Whitson
Thomas Pesquet KG5FYG
Oleg Novitskiy
****************************************************************************
73,
Charlie Sufana AJ9N
One of the ARISS operation team mentors
------------------------------
Message: 2
Date: Thu, 20 Apr 2017 08:58:41 -0500
From: Clayton Coleman <kayakfishtx@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] 2 Hamvention tickets available
Message-ID:
<CAPovOwf6reU2Xoce0D2uM4G90qx7hnnrvPK40LtKBBxDcE+vDg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I purchased two Hamvention tickets at $22 each, $44 total, online but
I will not be able to attend.
I will sell both shipped via USPS Priority mail for $34. Payment via
PayPal only.
73
Clayton
W5PFG
------------------------------
Message: 3
Date: Thu, 20 Apr 2017 07:02:49 -0700
From: Brad Schumacher <brad.schumacher66@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] ISS Beaconator II
Message-ID: <008001d2b9de$cbf89570$63e9c050$@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi Chris,
I saw your post on the AMSAT BB made me think of you.
How are you? All is well I hope? Still with DirecTV?
We are very busy with work - I've been building new master control services
and we are doing a lot of international expansion. The new facility is
finally making some progress.
I changed my call sign last year to W5SAT (get it SAT, satellite).
I just picked up an IC-7300 - nice little rig actually. Also I have been
interested in 6 meters - meteor scatter lately but also have the e-skip
season coming up. Been branching out a bit from doing mostly satellite
operations.
Ok, talk to you later if you are sitting around bored give me a call and
catch up.
Thanks,
Brad Schumacher
307-631-6436
------------------------------
Message: 4
Date: Thu, 20 Apr 2017 09:44:47 -0500
From: "David Maciel (XE3DX)" <david.xe3dx@xxxxx.xxx>
To: Grupo Amsat BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Grid Expedition in Guatemala
Message-ID:
<CA+3j0OMHCJvKwZKjMvu1DbdR6pQL2oR1tucTo8Gcg_a97OGOMg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
>From 24-27 April. I will make a trip to Guatemala, I will work grids EK43,
EK45, EK54, EK55 and EK56. I will work with the following calls.
TG4/XE3DX EK43
TG5/XE3DX EK45
TG6/XE3DX EK54
TG7/XE3DX EK55
TG7/XE3DX EK56
I want to make a special thank you to the Amateur Radio Club of Guatemala
for all the help, acronyms in Spanish (CRAG).
To its board of directors TG9AFX Christian Flores President, TG9AAJ Jorge
Abed Secretary. TG9AMD Dani Ardon Treasurer. TG9AOR Jose Roberto Ruiz Vocal.
To this day, I can not be sure if I will receive the LoTW certificate from
ARRL, report later for QSL Card exchange ....
David Maciel XE3DX
*http://www.qsl.net/xe3dx/ <http://www.qsl.net/xe3dx/>*
*david.xe3dx@xxxxx.xxx <david.xe3dx@xxxxx.xxx>*
------------------------------
Message: 5
Date: Thu, 20 Apr 2017 09:24:24 -0600
From: "Vince Fiscus, KB7ADL" <vlfiscus@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Interesting article, space.com
Message-ID: <5.2.1.1.2.20170420092149.00c40a50@xxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Could Cubesats Trigger a Space Junk Apocalypse?
http://www.space.com/36506-cubesats-space-junk-apocalypse.html
Time to start building Heo's again... Hoping.
KB7ADL
------------------------------
Message: 6
Date: Thu, 20 Apr 2017 12:40:13 -0500
From: Clayton Coleman <kayakfishtx@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] 2 Hamvention tickets available
Message-ID:
<CAPovOwdLaLEB5aig8bkGa7op8NJKn1Ou1A9ASwC2f=d61kDG5w@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
These tickets are now sold. Thanks!
On Thu, Apr 20, 2017 at 8:58 AM, Clayton Coleman <kayakfishtx@xxxxx.xxx>
wrote:
> I purchased two Hamvention tickets at $22 each, $44 total, online but
> I will not be able to attend.
>
> I will sell both shipped via USPS Priority mail for $34. Payment via
> PayPal only.
>
> 73
> Clayton
> W5PFG
------------------------------
Message: 7
Date: Thu, 20 Apr 2017 15:08:38 -0400
From: "Scott" <scott23192@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Help with 2-meter ISS packet performance?
Message-ID: <DDB6CEB7A6E44F868E780E5AE927164E@xxxxxxx>
Content-Type: text/plain; charset="UTF-8"
Hello everyone.
While the ISS packet digipeater is off for the crew docking today, I thought
it might be a good time to see what I could learn from the group in regard
to the rather drastic reduction in performance (both ways - TX & RX) that
I've seen since the Space Station's digipeater moved back to 2-meters.
I noticed this from day-1 and might have even commented on it previously.
But now that some time has passed and a good number of you reading this have
had your own experiences with the ISS back on 2-meters, I had to bring it up
again.
I realize that is a complete apples/oranges situation... different radios &
antennas on BOTH ends, different band propagation, etc., etc. But here is
my dilemma...
While I have been enjoying the very positive reports from many of you, I
have also been in touch with some hams from various locations that, like me,
can't buy a connection. And unlike myself, these are experienced operators
who regularly could connect to the ISS on 70cm across perhaps half the width
of the U.S. Also, to the best of my knowledge, these same amateurs were
very successful on 2-meter packet to the ISS before the original radio failed.
So yes, I know this is like asking why two different cars drive differently,
but as I said my confusion is how and why others are seeing so much success.
One more stick on the fire is that my iGate is also basically deaf now,
even though I have put it on an appropriate 2m antenna and of course changed
the frequency settings. I was enjoying an exceptional number of iGate
relays to the website on 70cm, but next to zero on 2m.
(Please let me add that my 2-meter packet setup works very well to a local
digipeater or on terrestrial APRS. Also, my iGate hears extremely well if I
move it to 144.39)
Getting digipeated is fun, but frankly I would be happy to just HEAR the
thing again. So, I don?t really think it?s competition on the band & some
of us not being heard, but rather something more in the RF arena.
As always, observations and suggestions from everyone are appreciated!
-Scott, K4KDR
Montpelier, VA USA
------------------------------
Message: 8
Date: Thu, 20 Apr 2017 20:20:24 +0100
From: "Jim Heck G3WGM" <jimlist@xxxx.xxx>
To: "Jim Heck G3WGM" <jim@xxxxxx.xx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] AO-73/FUNcube Mode switch
Message-ID: <0F0D127DE63E474AB46F83A0C09384ED@xxxxxx>
Content-Type: text/plain; format=flowed; charset="UTF-8";
reply-type=response
Hi Folks,
This is to let you know that I have just switched AO-73/FUNcube into
amateur mode, with transponder activated 24/7.
Early this week due to ground station availability.
As per normal, we will switch back to autonomous mode on Sunday pm UTC.
73s Jim G3WGM and the FUNcube Team
++++++++++++++++++++++++++++++++++
FUNcube frequencies and other details
++++++++++++++++++++++++++++++++++
AO-73 FUNcube-1
The transponder is normally operational only when the satellite is in
eclipse, ie the solar panels are NOT being illuminated. During weekends
(from pm Fridays UTC to PM Sundays UTC) the transponder is operational 24/7.
When the transponder is switched off, the telemetry beacon is on full power,
when the transponder is on the beacon it is on low power. During holidays,
eg Christmas, New Year, Easter, etc, the transponder maybe activated for
extended periods. Watch AMSAT-BB for announcements which are usually made on
Friday evenings (UTC)
The nominal transponder frequencies are:
Uplink: 435.150 - 435.130 MHz LSB (Inverting)
Downlink: 145.950 - 145.970 MHz USB
Telemetry Tx: 145.935 MHz BPSK
(The passband may be up to 15kHz higher depending on on-board temps. Low
temperatures give higher freqs!)
FUNcube-2 aka FUNcube on UKube
The FUNcube-2 sub-system continues to operate autonomously and, almost
continuously, in amateur mode. The transponder is operational and the
telemetry downlink is functioning with about 70mW output. The FUNcube-1
Dashboard does not correctly display the telemetry but it does correctly
decode the data and uploads it to the FUNcube Data Warehouse from where it
can be examined. Most of the real time data channels are operational and
these include battery voltages, temperatures and ADCS data coming via the
main On Board Computer (OBC).
The transponder is interrupted for a few seconds every 2 minutes when the
other transmitter sends its CW beacon and, occasionally, for a few seconds
when the main OBC reboots (approx seven times each orbit).
The nominal transponder frequencies are:
Uplink: 435.080 - 435.060 MHz LSB (Inverting)
Downlink: 145.930 - 145.950 MHz USB
Telemetry Tx: 145.915 MHz BPSK
(The passband may be up to 10kHz higher depending on on-board temps. Low
temperatures give higher freqs!)
EO79 FUNcube-3
Due to power budget constraints the transponder cannot be operational 24/7
and an orbit specific schedule has been developed. The transponder will
commence operation 27 minutes after the spacecraft enters sunlight and will
stay on for a period of 25 minutes. This schedule may be modified in future
months as a result of experience.
The nominal transponder frequencies are:
Uplink: 435.0723-435.0473 MHz LSB (Inverting)
Downlink: 145.946-145.971 MHz USB
Further detailed info on EO79 transponder frequencies is at:
https://amsat-uk.org/2016/11/10/eo79-funcube-3-transponder-commences-regular-o
peration/EO88
Nayif-1 FUNcube-5EO88 is presently operating in autonomous mode. The
transponder isoperational when the satellite is in eclipse, ie the solar
panels are NOTbeing illuminated.When the transponder is switched off, the
telemetry beacon is on full power,when the transponder is on the beacon it
is on low power.The transponder frequencies are:Uplink: 435.045 ? 435.015
MHz LSB (inverting)Downlink: 145.960-145.990 MHz USBTelemetry Tx:
145.940MHzAll FUNcube transponders are sponsored by AMSAT-UK and AMSAT-NL.
We are verygrateful for the assistance given by Innovative Solution In Space
Bv, TheNetherlands.
_______________________________________________
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: 9
Date: Thu, 20 Apr 2017 22:40:54 -0400
From: "Scott" <scott23192@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Help with 2-meter ISS packet performance?
Message-ID: <2476BE37F99E4A5093707DD5AEB34A2C@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="UTF-8";
reply-type=original
I?ve gotten a number of excellent replies to my question, but since they
were all off-list, I thought I would post a short summary in case anyone
else was interested.
One reply that taught me a lot referenced the situation that has already
been discussed regarding the very large volume of traffic being directed
towards the ISS since it returned to 145.825. As explained in the note, if
a digipeater is flooded with transmissions to the point that many (most?)
cannot be decoded, then naturally it has nothing to re-transmit back over
the air.
That is a very valid explanation for why I might not be HEARD, nor receive
very much on the downlink. And my iGate certainly can?t forward much to the
website if successful digipeats are way down.
While that might explain the situation over the Eastern US, I got a ?same
situation here? from Australia. So, I have to continue wondering if it?s
more than just congestion.
Another ham that is seeing closer to normal performance is operating at
higher power than many of us. So, that is another vote in the direction of
a ?too busy? receiver on the ISS with only a few contacts getting through.
Time will tell; I just wanted to share those informative off-list comments.
Many thanks to all who replied.
-Scott
------------------------------------------------------------------------------
--
------------------------------------------------------------------------------
--
Scott wrote:
> Hello everyone.
>
> While the ISS packet digipeater is off for the crew docking today, I
> thought it might be a good time to see what I could learn from the group
> in regard to the rather drastic reduction in performance (both ways - TX &
> RX) that I've seen since the Space Station's digipeater moved back to
> 2-meters.
>
> I noticed this from day-1 and might have even commented on it previously.
> But now that some time has passed and a good number of you reading this
> have had your own experiences with the ISS back on 2-meters, I had to
> bring it up again.
>
> I realize that is a complete apples/oranges situation... different radios
> & antennas on BOTH ends, different band propagation, etc., etc. But here
> is my dilemma...
>
> While I have been enjoying the very positive reports from many of you, I
> have also been in touch with some hams from various locations that, like
> me, can't buy a connection. And unlike myself, these are experienced
> operators who regularly could connect to the ISS on 70cm across perhaps
> half the width of the U.S. Also, to the best of my knowledge, these same
> amateurs were very successful on 2-meter packet to the ISS before the
> original radio failed.
>
> So yes, I know this is like asking why two different cars drive
> differently, but as I said my confusion is how and why others are seeing
> so much success. One more stick on the fire is that my iGate is also
> basically deaf now, even though I have put it on an appropriate 2m antenna
> and of course changed the frequency settings. I was enjoying an
> exceptional number of iGate relays to the website on 70cm, but next to
> zero on 2m.
>
> (Please let me add that my 2-meter packet setup works very well to a local
> digipeater or on terrestrial APRS. Also, my iGate hears extremely well if
> I move it to 144.39)
>
> Getting digipeated is fun, but frankly I would be happy to just HEAR the
> thing again. So, I don?t really think it?s competition on the band & some
> of us not being heard, but rather something more in the RF arena.
>
> As always, observations and suggestions from everyone are appreciated!
>
> -Scott, K4KDR
> Montpelier, VA USA
------------------------------
Message: 10
Date: Fri, 21 Apr 2017 08:48:36 -0400
From: Robert McGwier <rwmcgwier@xxxxx.xxx>
To: Jeff Davis <stuckbit@xxxxx.xxx>
Cc: amsat bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Hard times for satellite radio buyers?
Message-ID:
<CA+K5gzd3+=6OAXL6n6pcTDfpTNzNHMTUpJHxFwLssxHVGM0wsA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
This is the correct state of play in my opinion.
RFIC's are making every band from 50 MHz - 6 GHz commodity priced and
capable of supporting narrow band analog modes through 25 MHz wide digital
waveforms. This is the future because people want more for the less money.
Bob
On Sun, Mar 19, 2017 at 7:53 PM, Jeff Davis <stuckbit@xxxxx.xxx> wrote:
> It's problematic now to be sure. You buy old or you buy the THD-72 from
> Kenwood.
>
> But the "big three" are going to be ignored in the end. They don't support
> us now and the future will be twenty dollar modules from Amazon plugged
> together with a Raspberry Pi to give us the sort of functionality we need
> to work future payloads.
>
> Perhaps they understand that and have written this facet of the hobby off
> entirely?
>
> 73, Jeff KE9V
>
> On Sun, Mar 19, 2017 at 6:22 PM, Mike Sprenger <mikesprenger@xxxxx.xxx>
> wrote:
>
> > Hi Ken,
> >
> > Welcome, and glad you've found fascination with the Amateur Satellites
> >
> > Theres always the opportunity to acquire gear from a fellow satellite
> > enthusiast which you can inquire with folks here on the BB (I've got no
> > surplus gear right now)
> >
> > Check out how many all mode rigs are available if you recognize them,
> > they're often inexpensive if you find them on a hamfest table:
> >
> >
> > http://www.rigpix.com/index.shtml
> >
> >
> > There's lots of fun to be had on the satellites, I look forward to
> hearing
> > you on the air !
> >
> > (BTW, even the most modern gear by any definition can only make "Ancient
> > SSB" sound so good)
> >
> > Mike
> > W4UOO
> >
> > On Sun, Mar 19, 2017 at 11:51 AM, Bill Booth <ve3nxk@xxxxx.xxx> wrote:
> >
> > > On 2017-03-19 1:53 AM, Ken M wrote:
> > >
> > >> Thanks for indulging my shopping frustrations, and my inexperience,
> but
> > >> I have to think there are others new to the hobby that are having
> > >> similar thoughts. Do Amsat members see this as a problem?
> > >>
> > >
> > > Well Ken I am of the same thinking but a bit different. I have an old
> > 970
> > > and it works great for the birds, but like to do some EME as well at
> > 23cm.
> > > The field is like you say do it all or nothing. The 9100 is nice but
> has
> > > HF in it. and looks real small sitting next to my 7700 HF rig.
> > >
> > > I bet the next rigs will be SDR driven and the size of your
> phone........
> > >
> > >
> > > --
> > > 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.
> > >
> > > _______________________________________________
> > > 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
> > >
> >
> >
> >
> > --
> > Thanks,
> > Mike Sprenger
> > (37.9167N 81.1244W is the Summit)
> > _______________________________________________
> > 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
>
--
Bob McGwier
Founder, Federated Wireless, Inc
Founder and Technical Advisor, HawkEye 360, Inc
Research Professor Virginia Tech
Chief Scientist: The Ted and Karyn Hume Center for National Security and
Technology
Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY
Faculty Advisor Virginia Tech Amateur Radio Assn. (K4KDJ)
Director of AMSAT and member of PVRC, TAPR, and life member of ARRL and
AMSAT
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Message: 11
Date: Fri, 21 Apr 2017 08:51:04 -0400
From: Robert McGwier <rwmcgwier@xxxxx.xxx>
To: Jim Wilson <jim@xxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Satellite SDR: Seeing IS NOT Hearing
Message-ID:
<CA+K5gzcegXOM4m2D11KnMAKRK9ACgqf5iiyXcc3Yz-UWtVYshg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Not to mention inconsistent with good operating practice which given the
guidance of the FCC is tantamount to a regulation.
On Sat, Mar 25, 2017 at 3:20 PM, Jim Wilson <jim@xxxx.xxx> wrote:
> Whether tuning blind or with full SDR vision, transmitting without
> listening to assess the situation is massively counterproductive. As noted,
> it disrupts the on-going communication and isn?t any more likely to get a
> response. HF, VHF, or SATs it all works the same.
>
>
>
> Jim Wilson
> www.k5nd.blog
>
>
>
> > On Mar 25, 2017, at 2:05 PM, CEE <cee@xxxxxxxxxxxx.xxx> wrote:
> >
> > Clayton,
> >
> > Good topic!
> >
> > I would suggest that this behavior is not confined to SDR or satellite
> QSOs, but pervades all modes and bands of our hobby. I am guilty of this,
> but more due to excitement than intention. The good advice that is not
> confined just to ham radio, listen first, listen again, always applies, or
> as one local ham suggests, put mind in gear before the mouth. Not to sound
> like Miss Manners, but perhaps one of the unique aspects of our hobby is to
> always be considerate of the other operators. I always appreciate those
> ham's who mentor by example with kindness and absence of judgement.
> >
> > Thanks for mentioning!
> >
> > Chuck N7BFO
> >
> > On 3/25/2017 11:29 AM, Clayton Coleman wrote:
> >> I happen to be a fan of using Software Defined Radio (SDR) to receive
> >> amateur satellites. It is an inexpensive way to view all the signals
> >> appearing on a satellite's passband simultaneously. While I don't
> >> normally run SDR full time at my station, from time to time I use it
> >> to monitor activity on busy satellite passes because I can view and
> >> record all activity.
> >>
> >> As a result of more people using SDR on satellites, I have discovered
> >> an operating trait that warrants some discussion and evaluation.
> >>
> >> On more than one occasion, I have given a call to a very specific
> >> station, and instead of my intended target had another SDR-based
> >> station appear on frequency immediately saying "QRZ? QRZ?" rather than
> >> wait and listen to who is calling on the frequency. The SDR user saw a
> >> signal on their waterfall and clicked on it. They "pounced" on what
> >> they perceived to be another station looking to make contact which
> >> might not necessarily be the case.
> >>
> >> I've see the same thing happen a few times with pileups. There is an
> >> existing pileup in progress when the SDR station comes into the
> >> footprint. Rather than wait a short period to listen, they click on
> >> the new signal in their waterfall, and immediately proceed to "QRZ" on
> >> the frequency of the pileup, sometimes interrupting the flow of
> >> existing contacts.
> >>
> >> Just today I heard this scenario: Station 1 calls CQ. Station 2 went
> >> to answer. The SDR user clicked on the waterfall, heard only part of
> >> the callsign of Station 2, and proceeded to call Station 2, ignoring
> >> the possibility that Station 2 was attempting to QSO with someone
> >> else.
> >>
> >> It seems to me the visual nature of SDR waterfalls is causing a
> >> temporary lapse in judgement when it comes to a basic ham radio
> >> principle that we apply to satellite operating -- listen with our ears
> >> before transmitting.
> >>
> >> SDR is a great listening tool. With great power comes great
> responsibility.
> >>
> >> 73
> >> Clayton
> >> W5PFG
> >> _______________________________________________
> >> 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
>
--
Bob McGwier
Founder, Federated Wireless, Inc
Founder and Technical Advisor, HawkEye 360, Inc
Research Professor Virginia Tech
Chief Scientist: The Ted and Karyn Hume Center for National Security and
Technology
Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY
Faculty Advisor Virginia Tech Amateur Radio Assn. (K4KDJ)
Director of AMSAT and member of PVRC, TAPR, and life member of ARRL and
AMSAT
------------------------------
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 12, Issue 111
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