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CX2SA > SATDIG 25.07.11 19:39l 843 Lines 32295 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: Should I abandon full doppler correction?
(Patrick STODDARD (WD9EWK/VA7EWK))
2. Saturday (23 July) on the satellites...
(Patrick STODDARD (WD9EWK/VA7EWK))
3. ND9M/P: DM35 / DM36 (claryco@xxx.xxxx
4. Re: Should I abandon full doppler correction? (Michael Schulz)
5. Re: Should I abandon full doppler correction? (Michael Schulz)
6. Re: SatPC32 Band Change? (Erich Eichmann)
7. FUNcube Videos Released (Trevor .)
8. Re: Doppler Correction? (Michael Schulz)
9. Re: Doppler Correction? (John Becker)
10. Arissat-1: EVA 29 live stream coverage (Fabio Azzarello)
11. Re: Doppler Correction? (Eric Knaps, ON4HF)
12. Russians' ISS Schedule (Clint Bradford)
13. Russians' EVA29 (Clint Bradford)
14. Re: Should I abandon full doppler correction?
(Patrick STODDARD (WD9EWK/VA7EWK))
----------------------------------------------------------------------
Message: 1
Date: Sun, 24 Jul 2011 20:58:34 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Re: Should I abandon full doppler correction?
To: amsat-bb@xxxxx.xxx
Message-ID:
<CAN6TEUfqVTFNhY2Y70AgY+X9Z_SpMKyxyn+HtqAqfNbLfUtFHQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Tom!
> Should I abandon full doppler correction?
No!
If you have it at your station, great! Take advantage of it,
but remember that not everyone will have the same setup
as you.
> Another less black-and-white step is that if I hear a station
> moving to adjust my settings so I am not doing full doppler.
That's a great way to go. Then you are able to work anyone
from another station that is fully under computer control, to
those that may only have the computer controlling one of the
two frequencies, to those that are working without a computer
controlling the radios. I'm in the latter category when I operate
in the field, with either two FT-817NDs or one 817 and a
TH-F6A HT (using its all-mode receiver to hear the downlinks).
I've noticed that many (most?) who work FO-29 tend to leave
the uplink frequency fixed and allow the downlink to drift due
to Doppler. For the other two (AO-7, VO-52), it is more of a
mixed bag. Anything from full computer control of both
uplink and downlink to no computer control at all. If you have
your station fully computer controlled, you should be able to
set your software to stop controlling either - or both - of the
frequencies if you desire. Some of us who don't have the
computer running the radios are able to compensate for those
with the computers, and be prepared to adjust both frequencies
if necessary. Whatever it takes to make the QSO. :-)
When I eventually get a home station, I will almost certainly
have a computer controlling my radio or radios for satellite
work. When I operate in the field as I currently do, a computer
is another item that I have to ensure has power, be near the
radios so the computer cables reach each radio, and then deal
with being able to see the screen. Until then, I will keep working
the transponders with my very portable station and have fun at
the same time.
Hopefully we can hook up sometime on one of those birds,
Tom. 73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 2
Date: Sun, 24 Jul 2011 21:27:47 -0700 (PDT)
From: "Patrick STODDARD \(WD9EWK/VA7EWK\)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Saturday (23 July) on the satellites...
To: amsat-bb@xxxxx.xxx
Message-ID:
<1311568067.68954.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi!
Thanks for all the QSOs when I was out at the DM32xx/DM42ax grid
boundary south of Phoenix yesterday afternoon. Normally the Arizona
heat is a dry heat, but there was enough humidity mixed with the
104F/40C heat that I didn't stay out there the whole afternoon. I
worked two AO-27 passes, followed by one pass each on FO-29 and AO-51,
before heading back to Phoenix. Before and after that quick road trip,
I did some operating from my "home QTH", a Phoenix city park on the
DM33xp/DM43ap grid boundary. I will send out QSL cards from yesterday's
activity tomorrow morning. If there isn't an SASE in the envelope,
there's no need to send a card back to me. For a few, I have included
an SASE, as I would like to receive your QSL card in that case. I
uploaded yesterday's QSOs to LOTW last night, and have seen a few
QSLs out of those QSOs already.
Before I drove out to DM32xx/DM42ax, I tried AO-7 in mode A from
the city park in the morning. I had played around with this during
Field Day last month, and I was determined to complete a QSO this
time. I had no problems hearing the downlink using an FT-817ND
with a Buddipole portable dipole in an "L" configuration on its
tripod and 8-foot mast. I heard Leo W7JPI calling CQ. He was
very easy to hear, and I proceeded to line up on his frequency.
After a couple of minutes, we made a quick QSO. Thanks, Leo, for
pulling me out of the noise! I need to work on either more antenna
gain than what I have from my FT-817ND and Elk log periodic on the
2m uplink, or more transmitter power, so I can have a better signal
on the mode A transponder. Or just confine my attempts to higher
passes, as yesterday's pass was only up about 19 degrees from the
horizon.
During the AO-51 pass just after 2200 UTC yesterday afternoon out at
the DM32xx/DM42ax boundary, I worked KO6E for my 10,000th satellite
QSO as WD9EWK. Thanks, Merv, for the quick contact - even though I
wasn't in Utah, Nebraska, or any of the other places you were looking
for on the satellites.
With the exception of possibly a dozen or so of the QSOs, all have been
completed with portable equipment and not from a home/fixed station.
Except for a pair of QSOs on SO-35 in 2000 and one QSO on UO-14 in 2003,
all of my satellite QSOs have been made since December 2005, when I
first worked AO-51. Lots of hot summer afternoons (like yesterday),
some cold days, and some nights - all out trying to make QSOs, and
having fun. :-)
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 3
Date: Mon, 25 Jul 2011 00:35:20 -0400 (EDT)
From: claryco@xxx.xxx
Subject: [amsat-bb] ND9M/P: DM35 / DM36
To: amsat-bb@xxxxx.xxx
Message-ID: <8CE189B64E25523-84C-C222@xxxxxxxxxxxxx.xxxxxx.xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Cori and I will be on from DM36 (possibly the grid line with DM35) on AO27
tomorrow (Monday) at 25/2043Z (approx turn on at 2047Z). Later on, we'll
head south a bit and be on from DM34 and then green stamper DM33 after that.
I don't know what pass(es) that will be however, but I know that Patrick,
WD9EWK, has got those two pretty well covered anyway.
We're still running all Arizona counties on HF CW and SSB, which really puts
a dent in efficient grid ops, but we'll be turning toward the northeast in a
couple days. Then we'll head for the much-in-demand DM66 grid in NM shortly
after that.
Also, now that we're back in AZ, tracking via APRS (ND9M-7) is more reliable
again.
73,
Jim, ND9M / VQ9JC
Flagstaff, AZ / DM66
------------------------------
Message: 4
Date: Sun, 24 Jul 2011 17:33:56 -0500
From: Michael Schulz <mschulz@xxxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Should I abandon full doppler correction?
To: "Tom Schaefer, NY4I" <ny4i@xxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <4FA08DD6-F289-470B-85FD-7BCA11D40266@xxxxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252
Tom,
I tried full doppler control with HRD's sat tracking software and wasn't
really thrilled to say the least. I may again try
Macdoppler as it's so far the best sat program I've seen but my main shack
machine unfortunately is a Windows box
because HRD's logging software is more convenient than MacloggerDX with
regards to eQSL and LOTW.
The other reason I do it all manual (both doppler and rotor control) is that
I like to be in control :). If I would leave it all
to the computer and all I'd have to do would be press the PTT then where's
the fun in that? IMHO it's great building all
the computer control as a PoT but then when it works it becomes boring :).
I heard you loud and clear on FO-29 today.
73 Mike K5TRI
On Jul 24, 2011, at 4:17 PM, Tom Schaefer, NY4I wrote:
> Hi all,
>
> I just tried a nice pass on FO-29. I heard K9CIS on CW and W5BK from
Texas. In both cases, while I am using full doppler correction with my 9100
and MacDoppler, I suspect they are leaving the transmit frequency fixed as
they both changed frequency. K9CIS on CW was quite extreme in the Doppler
shift. I know that this is a by-product of me using full doppler to listen
to stations that are not, but it seems that the majority of the stations I
hear are NOT using flu doppler. I have asked this question before, but it
seems to be happening more frequently.
>
> Should I abandon full doppler correction? Another less black-and-white
step is that if I hear a station moving to adjust my settings so I am not
doing full doppler.
>
> Has anyone ever taken a survey to see how many satellite users actually
use full doppler. Am I assuming more guys use computers and anyone of the
multiple ways to do computer control that have ben available for years? Does
anyone ever talk about this in AMSAT circles? Sort of like the encouragement
one gives to people afraid of LOTW to try it? "Computers in the
shack?NEVER!" I exaggerate but it seems that way. Then again, being a
computer person and having computer capable rigs I realize I am skewed in my
expectations. I know there are guys working with old 271/471 pairs or even
the old FT726 out there. Great radios and a simple way to do it, but even
they have ways to do full doppler control and they have been out for 20 years.
>
> Thanks,
>
> Tom
> Tom Schaefer, NY4I
> ny4i@xxxx.xxx
> EL88pb
> Monitoring EchoLink node KJ4FEC-L 489389
> DSTAR Capable APRS: NY4I-15
>
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Sun, 24 Jul 2011 20:10:42 -0500
From: Michael Schulz <mschulz@xxxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Should I abandon full doppler correction?
To: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <5EE89600-1527-44F8-865E-93EFEBB847BB@xxxxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Maybe it's just the ID-10-T error I'm having, but I just tried Macdoppler on
the VO-52 pass and it didn't work so well.
By the time I have found my downlink via the software the pass is over. I
was much quicker doing it manually and
had a good contact with K8YSE.
So what's the secret? What am I missing? Either Macdoppler or HRD,
suggestions are welcome.
Thanks,
Michael K5TRI
On Jul 24, 2011, at 6:42 PM, Stephen E. Belter wrote:
> Tom,
>
> I operated that same pass of FO-29. I started with a nice conversation
with Mike, WA8EBM (Michigan), then moxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Alan P. Biddle
> Sent: Sunday, July 24, 2011 6:27 PM
> To: 'Tom Schaefer, NY4I'; 'Amsat BB'
> Subject: [amsat-bb] Re: Should I abandon full doppler correction?
>
> Tom,
>
> There was an article in the Journal a few issues back on why the various
manual techniques are only approximations, sometimes surprisingly bad ones.
> I think the author's call was WA4SCA. So it does get talked about. With
an accurate clock, and current Keps it is possible to work a full pass and
scarcely touch the dial. It definitely makes it easier to conduct a round
table. If the transponder uses either modes L and/or S, you really don't
have much choice. The change rate is just too fast for practical manual
running, though VE3NPC does an amazing job. Even FM, which is very
forgiving is a challenge for manual tuning at those frequencies.
>
> My default is for full Doppler correction. If the other station is using
it, fine. We can concentrate on communicating. If not, I switch off and do
it the traditional way. It does provide some gentle encouragement to try a
new method, and gives you an opportunity to spread the word. I am
embarrassed at how long I stuck with paper logs amid all this technology. I
experienced a lot of nostalgia when I transferred all my old satellite
contacts to electronic format, but I have never looked back.
>
> Hang in there. As time goes by, you will see more stations using it, as
they won't have to unlearn years of experience. Just remember that it is a
hobby, and there are many for whom tuning and pointing are an integral part
of satellite operations. Have fun!
>
> Alan
> WA4SCA
>
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Tom Schaefer, NY4I
> Sent: Sunday, July 24, 2011 4:17 PM
> To: Amsat BB
> Subject: [amsat-bb] Should I abandon full doppler correction?
>
> Hi all,
>
> I just tried a nice pass on FO-29. I heard K9CIS on CW and W5BK from Texas.
> In both cases, while I am using full doppler correction with my 9100 and
MacDoppler, I suspect they are leaving the transmit frequency fixed as they
both changed frequency. K9CIS on CW was quite extreme in the Doppler shift.
> I know that this is a by-product of me using full doppler to listen to
stations that are not, but it seems that the majority of the stations I hear
are NOT using flu doppler. I have asked this question before, but it seems
to be happening more frequently.
>
>
> Should I abandon full doppler correction? Another less black-and-white
step is that if I hear a station moving to adjust my settings so I am not
doing full doppler.
>
> Has anyone ever taken a survey to see how many satellite users actually
use full doppler. Am I assuming more guys use computers and anyone of the
multiple ways to do compxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Mon, 25 Jul 2011 08:14:44 +0200
From: "Erich Eichmann" <erich.eichmann@xxxxxxxx.xx>
Subject: [amsat-bb] Re: SatPC32 Band Change?
To: "Paul Delaney - K6HR" <paul.hamradio@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <87D631C178FE4ABEA3DED1E2F721D790@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hello Paul,
with the IC-821H the program switchs bands automatically as needed.
In menu "Radio Setup" check option "Satellite mode". Leave the other options
unchecked.
73s, Erich, DK1TB
----- Original Message -----
From: "Paul Delaney - K6HR" <paul.hamradio@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Monday, July 25, 2011 12:35 AM
Subject: [amsat-bb] SatPC32 Band Change?
>
> Hello Erik et al,
>
> I'm using SatPC32 with an ICOM 821H. Is it possible to have SatPC32 change
> the up/down band for each satellite? The way I have it working now, I have
> to manually swap bands.
>
> Paul Delaney
> paul.hamradio@xxxxxxx.xxx
> http://k6hr.dyndns.org:8080
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 7
Date: Mon, 25 Jul 2011 12:17:01 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
Subject: [amsat-bb] FUNcube Videos Released
To: amsat-bb@xxxxx.xxx
Message-ID:
<1311592621.29092.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
AMSAT-UK have released a number of video showing the Assembly, Integration
and Verification (AIV) testing of the FUNcube satellite at the Rutherford
Appleton Laboratories:
Wouter removes the stack from the Thermo Vac chamber after nearly 5 hot/cold
cycles over a period of two and a half days in the chamber. The GOOD news is
that the stack was still working after these tests!
http://vimeo.com/26798894
Graham and Wouter return to the lab with the stack after removal from the
Thermo Vac chamber. They both make comments on how the test have gone so far.
http://vimeo.com/26799097
Applying 'Space Glue' to the screws holding the side panels in place, ready
for Vibration Testing on July 25.
http://vimband and run into those who are staying put. Of course if you adjust
> your uplink so you stay put at the satellite, you have to adjust your
> receiver to hear yourself because of the doppler shift in the other
direction.
> Both uplink and downlink require doppler correction in this case.
>
> If you don't have a rig that can be computer controlled or if you are
> operating portable and can't readily incorporate a laptop into your
> setup for whatever reason, then by all means manually adjust the highest
> frequency since that is the one that changes three times faster than the
> lower frequency in a v/u satellite. You simply do the best you can.
>
> However, if you have a home rig that can be computer controlled, then by all
> means use a computer to adjust your doppler. Stay in one spot in the
> satellite's passband. You can make faster contacts since you only have
> to pick up the mic to talk or use the key to send cw. If you are working
> dx and the window is short, being on frequency and staying put will help
> put that distant grid in the log.
>
> The program does all the work but you must be sure that your keps
> are current AND your computer clock is accurate to the second. On a
> high pass when the satellite is overhead, the doppler changes very fast
> and even a few seconds of clock inaccuracy will have you not hearing
> yourself in a normal voice. At lower elevations the doppler is not as
> be an indication that you have your calibration set properly.
>
> Most of the birds stay on frequency, but I've noticed that AO-7 Mode B will
> be off by 1700Hz when it changes from Mode A to Mode B. Normally we would
> not observe this phenomenon but since lately we have had this mode change
while
> over North America we are able to experience it. Within a few minutes, the
> satellite is down to a 1200 Hz offset. I'm not sure what happens on the
next
> pass because it is out of my footprint. The next morning, however, the bird
> is back to my normal setting. This means the frequency drifts about 1700 Hz
> back down to it's steady state value. The other birds may have some slight
> drifting, probably due to spacecraft temperature but it is minimal, less
than
> a few hundred Hz. So when you are trying to make a contact on the first
> AO-7 pass in Mode B, be prepared to readjust your uplink calibration so
you can
> hear yourself. It may be as much as 1700Hz at the start.
>
> In my opinion, everyone that can control their radio for doppler should do
so.
> Doppler correction gives us the maximum usage out of our linear
transponders.
> Why go through the agony of fiddling with your radio when your computer can
> make your life so much easier. You will never have to apologize for not
being
> on frequency. If I wasn't able to have doppler control on my radio, I
wouldn't
> spend much time on the linear birds, unless of course there was a rare grid
> to be worked. <grin>
>
> 73,
> John K8YSE
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Mon, 25 Jul 2011 09:16:55 -0500
From: John Becker <w0jab@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Doppler Correction?
To: amsat-bb@xxxxx.xxx
Message-ID: <5.2.0.9.2.20110725091337.0174cb00@xxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Seems to me that every program that I have tried I had to
"fine tune" it just a bit. But once that "sweet spot" was found
never had to touch it again.
John, W0JAB
------------------------------
Message: 10
Date: Mon, 25 Jul 2011 16:26:34 +0200
From: Fabio Azzarello <iw8qku@xxxxx.xxx>
Subject: [amsat-bb] Arissat-1: EVA 29 live stream coverage
To: AMSAT-BB@xxxxx.xxx
Message-ID:
<CAG-zPHMOB3YVPzA8JL=j99x4HSd474J7fqk8cdRo4q3MeWuwWQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hello,
Nasa TV Schedule reports:
*August 3, Wednesday
10 a.m. - ISS Expedition 28 Russian Spacewalk Coverage (spacewalk
begins 10:30 a.m. EDT.)*
it seems that the deployment of ARISSat/KEDR will be one of the first
tasks of the ,
I totaly agree with you. I work with full doppler control (rx and tx)
from the moment that I started on the birds.
That way I can concentrate more on seeking new stations and logging them.
73,Eric.
Amateur Radio Station ON4HF
Eric Knaps
Satellite manager UBA
Tel. +32472985876 (mobile)
http://www.on4hf.be
Op 25/07/2011 4:00, John Papay schreef:
> The purpose of full doppler correction is to keep your signal in
> the exact same spot on the receiver in the satellite. It has a finite
> passband and if you don't correct your uplink, you move within that finite
> passband. Theoretically a single linear transponder can support many
> conversations but it will not support the maximum unless everyone stays
> put at the satellite receiver. Those who don't doppler correct slide
> within the
> passband and run into those who are staying put. Of course if you adjust
> your uplink so you stay put at the satellite, you have to adjust your
> receiver to hear yourself because of the doppler shift in the other
direction.
> Both uplink and downlink require doppler correction in this case.
>
> If you don't have a rig that can be computer controlled or if you are
> operating portable and can't readily incorporate a laptop into your
> setup for whatever reason, then by all means manually adjust the highest
> frequency since that is the one that changes three times faster than the
> lower frequency in a v/u satellite. You simply do the best you can.
>
> However, if you have a home rig that can be computer controlled, then by all
> means use a computer to adjust your doppler. Stay in one spot in the
> satellite's passband. You can make faster contacts since you only have
> to pick up the mic to talk or use the key to send cw. If you are working
> dx and the window is short, being on frequency and staying put will help
> put that distant grid in the log.
>
> The program does all the work but you must be sure that your keps
> are current AND your computer clock is accurate to the second. On a
> high pass when the satellite is overhead, the doppler changes very fast
> and even a few seconds of clock inaccuracy will have you not hearing
> yourself in a normal voice. At lower elevations the doppler is not as
> severe so a few seconds won't make much difference.
>
> Use the HO-68 beacon to test your doppler correction. Set your radio for
> CW with a 500 Hz or better bandwidth. Pick a high pass where the bird will
> get up over 45 degrees. Tune the beacon in at your AOS and then don't touch
> the dial. If the CW note stays constant over the entire pass, your system
> is operating perfectly. Make sure your program settings are such that there
> are frequent frequency updates. I have mine set at 1 second no matter what.
> Some older radios will not accept frequency changes while you are
> transmitting. In
> that case, make sure you only key down for short periods of time so the
> radio frequency can be updated.
>
> Of course you must adjust your uplink calibration on SatPC32 so that you
> hear yourself on the downlink. Hearing yourself in a normal voice will
> be an indication that you have your calibration set properly.
>
> Most of the birds stay on frequency, but I've noticed that AO-7 Mode B will
> be off by 1700Hz when it changes from Mode A to Mode B. Normally we would
> not observe this phenomenon but since lately we have had this mode change
while
> over North America we are able to experience it. Within a few minutes, the
> satellite is down to a 1200 Hz offset. I'm not sure what happens on the
next
> pass because it is out of my footprint. The next morning, however, the bird
> is back to my normal setting. This means the frequency drifts about 1700 Hz
> back down to it's steady state value. The other birds may have some slight
> drifting, probably due to spacecraft temperature but it is minimal, less
than
> a few hundred Hz. So when you are trying to make a contact on the first
> AO-7 pass in Mode B, be prepared to readjust your uplink calibration so
you can
> hear yourself. It may be as much as 1700Hz at the start.
>
> In my opinion, everyone that can control their radio for doppler should do
so.
> Doppler correction gives us the maximum usage out of our linear
transponders.
> Why go through the agony of fiddling with your radio when your computer can
> make your life so much easier. You will never have to apologize for not
being
> on frequency. If I wasn't able to have doppler control on my radio, I
wouldn't
> spend much time on the linear birds, unless of course there was a rare grid
> to be worked.<grin>
>
> 73,
> John K8YSE
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 12
Date: Mon, 25 Jul 2011 10:07:38 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] Russians' ISS Schedule
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <9DF17AF8-E837-4877-ABC9-FC1A669F5484@xxx.xxx>
Content-Type: text/plain; charset=windows-1252
>From the public info office of the Russian Federal Space Agency ...
July 27, Wednesday
...
Pre-EVA: space suit leak check, test of the suit?s communication and medical
links, test of the equipment located in Pirs and Zvezda transfer
compartment, charging battery for Kedr microsatellite
...
July 30, Saturday
...
Preparation and test initialization of the Kedr microsatellite
...
July 31, Sunday
...
Kedr switch-off
...
Clint Bradford, K6LCS
http://www.work-sat.com
------------------------------
Message: 13
Date: Mon, 25 Jul 2011 10:21:19 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] Russians' EVA29
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <F5216571-D7F9-4528-9AD8-C1DC0D2CE209@xxx.xxx>
Content-Type: text/plain; charset="windows-1252"
So far Roscosmos has published this regarding the upcoming EVA29 ... Expect
more info soon!
This one is "old news" - from July 4 ...
Russian EVA Planned for August ? Alexander Samokutiaev
-------------- next part --------------
July 4, 2011
Alexander Samokutiaev, flight engineer of the International Space Station?s
expedition 28, informed
about the planning for the upcoming Russian EVA in his blog in Roscosmos web.
According to Russian cosmonaut, the EVA is slated for August, pending the
launch of the shuttle
scheduled for July 8.
Alexander will work outside the ISS with his colleague Sergey Volkov. The
cosmonauts are to perform
several ISS RS refurbishing tasks, as well as to launch small satellite Kedr.
Russian cosmonauts onboard the International Space Station switched on small
spacecraft Kedr on
April 12, in order to commemorate the jubilee of Yury Gagarin?s mission.
Small spacecraft Kedr developed under the RadioSkaf experiment bears the
name adopted by Yu.A.
Gagarin call sign in his historical flight, namely Kedr. The satellite?s
signal will be transmitted at radio
amateur frequency of 145.95 MHz. Kedr has radio amateur call sign RS1S.
RadioSkaf is implemented in the framework of UNESCO?s student space
education program.
Kedr will transmit different signals, images, including the talks of famous
Russian scientist Kostantin
Tsiolkovsky, rocket Chief Designer Sergey Korolev conversation with the
first cosmonaut during his
108-min historical mission, and famous Gagarin?s ?Go!? (Poekhali!), of course.
>From Roscosmos today ...
ISS Cosmonauts Prepare for EVA
July 25, 2011
Russian cosmonauts Sergey Volkov and Alexander Samokutiaev on-board the
International Space
Station prepare for a space walk slated for August 3.
Today the cosmonauts will check EVA panels, prepare tools and replaceable
items of the space suits.
The objectives of the upcoming EVA include maintenance and scientific tasks,
as well as launch of the
Kedr microsatellite devoted to the 50th anniversary of Yury Gagarin?s space
mission.
This will be the first EVA for Samokutiaev, and the third for Volkov. The
space walk is to commence
at 18.30 MSK and to last about 6 hours.
Roscosmos PAO
Clint Bradford, K6LCS
------------------------------
Message: 14
Date: Mon, 25 Jul 2011 10:29:36 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Re: Should I abandon full doppler correction?
To: amsat-bb@xxxxx.xxx
Message-ID:
<CAN6TEUcBnEeeS_0+ek0ontNwvFsxFK9wD0+BaEpR6i8yu4Rd1Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Alan!
I wanted to make a couple of points regarding some of your comments
from your earlier post...
> There was an article in the Journal a few issues back on why the various
> manual techniques are only approximations, sometimes surprisingly bad ones.
> I think the author's call was WA4SCA.
Yes, that WA4SCA is a good guy, smart guy. ;-)
> ?So it does get talked about. With an
> accurate clock, and current Keps it is possible to work a full pass and
> scarcely touch the dial.
I think some forget that even with computer control, you *can* touch
the big tuning knob on your receiver to see what may be away from
the center of the 50 to 100 kHz passbands. If you don't want to
touch your radio(s), then use the software to tune your receiver
around the passband. Everyone can't work in the few kHz around
the center of the passbands and have multiple simultaneous QSOs.
It has been nice to see more SSB activity on the weekends. On the
past couple of Saturday mornings, I've heard SSB QSOs on VO-52
from around 145.900 MHz up to almost 145.920 MHz. Not as busy
as Field Day, but you won't be out there all alone - and still have
room for additional QSOs. FO-29 and AO-7 (mode B) have also
had more activity on recent passes I've worked.
> My default is for full Doppler correction. ?If the other station is using
> it, fine. ?We can concentrate on communicating. ?If not, I switch off and do
> it the traditional way.
You don't necessarily need a computer to concentrate on
communicating through the linear transponders. Computers are
very useful, but not mandatory. I encourage computer control for
those looking to try the SSB birds, especially with software like
SatPC32. It will take some time to get the software working
properly with your radio(s), so be prepared to work with your
radio/computer combination. Otherwise, it will take time to get
the hang of working them "old school", without the assistance of
a computer. It took me 6 to 8 months, including trying different
antennas and radios receiving the downlinks, before settling on
my current SSB satellite station configuration. Definitely not
"EasySats", like the FM birds are called, but not impossible to
work.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
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End of AMSAT-BB Digest, Vol 6, Issue 393
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