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CX2SA > SATDIG 18.08.11 19:41l 830 Lines 29953 Bytes #999 (0) @ WW
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Today's Topics:
1. a051 frequencies (Joe)
2. Re: Edusat and Kentucky (Trevor .)
3. Re: a051 frequencies (Andrew Glasbrenner)
4. W5KUB.com Huntsville Hamfest Webcast This Weekend (JoAnne Maenpaa)
5. Re: Official Word for 440 Antenna (Clint Bradford)
6. Re: Decoding wideband recordings (Patrick Strasser OE6PSE)
7. Re: ARISSat telemetry and Doppler tuning (Mark L. Hammond)
8. Re: Turn off AGC when receiving BPSK-1000 (Trevor .)
9. Re: Turn off AGC when receiving BPSK-1000 (Andre v Schaijk)
10. Re: a051 frequencies (John Geiger)
11. Re: ARISSat telemetry and Doppler tuning (n0jy@xxxxxxx.xxxx
12. AO-51 updates Re: Re: a051 frequencies (Mark L. Hammond)
13. Kursk files bug in telemetry software? (Roland Zurmely)
14. Re: Turn off AGC when receiving BPSK-1000 (JoAnne Maenpaa)
15. Re: Official Word for 440 Antenna (Dee)
----------------------------------------------------------------------
Message: 1
Date: Fri, 19 Aug 2011 00:24:45 +1000
From: "Joe" <gjmagee@xxxxxxxx.xxx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] a051 frequencies
Message-ID: <7C912ED0DC834AD7903D34DAA5B5668A@xxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
I will be trying to work ao-51 during the ILLW this weekend (20-21Aug). I
havent operated satellites since ao40, which is a little while ago...
I will be using the usual an arrow antenna and ft60r. I am having problems
finding the frequencies to tx and rx on. It seems that there have been some
changes made and different sites give me different frequencies I should be
using.
I think the Tx is 145.880. I think the Rx frequency is 435.500. Can anyone
please give me a definitive answer?
I have only just got the antenna and radio working as a unit in the last 24
hours.
I will be operating from Cape Schanck, just south of Melbourne Australia,
under the callsign VK3EMF.
Thanks
Joe VK3BKI
------------------------------
Message: 2
Date: Thu, 18 Aug 2011 15:38:27 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Edusat and Kentucky
Message-ID:
<1313678307.23472.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
The MSU news report on EduSat can be seen at
http://www.moreheadstate.edu/News/2011/August/MSU,_UR_launch_satellite_from_Ru
ssia/
73 Trevor M5AKA
--- On Wed, 17/8/11, charlie Cantrill <ki4rdt@xxxxx.xxx> wrote:
> Looks like Edusat will be partially
> controlled here from the U.S., right down the road in
> Kentucky.
> This is Dr. Ben Malphrus KJ4HJV of the Morehead Space
> Science program.Sounds like they are preparing to test a
> Femtosat deployment system. I should point out, this is
> where Bob Twiggs is currently teaching.?
> http://www.youtube.com/watch?v=ljnK2LVi9hw
>
> Charlie Cantrill
> KI4RDT
------------------------------
Message: 3
Date: Thu, 18 Aug 2011 09:49:01 -0500
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: Joe <gjmagee@xxxxxxxx.xxx.xx>
Cc: "<amsat-bb@xxxxx.xxx>" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: a051 frequencies
Message-ID: <755E39F1-1821-4474-9A5C-E387405633EA@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Currently and for the foreseeable future we are on 145.88 up and 435.150 down.
73, Drew KO4MA
AMSAT-NA VP Operations
Sent from my iPhone
On Aug 18, 2011, at 9:24 AM, "Joe" <gjmagee@xxxxxxxx.xxx.xx> wrote:
> I will be trying to work ao-51 during the ILLW this weekend (20-21Aug). I
havent operated satellites since ao40, which is a little while ago...
> I will be using the usual an arrow antenna and ft60r. I am having problems
finding the frequencies to tx and rx on. It seems that there have been some
changes made and different sites give me different frequencies I should be
using.
> I think the Tx is 145.880. I think the Rx frequency is 435.500. Can anyone
please give me a definitive answer?
> I have only just got the antenna and radio working as a unit in the last
24 hours.
> I will be operating from Cape Schanck, just south of Melbourne Australia,
under the callsign VK3EMF.
> Thanks
> Joe VK3BKI
> _______________________________________________
> 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: 4
Date: Thu, 18 Aug 2011 10:02:08 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] W5KUB.com Huntsville Hamfest Webcast This Weekend
Message-ID: <001501cc5db7$d24223d0$76c66b70$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hello Everyone,
This is one item that would be too late if we waited for the weekend ANS
news cycle.
Tom, W5KUB, famous for his Dayton Hamvention Webcasts, will be on-the-air
... well, on-the-internet with a webcast from the Huntsville Hamfest, live
August 20-21.
You can tune in at http://www.w5kub.com ... if you sign into the hamradio
chat you will be eligible to win the prizes that Tom and his crew
periodically draw.
Tom usually starts his webcasts with live transmissions during his drive to
the hamfest. If you tune in on Friday you'll get the action from the start.
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
Editor, AMSAT News Service
------------------------------
Message: 5
Date: Thu, 18 Aug 2011 08:04:32 -0700
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Official Word for 440 Antenna
Message-ID: <BE6D2235-9CAA-4782-8856-1CB72917AC14@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
>> ... What is the official AMSAT/ARISSat1 team finding on the ARISSat-1
70cm quarter-wave
receive antenna on the bottom of the satellite?
Not the "official" word by any means ... but the 440 whip was not there when
deployed. SO ... we are working with a 1.5" antenna instead of a 6.5" antenna.
But - All modes of ARISSat-1 are operational -
FM Downlink 145.950 - Operational
Linear Transponder U/V - Operational
CW Beacon 145.919 - Operational
VHF SSB BPSK-1000 - Operational
Clint, K6LCS
http://tinyurl.com/ARISSAT1-STATUS
------------------------------
Message: 6
Date: Thu, 18 Aug 2011 17:15:55 +0200
From: Patrick Strasser OE6PSE <oe6pse@xxxxxxxx.xxxx.xx>
To: Phil Karn <karn@xxxxxxxx.xxx>
Cc: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Decoding wideband recordings
Message-ID: <4E4D2CAB.7000600@xxxxxxxx.xxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1
Am 2011-08-10 00:54, schrieb Phil Karn:
> It's been suggested that I modify my ARISSat-1 BPSK-1000 telemetry
> demodulator/decoder to accept wideband quadrature (I & Q) recordings
> like those produced by most of the software defined radios out there.
>
> This is fundamentally not that hard, but first I need some information.
>
> How many people could actually use this?
I guess all people that use SDRs in the style of FCD, like SDR Widget,
or generally all DDC receivers that work with soundcard interfaces.
> What is the format of the
> recorded files? Is there a standard, or does each make of SDR produce
> its own?
Often the I and Q channel are recorded via Left and Right of a sound
interface, either built-in in the computer or via USB. FCD for example
is not more than a very powerful DDC chain, an USB audio device with
96kHz bandwidth and a USB HID interface to control all the settings,
like filters and gains. So for a recording you'd probaly end up in
whatever your recoding program produces, likely WAV, but any format with
16bit and 2 channels would do.
For decoding please be aware that I/Q via sound interfaces has a weak
spot at the centre frequency. The interfaces all have a high pass
characteristic below like 30Hz, which means the resulting spectrum has a
notch in the middle. You usually would not like to exactly tune the
center frequency to the frequency of your interest, but a little below
or above. You can see that notch for example at
http://www.oz9aec.net/index.php/funcube-dongle/423-funcube-dongle-on-the-air-t
ests-at-oz7sat
With all oscillators being not perfect this can probably be ignored, as
you wouldn't end up at the center frequency anyway.
For converting audio files I can recommend sox
http://sox.sourceforge.net
which is quite common in Linux distributions, but as cross platform tool
also available for Windows and Mac OS X. It's also available as library.
What I wonder is how good BPSK1000 survives speech encoders, like MP3.
Is there any experience already?
73
Patrick
--
Engineers motto: cheap, good, fast: choose any two
QTH: JN77rb http://sat.mur.at/
Patrick Strasser OE6PSE <oe6pse at wirklich priv at>
------------------------------
Message: 7
Date: Thu, 18 Aug 2011 11:28:23 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
To: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat telemetry and Doppler tuning
Message-ID:
<CAPRXzyreGgW2=gp1fz7YgjndNuN7bo4LyOXLBTcTSB1-9UKxuA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Ron,
Alan's points are spot on. That being said---I see something similar to
what you are seeing and "blame" the Keps :)
In the first few days, the manual freq. correction at TCA was over 1,000Hz
(seems like I had to shift it down, so -1,000) as compared to AOS and
LOS...which were "on frequency."
It has gotten much better over time. It was off -500Hz, and now it's under
-100Hz at TCA--so my thought is that the Kep elements are to blame, not a
drifting satellite transmitter, etc.
73!
Mark N8MH
On Thu, Aug 18, 2011 at 9:59 AM, Alan P. Biddle <APBIDDLE@xxxxxx.xxx> wrote:
> Ron,
>
> That behavior is common around TCA, Time of Closest Approach. At that time
> everything is changing rapidly, and slight errors in QTH position, system
> clock, and Keps can be magnified. I have seen a few hundred Hz shift at
> that time with new satellites whose Keps have not fully converged. The
> same
> if the system clock is off a bit. As you probably know, the basic Windows
> internet time calibration facility can be tweaked, but it is better to
> replace it with one such as Meinberg. Finally, always have the latest
> Keps.
> Updating with SATPC32 is easy and only takes a few seconds.
>
> It is unlikely to be a factor on 2 meters, with a fast computer, but you
> can
> try increasing the update calculations in SATPC32. Look on the CAT page.
> You will see tick boxes for 1X, 5X and 10X. Try 5X and see if it makes any
> difference. Note that this setting is not sticky.
>
> Actually, your results show you have just about everything nailed.
>
> 73s,
>
> Alan
> WA4SCA
>
>
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of Ronald G. Parsons
> Sent: Thursday, August 18, 2011 8:35 AM
> To: AMSAT-BB
> Subject: [amsat-bb] ARISSat telemetry and Doppler tuning
>
> Last evening, after having several days experience capturing ARISSat
> telemetry, I sat at my radio and watched carefully how SatPC32 and
> ARISSatTLM played together. I had settled on a tuning correction value of
> -540 HZ to get the CW signal to center around the CW tuning point as the
> Doppler correction was handled by SatPC32.
>
> The approach of the satellite seemed normal. but as the satellite passed
> by,
> I noticed the CW signal average "position" to be creeping upward, needing a
> reduction of the tuning correction by about 40 Hz to -500 Hz. This lasted
> for a couple minutes and then the CW signal started creeping down and I had
> to go back to my -540 Hz value.
>
> The first explanation I could think of is that the Doppler correction
> computed by SatPC32 from my position and the keps was in error. But of
> course, it could have been a change in my radio (unlikely as it had been on
> for hours) or a change in the frequency of the CW signal from the
> satellite.
>
> I'll keep watching this and wonder if others have noticed something
> similar.
>
> Ron W5RKN
> _______________________________________________
> 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
>
>
> _______________________________________________
> 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
>
--
Mark L. Hammond [N8MH]
------------------------------
Message: 8
Date: Thu, 18 Aug 2011 17:10:03 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000
Message-ID:
<1313683803.58493.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
--- On Thu, 18/8/11, Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx> wrote:
> published, the DOD Colony II 3u cubesats are 3 axis
> controlled and pointable to within a degree or something
> close to that.
UK company Clyde Space also doing work in this area, see
CubeSat High Resolution Camera
http://www.southgatearc.org/news/august2011/cubesat_high_resolution_camera.htm
73 Trevor M5AKA
------------------------------
Message: 9
Date: Thu, 18 Aug 2011 18:26:36 +0200
From: Andre v Schaijk <sats@xxxxxx.xxxxx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000
Message-ID: <4E4D3D3C.8060708@xxxxxx.xxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Op 18-8-2011 16:08, Andrew Glasbrenner schreef:
> > From what I have read that is published, the DOD Colony II 3u cubesats
are 3 axis controlled and pointable to within a degree or something close to
that. As Bob pointed out this isn't a big help for antenna pointing for
multiuser LEO sats, but when you read the power production the Colony II
sats have, you'll see the application in a HEO orbit. I believe a 3u in HEO
with this ability would be an affordable, usuable satellite for AMSAT to
launch if we could duplicate the Colony sats abilities.
>
> 73, Drew KO4MA/p at the corner of No and Where, Oklahoma
>
> Sent from my iPhone
>
> On Aug 18, 2011, at 7:47 AM, "Bob Bruninga"<bruninga@xxxx.xxx> wrote:
>
>> [Using attitude control]...
>>
>>> We could mount microwave antennas on a nadir-facing
>>> surface and provide consistent, predictable, strong,
>>> wideband signals to ground stations during a pass.
>> The problem with LEO satellites is that a nadir facing antenna does give
>> great gain directly overhead ground stations, but only for about the center
>> 2 minutes of only the one direct overhead pass a day. The problem with
>> facing antennas "down" on a LEO satellite is that 90% of the users are not
>> "under it", but to the side of it.
>>
>> For example, lets say that we put relatively high gain antennas facing down
>> giving about a 45 degree antenna pattern (say around 10 dB). Now looking
at
>> the total time that ARISSat is above 45 degrees, turns out to be about 3
>> minutes a day or less than 10% of all the time it is in view to any one
>> ground station.
>>
>> But as you say, it is a great advantage if the objective is to provide a 2
>> minute comm. window to anyone on the planet once a day, then such a design
>> does give as much as 16 dB or so advantage over an omni antenna on a
>> satellite.
>>
>> Anyway, just a thought.
>> Bob, WB4APR
>>
>>
Has anyone ever considered piggybacking on a geosat in a simular way the
rs11 to 13 did?
Sure you would need a very good lobbyist to get a ride with a multi
milion dollar broadcast sat and it would only see one continent but it
will give that continent 24/7 coverage, using 3 cm as downlink it would
give pleny bandwith for all kinds of experiments and if you can use the
host sat's powerbus there would also be no power restrictions.
73 Andre PE1RDW
------------------------------
Message: 10
Date: Thu, 18 Aug 2011 16:39:50 -0000
From: "John Geiger" <aa5jg@xxxxxxx.xxx>
To: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>,
"Amsat-Bb@xxxxx. Org" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: a051 frequencies
Message-ID: <607FCB6972CA4E1186968174559B7F45@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
How much power is AO51 currently running? It sure sounded good on the
2200UTC pass yesterday-much more solid receive here than I was getting for
AO27 or SO 50.
73s John AA5JG
----- Original Message -----
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
To: "Joe" <gjmagee@xxxxxxxx.xxx.xx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Thursday, August 18, 2011 2:49 PM
Subject: [amsat-bb] Re: a051 frequencies
> Currently and for the foreseeable future we are on 145.88 up and 435.150
> down.
>
> 73, Drew KO4MA
> AMSAT-NA VP Operations
>
> Sent from my iPhone
>
> On Aug 18, 2011, at 9:24 AM, "Joe" <gjmagee@xxxxxxxx.xxx.xx> wrote:
>
>> I will be trying to work ao-51 during the ILLW this weekend (20-21Aug). I
>> havent operated satellites since ao40, which is a little while ago...
>> I will be using the usual an arrow antenna and ft60r. I am having
>> problems finding the frequencies to tx and rx on. It seems that there
>> have been some changes made and different sites give me different
>> frequencies I should be using.
>> I think the Tx is 145.880. I think the Rx frequency is 435.500. Can
>> anyone please give me a definitive answer?
>> I have only just got the antenna and radio working as a unit in the last
>> 24 hours.
>> I will be operating from Cape Schanck, just south of Melbourne Australia,
>> under the callsign VK3EMF.
>> Thanks
>> Joe VK3BKI
>> _______________________________________________
>> 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
>
> _______________________________________________
> 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: 11
Date: Thu, 18 Aug 2011 12:11:05 -0500 (CDT)
From: n0jy@xxxxxxx.xxx
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat telemetry and Doppler tuning
Message-ID: <1345.170.49.217.220.1313687465.squirrel@xxxxxxx.xxx>
Content-Type: text/plain;charset=iso-8859-1
I found it quite noticeable last night too, I'm 150 miles or so North of
Ron's QTH.
In my experience, the marker on ARISSatTLM was moving down rapidly as the
satellite approached. After TCA (which was at about 68 degrees elevation,
I believe) it reversed back to "normal".
I was using the latest keps that I obtained from Space Track yesterday
afternoon. I did find my PC clock to be off (ahead) by just less than one
second, too.
For what it's worth. My thoughts given what you all have written, would
be that errors in all three (my location, my clock, and the keps) as Alan
mentioned, probably contributed to it. On a typical linear satellite pass
with a 2 meter downlink, I have never noticed it. I imagine that the
effect is amplified in a perceptive sense, by sitting and watching the
signal on a graph with pretty good resolution and not being distracted by
copying the CW or working a voice QSO.
73,
Jerry
N0JY
> Ron,
>
> Alan's points are spot on. That being said---I see something similar to
> what you are seeing and "blame" the Keps :)
>
> In the first few days, the manual freq. correction at TCA was over 1,000Hz
> (seems like I had to shift it down, so -1,000) as compared to AOS and
> LOS...which were "on frequency."
>
> It has gotten much better over time. It was off -500Hz, and now it's
> under
> -100Hz at TCA--so my thought is that the Kep elements are to blame, not a
> drifting satellite transmitter, etc.
>
> 73!
>
> Mark N8MH
>
------------------------------
Message: 12
Date: Thu, 18 Aug 2011 13:14:10 -0400
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
To: John Geiger <aa5jg@xxxxxxx.xxx>
Cc: "Amsat-Bb@xxxxx. Org" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] AO-51 updates Re: Re: a051 frequencies
Message-ID:
<CAPRXzyp6Kn7oXDGAEvOToRkJ9q_otGFLZKO=tYxxe4tXEE2Luw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi John,
Just yesterday I was trying to find time to type out a few AO-51 updates;
this will be brief, but hopefully informative to those on the list.
AO-51 is currently transmitting on 435.150 FM (LHCP) and using a 145.880 FM
uplink. We expect the keep this configuration "until futher notice." The
power level is just under 1 watt (about 980 mW). The last restart of the
satellite was something like 18 days ago!! This stretch of uninterrupted
service has been great, and really just "good luck."
Because of the failure of one cell of the six-cell battery, the bird remains
in "limp mode." By that I mean we are limited to simple commanding and
configurations, because a software upload/execution has proven impossible
due to the lower voltages resulting from the one dead cell. At least we can
set power levels manually, change uplinks/downlinks, etc. But there is no
telemetry collection/storage, no BBS, etc.
There is a second cell in the battery that looks "sick." We have no idea if
it will be the next cell to go (probable though), nor what the result will
be (if we lose another cell, "limp mode" probably will no longer be an
option, and the mission might be considered over.). It might last a few
days, a few months, or who knows...a few years? (doubtful).
The current scenario of AO-51 is one reason we need to keep moving AMSAT and
satellite development/building/launching moving forward!! We have learned a
lot already with ARISSat-1, and FOX looks promising. AMSAT needs the support
of its users now more than ever...
A little speculation--recently we have been looked upon kindly by the
"battery shorting gods." It looks like AO-51's dead cell has failed
closed/shorted--which is good for this bird; and it looks like maybe
ARISSat-1's battery might be failing/have failed in an "open" fashion--which
is good for this bird!
73!
Mark N8MH
On Thu, Aug 18, 2011 at 12:39 PM, John Geiger <aa5jg@xxxxxxx.xxx> wrote:
> How much power is AO51 currently running? It sure sounded good on the
> 2200UTC pass yesterday-much more solid receive here than I was getting for
> AO27 or SO 50.
>
> 73s John AA5JG
>
> ----- Original Message ----- From: "Andrew Glasbrenner" <
> glasbrenner@xxxxxxxxxx.xxx>
> To: "Joe" <gjmagee@xxxxxxxx.xxx.xx>
> Cc: <amsat-bb@xxxxx.xxx>
> Sent: Thursday, August 18, 2011 2:49 PM
> Subject: [amsat-bb] Re: a051 frequencies
>
>
>
> Currently and for the foreseeable future we are on 145.88 up and 435.150
>> down.
>>
>> 73, Drew KO4MA
>> AMSAT-NA VP Operations
>>
>> Sent from my iPhone
>>
>> On Aug 18, 2011, at 9:24 AM, "Joe" <gjmagee@xxxxxxxx.xxx.xx> wrote:
>>
>> I will be trying to work ao-51 during the ILLW this weekend (20-21Aug). I
>>> havent operated satellites since ao40, which is a little while ago...
>>> I will be using the usual an arrow antenna and ft60r. I am having
>>> problems finding the frequencies to tx and rx on. It seems that there have
>>> been some changes made and different sites give me different frequencies I
>>> should be using.
>>> I think the Tx is 145.880. I think the Rx frequency is 435.500. Can
>>> anyone please give me a definitive answer?
>>> I have only just got the antenna and radio working as a unit in the last
>>> 24 hours.
>>> I will be operating from Cape Schanck, just south of Melbourne Australia,
>>> under the callsign VK3EMF.
>>> Thanks
>>> Joe VK3BKI
>>> ______________________________**_________________
>>> 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<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<http://amsat.org/mailman/listinfo
/amsat-bb>
>>
>
> ______________________________**_________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
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--
Mark L. Hammond [N8MH]
------------------------------
Message: 13
Date: Thu, 18 Aug 2011 10:24:47 -0700 (PDT)
From: Roland Zurmely <py4zbz@xxxxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Kursk files bug in telemetry software?
Message-ID:
<1313688287.89768.YahooMailNeo@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
It seems that there is a bug in telemetry software,
perhaps created by the MET reset on each orbit?
Each day, recorded files always have the same names:
KURSK-944.1? KURSK-944.2 and so on...
So I did the following:
Every day end, I'm renaming the folder Kursk as kursk1, kursk2,...
So I have a folder per day. Next day,
when the software is launched, it creates automaticaly
a new Kursk folder, that will contains the files from this day,
with the same names of past days, but in a new folder.
73 de Roland.
------------------------------
Message: 14
Date: Thu, 18 Aug 2011 13:03:08 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Turn off AGC when receiving BPSK-1000
Message-ID: <001a01cc5dd1$16aff4c0$440fde40$@xxx>
Content-Type: text/plain; charset="us-ascii"
Hello Andre,
> Has anyone ever considered piggybacking on a geosat in a simular
> way the rs11 to 13 did?
> Sure you would need a very good lobbyist to get a ride with a multi
> milion dollar broadcast sat and it would only see one continent but it
> will give that continent 24/7 coverage, using 3 cm as downlink it would
> give pleny bandwith for all kinds of experiments and if you can use the
> host sat's powerbus there would also be no power restrictions.
Yeah, we still have dreams! At various times it had been called AMSAT-Eagle,
Phase IV Lite, C-C Rider, and other things. You'll notice from the dates on
these papers how long we've had this dream of a millions dollar rideshare
with a millions dollar satellite ...
http://www.arrl.org/news/amsat-announces-plans-for-2008
http://home.comcast.net/~k9jkm/Education_AMSAT_Eagle.pdf
http://home.comcast.net/~k9jkm/CQVHF_Eagle_ACP_Emcomm.pdf
Microwave downlinks were initially proposed here ...
http://www.cnssys.com/files/amsat/cc_amsat.pdf
http://www.cnssys.com/files/amsat/cc-revisited.pdf
http://www.cnssys.com/files/amsat/SDX_and_Future_AMSAT_Missions.pdf
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
------------------------------
Message: 15
Date: Thu, 18 Aug 2011 14:34:39 -0400
From: Dee <morsesat@xxxxxxxxx.xxx>
To: "'Clint Bradford'" <clintbrad4d@xxxxxxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Official Word for 440 Antenna
Message-ID: <001001cc5dd5$7d918dd0$78b4a970$@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Clint,
I think you have only stated the facts. This question is about what
happened to the antenna? I, for one, am looking for the explanation
as he is.
Did it get broken? Did it get lost the many times it was unpacked?
Did it ever have one? Etc.?
We may never have the proverbial exact answer, however, if we populate
the next satellite as this one, what do we do to insure an antenna?
Presently , all is operational albeit at a degraded level.
******Also- to those looking for Certificates of reception--- I am
involved with the group trying to answer all the requests. If someone
sends a request and a day later says- "Oh, I was incorrect on the time
or my name spelling etc."-- The first request is honored and others
disregarded. Too many requests to keep tabs on and I'm sure once the
school year begins in the US, we will be inundated with the requests.
Be patient and we will get to all as soon as possible.
73,
Dee & Gang of Certificate issuers.
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx
On Behalf Of Clint Bradford
Sent: Thursday, August 18, 2011 11:05 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Official Word for 440 Antenna
>> ... What is the official AMSAT/ARISSat1 team finding on the
ARISSat-1 70cm quarter-wave
receive antenna on the bottom of the satellite?
Not the "official" word by any means ... but the 440 whip was not
there when deployed. SO ... we are working with a 1.5" antenna instead
of a 6.5" antenna.
But - All modes of ARISSat-1 are operational -
FM Downlink 145.950 - Operational
Linear Transponder U/V - Operational
CW Beacon 145.919 - Operational
VHF SSB BPSK-1000 - Operational
Clint, K6LCS
http://tinyurl.com/ARISSAT1-STATUS
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the
author.
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------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
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End of AMSAT-BB Digest, Vol 6, Issue 474
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