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CX2SA > SATDIG 13.02.11 22:03l 262 Lines 8241 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V6 96
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Sent: 110213/2002Z @:CX2SA.LAV.URY.SA #:52303 [Minas] FBB7.00e $:AMSATBB696
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: FW: Wanted: ARISSat-1 BPSK1000 recordings (Mark L. Hammond)
2. Re: ARISSat-1 test (Edward R. Cole)
3. April 12 Reference (Clint Bradford)
4. Some Question's? (Stuart Balanger)
----------------------------------------------------------------------
Message: 1
Date: Sun, 13 Feb 2011 10:05:52 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: FW: Wanted: ARISSat-1 BPSK1000 recordings
To: "Alan Cresswell" <alancresswell@xxxx.xx.xx>, amsat-bb
<amsat-bb@xxxxx.xxx>
Message-ID: <7T5t1g00756cfur05T64nE@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi Alan,
Thank you for sharing your experiences.
Perhaps your observation "c" can be explained by the version of Excel you
are using. I'm using MS Office 2010 and it sees all of the columns fine.
An earlier report from a tester suggest that some older versions of Excel
cannot handle all of the columns produced by the telemetry and the program.
"c When running the test file Excel complains that data has been lost from
the CSV file because the number of columns exceeded the 256 column limit.
(Excel opens OK and all 256 columns contain data)"
I suspect a newer version of Excel is required; maybe OpenOffice can handle
it?
73,
Mark N8MH
At 04:35 AM 2/13/2011 +0000, you wrote:
>
>
>Hi Douglas,
>
>
>
>I have some recordings but I am not sure they will be of much use.
>
>However I thought it might be useful to share my experiences with the
>telemetry.
>
>
>
>I monitored the audio downlink on the first two passes and the data downlink
>on three passes. I used the ARISSATtlm-0.47 software for decoding on the
>data passes.
>
>On the first pass I could not clearly see the CW signal on the tuning
>indicator so no decode of the CW or data. The next two pass I had good CW
>decode and could line up the CW signal OK but no decode. After the passes
>(naturally) I re-read the article in the AMSAT journal and realized the
>importance of the 48k, 16 bit sample rate. The article claims that the
>ARISSATtlm configures the sound card to these values but when I checked the
>sound card was still at my normal 44.1k sample rate. Perhaps the software
>sets it to 48k and then sets it back to its previous value but I suspect
>not.
>
>I re-sampled my recording at 48k but still no decode. I noticed also that
>the CW decode from the recording was not as good as the original so perhaps
>the recording was at fault.
>
>To test this re-sampling method I re-sampled the test wave file at 44.1k and
>confirmed that it would not decode. I then re-sampled this file at 48k and
>once again it would decode.
>
>(i.e. the re-sampling worked OK.) This again perhaps pointed to a problem
>with the quality of my recording.
>
>
>
>Some observations.
>
>a Make sure the sound card output is set to 48k/16bit.
>
>b I noticed that the live telemetry sounded quite different from the test
>wave file. The data signal was much more obvious.
>
>c When running the test file Excel complains that data has been lost from
>the CSV file because the number of columns exceeded the 256 column limit.
>(Excel opens OK and all 256 columns contain data)
>
>d I notice that when I use the 0.7 software to decode the test file, the
>software remains active until I close it. When I attempt to decode my
>recordings the software always closes itself when the file ends.
>
>
>
>73
>
>Alan
>
>ZL2BX
>
>
>
> _____
>
>From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
>Behalf Of Douglas Quagliana
>Sent: Saturday, 12 February 2011 23:59
>To: amsat
>Subject: [amsat-bb] Wanted: ARISSat-1 BPSK1000 recordings
>
>
>
>If anyone made a recording of ARISSat-1's BPSK1000 signal (either an SDR
>recording or just a regular recording), then I'd like to get a copy.
>Please email me if you made a recording of the BPSK1000 signal.
>73,
>Douglas KA2UPW/5
>
>
>_______________________________________________
>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
>
> _____
>
>No virus found in this message.
>Checked by AVG - www.avg.com
>Version: 10.0.1204 / Virus Database: 1435/3439 - Release Date: 02/12/11
>
>_______________________________________________
>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: 2
Date: Sun, 13 Feb 2011 08:22:40 -0900
From: "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat-1 test
To: G0MRF@xxx.xxxx amsat-bb@xxxxx.xxx
Message-ID: <201102131724.p1DHOvRs096756@xxxxx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
There was a posting that alluded activation on April 12 but I find
nothing on the Russian site about ARISSat-1. I suppose they could
connect it to the test antenna on the ISS like they just did.
A lot of questions about the battery condition waiting for a launch
in July. I would suppose there was a external power jack provided
for testing. Could that power ARRISSat-1 from the ISS power systems
for recharging/test transmissions? This is a question and not based
on any knowledge I have about what it has.
July launch gives me time to restore my tracking antenna systems
after being damaged by wind in Dec. I will probably get the antennas
remounted sooner, but I still have to T/S and repair the B5400 controller.
73, Ed - KL7UW
At 05:38 AM 2/13/2011, G0MRF@xxx.xxx wrote:
>
>I wonder if it will sit until July?
>
>After all the Russians KEDR name reflects the upcoming anniversary of Yuri
>Gagarin's flight into space. That was 50yrs ago on 12th April.
>
>So many questions....
>
>David
>
>
>
>In a message dated 13/02/2011 08:28:12 GMT Daylight Time,
>orbitjet@xxxxxxx.xxx writes:
>
>Interesting comments:
>
>"During the test, RSC-Energia decided to keep the transmitter on
>until Friday morning. "
>
>Hmmm curious about a few things but... what impact this "test" has had on
>battery life, considering the vehicle now "sits" until at least July...
>
>Robert G. Oler WB5MZO life member AMSAT/ARRL soon to be NAARS and
>5Nsomething
>
>
>
>_______________________________________________
>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
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
EME: 144-1.4kw*, 432-100w, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep dubususa@xxxxxxx.xxx
======================================
*temp not in service
------------------------------
Message: 3
Date: Sun, 13 Feb 2011 10:36:30 -0800
From: Clint Bradford <clintbradford@xxx.xxx>
Subject: [amsat-bb] April 12 Reference
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID: <08E846DF-20AF-4966-9B83-E49F5154F98A@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
Here is the "April 12" deployment reference on the Russian Federal Space
Agency's Web site ...
http://www.federalspace.ru/main.php?id=2&nid=11353
Clint
------------------------------
Message: 4
Date: Sun, 13 Feb 2011 14:49:02 -0500
From: Stuart Balanger <wa2bss@xxxxx.xxx>
Subject: [amsat-bb] Some Question's?
To: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTinqEaS9JkRA6i3JyeQmhmBsAGA7=45XvcY4NJyd@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
*Hi all,
2 auestions
1) was wondering what "LoWT" stands for?
2) Also, was wondering the Date & Place for this yr's"aMSAT weekend
Symposium"? Thanks,.(73,.Stu (WA2BSS)
*
------------------------------
_______________________________________________
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!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 96
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