| |
CX2SA > SATDIG 23.04.14 21:06l 359 Lines 11932 Bytes #999 (0) @ WW
BID : AMSATBB9146
Read: GUEST
Subj: AMSAT-BB-digest V9 146
Path: IZ3LSV<IW0QNL<JH4XSY<JM1YTR<JE7YGF<7M3TJZ<CX2SA
Sent: 140423/1903Z @:CX2SA.SAL.URY.SA #:5477 [Salto] FBB7.00e $:AMSATBB9146
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: FUNcube telemetry performance? (Paul Stoetzer)
2. LituanicaSAT-1 FM transponder test (M5AKA)
3. W5PFG/P EM03 North Texas (Clayton Coleman)
4. Re: FUNcube telemetry performance? (Phil Karn)
5. Anyone hearing Kicksat? (andy thomas)
6. FUNcube, Educators (Clint Bradford)
7. Re: Anyone hearing Kicksat? (Dave Webb KB1PVH)
8. W1AW/2 NJ on SO-50 (Chris Del Plato KQ2RP)
9. Re: LituanicaSAT-1 FM transponder test (M5AKA)
----------------------------------------------------------------------
Message: 1
Date: Tue, 22 Apr 2014 18:40:22 -0400
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: Nick Pugh K5QXJ <quadpugh@xxxxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: FUNcube telemetry performance?
Message-ID:
<CABzOSOp098ewsdHq6f1+9wgAd6wDvRpC_Vhk9a=adtMCqf141w@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
When FUNcube was first launched, I went out to listen to it on the first
pass that I was home for (orbit #11 I believe). Since I live in an
apartment building, I have to go outside to hear most satellite passes. I
recorded the audio on my normal MP3 voice recorder and to my great
surprise, when I fed the audio into my computer, I was able to decode
several packets. I was not expecting it to be robust enough to survive 192
kbps MP3 compression and encoding.
73,
Paul, N8HM
On Mon, Apr 21, 2014 at 5:07 AM, Nick Pugh K5QXJ
<quadpugh@xxxxxxxxx.xxx>wrote:
> Hi Phil et All
> I can copy and decode the beacon at 30 mw EIRP using the M^2 yagi at very
> low SNR ~ 10 db SNR I do not see much fading
>
> nick
>
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
> Behalf Of Phil Karn
> Sent: Saturday, April 19, 2014 4:34 AM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] FUNcube telemetry performance?
>
> I haven't done anything with AO-73, but I understand it's transmitting the
> FEC format I originally designed for AO-40.
>
> How well is it working? What fraction of the frames are successfully
> decoded? How bad is the fading? I designed my format specifically for the
> spin fading on AO-40, and if the fading due to the tumbling of a cubesat is
> too slow my format won't be able to fix it.
>
> Phil
>
> _______________________________________________
> 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: 2
Date: Tue, 22 Apr 2014 23:52:41 +0100 (BST)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] LituanicaSAT-1 FM transponder test
Message-ID:
<1398207161.13650.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
See http://amsat-uk.org/2014/04/22/lituanicasat-1-fm-transponder-test/
----
Trevor M5AKA
AMSAT-UK
Website http://amsat-uk.org/
Facebook https://www.facebook.com/pages/AMSAT-UK/208113275898396
Twitter https://twitter.com/AMSAT_UK----
------------------------------
Message: 3
Date: Tue, 22 Apr 2014 21:09:58 -0500
From: Clayton Coleman <kayakfishtx@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] W5PFG/P EM03 North Texas
Message-ID:
<CAPovOwfyOvhMpPn=5Xsgip10WPJa7+pwresktnm46E1BzA4=rA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I will be staying the night in EM03 tomorrow and will operate a few
satellite passes for those who want this grid confirmed.
23-Mar SO-50 20:53 UTC
23-Mar VO-52 23:55 UTC
24-Mar FO-29 00:13 UTC
I will work this pass upon request only:
24-Mar FO-29 13:10 UTC
73
Clayton
W5PFG
------------------------------
Message: 4
Date: Tue, 22 Apr 2014 21:45:17 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
To: Paul Stoetzer <n8hm@xxxx.xxx>, Nick Pugh K5QXJ
<quadpugh@xxxxxxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: FUNcube telemetry performance?
Message-ID: <5357455D.1010202@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 04/22/2014 03:40 PM, Paul Stoetzer wrote:
> When FUNcube was first launched, I went out to listen to it on the first
> pass that I was home for (orbit #11 I believe). Since I live in an
> apartment building, I have to go outside to hear most satellite passes.
> I recorded the audio on my normal MP3 voice recorder and to my great
> surprise, when I fed the audio into my computer, I was able to decode
> several packets. I was not expecting it to be robust enough to survive
> 192 kbps MP3 compression and encoding.
I'm surprised too! But I had never tested it.
Phil
------------------------------
Message: 5
Date: Wed, 23 Apr 2014 08:12:25 +0100 (BST)
From: andy thomas <andythomasmail@xxxxx.xx.xx>
To: amsat <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Anyone hearing Kicksat?
Message-ID:
<1398237145.43851.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
I was unable to hear Kicksat on a high elevation pass in the UK las night. I
see DK3WN's blog reports similar issues. Has anyone heard Kicksat since the
weekend?
73 de andy G0SFJ
------------------------------
Message: 6
Date: Wed, 23 Apr 2014 01:19:45 -0700
From: Clint Bradford <clintbradford@xxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] FUNcube, Educators
Message-ID: <44785D59-2290-4C0A-886A-1DAF4E2A0E32@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
I have received a couple messages regarding the 45-second video of reception
of SO-73
with just a handheld radio and a meager antenna.
First, as written as captioning on that video, THAT IS NOT THE OPTIMAL MANNER
TO WORK AO-73 BY ANY MEANS. This was merely an experiment that shows you that
you can expand your horizons with a very inexpensive DIY antenna and your
handheld
radio. Those with AM-receiving equipment and even better antennas are
downloading
telemetry from several birds, and decoding and/or uploading that information
to control
operators.
Second, the next time you read that working satellites with minimal
equipment is a waste
of time and effort ... refer the writer to the story of Geoff Perry.
And then step outside and listen to a satellite or two ...
Geoff Perry took a few students outside in 1966 to demonstrate the Doppler
phenomenon with antiquated equipment - and he discovered a Russian military
base
that the Russians refused to admit existed for another seventeen years ...
--------
In October 1966 the eyes of the world became focused briefly on Kettering
Grammar School.
This was due to the activities of the science teacher, Geoff Perry, who,
with the help of antiquated
equipment and a team of enthusiastic pupils, managed to unlock the secrets
of the Soviet Russian
space programme even before the Americans.
Extraordinarily, this was not the only time he achieved such a feat. From
the early 1960's, Perry
had realised that by studying the Doppler Effect - marked by a change in the
signal as the
spacecraft passed overhead - he could discover the orbit of the Soviet
Cosmos satellites.
Starved of equipment - at first he was obliged to use the computer at the
corset factory in Desborough - he relied on close monitoring and
improvisation (his receiver needed "a smart tap with the hand from time to
time"). His breakthrough came with the launch of Cosmos 112, in May 1966,
which alerted him to something strange about the Soviet space effort. The
satellite did not seem to have come from the usual site at Baikonur in
Khazakstan. The launch of Cosmos 129 in October of that year from the same
unknown site enabled him to pinpoint it.
The new site was identified as Plesetsk, south of Archangel. The USSR did
not admit to its existence for a further 17 years. That same year he enjoyed
another scoop when he became the first scientist to announce the launch of
an unmanned Russian Soyuz spacecraft.
Perry's life changed as the world's media descended upon him. His name was
often in the newspapers as he teased out one secret after another about the
Soviet space programme. He realised the significance of the varying signals
transmitted by satellites and was able to identify which were on short
missions and which were up for longer. He even managed to track the signals
monitoring the cosmonauts' vital functions from one of the first manned
Soyuz craft. He inspired a growing band of space trackers among his pupils
who named themselves the Kettering Satellite Group.
In the 1970's, he became space consultant to Independent Television News,
commenting on the Apollo moonshots and the Apollo-Soyuz link-up in 1975. He
retired from teaching in 1984, and died in 2000.
-Courtesy KSG, and others
/end/
------------------------------
Message: 7
Date: Wed, 23 Apr 2014 08:17:21 -0400
From: Dave Webb KB1PVH <kb1pvh@xxxxx.xxx>
To: andy thomas <andythomasmail@xxxxx.xx.xx>
Cc: AMSAT -BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Anyone hearing Kicksat?
Message-ID:
<CAEMY9FcOYR+tKMCJahjEkDL5tHXt0sjA+S6cesnNB_NiWYvkSQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Andy,
I heard it on a couple passes on Sunday. The last one was at 01:02 UTC with
a max of 29? elevation. I wasn't able to decode any of the 3 packets. I'm
also using the keps for object F, 2014-022F.
Dave-KB1PVH
Sent from my Verizon Wireless Droid RAZR
------------------------------
Message: 8
Date: Wed, 23 Apr 2014 12:38:59 -0400
From: Chris Del Plato KQ2RP <kq2rp.cw@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] W1AW/2 NJ on SO-50
Message-ID:
<CACZQ6i_B0Zce75J2A48hRJAe3T0O+Vny+b8Xp-ShbbiVLL=aCQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Not much activity last night. Worked a couple. I'll give it another go
tonight at 0347 (a nice 70 deg. pass) for those interested. And perhaps
again on Friday night 0307z (85 deg).
73,
Chris
KQ2RP
------------------------------
Message: 9
Date: Wed, 23 Apr 2014 19:10:46 +0100 (BST)
From: M5AKA <m5aka@xxxxx.xx.xx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: LituanicaSAT-1 FM transponder test
Message-ID:
<1398276646.28867.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Update issued on April 23, 1839 UT.
Dear radio amateur operators,
Thanks
for all of your reports from today's successful transponder test!
During 14:20 UTC pass over Lithuania FM transponder has switched off
automatically after mode transitioning telecommand has been sent to the
satellite. This was standard test procedure to verify correct operation
of the on board computer during operation of the transponder. Next test
is scheduled for Apr 24 from 13:30 UTC to 15:00 UTC. Again we will be
grateful to your reports, including FSK packet telemetry on 437.544 MHz.
Please respect other radio amateurs and obey transponder operating
techniques.
73,
LituanicaSAT-1 team
Geriausi link?jimai / Best Regards,
Laurynas M
----
On Tuesday, 22 April 2014, 23:52, M5AKA <m5aka@xxxxx.xx.xx> wrote:
See http://amsat-uk.org/2014/04/22/lituanicasat-1-fm-transponder-test/
----
Trevor M5AKA
AMSAT-UK
Website http://amsat-uk.org/
Facebook https://www.facebook.com/pages/AMSAT-UK/208113275898396
Twitter https://twitter.com/AMSAT_UK----
------------------------------
_______________________________________________
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 9, Issue 146
****************************************
Read previous mail | Read next mail
| |
