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CX2SA > SATDIG 02.02.13 21:03l 605 Lines 17110 Bytes #999 (0) @ WW
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Sent: 130202/2001Z @:CX2SA.SAL.URY.SA #:3018 [Salto] FBB7.00e $:AMSATBB835
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: CubeSats on Arirang TV (Wouter Weggelaar)
2. Re: CubeSats on Arirang TV (Trevor .)
3. AMSAT-US Web Site (Clint Bradford)
4. Re: AMSAT-US Web Site (Joe Fitzgerald)
5. Re: AMSAT-US Web Site (Clint Bradford)
6. ISS ShadowBeacon UP (Mineo Wakita)
7. OSCAR-11 Annual Report 2012 (Clive Wallis)
8. PCSAT batteries! (Robert Bruninga)
----------------------------------------------------------------------
Message: 1
Date: Fri, 1 Feb 2013 22:20:50 +0100
From: Wouter Weggelaar <wouterweg@xxxxx.xxx>
To: g0mrf <g0mrf@xxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: CubeSats on Arirang TV
Message-ID:
<CAKXf1rEMOvavqwf8stSM=uecrZO7MnVNi5_9iHc3ZqE-Heo9Uw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I feel hounored that FUNcube made it to the Korean TV news, and that
my callsign is even readable. I did not know about this particular
shot, but knew the TV crew was around.
This is by the way the FUNcube EM (engineering model)
Wouter PA3WEG
On Fri, Feb 1, 2013 at 6:48 PM, g0mrf <g0mrf@xxx.xxx> wrote:
> You're good Graham.
>
> I had to freeze frame the video.....but then you can see the callsign
PA3WEG on the masking tape.
>
> 73
>
> David
>
>
>
> In a message dated 31/01/2013 GMT Standard Time,
g.shirville@xxxxxxxxxx.xxx writes:
> The more eagle-eyed amongst us have spotted that about 9 seconds into this
> video it includes shots of the FUNcube-1 engineering model stack, with a
> antenna deployment simulator attached to it, obviously taken recently but I
> have absolutely no idea how they came by it:)
>
> 73
>
> Graham
> G3VZV
>
> -----Original Message-----
> From: Trevor .
> Sent: Thursday, January 31, 2013 10:03 PM
> To: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] CubeSats on Arirang TV
>
> Korean TV station Arirang broadcast this English language news item about
> CubeSats:
>
> http://www.youtube.com/watch?v=sfZRDS6-D-o
>
> 73 Trevor M5AKA
> ----
>
>
> _______________________________________________
> 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
> _______________________________________________
> 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: Fri, 1 Feb 2013 21:45:52 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: Graham Shirville <g.shirville@xxxxxxxxxx.xxx>, amsat-bb@xxxxx.xxxx
g0mrf <g0mrf@xxx.xxx>
Subject: [amsat-bb] Re: CubeSats on Arirang TV
Message-ID:
<1359755152.83871.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
I'll put it on the AMSAT-UK site.
I take it we are talking about the attached picture which occurs 5 seconds
into the video ?
73 Trevor M5AKA
--- On Fri, 1/2/13, g0mrf <g0mrf@xxx.xxx> wrote:
From: g0mrf <g0mrf@xxx.xxx>
Subject: Re: [amsat-bb] Re: CubeSats on Arirang TV
To: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>, "Trevor ."
<m5aka@xxxxx.xx.xx>, amsat-bb@xxxxx.xxx
Date: Friday, 1 February, 2013, 17:48
You're good Graham.
?
I had to freeze frame the video.....but then you can see the callsign PA3WEG
on the masking tape.
?
73
?
David
?
?
?
In a message dated 31/01/2013 GMT Standard Time, g.shirville@xxxxxxxxxx.xxx
writes:
#yiv380802057 .yiv380802057aolmailheader
{font-size:8pt;color:black;font-family:Arial;}
#yiv380802057 a.yiv380802057aolmailheader:link
{color:blue;text-decoration:underline;font-weight:normal;}
#yiv380802057 a.yiv380802057aolmailheader:visited
{color:magenta;text-decoration:underline;font-weight:normal;}
#yiv380802057 a.yiv380802057aolmailheader:active
{color:blue;text-decoration:underline;font-weight:normal;}
#yiv380802057 a.yiv380802057aolmailheader:hover
{color:blue;text-decoration:underline;font-weight:normal;}
The more eagle-eyed amongst us have spotted that about 9 seconds into this
video it includes shots of the FUNcube-1 engineering model stack, with a
antenna deployment simulator attached to it, obviously taken recently but I
have absolutely no idea how they came by it:)
73
Graham
G3VZV
-----Original Message-----
From: Trevor .
Sent: Thursday, January 31, 2013 10:03 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] CubeSats on Arirang TV
Korean TV station Arirang broadcast this English language news item about
CubeSats:
http://www.youtube.com/watch?v=sfZRDS6-D-o
73 Trevor M5AKA
----
_______________________________________________
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: 3
Date: Fri, 01 Feb 2013 16:17:45 -0800
From: Clint Bradford <clintbradford@xxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] AMSAT-US Web Site
Message-ID: <1AF3E78F-1B05-4EFC-91CA-764DF5A99D52@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
I am working on a publishing deadline. Confirming that "AMSAT.org" will
continue to be the domain name for AMSAT-NA's official site - is that correct?
Clint K6LCS
Sent from my iPod touch.
------------------------------
Message: 4
Date: Fri, 01 Feb 2013 21:34:04 -0500
From: Joe Fitzgerald <jfitzgerald@xxxx.xxx.xxx>
To: Clint Bradford <clintbradford@xxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT-US Web Site
Message-ID: <510C7B1C.4060202@xxxx.xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 2/1/2013 7:17 PM, Clint Bradford wrote:
> I am working on a publishing deadline. Confirming that "AMSAT.org" will
continue to be the domain name for AMSAT-NA's official site - is that correct?
>
>
Clint,
Use of amsat.org will continue indefinitely. It is difficult to
imagine a scenario where we would want to change it.
-Joe KM1P
------------------------------
Message: 5
Date: Fri, 01 Feb 2013 18:37:34 -0800
From: Clint Bradford <clintbradford@xxx.xxx>
To: Joe Fitzgerald <jfitzgerald@xxxx.xxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: AMSAT-US Web Site
Message-ID: <42DAC9D4-3FFD-4C20-A311-EBD62A8B8364@xxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII
Joe, *I* know that, and *YOU* know that ...but I needed to ask because a
published book
and its "current info" for years to come is at stake ...
THANK YOU for your replt.
Clint
909-241-7666
On Feb 1, 2013, at 6:34 PM, Joe Fitzgerald wrote:
On 2/1/2013 7:17 PM, Clint Bradford wrote:
> I am working on a publishing deadline. Confirming that "AMSAT.org" will
continue to be the domain name for AMSAT-NA's official site - is that correct?
>
>
Clint,
Use of amsat.org will continue indefinitely. It is difficult to imagine a
scenario where we would want to change it.
-Joe KM1P
------------------------------
Message: 6
Date: Sat, 2 Feb 2013 22:20:34 +0900
From: "Mineo Wakita" <ei7m-wkt@xxxxxxxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ISS ShadowBeacon UP
Message-ID: <751DD9C033FE4F63AFE4E930A4DC87A9@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-2022-jp";
reply-type=original
http://www.ne.jp/asahi/hamradio/je9pel/isshado2.htm
JE9PEL, Mineo Wakita
------------------------------
Message: 7
Date: Sat, 02 Feb 2013 15:47:17 +0000
From: Clive Wallis <clive@xxxxx.xx.xx>
To: amsat <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] OSCAR-11 Annual Report 2012
Message-ID: <510D3505.2020500@xxxxx.xx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
OSCAR-11 ANNUAL REPORT 2012
This report covers the period from 01 January 2012 to 01
January 2013. During this time there have been no?
significant changes apart from the gradual drift of the?
on-board clock. The satellite has been transmitting on a?
regular cycle of 10.35 days on followed by 10.35 days off.
OSCAR-11 (AKA UoSAT-2 and UO-11) celebrated it's?
28th birthday in space on 01 March! It was designed, built?
and launched within a period of six months, using?
commercially available 'off the shelf' components (COTS).?
Once again, congratulations to Professor Sir Martin Sweeting?
G3YJO, his team at the University of Surrey and the groups?
of radio amateurs who also contributed to the project.?
Good copy has been obtained obtained from decoded telemetry?
frames and many reports have been posted on the DCARR?
general satellite status website,
The satellite continues to be subjected to eclipses during?
each orbit, resulting in weaker signals at those times.?
During the summer in the UK all passes were in sunlight,?
however the eclipses gradually returned during the autumn?
and now all evening passes are eclipsed and signals are?
significantly weaker than in the morning passes.
The on-board clock gained 85 seconds during the year, which?
is comparable with the 60 seconds gain per year when the?
satellite was launched. There is however a large accumulated?
error of 308.54204 days slow. This was caused mainly by the?
clock stopping during eclipses, when there was also an?
unknown drain on the power supply. The units of the least?
significant digit correspond approximately to seconds (0.86?
seconds actually).
At the present time, while OSCAR-11 is operating in a?
predictable way, please DO NOT send reports or files by?
e-mail. However, could all listeners continue to enter their?
reports on the general satellite status website. This is a?
very convenient and easy to use facility, which shows the?
current status of all the amateur satellites, and is of use?
to everyone. Reports around the expected times of switch-on?
and switch-off are of special interest, especially for times?
13:00 to 18:00 and 22:00 to 08:00 UTC, to when the satellite?
is out-of-range in the UK . The URL is?
http://oscar.dcarr.org/index.php
The VHF beacon frequency is 145.826 MHz. AFSK FM ASCII?
Telemetry. The satellite is operating in the default mode,?
controlled by the watchdog timer, with a cycle time of 20.7?
days. 10.35 days on followed by 10.35 days off.
An extended version of this report is available on my
website, and new listeners to OSCAR-11 should read this for?
further information. The URL is www.g3cwv.co.uk/oscar11.htm?
. This page contains links to the report, a short audio clip?
to help you identify the satellite and a file of recent?
telemetry received. The website also contains an archive of?
news & telemetry data which is updated from time to time,?
and details about using a soundcard or hardware demodulators?
for data capture. There is also software for capturing data,?
and decoding ASCII telemetry.
The easiest way to check whether OSCAR-11 is operational is?
to look at the General Satellite Status website?
http://oscar.dcarr.org/index.php .
If you place this bulletin on a terrestrial packet network,
please use the bulletin identifier $BID:U2RPT158.CWV, to
prevent duplication.
73 Clive G3CWV xxxxx@xxxxx.xxx (please replace the x's by
g3cwv)
------------------------------
Message: 8
Date: Sat, 2 Feb 2013 11:14:30 -0500
From: Robert Bruninga <bruninga@xxxx.xxx>
To: APRS@xxxxxxxxxxx.xxx
Cc: aprssig@xxxx.xxxx amsat-bb@xxxxx.xxx
Subject: [amsat-bb] PCSAT batteries!
Message-ID: <8fc2502311b92b118cd59801847c4fa8@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
>,what kind of battery is install on this kind of satellite?
> how does it react in the cold space where it is?
We placed the batteries in the middle of the satellite. It is quite
immune to the +90C and -100C possible fluctuations on (unattached) solar
panels (if they were not attached to the sides of the satellite). Since
the solar panels are attached to the aluminum frame and the satellite
rotates at about 1 RPM, we don't see any temperature variations even on
the panels of more than about 10C (per orbit).
And then these 10C fluctuations on the sides only penetrate to about a +/-
1 degree variation at the batteries per orbit and per day. Though there
is a long term variation with the Sun/Orbit beta angle.
The average temperature of PCsat is around 10C, getting as low as 0C
during full eclipse seasons (High Beta angles) and as high as 40C for a
weak or so when it is in full sun. This cycle moves over a 2 month or so
cycle.
Right now, PCsat inside is a nice comfortable 25C.
Our problems with PCSAT (now 12 years old) is our own fatal flaw of
designing it with a reboot-after-fault-detection mode of turning on backup
transmitters and backup receivers to regain contact with the command
station. Now with 20/20 hindsight, that was dumb... especially if the
reason it faulted is due to low power!
We can get in and turn off the extra XMTRS and RCVRS any time we want
during high beta angles (maximum peak solar power available), but then
there is only 15 minutes left before it goes back into eclipse and dies
(not enough ttime to charge each orbit).
But then 2 or 3 times a year, it enters full sun periods when, if we can
get the command in, then we can send those commands to turn off all the
spares and they will hold... BUT this time of full sun, is also the time
of the worst sun angle (least average power), and so it is iffy if we can
get the command in.
See http://pcsat.aprs.org (raw packets at the bottom) and you will see
that today's attempt resulted in achieving 9 minutes of operation before
it died. See the telemetery serial numbers starting at 001 each time it
resets.
That occurred at 2013-02-02-14:29:24z
Hope that helps
Bob, Wb4aPR
-----Original Message-----
From: APRS@xxxxxxxxxxx.xxx [mailto:APRS@xxxxxxxxxxx.xxxx On Behalf Of
Gervais Fillion
Sent: Saturday, February 02, 2013 9:53 AM
To: aprs@xxxxxxxxxxx.xxx
Subject: RE: [APRS] QRT all PCSAT transmissions!
Hi Bob,what kind of battery is install on this kind of satellite?i wonder
how it react in the cold space where it is?Do you have any data that gave
the temperature upthere?i am just curious,here in the Eastern part of
Quebec we are used to have in the -20 celcius,,,,and battery are built for
that,,how it is in space??
73 Bob
Thanks for all the info you are tellng us.
Gervaisve2cknLe Bic,Quebec
www.michelebard.com4823.73N/06839.65W
To: APRS@xxxxxxxxxxx.xxx
From: wb4apr@xxxxx.xxx
Date: Sat, 2 Feb 2013 08:20:00 -0500
Subject: RE: [APRS] QRT all PCSAT transmissions!
> Question: PCSAT,does it transmit at 144.390 like other APRS
hardware ?
No and yes. It operates up and down on 145.825 like all other APRS
satellites.
But it also has a backup transmitter on 144.39 which we can use as a
national broadcast downlink.
Problem is, most people cannot hear it due to local QRM on 144.39... but
it
is there.
If you live in the boonies and there is no other local traffic, sometimes
you can pick it up.
But there is no UPLINK there for obvious reasons.
Even in congested areas, sometimes you can receive it on 144.39 if there
is
a moment of silence when it transmits.
In fact, it was that clever idea that kills PCSAT on every orbit. The old
batteries do not have enough power to power both XMTRS at the same time
which is what it is trying to do.
We can send the command to turn off the other XMTR, but then on the next
eclipse, it resets back to BOTH ON. Darn...
Bob, WB4APR
[Non-text portions of this message have been removed]
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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 8, Issue 35
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