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CX2SA > SATDIG 15.08.11 16:17l 895 Lines 25529 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: ARISSat-1 Battery (Jim Jerzycke)
2. Re: Arissat transponder active over Europe. (Jim Cameron "KC9PXZ")
3. Voice Telemetry just at going eclipse (fohuchi@xxxx.xxxx.xx.xxx
4. TLM Data captured EN50LM 3:14UTC on 8-15-2011 (Josh Golladay)
5. ARISSat-1 Telemetry (Greg D.)
6. Re: [suitsat2] ARISSat-1 Battery (Phil Karn)
7. Re: Arissat transponder active over Europe. (Phil Karn)
8. Re: Decoding wideband recordings (Mike Rupprecht)
9. Telemetry Data (Dianne)
10. ARISSat-1 over Sacramento, CA at 2145 PDT (wf6j)
11. ARISSAT-1 Voice Tlm (None) (Rich Dailey)
12. Re: Decoding wideband recordings (Sion Chow Q. C. (9W2QC))
13. Re: Decoding wideband recordings (Mike Rupprecht)
14. ESMO: An Inspirational Hands-On Space Education Project to
the Moon (Trevor .)
15. AO-40/P3D image wanted (John Heath)
16. Re: [suitsat2] ARISSat-1 Battery (Anthony Monteiro)
17. Re: AO-40/P3D image wanted (Peter G?lzow)
18. Videos of Presentations given at AMSAT-UK Colloquium (Trevor .)
----------------------------------------------------------------------
Message: 1
Date: Sun, 14 Aug 2011 23:04:55 +0000
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
To: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>, suitsat2@xxxx.xxx
Subject: [amsat-bb] Re: ARISSat-1 Battery
Message-ID: <4E485497.3010009@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Kind of a 2011 version of AO-7, but without the stable orbit!
73, Jim KQ6EA
On 08/14/2011 10:18 PM, Anthony Monteiro wrote:
> Dear Friends,
>
> This is speculation but it looks to me like we
> have had a bit of good luck regarding the battery.
>
> Looking at the battery voltage from deployment on...
>
> Up until Aug 11, the battery seems to be deteriorating
> "normally" with a slight downtrend in the max voltage
> as expected. But on Aug 11, the battery voltage
> suddenly rises up to 36 V max and the satellite
> has started resetting in eclipse.
>
> I think the explanation is that the battery experienced a
> significant event on Aug 11 where it lost the electrolyte
> in one or more cells. If this is true, the bad news is
> that it will no longer hold a charge and will not operate
> in eclipse any more.
>
> But the good news is that without electrolyte,
> it would also stop dendrite growth that causes
> the eventual battery short circuit.
>
> In our ground testing, our test battery failed in the
> usual way with the battery load increasing until the
> solar panels could not drive the power bus high enough to
> run the satellite. But interestingly, several cells also
> cracked and dumped their electrolyte during this testing.
>
> If a cell on the flight battery cracked and dumped its
> electrolyte BEFORE the shorts were formed, it should
> stay that way and the satellite may very well continue
> to operate in the sun until it starts to re-enter. We just
> need some luck to avoid a bad solar angle that would cause a
> reset in sunlight.
>
> Keep your fingers crossed! :)
>
> 73,
> Tony AA2TX
>
>
>
> _______________________________________________
> 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, 14 Aug 2011 18:34:01 -0500
From: "Jim Cameron \"KC9PXZ\"" <kc9pxz@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Arissat transponder active over Europe.
Message-ID: <CC80D516DC1040E482F8ECB73FADDB1C@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
Hi,
I have a question, I don't have a SSB rig so I am FM only, wish I could
decode telemetry and CW that would be a blast! but as I understand I can't
with just FM, or am I wrong? thats OK its a good reson to talk the XYL into
letting me buy another radio. Hi Hi.
So here is how I am set up.
1.I have my IC28H interfaced to recieve, working on the transmit. with my
diemound 510 vert at 50 ft. The rig i tuned to 145.950 MHZ.
2. I use AMsat Predict to track, I am going to go to a program I can track
more than one bird at a time with. The nice thing about HRD is the count
down to the pass with computer voice, Last I checked HRD was not able to
track ARISSsat1.
3. The tracking program runs in the back ground, I am running MMSSTV for
SSTV from ARRISsat1 and its running in the back ground as well
4. I use a program called scanner recorder to record the Audio of the pass.
you can do this with MMSSTV to but you have to do it manuailly. With scanner
recorder once you set it up to record it will do it on its own.
So here is my question, I do get the voice telemetry in the message giving
the stats on the bird. If I send this in does it count for a voice contact?
or just the secret word? On the secret word contest can you enter each time
you hear it, or one of them even if its the same word you already logged
or only if there diffrent from what you have already logged? hope that makes
sence.
Also I am confused, Eric, said "
Since I was listening with a FCD I saw activity on the transponder also.
heard EA1JM calling cq." On ARRISSsat1? Live? i did not think we were able
to contact each other vie ARISSsat1? I guess that part really confussed me,
Eric can you be a little clearer for at the vary least me, if you would
please? Thank you.
thanks for taking the time to read my post,
73
KC9PXZ
Jimmy
En43qt
Norwalk, Wisconsin
----- Original Message -----
From: "Eric Knaps, ON4HF" <on4hf@xxxxxxx.xx>
To: "Amsat - BBS" <amsat-bb@xxxxx.xxx>
Sent: Sunday, August 14, 2011 4:18 PM
Subject: [amsat-bb] Arissat transponder active over Europe.
> Hello,
>
> I was listening to a 21:05 utc pass over Europe and got a nice sstv
> picture and voice telemetry in full power mode. Since I was listening with
> a FCD I saw activity on the transponder also.
> I heard EA1JM calling cq.
> As soon as it went in eclipse I heard nothing anymore untill LOS.
>
> 73,
> Eric.
>
> --
> Amateur Radio Station ON4HF
> Eric Knaps
> Satellite manager UBA
>
> Tel. +32472985876 (mobile)
>
> http://www.on4hf.be
------------------------------
Message: 3
Date: Mon, 15 Aug 2011 10:08:10 +0900
From: <fohuchi@xxxx.xxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Voice Telemetry just at going eclipse
Message-ID:
<20110815010810.EPHA19853.smtpa52.m3.home.ne.jp@xxxxxxxx.xx.xxxx.xx.xx>
Content-Type: text/plain; charset=iso-2022-jp
Dear Sir,
Attached are telemetry on FM voice for your study.
During telemetry announcement, FM signal sttoped, maybe due to battery
voltage down.
August 14, 2011 at 1049 UTC, Telemetry on FM voice, just after AOS
MET is ?? minutes (I could not copy with QSB/Noise)
IHU Temp is plus ?? degrees C (I could not copy with QSB/Noise)
Control Panel Temp is plus 61 degrees C
Battery Voltage is 36.014
Battery Current is minus 4 milliAmps
August 14, 2011 at 1051 UTC, Telemetry on FM voice
MET is 69 minutes
IHU Temp is plus 48 degrees C
Control Panel Temp is plus 61 degrees C
Battery Voltage is 36.014
Battery Current is minus 8 milliAmps
August 14, 2011 at 1053 UTC, Telemetry on FM voice
MET is 72 minutes
IHU Temp is plus 48 degrees C
Control Panel Temp is plus 6? degrees C
Battery Voltage is 31.
FM carrier stopped just at this point, after announcement of battery voltage
drop down to 31 V. It is not LOS yet.
Not calculated, but orbit prediction of this pass is VVN. Satellite goes
into eclipse during this pass. I think ARISSAT1 lost solar panel power and
stopped soon.
I wish this data helps you.
Thank you,
Fujio JO1XWH
------------------------------
Message: 4
Date: Sun, 14 Aug 2011 22:45:10 -0500
From: Josh Golladay <joshgolladay@xxxxx.xxx>
To: tlmreport@xxxxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] TLM Data captured EN50LM 3:14UTC on 8-15-2011
Message-ID:
<CADOob_sgd83WBwLpv6xBiiZzQROQBa65HzDZuTh_wKaOGoQJpg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Received in Normal, IL Grid square EN50LM at 03:14 UTC 8-15-2011
MET = 69 MINUTES
IHU Temp = +45
Control Panel Temp = +50
Battery Voltage = 35.77V
Battery Current is -4ma
------------------------------
Message: 5
Date: Sun, 14 Aug 2011 22:08:28 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ARISSat-1 Telemetry
Message-ID: <BLU133-W22361AC5ED820F01CD4D5DA9260@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
I caught two sets of voice telemetry on the 04:44z pass over Northern
California:
MET = 64
IHU temp = 41c
Control panel temp = 42c
Battery voltage = 35.73v
Current = -20ma
MET =69
IHU temp = 40c
Control panel temp = 42c
Battery voltage = 35.74v
Current = +0ma
Looks like the temperature situation has improved considerably.
I also heard the "secret word", but it was different than the last time (a
few days ago). Is there more than one per language (both were in English)?
Greg KO6TH
------------------------------
Message: 6
Date: Sun, 14 Aug 2011 22:26:19 -0700
From: Phil Karn <karn@xxxx.xxx>
To: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>, suitsat2@xxxx.xxx
Subject: [amsat-bb] Re: [suitsat2] ARISSat-1 Battery
Message-ID: <4E48ADFB.3050202@xxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/14/11 6:11 PM, Anthony Monteiro wrote:
> Yes, Zinc dendrites will form also if the battery is
> overcharged but we should not be able to do that on
> ARISSat-1 so only the silver ones should be an issue.
Oh, so they form on both plates. Interesting. Charging the battery
plates out zinc metal on the negative plates, but any metallic silver on
the positive plates should be oxidized back to silver oxide. Silver
dendrites should form only during discharge, right?
-Phil
------------------------------
Message: 7
Date: Sun, 14 Aug 2011 23:00:18 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
To: "Jim Cameron \"KC9PXZ\"" <kc9pxz@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Arissat transponder active over Europe.
Message-ID: <4E48B5F2.70601@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/14/11 4:34 PM, Jim Cameron "KC9PXZ" wrote:
> I have a question, I don't have a SSB rig so I am FM only, wish I could
> decode telemetry and CW that would be a blast! but as I understand I
> can't with just FM, or am I wrong?
That's correct. It's just not possible to design a highly
power-efficient digital modulation method using a NBFM receiver. That
requires a linear channel. A FM receiver is nonlinear; it doesn't
respond to the amplitude of the signal, and many have limiters. A SSB
receiver is "linear" in the sense that there's no limiter and the
stronger the RF signal the stronger the audio output. That's why SSB is
used for weak signal work, among other things.
The main drawback to the use of standard SSB receivers is of course the
great sensitivity to Doppler shift that requires constant tuning.
Ideally everyone will move to software defined radios using hardware
front ends that are both linear and wideband. The SDX satellite
transponder is itself a software defined radio, and using its full
capabilities in a future satellite will require a SDR on the ground.
-Phil
------------------------------
Message: 8
Date: Mon, 15 Aug 2011 09:13:30 +0200
From: "Mike Rupprecht" <mail@xxxxxxxxxxxxxx.xx>
To: "'Sion Chow Q. C. \(9W2QC\)'" <9w2qc@xxxxx.xxx>, "'Bruce
Robertson'" <ve9qrp@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Decoding wideband recordings
Message-ID: <001401cc5b1a$d61269b0$82373d10$@xx>
Content-Type: text/plain; charset="us-ascii"
Sion,
another point to the DDE aspect:
just working on the DDE link between SATCONTROL and HDSDR. At the moment
HDSDR supports only Orbitron (Doppler tracking interval 1s), HRD and
WXtrack.
If I change the application name of SATCONTROL to Orbitron, the link can be
established and it works. The idea behind is to end the LO Frequency to the
FUNCubeDonge once - and keep it fix - BUT change the TUNE frequency of
HDSDR. This is possible in 1 Hz steps, so you can follow a narrowband signal
(CW/BPSK) much continuously.
(You can't change the LO Frequency of the FCD in 1 Hz steps).
73, Mike
DK3WN
If HDSDR could use the DDE output of WISP, it can start recording when
a satellite name appears, and stop when '*** NO Satellite ***' appears.
These are just some of my thoughts to make automatic unattended
reception easier, but I must say that DK3WN's FCD control + HDSDR are
really great pieces of software. Thank you to all those involved in
their development :)
73, Sion, 9M2CQC
_______________________________________________
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: Sun, 14 Aug 2011 20:58:43 -0700
From: "Dianne" <dgwhite@xxx.xx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Telemetry Data
Message-ID: <9F.79.15242.B79984E4@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Hello,
You asked for "emergency mode" data, and I'm not sure what you meant, but I
have some that may or may not qualify.
We are located in San Diego, California
At 03:07 UTC (8:07 PM PDT (local))
MET was 62 minutes
IHU Temp was +45 degrees C
Control Panel Temp was +50 degrees C
Battery Voltage was 33.77 V
Battery Current was -8 mA
At 03:12 UTC (8:12 PM PDT (local))
MET was 67 minutes
IHU Temp was +45 degrees C
Control Panel Temp was +50 degrees C
Battery Voltage was 35.73 V
Battery Current was -8 mA
The "secret words" that we heard were the ones from the two American boys
("Explore") and the two British girls ("Eagle")
I don't know if that was what you were looking for, or if it was at all
helpful, but I figured you'd rather have extra data than not.
-Lindsay White
KI6LZN
www.mchsarc.com <http://www.mchsarc.com/>
------------------------------
Message: 10
Date: Sun, 14 Aug 2011 23:12:59 -0700
From: wf6j <wf6j@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ARISSat-1 over Sacramento, CA at 2145 PDT
Message-ID: <BCC0BB88-4E15-44CD-8FB9-545D4921DF57@xxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; Format="flowed";
DelSp="yes"
Here is the audio I copied from ARISSAT-1 on the 9:45 pm PDT pass over
Sacramento, CA tonight.
While dark out here, you can hear the voice say:
NEC Temp A+40 degrees C
COntrol Panel Temp A+42 degrees C
Battery VOltage A 35.74 volts
after that I wasn't sure what was said, but attached is the audio file.
73,
Carl, WF6J
wf6j@xxxxxxxxx.xxx
-------------- next part --------------
------------------------------
Message: 11
Date: Mon, 15 Aug 2011 04:15:44 -0400
From: Rich Dailey <redailey1@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ARISSAT-1 Voice Tlm (None)
Message-ID: <7.0.0.16.2.20110815041158.05ed3fd8@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Heard nothing on 145.950 from 802-812 UTC Aug 15. I'm assuming this is
expected
as it was in eclipse. Sri, I've not been able to follow the battery issue
thread due to other
commitments. Just happened to be up in the wee hours to listen.
Rich, N8UX.
------------------------------
Message: 12
Date: Mon, 15 Aug 2011 04:46:56 -0400
From: "Sion Chow Q. C. (9W2QC)" <9w2qc@xxxxx.xxx>
To: Mike Rupprecht <mail@xxxxxxxxxxxxxx.xx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Decoding wideband recordings
Message-ID: <20110815044656.40225254qjzx1xk4@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
Mike,
First of all, thank you for the very great software :)
Just to clarify, in this case you will be tuning dopper at HDSDR
instead of FCD control level? Which if I get it right will result in
the I/Q of the pass being recorded without doppler control?
73, Sion, 9M2CQC
Quoting Mike Rupprecht <mail@xxxxxxxxxxxxxx.xx>:
> Sion,
>
> another point to the DDE aspect:
>
> just working on the DDE link between SATCONTROL and HDSDR. At the moment
> HDSDR supports only Orbitron (Doppler tracking interval 1s), HRD and
> WXtrack.
>
> If I change the application name of SATCONTROL to Orbitron, the link can be
> established and it works. The idea behind is to end the LO Frequency to the
> FUNCubeDonge once - and keep it fix - BUT change the TUNE frequency of
> HDSDR. This is possible in 1 Hz steps, so you can follow a narrowband signal
> (CW/BPSK) much continuously.
> (You can't change the LO Frequency of the FCD in 1 Hz steps).
>
> 73, Mike
> DK3WN
>
>
> If HDSDR could use the DDE output of WISP, it can start recording when
> a satellite name appears, and stop when '*** NO Satellite ***' appears.
>
> These are just some of my thoughts to make automatic unattended
> reception easier, but I must say that DK3WN's FCD control + HDSDR are
> really great pieces of software. Thank you to all those involved in
> their development :)
>
> 73, Sion, 9M2CQC
>
>
>
>
> _______________________________________________
> 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: 13
Date: Mon, 15 Aug 2011 10:57:34 +0200
From: "Mike Rupprecht" <mail@xxxxxxxxxxxxxx.xx>
To: "'Sion Chow Q. C. \(9W2QC\)'" <9w2qc@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Decoding wideband recordings
Message-ID: <002e01cc5b29$6042f790$20c8e6b0$@xx>
Content-Type: text/plain; charset="iso-8859-1"
Sion,
exactly, the LO frequency of the FCD should be set to a fixed frequency,
e.g. the center frequency of the pass band.
You "move" the TUNE frequency with HDSDR through the spectrum according the
doppler correction.
73, Mike
DK3WN
-----Urspr?ngliche Nachricht-----
Von: Sion Chow Q. C. (9W2QC) [mailto:9w2qc@xxxxx.xxxx
Gesendet: Montag, 15. August 2011 10:47
An: Mike Rupprecht
Cc: amsat-bb@xxxxx.xxx
Betreff: Re: AW: [amsat-bb] Re: Decoding wideband recordings
Mike,
First of all, thank you for the very great software :)
Just to clarify, in this case you will be tuning dopper at HDSDR
instead of FCD control level? Which if I get it right will result in
the I/Q of the pass being recorded without doppler control?
73, Sion, 9M2CQC
Quoting Mike Rupprecht <mail@xxxxxxxxxxxxxx.xx>:
> Sion,
>
> another point to the DDE aspect:
>
> just working on the DDE link between SATCONTROL and HDSDR. At the moment
> HDSDR supports only Orbitron (Doppler tracking interval 1s), HRD and
> WXtrack.
>
> If I change the application name of SATCONTROL to Orbitron, the link can
be
> established and it works. The idea behind is to end the LO Frequency to
the
> FUNCubeDonge once - and keep it fix - BUT change the TUNE frequency of
> HDSDR. This is possible in 1 Hz steps, so you can follow a narrowband
signal
> (CW/BPSK) much continuously.
> (You can't change the LO Frequency of the FCD in 1 Hz steps).
>
> 73, Mike
> DK3WN
>
>
> If HDSDR could use the DDE output of WISP, it can start recording when
> a satellite name appears, and stop when '*** NO Satellite ***' appears.
>
> These are just some of my thoughts to make automatic unattended
> reception easier, but I must say that DK3WN's FCD control + HDSDR are
> really great pieces of software. Thank you to all those involved in
> their development :)
>
> 73, Sion, 9M2CQC
>
>
>
>
> _______________________________________________
> 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: 14
Date: Mon, 15 Aug 2011 11:51:07 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] ESMO: An Inspirational Hands-On Space Education
Project to the Moon
Message-ID:
<1313405467.3697.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Thanks to the hard work of volunteers from the British Amateur Television
Club (BATC) the video of the presentation on the European Student Moon
Orbiter (ESMO) given by Dr. Susan Jason to the AMSAT-UK Colloquium is now
available.
You can watch the video online at http://www.batc.tv/
Click on the 'Film Archive' icon
Select 'AMSAT 2011' from the Category drop down menu
Click 'Select Category'
Select video 'ESMO Update'
Click on 'Select Stream'
Click the play icon '>' on the player
Clicking on the icon to the left of the player volume control will give you
full screen display.
You can also download the video file to your PC
http://www.batc.tv/vod/ESMO.flv
The PowerPoint slides are at
<http://www.uk.amsat.org/wp-content/uploads/colloquium
2011/ESMO-Presentation-for-AMSAT-UK-2011.ppt>
AMSAT-UK publishes a color A4 newsletter, OSCAR News, which is full of
Amateur Satellite information.
Join online at http://tinyurl.com/JoinAMSAT-UK/
The Spring OSCAR News can be seen at
http://www.uk.amsat.org/on_193_final.pdf
AMSAT-UK: http://www.uk.amsat.org/
73 Trevor M5AKA
------------------------------
Message: 15
Date: Mon, 15 Aug 2011 13:42:17 +0100 (BST)
From: John Heath <g7hia@xxxxxxxxxx.xxx>
To: Amsat <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] AO-40/P3D image wanted
Message-ID: <1313412137.30078.YahooMailRC@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Hi,
Can anyone on the list point me to source of high resolution images of
AO-40/P3E.
Need it for a magazine article. The images found via google are all low res.
Tried Peter DB2OS at amsat-dl but no reply as yet, and my deadline is two days
away.
Thanks
John
G7HIA
------------------------------
Message: 16
Date: Mon, 15 Aug 2011 08:45:44 -0400
From: Anthony Monteiro <aa2tx@xxxxxxx.xxx>
To: Phil Karn <karn@xxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>, suitsat2@xxxx.xxx
Subject: [amsat-bb] Re: [suitsat2] ARISSat-1 Battery
Message-ID: <4E4914F8.6040707@xxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Hi Phil,
Yes, that is correct.
73,
Tony AA2TX
---
On 8/15/2011 1:26 AM, Phil Karn wrote:
> On 8/14/11 6:11 PM, Anthony Monteiro wrote:
>
>> Yes, Zinc dendrites will form also if the battery is
>> overcharged but we should not be able to do that on
>> ARISSat-1 so only the silver ones should be an issue.
>
> Oh, so they form on both plates. Interesting. Charging the battery
> plates out zinc metal on the negative plates, but any metallic silver on
> the positive plates should be oxidized back to silver oxide. Silver
> dendrites should form only during discharge, right?
>
> -Phil
>
>
>
------------------------------
Message: 17
Date: Mon, 15 Aug 2011 15:17:45 +0200
From: Peter G?lzow <peter.guelzow@xxxxxx.xx>
To: John Heath <g7hia@xxxxxxxxxx.xxx>, Amsat <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: AO-40/P3D image wanted
Message-ID: <e0b5ad31-c3d8-47c9-a369-11d6b71fa447@xxxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi John,
will send you some pictures later this evening, but you can find them also
on www.amsat-dl.org in the Gallery.
73s Peter
--
Sent by Android mobile K-9 Mail.
John Heath <g7hia@xxxxxxxxxx.xxx> schrieb:
Hi,
Can anyone on the list point me to source of high resolution images of
AO-40/P3E.
Need it for a magazine article. The images found via google are all low res.
Tried Peter DB2OS at amsat-dl but no reply as yet, and my deadline is two days
away.
Thanks
John
G7HIA
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------------------------------
Message: 18
Date: Mon, 15 Aug 2011 15:09:05 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Videos of Presentations given at AMSAT-UK
Colloquium
Message-ID:
<1313417345.77274.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Thanks to the hard work of volunteers from the British Amateur Television
Club (BATC) 14 videos of the presentations given to the AMSAT-UK
International Space Colloquium held in Guildford July 30-31 are now available.
You can watch the video online at http://www.batc.tv/
Click on the 'Film Archive' icon
Select 'AMSAT 2011' from the Category drop down menu
Click 'Select Category'
Select the video you wish to watch?
Click on 'Select Stream'
Click the play icon '>' on the player
Clicking on the icon to the left of the player volume control will give you
full screen display.
You can also download a video file to your PC by clicking on the 'Click
Here' link under the player.
Some of the PowerPoint slides can also be downloaded by following the links
in the Videos story at http://www.uk.amsat.org/
73 Trevor M5AKA
------------------------------
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End of AMSAT-BB Digest, Vol 6, Issue 466
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