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CX2SA > SATDIG 07.08.11 17:15l 686 Lines 22776 Bytes #999 (0) @ WW
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Today's Topics:
1. ARISSat TLM: Sample rate of Signalink (Werner, HB9BNK)
2. Re: Life Expectancy ARISat-1 (Joe)
3. Re: ARISSat TLM: Sample rate of Signalink (Alan P. Biddle)
4. Transponder 1412Z (Rsoifer@xxx.xxxx
5. Re: Transponder 1412Z (Glenn AA5PK)
6. Re: ARISSat: strong QRM due to ISS (andy thomas)
7. Re: Transponder 1412Z (Rsoifer@xxx.xxxx
8. Re: ARISSat-1 possible critical height (Mike Schaffer)
9. Orbital lifetime of ARRISat-1 (DeYoung James)
10. Re: Life Expectancy ARISat-1 (Nico Janssen)
11. Re: ARISSat TLM: Sample rate of Signalink (Dave Webb KB1PVH)
12. Re: ARISSat-1 possible critical height (Joe Fitzgerald)
13. Re: ARISSat: strong QRM due to ISS (Matthias Bopp)
14. Rotator repair pictures (PA3GUO)
15. Re: Life Expectancy ARISat-1 (Robert McGwier)
16. Re: Transponder 1412Z (K2AK - Jeff)
----------------------------------------------------------------------
Message: 1
Date: Sun, 07 Aug 2011 15:48:48 +0200
From: "Werner, HB9BNK" <hb9bnk@xxxx.xx>
Subject: [amsat-bb] ARISSat TLM: Sample rate of Signalink
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4E3E97C0.5060502@xxxx.xx>
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
While I have been decoding some frames in an earlier pass using
another pc, I have no luck using the Signalink USB attached to to
AF-Port on the IC910H (cw decoding works very well)
How can I verify it's sample rate and - if necessary - set it to
48 kHz ?
thanks
Werner, HB9BNK
------------------------------
Message: 2
Date: Sun, 07 Aug 2011 09:02:28 -0500
From: Joe <nss@xxx.xxx>
Subject: [amsat-bb] Re: Life Expectancy ARISat-1
To: amsat-bb@xxxxx.xxx
Message-ID: <4E3E9AF4.60003@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I remember that a few years ago with some other bird Like Ande or
something like that?
Joe WB9SBD
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 8/7/2011 2:47 AM, Jeff Yanko wrote:
> If anything, maybe this calls for another Chicken Little Contest to see who
> can come the closest to predicting re-entry.
>
>
> 73,
>
> Jeff WB3JFS
>
>
>
>
> ----- Original Message -----
> From: "Phil Karn"<karn@xxxxxxxx.xxx>
> To: "James"<kb7tbt@xxxxx.xxx>
> Cc:<amsat-bb@xxxxx.xxx>
> Sent: Sunday, August 07, 2011 12:34 AM
> Subject: [amsat-bb] Re: Life Expectancy ARISat-1
>
>
>> On 8/6/11 8:55 PM, James wrote:
>>> Thank you for your informative contribution..
>>>
>>> Anyone with a real answer?
>> Well, an educated guess can be made by looking at a plot of ISS altitude
>> vs time:
>>
>> http://www.heavens-above.com/IssHeight.aspx
>>
>> The ISS is periodically reboosted, accounting for the sudden jumps in
>> this sawtooth-like graph. Obviously ARISSat-1 won't be reboosted, so if
>> you extrapolate the downward-sloping parts of the graph you can get a
>> rough idea of what will happen.
>>
>> The ISS orbital decay rate varies with changes in upper atmospheric
>> density with solar activity, but also because of changes in its attitude
>> and the operation of the solar panels.
>>
>> The orbital decay rate also depends on qthe ballistic coefficient of the
>> object. This has units of mass divided by area -- the mass of the object
>> divided by the cross-sectional area it presents in its direction of
>> flight. The larger the ballistic coefficient, the less its deceleration
>> from drag as it flies through the thin upper atmosphere.
>>
>> The ISS probably has a larger ballistic coefficient than any other
>> satellite simply because it's so huge. The volume of most objects
>> increases as the cube of the size while the cross-sectional area
>> increases with the square. Since mass is usually a function of volume, a
>> large object will generally have a higher ballistic coefficient and last
>> longer in a given orbit than a small object.
>>
>> Obviously there are exceptions to the "large lives longer" rule such as
>> the "Echo" balloons. The actual ballistic coefficient for any given
>> satellite has to be computed from its actual mass and dimensions and its
>> orientation relative to its velocity vector. The ISS is a huge
>> satellite, but it also has lightweight solar wings that greatly increase
>> its cross-sectional area without increasing its mass very much, so they
>> decrease its ballistic coefficient somewhat.
>>
>> ARISSat-1 is far smaller than the ISS, but it is fairly heavy for its
>> size and it lacks large solar wings that create a lot of drag. This will
>> reduce its decay rate, but it will still probably decay more quickly
>> than the ISS.
>>
>> It was tossed out the back of the ISS against the velocity vector, and
>> that immediately put it in a lower energy orbit with a higher mean
>> motion. But any further increase in mean motion will be due to orbital
>> decay, and from that we should be able to estimate its ballistic
>> coefficient and how it will likely behave in the future. Determining an
>> exact lifetime would be difficult because of the difficulty of
>> predicting solar activity, but a good estimate can probably be made.
>>
>> --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: 3
Date: Sun, 7 Aug 2011 09:17:15 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat TLM: Sample rate of Signalink
To: "'Werner, HB9BNK'" <hb9bnk@xxxx.xx>, "'AMSAT-BB'"
<amsat-bb@xxxxx.xxx>
Message-ID: <7DCFE521C6164B6F924C09EBFE5B5E77@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Werner,
I have had exactly the same results, and yes, 48 kHz is correct according to
the program author. Based on reports I have received, and considerable
experimentation, it seems to be a poor performer in this mode. So far,
nobody has reported success with the unit on any radio. Other cards work
fine, even holding a microphone in front of the speaker. There is nice
discussion here about both internal noise and non-linear response issues,
and some fixes here:
http://www.frenning.dk/OZ1PIF_HOMEPAGE/SignaLinkUSB-mods.html
I am retiring the unit, so will not be trying these modifications to see
whether that helps. From reports I have received, a simple audio patch
between the rig and a standard soundcard works well.
73s,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Werner, HB9BNK
Sent: Sunday, August 07, 2011 8:49 AM
To: AMSAT-BB
Subject: [amsat-bb] ARISSat TLM: Sample rate of Signalink
While I have been decoding some frames in an earlier pass using
another pc, I have no luck using the Signalink USB attached to to
AF-Port on the IC910H (cw decoding works very well)
How can I verify it's sample rate and - if necessary - set it to
48 kHz ?
thanks
Werner, HB9BNK
_______________________________________________
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: Sun, 7 Aug 2011 10:25:59 -0400 (EDT)
From: Rsoifer@xxx.xxx
Subject: [amsat-bb] Transponder 1412Z
To: amsat-bb@xxxxx.xxx
Message-ID: <51c8.27786544.3b6ffa77@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
I heard myself calling CQ for about 2 minutes, peaking 569, but no takers
that I could hear. Then, about 2 minutes later, I heard AA5PK calling CQ,
about the same strength, but I could no longer hear myself.
It's a challenge!
73 Ray W2RS
------------------------------
Message: 5
Date: Sun, 7 Aug 2011 09:42:44 -0500
From: "Glenn AA5PK" <aa5pk@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Transponder 1412Z
To: <amsat-bb@xxxxx.xxx>
Cc: Rsoifer@xxx.xxx
Message-ID: <D481E87DFE3E49B299D7AC3962A40E37@xxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
I wish I'd heard you calling, Ray.
Still trying to make my first contact through ARISSat, The QSB is a killer.
73
Glenn AA5PK
----- Original Message -----
From: <Rsoifer@xxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, August 07, 2011 9:25 AM
Subject: [amsat-bb] Transponder 1412Z
>I heard myself calling CQ for about 2 minutes, peaking 569, but no takers
> that I could hear. Then, about 2 minutes later, I heard AA5PK calling CQ,
> about the same strength, but I could no longer hear myself.
>
> It's a challenge!
>
> 73 Ray W2RS
> _______________________________________________
> 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: 6
Date: Sun, 7 Aug 2011 10:11:35 +0100 (BST)
From: andy thomas <andythomasmail@xxxxx.xx.xx>
Subject: [amsat-bb] Re: ARISSat: strong QRM due to ISS
To: amsat <amsat-bb@xxxxx.xxx>
Message-ID:
<1312708295.94616.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Yes, I also heard packet bursts while listening to ARISSat at 0140 utc and
around 0500 utc with the doppler corrected. I didn't decode them though. The
doppler correction applies both to the ISS (approximately) and the satellite.
andy, G0SFJ
------------------------------
Message: 7
Date: Sun, 7 Aug 2011 10:53:39 -0400 (EDT)
From: Rsoifer@xxx.xxx
Subject: [amsat-bb] Re: Transponder 1412Z
To: aa5pk@xxxxxxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <5c59.129d40d3.3b7000f3@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Hi Glenn,
I haven't made a QSO yet either. The biggest problem, I think, is the
satellite's tumbling, which results in frequent obstruction of the little
uplink antenna by the main body of the spacecraft. On this pass, when I
could
see the uplink antenna, you couldn't, and vice versa. The rapid Doppler,
due to the low altitude, doesn't help either.
I'll try again tomorrow morning.
73 Ray
In a message dated 8/7/2011 2:42:54 P.M. GMT Standard Time,
aa5pk@xxxxxxxxxx.xxx writes:
I wish I'd heard you calling, Ray.
Still trying to make my first contact through ARISSat, The QSB is a
killer.
73
Glenn AA5PK
----- Original Message -----
From: <Rsoifer@xxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Sunday, August 07, 2011 9:25 AM
Subject: [amsat-bb] Transponder 1412Z
>I heard myself calling CQ for about 2 minutes, peaking 569, but no
takers
> that I could hear. Then, about 2 minutes later, I heard AA5PK calling
CQ,
> about the same strength, but I could no longer hxxx.xxx>
Subject: [amsat-bb] Re: ARISSat-1 possible critical height
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID:
<1312727374.94326.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Question:
?
Hi,
what could be the critical height (closest to the earth)? for the satellite,
where the temperatures will degrade the operation?
thanks
Giulio AB2VY
----------
Answer:
?
Giulio:
?
The Karman line lies at an altitude of 62 miles above the Earth's sea level,
and is commonly
used to define the boundary between the Earth's atmosphere and outer space.
?
?
Mike Schaffer
KA3JAW
Tampa, Florida
EL86SU
------------------------------
Message: 9
Date: Sun, 7 Aug 2011 05:59:49 -0700 (PDT)
From: DeYoung James <deyoung_james@xxxxx.xxx>
Subject: [amsat-bb] Orbital lifetime of ARRISat-1
To: amsat-bb <amsat-bb@xxxxx.xxx>
Message-ID:
<1312721989.96905.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Greetings,
?
If you were a member of AMSAT-NA you would receive the AMSAT Journal and
could have read the article I wrote for the last issue?concerning the
predicted lifetime of ARRISat-1. The paper presented predictions for up to a
maximum?release height of 370-km and there is enough information to
extrapole to the higher release height as realized. The recent reboosts put
the release height somewhat higher but I would guess a lifetime of about one
year.? The actual Sun-state?influences the?atmospheric densities?of the
future that ARRISat-1 passes through will control the actual lifetime.?Even
tho?I am all packed up to move to my retirement home I?will write a short
update to that paper using the actual release height and submit it?to the
Journal.? I would encourage everyone (if you aren't a member already) to
join AMSAT-NA and read the journal there is a lot of good stuff there.
?
Jim, N8OQ
------------------------------
Message: 10
Date: Sun, 07 Aug 2011 12:40:08 +0200
From: Nico Janssen <hamsat@xxxxxx.xx>
Subject: [amsat-bb] Re: Life Expectancy ARISat-1
To: amsat-bb@xxxxx.xxx
Message-ID: <4E3E6B88.40406@xxxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 2011-08-07 09:34, Phil Karn wrote:
> On 8/6/11 8:55 PM, James wrote:
>>
>> Thank you for your informative contribution..
>>
>> Anyone with a real answer?
>
> Well, an educated guess can be made by looking at a plot of ISS altitude
> vs time:
>
> http://www.heavens-above.com/IssHeight.aspx
>
> The ISS is periodically reboosted, accounting for the sudden jumps in
> this sawtooth-like graph. Obviously ARISSat-1 won't be reboosted, so if
> you extrapolate the downward-sloping parts of the graph you can get a
> rough idea of what will happen.
>
> The ISS orbital decay rate varies with changes in upper atmospheric
> density withile the cross-sectional area
> increases with the square. Since mass is usually a function of volume, a
> large object will generally have a higher ballistic coefficient and last
> longer in a given orbit than a small object.
>
> Obviously there are exceptions to the "large lives longer" rule such as
> the "Echo" balloons. The actual ballistic coefficient for any given
> satellite has to be computed from its actual mass and dimensions and its
> orientation relative to its velocity vector. The ISS is a huge
> satellite, but it also has lightweight solar wings that greatly increase
> its cross-sectional area without increasing its mass very much, so they
> decrease its ballistic coefficient somewhat.
>
> ARISSat-1 is far smaller than the ISS, but it is fairly heavy for its
> size and it lacks large solar wings that create a lot of drag. This will
> reduce its decay rate, but it will still probably decay more quickly
> than the ISS.
>
> It was tossed out the back of the ISS against the velocity vector, and
> that immediately put it in a lower energy orbit with a higher mean
> motion. But any further increase in mean motion will be due to orbital
> decay, and from that we should be able to estimate its ballistic
> coefficient and how it will likely behave in the future. Determining an
> exact lifetime would be difficult because of the difficulty of
> predicting solar activity, but a good estimate can probably be made.
>
> --Phil
>
Actually the TLEs give you the values for the drag (First Time
Derivative of the Mean Motion) and for the ballistic coefficient
(BSTAR drag term). Note that in the TLEs the definition of the
ballistic coefficient is the inverse of Phil's definition, i.e.
the higher the BSTAR value, the higher the drag.
When comparing the latest TLE sets for the ISS and for ARISSat-1,
it appears that the drag for the satellite is roughly twice as
high as for the ISS. But since the values for the drag vary a lot
from one TLE set to the next, it helps to use average values over
a number of TLE sets.
73,
Nico PA0DLO
------------------------------
Message: 11
Date: Sun, 7 Aug 2011 10:39:52 -0400
From: Dave Webb KB1PVH <kb1pvh@xxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat TLM: Sample rate of Signalink
To: APBIDDLE@xxxxxxx.xxx
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<CAEMY9FfqmxwfM0JPFQqWXQ1_4ttU2V7Af1h7OwXS1+sPrHza=A@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I ended up using the Signalink for SSTV RX and went from speaker out on
radio to mic in on computer to decode frames.
Dave - KB1PVH
Sent from my Verizon Wireless DROID X
------------------------------
Message: 12
Date: Sun, 07 Aug 2011 10:55:29 -0400
From: Joe Fitzgerald <jfitzgerald@xxxx.xxx.xxx>
Subject: [amsat-bb] Re: ARISSat-1 possible critical height
To: amsat-bb@xxxxx.xxx
Message-ID: <4_________________________________________
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: Sun, 7 Aug 2011 12:09:00 +0200
From: "PA3GUO" <pa3guo@xxxxx.xxx>
Subject: [amsat-bb] Rotator repair pictures
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000101cc54ea$080d94d0$1828be70$@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Since the topic of stuck rotators appears each month in this group;
Ivo, PA1IVO, fixed his G-5500 rotator and has uploaded very clear pictures
of the repair process to his website.
When you need to start fixing & disassembling your own rotor this helps a
lot !
http://ivok.home.xs4all.nl/pa1ivo/G-5500.html
Henk, PA3GUO
<http://www.pa3guo.com> http://www.pa3guo.com
------------------------------
Message: 15
Date: Sun, 7 Aug 2011 07:48:06 -0400
From: Robert McGwier <rwmcgwier@xxxxx.xxx>
Subject: [amsat-bb] Re: Life Expectancy ARISat-1
To: Jeff Yanko <wb3jfs@xxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <BEF750BD-F59A-431B-9069-03DDB7AA3E4C@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I would prefer having a set of orbital elements that actually correctly
predicts AOS/LOS times for a couple of days to start my "SWAG" on when it
will reenter.
Sent from my iPad
On Aug 7, 2011, at 3:47 AM, "Jeff Yanko" <wb3jfs@xxx.xxx> wrote:
> If anything, maybe this calls for another Chicken Little Contest to see who
> can come the closest to predicting re-entry.
>
>
> 73,
>
> Jeff WB3JFS
>
>
>
>
> ----- Original Message -----
> From: "Phil Karn" <karn@xxxxxxxx.xxx>
> To: "James" <kb7tbt@xxxxx.xxx>
> Cc: <amsat-bb@xxxxx.xxx>
> Sent: Sunday, August 07, 2011 12:34 AM
> Subject: [amsat-bb] Re: Life Expectancy ARISat-1
>
>
>> On 8/6/11 8:55 PM, James wrote:
>>>
>>> Thank you for your informative contribution..
>>>
>>> Anyone with a real answer?
>>
>> Well, an educated guess can be made by looking at a plot of ISS altitude
>> vs time:
>>
>> http://www.heavens-above.com/IssHeight.aspx
>>
>> The ISS is periodically reboosted, accounting for the sudden jumps in
>> this sawtooth-like graph. Obviously ARISSat-1 won't be reboosted, so if
>> you extrapolate the downward-sloping parts of the graph you can get a
>> rough idea of what will happen.
>>
>> The ISS orbital decay rate varies with changes in upper atmospheric
>> density with solar activity, but also because of changes in its attitude
>> and the operation of the solar panels.
>>
>> The orbital decay rate also depends on qthe ballistic coefficient of the
>> object. This has units of mass divided by area -- the mass of the object
>> divided by the cross-sectional area it presents in its direction of
>> flight. The larger the ballistic coefficient, the less its deceleration
>> from drag as it flies through the thin upper atmosphere.
>>
>> The ISS probably has a larger ballistic coefficient than any other
>> satellite simply because it's so huge. The volume of most objects
>> increases as the cube of the size while the cross-sectional area
>> increases with the square. Since mass is usually a function of volume, a
>> large object will generally have a higher ballistic coefficient and last
>> longer in a given orbit than a small object.
>>
>> Obviously there are exceptions to the "large lives longer" rule such as
>> the "Echo" balloons. The actual ballistic coefficient for any given
>> satellite has to be computed from its actual mass and dimensions and its
>> orientation relative to its velocity vector. The ISS is a huge
>> satellite, but it also has lightweight solar wings that greatly increase
>> its cross-sectional area without increasing its mass very much, so they
>> decrease its ballistic coefficient somewhat.
>>
>> ARISSat-1 is far smaller than the ISS, but it is fairly heavy for its
>> size and it lacks large solar wings that create a lot of drag. This will
>> reduce its decay rate, but it will still probably decay more quickly
>> than the ISS.
>>
>> It was tossed out the back of the ISS against the velocity vector, ane author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 16
Date: Sun, 7 Aug 2011 08:06:39 -0700
From: "K2AK - Jeff" <k2ak@xxxx.xxx>
Subject: [amsat-bb] Re: Transponder 1412Z
To: <Rsoifer@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <001101cc5513$9c139390$d43abab0$@xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Ray,
I could hear myself extremely well also using about 20 watts. I tried SSB
and CW no takers. I was trying around center of pass band.
Will listen for other next time instead of running my big mouth.
73,
Jeff - K2AK
DM41
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Rsoifer@xxx.xxx
Sent: Sunday, August 07, 2011 7:26 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Transponder 1412Z
I heard myself calling CQ for about 2 minutes, peaking 569, but no takers
that I could hear. Then, about 2 minutes later, I heard AA5PK calling CQ,
about the same strength, but I could no longer hear myself.
It's a challenge!
73 Ray W2RS
_______________________________________________
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 member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 442
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