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CX2SA > SATDIG 13.04.19 22:40l 683 Lines 23925 Bytes #999 (0) @ WW
BID : AMSATBB14143
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Subj: AMSAT-BB-digest V14 143
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Sent: 190413/2033Z @:CX2SA.SAL.URY.SOAM #:3710 [Salto] FBB7.00e $:AMSATBB14143
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: Australian CubeSat to use 76 GHz (Zach Metzinger)
2. Tutorial on Working APRS Contacts on Kenwood TM-D710
(Clayton Coleman W5PFG)
3. Re: Australian CubeSat to use 76 GHz (W3AB/GEO)
4. Re: Australian CubeSat to use 76 GHz (Mike Seguin)
5. Re: Australian CubeSat to use 76 GHz (Nitin Muttin)
6. Re: Max Valier malfunction (Nitin Muttin)
7. Re: 15-10m satellite transponders to be launched (Tom M0LTE)
8. Max Valier malfunction (HansFong)
9. Re: G5500 - replacement boom clamps? (Eric Garner)
10. Re: Max Valier malfunction (Gabriel Zeifman)
11. Re: G5500 - replacement boom clamps? (GEO Badger)
12. Re: 15-10m satellite transponders to be launched (GEO Badger)
----------------------------------------------------------------------
Message: 1
Date: Sat, 13 Apr 2019 13:53:30 -0500
From: Zach Metzinger <zmetzing@?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Australian CubeSat to use 76 GHz
Message-ID: <6ab1c923-35a3-893e-065c-ec4408b08683@?????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
On 04/13/19 12:26, W3AB/GEO wrote:
> 4) Communication Protocols Modulation techniques that will be
> investigated for the high-speed communications experiment include QPSK,
> 16-QAM and CPFM. If successful, this technology for wavelengths below 10
> cm will increase the data transfer rates by at least 4 orders of
> magnitude while also decreasing the sizes of antennas and the associated
> spacecraft.
Yup, saw that, but it is non-specific as to the interconnect between
uplink/downlink and the modes that we'll be able to run through it.
I'm looking up how to get 76 GHz going. :-)
--- Zach
N0ZGO
------------------------------
Message: 2
Date: Sat, 13 Apr 2019 13:57:31 -0500
From: Clayton Coleman W5PFG <tasmac@?????.??>
To: AMSAT-BB <amsat-bb@?????.???>
Subject: [amsat-bb] Tutorial on Working APRS Contacts on Kenwood
TM-D710
Message-ID: <602c7916-bd06-e33d-53e7-3e03650bc8e6@?????.??>
Content-Type: text/plain; charset=utf-8; format=flowed
Like many topics in the amateur radio world, there is a mix of what is
prescribed in protocol versus how it's applied in the real world.
Bob's right here. There are excess packets created by using APRS
messaging vs a simple "one time" packet being sent as a UI.
The weakness in using the built-in APRS functions of Kenwood, Yaesu, or
other traditionally-terrestrial messaging systems is the load of 'waste'
packets generated vs using a simple UI packet. The APRS messaging
functions will often continue to transmit until they receive an
acknowledgement. This can be problematic in a short-duration LEO
satellite pass, especially when one station tries to message everyone in
their HEARD list!
Many people who operate solely with a radio such a Kenwood are oblivious
to 'waste' packets being digipeated (repeat ACK's, REJ's, etc.) Unless
you're sitting at a terminal and viewing all the packets, your view of
what is passing by is extremely limited; not just by the tiny display of
your radio. For fun, I suggest running a terminal attached to your radio
and monitor all packets at Field Day.
I've observed passes when 10-15 stations were able to exchange packets
and I've observed other passes when 2-3 struggled because one or two
other stations were over-beaconing and sending messages repeatedly.
It's like the many new stations incorrectly assuming the best way to be
digipeated is to keep pressing BCON on their Kenwood radio until the
glorious "MY POS" flashes and they hear a beep! OUCH. Those are
typically people on omni antennas or in their car that have no idea
they've been digipeated every time but their station is not hearing.
Not everyone has the luxury of sitting in their shack to operate a
packet/APRS-capable satellite. At home, I use UISS. By default UISS does
not request acknowledgement or require it. It will only transmit a
message or position packet upon pressing the appropriate function key.
This helps limit the amount of "rapid-firing" typically employed by many
of the folks using transceivers with built-in packet/APRS capabilities.
Occasionally I like to make contacts via ISS or other satellites with
packet digipeaters using either one of my Kenwood mobile or HT
transceivers. Do I use the status text method? No. I use the MSG
function like others on this thread have described. I keep it short and
sweet.
Do you want to strictly adhere to terrestrial protocol rules for
acknowledging messages, often resulting in the logjam of packets, or do
you want to increase efficiency and send the minimal frames necessary to
get a clean exchange via satellite with another station? I leave that up
to the operator.
Have fun.
73
Clayton
W5PFG
P.S. I think the unattended beacons remain my favorite nit-pick of
packet/APRS satellites' use. :-)
------------------------------
Message: 3
Date: Sat, 13 Apr 2019 12:08:01 -0700
From: W3AB/GEO <w3ab@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Australian CubeSat to use 76 GHz
Message-ID: <507e5d82-e256-4243-b7bd-cff5c880a8d7@?????.???>
Content-Type: text/plain; charset=UTF-8
1 - I believe one can address the beamwidth.
2 - I thought they going to measure atmospheric water, perhaps that's why
that freq was chosen.
?___
Sent from my two way wrist watch
73 de W3AB/GEO?
On Apr 13, 2019, 10:47, at 10:47, Robert Switzer <rs2atmink@?????.???> wrote:
>I heard about 2 concerns from my brother, who knows those who guys who
>work that freq:
>1. Not sure what kind of power they are running but even a small
>dish(say 12") it this freq has an incredibly narrow beamwidth. Would
>take one heck of a tracking mechanism to follow a sat unless it is
>goestationary.
>2. Another problem with this freq is it is right on a water adsorption
>line in the atmosphere. From orbit you won't have of go thru a lot but
>its still there.
>Anyone address these during the design phase of the sats?
>Rob KA2CZU
>
>On Saturday, April 13, 2019, 1:27:18 PM EDT, W3AB/GEO via AMSAT-BB
><amsat-bb@?????.???> wrote:
>
>
>4) Communication Protocols Modulation techniques that will be
>investigated for the high-speed communications experiment include QPSK,
>16-QAM and CPFM. If successful, this technology for wavelengths below
>10 cm will increase the data transfer rates by at least 4 orders of
>magnitude while also decreasing the sizes of antennas and the
>associated spacecraft.
>
>?___
>Sent from my two way wrist watch
>73 de W3AB/GEO?
>
>On Apr 13, 2019, 08:52, at 08:52, Zach Metzinger via AMSAT-BB
><amsat-bb@?????.???> wrote:
>>
>>Posted on anther list by WA5JAT:
>>
>>https://amsat-uk.org/2019/04/12/australian-cubesat-to-use-76-ghz/
>>
>>Uplinks specified on that page, but no data as to if they are purely
>>digital, analog, etc.
>>
>>--- Zach
>>N0ZGO
>>_______________________________________________
>>Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>>to all interested persons worldwide without requiring membership.
>>Opinions expressed
>>are solely those of the author, and do not reflect the official views
>>of AMSAT-NA.
>>Not an AMSAT-NA member? Join now to support the amateur satellite
>>program!
>>Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>_______________________________________________
>Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
>to all interested persons worldwide without requiring membership.
>Opinions expressed
>are solely those of the author, and do not reflect the official views
>of AMSAT-NA.
>Not an AMSAT-NA member? Join now to support the amateur satellite
>program!
>Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 4
Date: Sat, 13 Apr 2019 15:15:55 -0400
From: Mike Seguin <n1jez@?????????????????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] Australian CubeSat to use 76 GHz
Message-ID:
<59d80c84-a31e-9df2-0566-5d457fbaea61@?????????????????.???>
Content-Type: text/plain; charset=utf-8; format=flowed
I have gear to receive the 76 GHz band. I've sent a note to the Cuava
team to ask about TX power, EiRP, antenna etc to get a sense of what it
might take to at least detect the downlink.
Mike
On 4/13/2019 2:53 PM, Zach Metzinger via AMSAT-BB wrote:
> On 04/13/19 12:26, W3AB/GEO wrote:
>> 4) Communication Protocols Modulation techniques that will be
>> investigated for the high-speed communications experiment include
>> QPSK, 16-QAM and CPFM. If successful, this technology for wavelengths
>> below 10 cm will increase the data transfer rates by at least 4 orders
>> of magnitude while also decreasing the sizes of antennas and the
>> associated spacecraft.
>
> Yup, saw that, but it is non-specific as to the interconnect between
> uplink/downlink and the modes that we'll be able to run through it.
>
> I'm looking up how to get 76 GHz going. :-)
>
> --- Zach
> N0ZGO
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
--
73,
Mike, N1JEZ
"A closed mouth gathers no feet"
------------------------------
Message: 5
Date: Sat, 13 Apr 2019 19:33:01 +0000 (UTC)
From: Nitin Muttin <vu3tyg@?????.??.??>
To: amsat-bb@?????.???? <n1jez@?????????????????.???>
Subject: Re: [amsat-bb] Australian CubeSat to use 76 GHz
Message-ID: <1827401292.274357.1555183981551@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Wow, this is a major leap towards these bands.Wonder how the frequency
allocation is for Amateur satellite service at 76 GHz.??
73
Nitin [VU3TYG]
On Saturday, 13 April, 2019, 3:17:34 pm GMT-4, Mike Seguin via AMSAT-BB
<amsat-bb@?????.???> wrote:
I have gear to receive the 76 GHz band. I've sent a note to the Cuava
team to ask about TX power, EiRP, antenna etc to get a sense of what it
might take to at least detect the downlink.
Mike
On 4/13/2019 2:53 PM, Zach Metzinger via AMSAT-BB wrote:
> On 04/13/19 12:26, W3AB/GEO wrote:
>> 4) Communication Protocols Modulation techniques that will be
>> investigated for the high-speed communications experiment include
>> QPSK, 16-QAM and CPFM. If successful, this technology for wavelengths
>> below 10 cm will increase the data transfer rates by at least 4 orders
>> of magnitude while also decreasing the sizes of antennas and the
>> associated spacecraft.
>
> Yup, saw that, but it is non-specific as to the interconnect between
> uplink/downlink and the modes that we'll be able to run through it.
>
> I'm looking up how to get 76 GHz going. :-)
>
> --- Zach
> N0ZGO
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
--
73,
Mike, N1JEZ
"A closed mouth gathers no feet"
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Sat, 13 Apr 2019 19:49:50 +0000 (UTC)
From: Nitin Muttin <vu3tyg@?????.??.??>
To: amsat-bb@?????.???? Hans BX2ABT <hans.bx2abt@???.?????.???>
Subject: Re: [amsat-bb] Max Valier malfunction
Message-ID: <1121012551.2832227.1555184990765@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Sorry to hear this, this satellite had a very strong signal and useful
during demos,I do have? a qsl as well :-)
73
Nitin [VU3TYG]
On Saturday, 13 April, 2019, 10:18:25 am GMT-4, Hans BX2ABT via AMSAT-BB
<amsat-bb@?????.???> wrote:
It seems the Max Valier beacon is malfunctioning. On 145.960 only a very
strong continuous carrier (30 dB above noise level) can be seen and
heard, but no more CW ID + message. A pity, because it was my go-to
beacon to check if my 2 meter antenna contraptions were at least working
a bit.
Luckily I have the QSL card in my collection already.
73 de Hans
BX2ABT
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Sat, 13 Apr 2019 14:41:18 +0100
From: Tom M0LTE <tom@?????.??>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] 15-10m satellite transponders to be launched
Message-ID:
<CAL4ggqvD5b+NU-JGfBK0iwE9L7Kg43yTfQZGC6Q_=8mQC4K8Lw@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
I find myself slightly surprised that solar minimum wouldn?t be the best
time to work 10/15m sats.
With traditionally poor band conditions the ionosphere won?t be reflective-
making it ideal for getting your signal up and down to/from the sat,
through the now-transparent ionosphere. No?
Cheers
Tom
On Fri, 12 Apr 2019 at 18:18, Bob Rossi via AMSAT-BB <amsat-bb@?????.???>
wrote:
> It's too bad we will be in a low sunspot situation for the next few years.
> But who knows what can happen.
> You can read about G3IOR's experiences with OTH propagation RS-12 mode K
> DX operation
> where he was able to work a ZL station, in his article in the Jul/Aug 1993
> issue of the AMSAT Journal
> titled "Using RS-12 Mode "K" Anomalous Propagation".
> I think the higher sunspots played a role with this.
>
> There's also his audio interview about this topic in 2015 at:
> https://criticaldistance.blogspot.com/2015/04/
>
> it's almost at the end of the Radio Luxembourg audio at the top of the
> page.
>
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 8
Date: Sat, 13 Apr 2019 20:39:35 +0800
From: HansFong <hansfong@??????.??>
To: amsat-bb@?????.???
Subject: [amsat-bb] Max Valier malfunction
Message-ID: <dfe07a04-a76d-6ab5-4b78-8d34c25c8d8b@??????.??>
Content-Type: text/plain; charset=utf-8; format=flowed
It seems the Max Valier beacon is malfunctioning. On 145.960 only a very
strong continuous carrier (30 dB above noise level), but no more CW ID +
message. A pity, because it was my go-to beacon to check if my 2 meter
antenna contraptions were at least working a bit.
Luckily I have the QSL card in my collection already.
73 de Hans
BX2ABT
------------------------------
Message: 9
Date: Sat, 13 Apr 2019 09:49:36 -0700
From: Eric Garner <garnere@?????.???>
To: Ken Swaggart <k.swaggart@???????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] G5500 - replacement boom clamps?
Message-ID:
<CABqdsz8SsrqAx9dvQ6guQ-BXdL0y1Rt72wRGZRE4w_W-nyy+vQ@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
DX Engineering appears to have a good selection of clamps and related
hardware:
https://www.dxengineering.com/search/department/clamps-and-fasteners
-Eric KI7LTT
On Sat, Apr 13, 2019 at 9:27 AM Ken Swaggart via AMSAT-BB <
amsat-bb@?????.???> wrote:
> After 17 years in a coastal environment, the G5500 boom clamps are severely
> rusted and need to be replaced. Anyone know of a replacement candidate,
> preferably stainless steel?
>
>
>
> Picture at:
>
>
> https://www.dropbox.com/s/6jxdcwg42z3awew/20190413_rusted%20rotor%20boom%20c
> lamps.jpg?dl=0
>
<https://www.dropbox.com/s/6jxdcwg42z3awew/20190413_rusted%20rotor%20boom%20cl
amps.jpg?dl=0>
>
>
>
> Tnx,
>
> Ken, W7KKE
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
--
--Eric
_________________________________________
Eric Garner
------------------------------
Message: 10
Date: Sat, 13 Apr 2019 12:09:44 -0800
From: Gabriel Zeifman <gabrielzeifman@?????.???>
To: Hans BX2ABT <hans.bx2abt@???.?????.???>
Cc: amsat-bb@?????.???
Subject: Re: [amsat-bb] Max Valier malfunction
Message-ID:
<CAEGYLCvz2DrktcwAxxub63+StMArTm0fTXKs-yoUfzNq7eL_Mg@????.?????.???>
Content-Type: text/plain; charset="UTF-8"
What a pity that there will be less meaningless QRM to interrupt
communications through AO-91. Max Valier Sat really lived up to its owners?
expectation of a ?100 year? service life, with a beacon that in their
infinite wisdom, could not be turned off by ground command, only by a
completely unforeseeable and very unfortunate failure.
73,
Gabe
AL6D/VE6NJH
#excitedforbeepboopsats
On Sat, Apr 13, 2019 at 6:17 AM Hans BX2ABT via AMSAT-BB <amsat-bb@?????.???>
wrote:
> It seems the Max Valier beacon is malfunctioning. On 145.960 only a very
> strong continuous carrier (30 dB above noise level) can be seen and
> heard, but no more CW ID + message. A pity, because it was my go-to
> beacon to check if my 2 meter antenna contraptions were at least working
> a bit.
>
> Luckily I have the QSL card in my collection already.
>
> 73 de Hans
>
> BX2ABT
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 11
Date: Sat, 13 Apr 2019 20:20:01 +0000 (UTC)
From: GEO Badger <w3ab@?????.???>
To: amsat-bb@?????.???
Subject: Re: [amsat-bb] G5500 - replacement boom clamps?
Message-ID: <907739408.585447.1555186801783@????.?????.???>
Content-Type: text/plain; charset=UTF-8
Alas, that is not true. Yes, 99.99% of all the fasteners on a current
vehicle are metric. Modern vehicles don't use muffler clamps, aka exhaust
clamps. Those are still the realm of DIY mechanics and hot-rodders, and they
are still use imperial dimensions with the threads normally USS, not SAE.
McMaster-Carr, showing the metric equivalent of the imperial size, and
metric threaded clamps.https://www.mcmaster.com/muffler-clamps
If one has any connection(s) into the metric world you can have them shipped
to you. If you NEED to procure metric clamps, let Dr Google do your walking
for you.---?
Ciao baby, catch you on the flip side. ??
GEO ???
http://www.w3ab.org
Time flies like an arrow, fruit flies like a banana.
On Saturday, April 13, 2019, 10:58:54 AM PDT, Roy Dean via AMSAT-BB
<amsat-bb@?????.???> wrote:
>
> The U clamps are metric. That said one can probably find an approximate
> fit at an industrial supply house like McMaster-Carr.
Well, the entire automotive industry is metric (even what's left of "the
big three"), so this shouldn't eliminate the possibility of using exhaust
clamps.
--Roy
K3RLD
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Sat, 13 Apr 2019 20:23:13 +0000 (UTC)
From: GEO Badger <w3ab@?????.???>
To: "amsat-bb@?????.???? <amsat-bb@?????.???>
Subject: Re: [amsat-bb] 15-10m satellite transponders to be launched
Message-ID: <318132441.823794.1555186993494@????.?????.???>
Content-Type: text/plain; charset=UTF-8
One would think so. You don't normally rely on propagation to communicate
via satellite.
---?
Ciao baby, catch you on the flip side. ??
GEO ???
http://www.w3ab.org
Time flies like an arrow, fruit flies like a banana.
On Saturday, April 13, 2019, 1:21:38 PM PDT, Tom M0LTE via AMSAT-BB
<amsat-bb@?????.???> wrote:
I find myself slightly surprised that solar minimum wouldn?t be the best
time to work 10/15m sats.
With traditionally poor band conditions the ionosphere won?t be reflective-
making it ideal for getting your signal up and down to/from the sat,
through the now-transparent ionosphere. No?
Cheers
Tom
On Fri, 12 Apr 2019 at 18:18, Bob Rossi via AMSAT-BB <amsat-bb@?????.???>
wrote:
> It's too bad we will be in a low sunspot situation for the next few years.
> But who knows what can happen.
> You can read about G3IOR's experiences with OTH propagation RS-12 mode K
> DX operation
> where he was able to work a ZL station, in his article in the Jul/Aug 1993
> issue of the AMSAT Journal
> titled "Using RS-12 Mode "K" Anomalous Propagation".
> I think the higher sunspots played a role with this.
>
> There's also his audio interview about this topic in 2015 at:
> https://criticaldistance.blogspot.com/2015/04/
>
> it's almost at the end of the Radio Luxembourg audio at the top of the
> page.
>
>
> _______________________________________________
> Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
>
_______________________________________________
Sent via AMSAT-BB@?????.???. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@?????.???.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
https://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 14, Issue 143
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