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CX2SA > SATDIG 18.03.09 06:16l 468 Lines 12354 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V4 131
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
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Today's Topics:
1. Re: old satellites / Moon (MM)
2. Re: iss packet invalid callsign nnnnnn
(Ransom, Kenneth G. (JSC-OC)[BARRIOS TECHNOLOGY])
3. Re: AMSAT-BB Digest, Vol 4, Issue 129 (Louis McFadin)
4. Re: old satellites (w7lrd@xxxxxxx.xxxx
5. Re: old satellites (G0MRF@xxx.xxxx
6. Re: old satellites (David - KG4ZLB)
----------------------------------------------------------------------
Message: 1
Date: Tue, 17 Mar 2009 11:03:03 -0700 (PDT)
From: MM <ka1rrw@xxxxx.xxx>
Subject: [amsat-bb] Re: old satellites / Moon
To: Hans Johnson <hans.johnson@xxxxx.xxx>, kg4zlb@xxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <572791.16821.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
It is possible to piggyback on a commercial satellite.
The Russians did it with several successful RS amateur radio satellites.
The Amateur radio satellite community should try to focus more in Piggyback
satellite rides for our future satellites. We should avoid the stuff we that
we do not know how to build such as rocket motors and stability systems. And
focus on what we do best and that is build ?Simple / KISS? transponders.
If there is a well-funded university out here interested in going to the Moon,
we can piggyback an amateur radio project on one of the new Moon landers that
NASA is planing on flying. Let NASA do the hard stuff and we should focus on
a simple mode b/j transponders.
Who wants to go to the Moon?
Miles WF1F Marexmg.org
--- On Tue, 3/17/09, David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx> wrote:
> From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
> Subject: [amsat-bb] Re: old satellites
> To: "Hans Johnson" <hans.johnson@xxxxx.xxx>
> Cc: amsat-bb@xxxxx.xxx
> Date: Tuesday, March 17, 2009, 1:28 PM
> I was reading about the newly launched GOCE satellite and
> the fact that
> its mission will end when its 40kg tank empties - that of
> course may be
> a long time coming but as it has an S band transmitter,
> could this not
> be tweaked for us once the mission is complete?
>
> And thinking further, for these satellites could amateur
> radio gear be
> carried so that it could be activated once the main mission
> is complete?
> Doing this over a number of years would provide a ready
> made supply of
> new birds over a period of time.
>
> I suppose logistics and cost will be the factor but its an
> idea and
> would give us at least something!
>
> --
> David
> KG4ZLB
> www.kg4zlb.com
>
>
>
> Hans Johnson wrote:
> > Furthermore, from what I understand, international
> agreements (or at least
> > implicit agreements) now require the operators to vent
> any remaining fuel.
> > This is to prevent the satellite from exploding at
> some point in the future
> > due to either the (rather caustic) fuel corroding
> through the fuel tank, or
> > a debris/micrometeorite hit.
> >
> > Once this is complete, the operators will then
> permanently shut down the
> > satellite so that there is no chance of it interfering
> with the operational
> > fleet. The last thing they want is a semi-active
> satellite drifting past an
> > operational satellite (at least from the POV of the
> earth station) and
> > potentially confusing tracking antennas, or otherwise
> interfering with
> > revenue traffic.
> >
> > As far as shifting them to amateur frequencies, I
> doubt it's physically
> > possible. In order to get the Tx/Rx isolation they
> need, the satellites
> > will be using cavity filters, so unless you're
> very close to their passband,
> > there's no hope. Heck, in my day job, we have to
> use different filters if
> > we want to operate in extended ku-band filters.
> >
> > Regards,
> >
> > Hans Johnson
> > VA7HAS
> >
> > On Thu, Mar 12, 2009 at 3:52 PM, Wayne Estes
> <w9ae@xxxxxxx.xxx> wrote:
> >
> >
> >
> >
> >
> >
>
> _______________________________________________
> 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, 17 Mar 2009 13:04:14 -0500
From: "Ransom, Kenneth G. (JSC-OC)[BARRIOS TECHNOLOGY]"
<kenneth.g.ransom@xxxx.xxx>
Subject: [amsat-bb] Re: iss packet invalid callsign nnnnnn
To: Mr Jeffrey L Ross <radiooperator@xxxxxxx.xxx>, amsat
<amsat-bb@xxxxx.xxx>
Message-ID:
<CBB2346C58D9B14983E5AEFE4B34588631831CF9EE@xxxxxxxxx.xxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Can't address the "nnnnnn" callsign issue but the ISS, ISS-5 and ISS-10 are
plot points for the ISS on the www.ariss.net map and not packet callsigns. ISS
is the current position, ISS-5 is where the ISS will be in 5 minutes and ISS-
10 is where the ISS will be in 10 minutes based on the last refresh of the
page. RS0ISS-1,-2,-3,-4,-5 and -11 are various ISS packet callsigns but using
the alias ARISS works for all of the digi callsigns.
Kenneth - N5VHO
________________________________________
From: amsat-bb-bounces@xxxxx.xxx [amsat-bb-bounces@xxxxx.xxxx On Behalf Of Mr
Jeffrey L Ross [radiooperator@xxxxxxx.xxxx
Sent: Tuesday, March 17, 2009 12:47 PM
To: amsat
Subject: [amsat-bb] iss packet invalid callsign nnnnnn
hi folks, just looking at the iss mheard callsign list I see one called
nnnnnnn. Does anyone know what or who this is? maybe just a silly error, or
maybe someone is using the iss without a call. we hams police our own if I'm
not mistaken. anyway why its here to observe and go over hows about some
explaining to us why there are serveral calls for the iss. I see in the
list, ISS, ISS-10,ISS-5, RSOISS-4, -4 I Think is the heard digi, but always
wondering what the other iss calls are. If anyone knows please post, thank
you much, kc8gkf-5 UISS User.
attached is the isscallsign heard list
------------------------------
Message: 3
Date: Tue, 17 Mar 2009 14:31:23 -0400
From: Louis McFadin <w5did@xxx.xxx>
Subject: [amsat-bb] Re: AMSAT-BB Digest, Vol 4, Issue 129
To: amsat-bb@xxxxx.xxx
Message-ID: <FE5036D9-F6B8-4B09-B83A-33791ECD4C44@xxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed
There is no DCI filter in line with the ISS amateur radio system.
On Mar 17, 2009, at 11:51 AM, amsat-bb-request@xxxxx.xxx wrote:
>
Lou McFadin
W5DID
ARISS US Hardware manager
------------------------------
Message: 4
Date: Tue, 17 Mar 2009 18:39:01 +0000 (UTC)
From: w7lrd@xxxxxxx.xxx
Subject: [amsat-bb] Re: old satellites
To: kg4zlb@xxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<1005756067.7022931237315141250.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx
.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
clever thinking Dave. There some "experts" on this BB that know the answer
73 Bob W7LRD
----- Original Message -----
From: David - KG4ZLB
To: Hans Johnson
Cc: amsat-bb@xxxxx.xxx
Sent: Tue, 17 Mar 2009 17:28:00 +0000 (UTC)
Subject: [amsat-bb] Re: old satellites
I was reading about the newly launched GOCE satellite and the fact that
its mission will end when its 40kg tank empties - that of course may be
a long time coming but as it has an S band transmitter, could this not
be tweaked for us once the mission is complete?
And thinking further, for these satellites could amateur radio gear be
carried so that it could be activated once the main mission is complete?
Doing this over a number of years would provide a ready made supply of
new birds over a period of time.
I suppose logistics and cost will be the factor but its an idea and
would give us at least something!
--
David
KG4ZLB
www.kg4zlb.com
Hans Johnson wrote:
> Furthermore, from what I understand, international agreements (or at least
> implicit agreements) now require the operators to vent any remaining fuel.
> This is to prevent the satellite from exploding at some point in the future
> due to either the (rather caustic) fuel corroding through the fuel tank, or
> a debris/micrometeorite hit.
>
> Once this is complete, the operators will then permanently shut down the
> satellite so that there is no chance of it interfering with the operational
> fleet. The last thing they want is a semi-active satellite drifting past an
> operational satellite (at least from the POV of the earth station) and
> potentially confusing tracking antennas, or otherwise interfering with
> revenue traffic.
>
> As far as shifting them to amateur frequencies, I doubt it's physically
> possible. In order to get the Tx/Rx isolation they need, the satellites
> will be using cavity filters, so unless you're very close to their passband,
> there's no hope. Heck, in my day job, we have to use different filters if
> we want to operate in extended ku-band filters.
>
> Regards,
>
> Hans Johnson
> VA7HAS
>
> On Thu, Mar 12, 2009 at 3:52 PM, Wayne Estes wrote:
>
>
>
>
>
>
_______________________________________________
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: 5
Date: Tue, 17 Mar 2009 14:43:14 EDT
From: G0MRF@xxx.xxx
Subject: [amsat-bb] Re: old satellites
To: kg4zlb@xxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <bdd.47db7f5a.36f14942@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
In a message dated 17/03/2009 17:29:47 GMT Standard Time,
kg4zlb@xxxxxxxxxx.xxx writes:
>I was reading about the newly launched GOCE satellite and the fact that
>its mission will end when its 40kg tank empties - that of course may be
>a long time coming but as it has an S band transmitter, could this not
>be tweaked for us once the mission is complete?
Hi.
ESA will use the usual 2G / 2.2G ish space communications band for GOCE.
The modulation format and data rate will be very different from anything that
we are familiar with. The uplink will send commands to the spacecraft and the
downlink will send back science data but It's highly unlikely that signals
can pass through or that the TX and RX can be moved to 2.4 GHz.
>And thinking further, for these satellites could amateur radio gear be
>carried so that it could be activated once the main mission is complete?
>Doing this over a number of years would provide a ready made supply of
>new birds over a period of time.
This however is a very practical idea. Right now AMSAT members are building
/ designing a communications system that will be launched on the ESA
educational satellite ESEO.
When the science mission is over it will switch to amateur use and hopefully
provide a good service for many years (touching wood for good luck as I
write this)
ESEO is planned to be 75kg going to LEO.
73
David
------------------------------
Message: 6
Date: Tue, 17 Mar 2009 14:50:32 -0400
From: David - KG4ZLB <kg4zlb@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: old satellites
To: G0MRF@xxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <49BFF0F8.8000302@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
And that is very good but DO-64 had the same premise. Just need a lot
more if these!
73
David
G0MRF@xxx.xxx wrote:
> Right now AMSAT members are building / designing a communications
> system that will be launched on the ESA educational satellite ESEO.
> When the science mission is over it will switch to amateur use and
> hopefully provide a good service for many years (touching wood for
> good luck as I write this)
>
------------------------------
_______________________________________________
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 4, Issue 131
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