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Re: The need for telemetry data -or what happened toFO-29-



 Gentlemans,

 all these about TLM-capturing are good & rights,
and yes, it's a reality for the birds like PACSAT,
ANDE etc. as they already have AX.25.

 But, at my opinion, the Analogue-Birds is other
story. They have a different category of users.
 They are interesting mainly for QSOs, firstly. 
So, it's definitely a "bore job" for this kind of
peoples to capture the TLM, when at the same time they
can do "exciting" QSOs through the Satellite.

  On the other hand a "stand-alone"
TLM-capturing-system needs a second RX,
fully-controlled by software for auto
Doppler-correction and Tracking. That is no so easy
for an amateur operator, which is firstly aimed to
make QSOs through analogue birds.
  Definitely he needs much more complicate and
expensive Shack, in order to be able to cover this
requirements.
 
 Another point of view is that, for example: 
FO-29 was in good-shape for about 10 years. Well, can
you tell me how many they will spend money for a
second receiver + necessary equipments for
TLM-capturing, if they know that the captured-files
are useful just for 1-2 times per 10 years, under like
FO-29's malfunction?

 Closing, I would like to say again, I'm not negative
to this idea. Just I'm a little-bit skeptic about
the possibilities right-now on Analogue-Birds.
 May be in the far future is easier and much more
effective due to the new, better & more flexible
equipments (ie SDR), but for now and the short future,
I wondering. 

 Have a nice month

73, Mak SV1BSX


--- Rob Hardenberg <rob@itr-datanet.com> wrote:

> Stefan,
> 
> This system is working for any unproto packet
> satellite. I'am feeding all my received packets to
> the aprs2 network. This way anyone connected can see
> the received telemetry.
> See the libertad cubesat:
>
http://www.db0anf.de/hamweb/aprsdb/showdata.php?cfrom=5k3l
> 
> It would be nice when more radio amateur would do
> this
> 
> 73 Rob PE1ITR.
> 
> 
> Stefan Wagener schreef:
> > Thanks Bob.
> >
> > Point well made for the PCsats.
> >
> > Question: Are you proposing that all future
> satellites should send telemetry
> > on the APRS frequency to make this system work?
> >
> > Stefan
> >
> >
> >>From: "Robert Bruninga" <bruninga@usna.edu>
> >>Reply-To: <bruninga@usna.edu>
> >>To: "'Stefan Wagener'"
> <stefan_wagener@hotmail.com>, <amsat-bb@amsat.org>
> >>Subject: RE: [amsat-bb] The need for telemetry
> data -or what happened to
> >>FO-29-
> >>Date: Tue, 1 May 2007 11:03:55 -0400
> >>
> >> > ...One key component of failure analysis is the
> >> > availability of data, especially telemetry.
> >> >
> >> > My question is, can the satellite user
> community at
> >> > large come up with a system that allows the
> routine
> >> > capturing of satellite telemetry? Is there a
> >> > role that AMSAT can play? What would it take?
> >>
> >>All of the APRS satellites (PCSAT-1, PCSAT2, ANDE
> and RAFT) use
> >>AX.25 and beacon their telemetry around the world.
>  Any
> >>telemetry packets, heard by any station that is on
> the internet,
> >>feeds the packets live into the global APRS
> internet.  Not only
> >>does this make it available to anyone at any time,
> but the data
> >>is also archived and is available in graphical
> form over any
> >>date period.
> >>
> >>For example, Simple URL's can be constructed to
> access and plot
> >>any of the telemetry parameters.  See this WEB
> page:
> >>
> >>http://www.ew.usna.edu/~bruninga/andeTemps.html
> >>
> >>And look at the source code.  You will see that
> each plot is
> >>simply a
> >>URL constructed to access the correct period of
> data, and to
> >>select the range of values and the labels.  This
> way, this data
> >>can be incorporated into any application. Thanks
> to the work fof
> >>K4HG, Steve Dimese and the FINDU system.
> >>
> >>This is all hands-off, fully automated, and
> routine.  Not only
> >>does it work for the satellites, but it can also
> plot all of
> >>this same data for ANY KPC-3+ TNC that is sending
> periodic
> >>telemetry packets anywhere in the world on any
> APRS frequency.
> >>For example, this simple URL will plot the
> telemetry for ANY
> >>KPC-3+ TNC on the air.  This one is my local
> digipeater:
> >>
>
>>http://www.findu.com/cgi-bin/tele2.cgi?call=wb4apr-1&last=240
> >>
> >>Just change the ULR callsign to your TNC's
> callsign (if it is
> >>tramnsmitting its 5 channel telemetry beacons on
> any APRS
> >>frequency) and you will see it show up here.  This
> is a
> >>fantastic system for quick-and-dirty experiments,
> since the
> >>global collection and plotting is already done.
> >>
> >>Bob, WB4APR
> >>
> >>
> >
> >
> > _______________________________________________
> > Sent via AMSAT-BB@amsat.org. Opinions expressed
> are those of the author.
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> >
> 
> 
> 73 Rob PE1ITR
> http://www.pe1itr.com
> 
> _______________________________________________
> Sent via AMSAT-BB@amsat.org. Opinions expressed are
> those of the author.
> Not an AMSAT-NA member? Join now to support the
> amateur satellite program!
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> 


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