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



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
>
>


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