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[aprssig] APRS Telemetry Parameters

Dave B dave at g8kbv.demon.co.uk
Tue Nov 27 12:31:10 UTC 2012


Can't get near that APRS101.pdf doc, all our AV/antimalware screams at 
me, and blocks downloads of PDF's from that site!   Odd...  (Unless 
something has got in to that file?)

But get the overall drift of what is needed it from your summary.
"value = A x v^2 + B x v + C" where 'v' is the value sent in the 
telemetry packet.

Perhaps that info could go in the document too, to be complete, with 
perhaps a reference link to the APRS101 document.

Regards.

Dave G0WBX.

On 26 Nov 2012 at 17:38, J T wrote:

> 
> Those are the standard APRS telemetry coefficients. Refer to page 70
> of the APRS spec:
> ftp://ftp.tapr.org/aprssig/aprsspec/spec/aprs101/APRS101.pdf
> 
> To summarize: the value = A x v^2 + B x v + C, where 'v' is the value
> sent in the telemetry packet (packet type T).
> 
> --- On Mon, 11/26/12, Dave B <dave at g8kbv.demon.co.uk> wrote:
> > http://aprstw.blandranch.net/Telemetry%20Parameters.pdf
> 
> Hi.
> 
> What do the figures in the EQNS columns relate to? Multipliers, 
> divisors, dB corrections, or ???
> 
> Nice to have all that in one place, but more info needed please as to
> how to use that info, WRT data received off air, to get the value
> monitored, however that is done.
> 
> 
> 






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