[aprssig] HF noise measuring campaign reports via APRS

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Sun Sep 16 14:53:53 EDT 2012

I agree that the standard APRS telemetry is definitely the preferable 
approach, but since your example packet (below) showed 8 floating point 
values of apparently some level of precision, I didn't suggest a format 
that only supports 5 values ranging from 0 to 255 (per spec, but some 
say 0..999) that can be scaled based on defined parametric equation 


Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 9/14/2012 4:40 PM, Chris Moulding wrote:
> Hessu,
> Thanks for the information about the telemetry packets. That looks 
> ideal especially when it displays in aprs.fi so well without any 
> software changes at your end!
> At the moment we are looking at three frequencies but with five 
> telemetry channels available it might make sense to go with five 
> frequencies from the start.
> 73,
> Chris, G4HYG
>> If there's at most 5 frequencies monitored by a given station, you could
>> transmit it as standard APRS telemetry, and it would be graphed
>> automatically by all APRS receiving stations without any code changes in
>> the receiving end. Like this:
>> http://aprs.fi/telemetry/a/OH7LZB-14
>> You can also transmit channel names for each graph.
>>    - Hessu
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