[TowerTalk] 1 or 2 dB

[Lux, Jim]

On 5/19/22 6:35 AM, Charles Gallo (KG2V) wrote:
> On 2022-05-19 09:23, Lux, Jim wrote:
> <snip>
>> I'm not so sure that it's out of reach. yes, trying to implement it
>> with gear from 1980 would be challenging. But with more modern
>> equipment, where the "radio" is a black box controlled by a "front
>> panel" or "computer" it gets easier.
>>
> <snip>
>
> The answer to this type of problem (lots of confounding variables) is 
> not really to go too nuts controlling things you can't control 
> (propagation) but to collect LOTS of data, across various sites, and 
> ERP levels, and then throw "Big Data" techniques at it.  You'd fairly 
> quickly discover what a dB of ERP is worth (and probably, if the data 
> was kept right "I heard him but could not work him" what a dB of RCV 
> is worth

The challenge is collecting EIRP levels.  Receive levels are easy. And 
with something like skimmer, you could probably assume that any given 
callsign over  short time isn't changing their TX power (but they could 
be pointing their beam somewhere else).



>
> I'd bet that we could even do this with skimmer and beacon networks, 
> IF we knew/know what various stations were outputting at various 
> times.  The statistical analysis could clean out the rapid propagation 
> differences
>