[Battlemesh] Questions for a weather radar specialist?

[Matthieu Herrb]

On Sun, Nov 03, 2019 at 08:41:49AM -0500, Zachary Giles wrote:
> Thanks for some responses.
> 
> Just as a couple of points:
> - AirOs 6 is way old, they're up to v8.6 so the interface and options
> are all different. You actually can't turn off DFS anymore and only in
> certain cases there are frequency lists.
> - My experience with them coming to our site is that they don't try to
> make sure we're using sane configs ( correct reg, DFS on, TX Power ).
> They just say this thing is interfering, turn it off.
> - What we're done is as you said, don't use the freqs, just change
> everything off that section of the DFS range.
> 
> I'm not so much looking for advise and "what to do"; Rather, since
> there's a radar expert coming to your site, I think it would be
> interesting if there were discussions about how to make DFS radios
> work better, or stories of common problems where DFS didnt work, and
> maybe advise about if we all should even try to use DFS in areas we
> know have airports. :)
> 
> Looking forward to the discussion.

Here in Toulouse we do "manual" DFS. We manually select the frequency
for all our APs, and explicitely avoid the frequency of the local
weather radar (5625MHz) and its neighbours (from 5600 to 5650MHz) to
be on the safe zone. We have DFS activated though (so in theory it
could detect interferences on the selected channel and hop to another
one, potentially the radar one), but never saw a problem.

Any ways we are also since the beginning in contact with the operator
of the radar and the french agency regulating frequencies usage (ANFR
- Agence Nationale des Frequences Radio). They are contacting us
whenever they detect a problem to make sure it's not us, and it never
was us so far.

We figured out that this is also a domain where human relations are
important and being known and transparent on our activities helps
beeing accepted.




> -Zach
> 
> On Sat, Nov 2, 2019 at 7:22 PM Albert Rafetseder
> <albert.rafetseder+v10 at univie.ac.at> wrote:
> >
> > (Apologies, I hit Send too early.)
> >
> > >>> I'd also be curious to hear about how to make
> > >>> various brands ( like Ubnt ) not even try those channels if we really
> > >>> aren't supposed to use them.
> >
> > Looks like AirOS lets you list the frequencies it should use:
> >
> > https://img.community.ui.com/34f36c9f-7fa0-43da-a752-70ff89a39e8f/answers/ce6eaf34-296f-46fe-81af-56f0123e7f2a/0019ac80-d307-4003-888f-4088267b50f0
> >
> > >>> (I'll add to the Pad, just thought I'd throw in some words )
> >
> > Much appreciated, please do!
> >
> > Best,
> >   Albert.
> 
> 
> 
> -- 
> Zach Giles
> zgiles at gmail.com
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-- 
Matthieu Herrb