[Battlemesh] Questions for a weather radar specialist?

[Albert Rafetseder]

> The ones we had interfere with the local radar here were just standard
> UBNT equipment with their stock firmware. I assume OP ( Albert ) had
> the same as he mentioned UBNT.

I don't operate the node, but I've been told that it runs stock Ubiquiti
AirOS 6.2.0.

FunkFeuer has had DFS issues with Ubiquiti before, and their release
notes for new AirOS versions regularly mention fixes to their DFS
implementation, e.g.
https://community.ui.com/rss/releases/airOS/c3d7ca26-e82d-4729-8a87-73eedf164a16
.

Re your first reply:

>>> The confusing part is: We are using DFS compatible equipment and are
>>> at proper power levels; but it appears not to work.

Then I think it's not your fault (assuming you keep the firmware
up-to-date.)

>>> Moreover it's a
>>> bit hard to tell what we're supposed to do: not use those frequencies
>>> at all, or use them carefully? It kindof seems like the former ( not
>>> at all ) within 35km of the radar.

If you know and can afford to avoid the frequencies, that's the safest
solution. For Europe, our contact showed us this map of radar locations
and frequencies:
https://www.eumetnet.eu/wp-content/themes/aeron-child/observations-programme/current-activities/opera/database/OPERA_Database/index.html

You can check with heywhatsthat.com whether a radar is in line-of-sight
to your deployment.

>>> I'd be curious what the experts have to say about compatible equipment
>>> and the failure of them;

That's an excellent question. From what I learned, they can only report
interference to the radio authority, who then tries to find the person
operating the problematic station and make sure that their config is
fine -- correct regulatory domain, DFS on, sane TX powers, all that.

However, there doesn't seem to be a channel from the radio authority to
the equipment manufacturers if the problem lies in the hardware or firmware.

>>> 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:




>>> (I'll add to the Pad, just thought I'd throw in some words )
>>