[AusNOG] Smoke and radio performance
paulwilkins369 at gmail.com
Wed Dec 11 09:49:33 EST 2019
I imagine the effects are too chaotic to allow anything resembling sensible
data modelling, other than big fires cause greater signal loss over wider
areas than smaller fires (my consulting cheque is in the mail).
However I doubt the effects of fire could be anywhere near the impact or
frequency of a solid downpour, so signal loss will be within expected power
On Tue, 10 Dec 2019 at 17:22, Matt Perkins <matt at spectrum.com.au> wrote:
> Assume your talking LIPD band stuff with low power. I’m sure there is
> increased attention on the path due to scatter and Increased cross channel
> interference from same. But most commercial licensed systems should have
> sufficiently budged in there power budgets for that. We have see only
> minimum increase in BER even up in mm wave systems.
> Believe it or not the biggest issues with summer the threat to fixed
> wireless NBN is a thing called tropospheric ducting which often effects NBN
> in Tasmania from southern Victoria. Normally microwave does not go beyond
> the horizon however with specific summer atmospheric conditions systems
> from VHF right up to about 4 ghz can bounce there way where they were not
> planned to be. It caused a massive NBN outage last year and I’m sure will
> again this year.
> /* Matt Perkins
> Direct 1300 137 379 Spectrum Networks Ptd. Ltd.
> Office 1300 133 299 matt at spectrum.com.au
> Fax 1300 133 255 Level 6, 350 George Street Sydney 2000
> SIP 1300137379 at sip.spectrum.com.au
> Google Talk MattAPerkins at gmail.com
> PGP/GNUPG Public Key can be found at http://pgp.mit.edu
> > On 10 Dec 2019, at 10:15 am, Narelle Clark <narellec at gmail.com> wrote:
> > Folks
> > Does anyone have any real world measurement data on the performance
> impact from the bushfire smoke on point to point radio throughput?
> > We're seeing a hit on a 5GHz system over the last week or so which seems
> awfully coincidental...
> > Narelle
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