What sort of antenna do you have? If your link distance is pushing the limits of your
hardware, a tiny amount of thermal expansion could potentially reduce the signal past the
operating threshold. Unlikely, but possible.
Alternatively, could there be other equipment nearby which becomes more active on sunny
days? Some sort of secondary effect?
From: "Andrew McGhie" <andrew.mcghie(a)ncc.govt.nz>
To: "Michael Davies" <michael(a)hereisasite.co.nz>nz>;
Sent: 1/08/06 4:00 p.m.
Subject: Re: [nznog] Wireless link adversly affected by the sun?
I don't know how relevant it is but the military have known for a while
that sun spots (flares) will affect radio trasnmissions.
From: Michael Davies [mailto:firstname.lastname@example.org]
Sent: Tuesday, 1 August 2006 3:48 p.m.
Subject: [nznog] Wireless link adversly affected by the sun?
As the subject suggests, I've been noticing an interesting problem with
our internet. We're lucky enough to be on the receiving end of a
wireless net connection running through Trango broadband hardware,
fairly conventional wireless tech. However I've noticed through
monitoring the connection with smokeping to various places around the
country that the connection quality seems to decrease dramatically
through the middle of the day, but not every day. At first I thought
that this was simply related to congestion somewhere, but from following
the weather a bit I've started noticing that it gets worse on the nice
For example: Today, a balmy 17 degrees in Dunedin and beautifully sunny
all day. Packet loss and jitter begins to increase at about 9am and
peaks about 1pm with 60% loss, then at 2pm as if flicking a switch it
returns to nearly 0% loss. From looking at the graphs over time, this
does happen quite often but not every day and the loss today is
definitely the worst I've seen it (but also the warmest/sunniest day
we've had in Dunedin for quite a while).
Has anyone seen or heard of this happening before? Would there be any
way to prevent this - supposing that the sun is the culprit - short of
installing a Mr. Burns type sun shield?
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