hello! experience with 802.11x and extreme humidity?

[Martijn van Oosterhout]

Ok, I don't have any real figures but from what I remember it should be too
bad. We had a wireless link stretching about 1km without LOS. The signal
level tended to vary by day or night by one or two points and when it rained
it dropped by 3 or 4. We didn't compensate for effects like heat causing
tuners to change frequency (slightly), heat expansion changing the joints or
the fact that higher wind tended to move the antenna around a bit.

Someone actually explianed it once on this list. Something like, yes, water
absorbes 2.4GHz really well, but water droplets or mist don't really count.
But rain landing on trees that happen to be in the way have a larger effect,

I don't remember exactly but as long as we had a reasonable clearance on the
signal level during the daytime, rain presented no problem. I don't recall
the effect of actual mist, but I don't think it mattered too much.

However, if you get *any* water into *any* of your cables, your signal will
be *severely* affected. So if it works fine until it rains once, that's your
problem.

Don't know about 5.6GHz.

Hope this helps,

On Sat, Oct 12, 2002 at 04:54:23PM +0200, Armin Roehrl wrote:
> Hello all,
> 
> 	I subscribed to this Australian list hoping that 
> s.b. here has experience how 802.11x performs
> under extreme humidity (fog, rain).
> 
> 2.4 GHz is a resonance frequency of water -- so
> I assume the receiving quality to go down with
> humidity.
> 
> What about 5.6GHz?
> 
> Does anybody have concrete numbers to share?
> 
> I think the potential temperatures would be between 
> 18C to 35C and I expect up to 80% humidity.
> 
> Thx & thank you very much for any experience you can share.
> -A.
> 
> -----------------------------------------------
> Armin Roehrl, http://www.approximity.com
> Training, Development and Mentoring
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> 
> I can't understand why people are frightened of new ideas.
> I'm frightened of the old ones.
> -- John Cage
> 
> 

-- 
Martijn van Oosterhout   <kleptog at svana.org>   http://svana.org/kleptog/
> There are 10 kinds of people in the world, those that can do binary
> arithmetic and those that can't.