[AusNOG] Smoke and radio performance

[Terry Manderson]

Just a thought, a presentation at AusNOG 2020 on the smoke topic (attenuation, observations, impacts, adjustments, fire systems) along with other bushfire issues might be interesting. Keep it in mind??

Cheers,
Terry

Mobile device. All correct spelling unintentional.

> On 10 Dec 2019, at 13:18, Robert Hudson <hudrob at gmail.com> wrote:
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> Semi-related - a building near my work's internal smoke detection triggered earlier today, calling the fire department.
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> And I've seen two reports of smoke detection systems in DCs giving false alarms.
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> Apparently this morning from the North pylon on the Sydney Harbour Bridge, the CBD buildings were not visible through the smoke.
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> Also really fun for people with respiratory issues (my kids are asthmatic, one has been to hospital several times with it).
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> Fun times. Cool and normal, apparently, thoughts and prayers will fix it, and water restrictions will apparently solve the lack of water (if you believe NSW Govt radio advertising).
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>> On Tue, 10 Dec. 2019, 1:17 pm Nathan Brookfield, <Nathan.Brookfield at simtronic.com.au> wrote:
>> At the moment in Sydney, visibility is less than a km in some parts, it’s ridiculous!
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>> Kindest Regards,
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>> Nathan Brookfield (VK2NAB)
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>> Chief Executive Officer
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>> Simtronic Technologies Pty Ltd
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>> Web: http://www.simtronic.com.au | E-mail: nathan.brookfield at simtronic.com.au
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>> From: AusNOG <ausnog-bounces at lists.ausnog.net> On Behalf Of Steven Waite
>> Sent: Tuesday, December 10, 2019 12:49 PM
>> To: John England <john at bitwave.com.au>; Narelle Clark <narellec at gmail.com>; ausnog at ausnog.net <ausnog at lists.ausnog.net>
>> Subject: Re: [AusNOG] Smoke and radio performance
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>> We are seeing a similar thing. We have taken that into account within our fade margin. Only seeing 2-3dbm difference on the one or two 5ghz links we have. We have notice more of a hit on the 18ghz links but it only seems to be at night. I think its more related with humidity and temperature inversions added with smoke worse then last year. Noise floor has not changed.
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>> From: AusNOG <ausnog-bounces at lists.ausnog.net> On Behalf Of John England
>> Sent: Tuesday, 10 December 2019 10:27 AM
>> To: Narelle Clark <narellec at gmail.com>; ausnog at ausnog.net <ausnog at lists.ausnog.net>
>> Subject: Re: [AusNOG] Smoke and radio performance
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>> Nothing too substantial during the day on any of our 5GHz, 24GHz or 80GHz links. Plenty of early AM thermal ducting events that seem worse than usual on 5GHz. Not sure how bad the smoke is there, but our visibility was down to ~4km at the worst.
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>> Cheers.
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>> John England
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>> From: AusNOG <ausnog-bounces at lists.ausnog.net> On Behalf Of Narelle Clark
>> Sent: Tuesday, 10 December 2019 11:14 AM
>> To: ausnog at ausnog.net <ausnog at lists.ausnog.net>
>> Subject: [AusNOG] Smoke and radio performance
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>> Folks
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>> Does anyone have any real world measurement data on the performance impact from the bushfire smoke on point to point radio throughput?
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>> We're seeing a hit on a 5GHz system over the last week or so which seems awfully coincidental...
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>> Narelle 
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