<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">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??<div><br><div dir="ltr"><div>Cheers,</div><div>Terry</div><div><br></div>Mobile device. All<span class="Apple-style-span" style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); "> correct spelling unintentional.</span></div><div dir="ltr"><br><blockquote type="cite">On 10 Dec 2019, at 13:18, Robert Hudson <hudrob@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="auto">Semi-related - a building near my work's internal smoke detection triggered earlier today, calling the fire department.<div dir="auto"><br></div><div dir="auto">And I've seen two reports of smoke detection systems in DCs giving false alarms.</div><div dir="auto"><br></div><div dir="auto">Apparently this morning from the North pylon on the Sydney Harbour Bridge, the CBD buildings were not visible through the smoke.</div><div dir="auto"><br></div><div dir="auto">Also really fun for people with respiratory issues (my kids are asthmatic, one has been to hospital several times with it).</div><div dir="auto"><br></div><div dir="auto">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).</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 10 Dec. 2019, 1:17 pm Nathan Brookfield, <<a href="mailto:Nathan.Brookfield@simtronic.com.au">Nathan.Brookfield@simtronic.com.au</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">At the moment in Sydney, visibility is less than a km in some parts, it’s ridiculous!<u></u><u></u></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;color:#1f497d">Kindest Regards,</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#212121"><u></u><u></u></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;color:#365f91">Nathan Brookfield (VK2NAB)</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#212121"><u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;color:#365f91">Chief Executive Officer</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:#212121"><u></u><u></u></span></p>
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<p class="MsoNormal"><b>From:</b> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank" rel="noreferrer">ausnog-bounces@lists.ausnog.net</a>> <b>On Behalf Of
</b>Steven Waite<br>
<b>Sent:</b> Tuesday, December 10, 2019 12:49 PM<br>
<b>To:</b> John England <<a href="mailto:john@bitwave.com.au" target="_blank" rel="noreferrer">john@bitwave.com.au</a>>; Narelle Clark <<a href="mailto:narellec@gmail.com" target="_blank" rel="noreferrer">narellec@gmail.com</a>>; <a href="mailto:ausnog@ausnog.net" target="_blank" rel="noreferrer">ausnog@ausnog.net</a> <<a href="mailto:ausnog@lists.ausnog.net" target="_blank" rel="noreferrer">ausnog@lists.ausnog.net</a>><br>
<b>Subject:</b> Re: [AusNOG] Smoke and radio performance<u></u><u></u></p>
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<p class="MsoNormal"><span lang="EN-AU">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.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b>From:</b> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank" rel="noreferrer">ausnog-bounces@lists.ausnog.net</a>>
<b>On Behalf Of </b>John England<br>
<b>Sent:</b> Tuesday, 10 December 2019 10:27 AM<br>
<b>To:</b> Narelle Clark <<a href="mailto:narellec@gmail.com" target="_blank" rel="noreferrer">narellec@gmail.com</a>>;
<a href="mailto:ausnog@ausnog.net" target="_blank" rel="noreferrer">ausnog@ausnog.net</a> <<a href="mailto:ausnog@lists.ausnog.net" target="_blank" rel="noreferrer">ausnog@lists.ausnog.net</a>><br>
<b>Subject:</b> Re: [AusNOG] Smoke and radio performance<u></u><u></u></p>
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<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU">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.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1f497d">Cheers.</span><span lang="EN-AU"><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1f497d"> </span><span lang="EN-AU"><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="color:#1f497d">John England</span><span lang="EN-AU"><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
<p class="MsoNormal"><b>From:</b> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank" rel="noreferrer">ausnog-bounces@lists.ausnog.net</a>>
<b>On Behalf Of </b>Narelle Clark<br>
<b>Sent:</b> Tuesday, 10 December 2019 11:14 AM<br>
<b>To:</b> <a href="mailto:ausnog@ausnog.net" target="_blank" rel="noreferrer">ausnog@ausnog.net</a> <<a href="mailto:ausnog@lists.ausnog.net" target="_blank" rel="noreferrer">ausnog@lists.ausnog.net</a>><br>
<b>Subject:</b> [AusNOG] Smoke and radio performance<u></u><u></u></p>
<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU">Folks<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU">Does anyone have any real world measurement data on the performance impact from the bushfire smoke on point to point radio throughput?<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU">We're seeing a hit on a 5GHz system over the last week or so which seems awfully coincidental...<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU">Narelle <u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span lang="EN-AU"><u></u> <u></u></span></p>
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