Re: [nznog] Wireless link adversly affected by the sun?
Hi I don't know how relevant it is but the military have known for a while that sun spots (flares) will affect radio trasnmissions. Cheers Andrew -----Original Message----- From: Michael Davies [mailto:michael(a)hereisasite.co.nz] Sent: Tuesday, 1 August 2006 3:48 p.m. To: nznog(a)list.waikato.ac.nz Subject: [nznog] Wireless link adversly affected by the sun? Hi there, 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 sunny days. 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? Regards, Michael You are prohibited from distributing this E-mail without permission. If you have received this E-mail by mistake or are not the intended recipient, please notify the sender and erase the message immediately. This E-mail message and any accompanying data is confidential and may be legally privileged. The Nelson City Council does not warrant or guarantee that this communication is free of errors, virus or interference. This e-mail has been scanned and cleared by MailMarshal.
On Tue, 1 Aug 2006, Andrew McGhie wrote:
Hi
I don't know how relevant it is but the military have known for a while that sun spots (flares) will affect radio trasnmissions.
Sunspots and flares affect radio, yes. However that doesn't appear to be in any way related to the original post, so I wouldn't confuse the issue. If anyone is particularly interested, a substantially technical explanation of the impact on radio can be found here: http://www.radio-electronics.com/info/propagation/sun/solar_flares.php http://www.nr6ca.org/sun.html I think the most likely explanation in this case is simply temperature related... Mark.
sun spots are a little different to just sun - sun spots are electromegnetic radiation and is reasonably expected to produce issues with Satellite comms. I would suspect the heat side as suggested by others Cheers Wayne -----Original Message----- From: Andrew McGhie [mailto:andrew.mcghie(a)ncc.govt.nz] Sent: Tuesday, 1 August 2006 04:00 To: Michael Davies; nznog(a)list.waikato.ac.nz Subject: Re: [nznog] Wireless link adversly affected by the sun? Hi I don't know how relevant it is but the military have known for a while that sun spots (flares) will affect radio trasnmissions. Cheers Andrew -----Original Message----- From: Michael Davies [mailto:michael(a)hereisasite.co.nz] Sent: Tuesday, 1 August 2006 3:48 p.m. To: nznog(a)list.waikato.ac.nz Subject: [nznog] Wireless link adversly affected by the sun? Hi there, 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 sunny days. 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? Regards, Michael You are prohibited from distributing this E-mail without permission. If you have received this E-mail by mistake or are not the intended recipient, please notify the sender and erase the message immediately. This E-mail message and any accompanying data is confidential and may be legally privileged. The Nelson City Council does not warrant or guarantee that this communication is free of errors, virus or interference. This e-mail has been scanned and cleared by MailMarshal. _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog This communication, including any attachments, is confidential. If you are not the intended recipient, you should not read it - please contact me immediately, destroy it, and do not copy or use any part of this communication or disclose anything about it. Thank you. Please note that this communication does not designate an information system for the purposes of the Electronic Transactions Act 2002.
participants (3)
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Andrew McGhie -
Mark Foster -
Wayne Kampjes