I did this with historical weather data when we first got hit with the summertime 900mhz death mornings. matched to the temp/humidity where i could find good weatherstation data
On Mon, Aug 28, 2017 at 9:14 AM, Cameron Crum <cc...@wispmon.com> wrote: > Would be interesting to see a graph related to temperature and humidity vs > signal strength to see if there is some ducting, or even temp probes at > different elevations during the event Also, how does the corn plant itself > behave during the day? Do the leaves lift or sag or stay the same? Corn > leaves are pretty wide and smooth. I wonder if they could be acting like a > nice smooth reflective surface due to a rise of the leaves? > > > On Mon, Aug 28, 2017 at 7:49 AM, Adam Moffett <dmmoff...@gmail.com> wrote: > >> Ken said he would (where possible) position the antenna so the center of >> the path was passing over a tree. >> >> I guess if the issue was destructive reflections off the corn then the >> tree attenuates those reflections? >> >> >> ------ Original Message ------ >> From: "Chuck McCown" <ch...@wbmfg.com> >> To: af@afmug.com >> Sent: 8/27/2017 11:27:12 PM >> Subject: Re: [AFMUG] 5Ghz thermal fade w/ Corn >> >> First time I ever heard about this was many years ago from Ken Hohof. >> Corn and pine trees seem to have a unique effect on RF. >> >> *From:* Kurt Fankhauser >> *Sent:* Sunday, August 27, 2017 8:43 PM >> *To:* af@afmug.com >> *Subject:* [AFMUG] 5Ghz thermal fade w/ Corn >> >> I have a customer on a PMP450 SM at 5Ghz link only 2.8 miles out. This SM >> normally sits at -62 or -65. Every evening for the last 2 months SM will >> fade to -80 or worse and sometimes even disconnecting for a couple hours >> then it comes right back. AP is 120 feet height customer CPE height is >> about 15' height >> >> There is alot of corn fields across this link i have in the past seen >> problems with corn links. I don't know why but shooting across corn is >> sometimes a problem. >> >> Other thing i thought of is the AP is mounted on top of of a very large >> steel grain bin that probably is heating up during the day maybe it is >> giving off heat when the sun first goes down we have started to get cool in >> the evenings here. >> >> I am about ready to move customer to a different frequency band he is >> pissed his Netflix is not working during prime time. >> >> [image: Inline image 1][image: Inline image 3] >> >> >
