Liking one way of calculations is one thing, real world empirical data that says the new way of calculating is indeed more accurate should be the proof one needs. That would include having enough fade margin to maintain the uptime and also enough time to make sure one did not just have a year that is out of the norm with regards to rainfall. I would be curious to know if anyone has spent the time to tune the rain fade numbers we all assume, by taking historical data from the modern Doppler radar systems. That data should be able to either verify or recalibrate based on rain drop sizes and such. I sat in on a class one day given by the National Weather Service and they can view a lot of things with the various radar products and modes they can utilize. The public gets a much more generalized radar picture than the various thing a trained user can look at.
Thank you, Brian Webster www.wirelessmapping.com From: AF [mailto:[email protected]] On Behalf Of Mike Hammett Sent: Wednesday, February 24, 2021 5:56 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] 80ghz reliability in Rain http://thebrotherswisp.com/index.php/rain-fade/ I like this method of uptime calculation rather than the old methods commonly used. ----- Mike Hammett <http://www.ics-il.com/> Intelligent Computing Solutions <https://www.facebook.com/ICSIL> <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> <https://www.linkedin.com/company/intelligent-computing-solutions> <https://twitter.com/ICSIL> <http://www.midwest-ix.com/> Midwest Internet Exchange <https://www.facebook.com/mdwestix> <https://www.linkedin.com/company/midwest-internet-exchange> <https://twitter.com/mdwestix> <http://www.thebrotherswisp.com/> The Brothers WISP <https://www.facebook.com/thebrotherswisp> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> _____ From: "Nate Burke" <[email protected]> To: "Animal Farm" <[email protected]> Sent: Wednesday, February 24, 2021 4:43:54 PM Subject: [AFMUG] 80ghz reliability in Rain One of our distributors is trying to push us into an 80ghz link for a 1.7 mile hop. Siklu says that 2' dishes on each side will have no rain problems in our Rain zone 'K'. I have trouble believing that. Our AF24 link that is in place now Fades during rain events. An AF60 link we have at 0.4 miles also fades. What are real world experiences with 80ghz? How hard is it to align 80ghz dishes, especially at that distance? We once had to align a 24ghz 3' Trango dish that had no fine adjustments, and it took almost 2 hours because the signal would change with every turn of the UBolt. Same with the AF60 radio, but that mount bracket is a pile of garbage anyway. I see they sell a fine adjustment bracket for the AF60 now. -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
