Atmosphere Condition
After two weeks of drought conditions and 7 days of temperatures in Toronto being over 30 C I started to get reflection off the atmosphere. I noticed this on two different times of the year. The first when it was extremely cold such that the temperature was lower than -15 C and now when the temperature was greater than 30 C.
What happens is the outer node start receiving clear signals from nodes that are over a kilometre away. The signal reflects off a layer of the atmosphere and reflects back to the antenna. The signal is clear and can link two mesh nodes together.
When it was extremely cold my assumption was that pollution with water vapour was blanketing the city. Temperature inversion were also detected by weatherman. One could only speculate that the cold temperature created ice crystals that help reflect the RF signal.
In hot temperature a combination of pollution and humidity also create the same type of reflection.
Nevertheless in both case the linking of reflect nodes was stable when connected and did provide adequate through put.
What happens is the outer node start receiving clear signals from nodes that are over a kilometre away. The signal reflects off a layer of the atmosphere and reflects back to the antenna. The signal is clear and can link two mesh nodes together.
When it was extremely cold my assumption was that pollution with water vapour was blanketing the city. Temperature inversion were also detected by weatherman. One could only speculate that the cold temperature created ice crystals that help reflect the RF signal.
In hot temperature a combination of pollution and humidity also create the same type of reflection.
Nevertheless in both case the linking of reflect nodes was stable when connected and did provide adequate through put.
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