It could be your 'smart' meter. Utility companies have incorporated a wireless way to read your electric meter. It's in the 900Mhz frequency range. They output a full watt of power. While working for an electric company, part of my job was testing these things for radiation issues. I discovered they burned out motion detector lights near them, like within 10' or so. The company was replacing lights for customers like popcorn until they finally got the meter company to swap them out.
Smart meters typically use either 902MHz or 2.4 GHz and only transmit when they are queried from the neighborhood concentrator, they are not sitting there broadcasting all the time. In fact, they are typically using a mesh network of up to 5 hops through other meters to reach the concentrator because the individual meters are not strong enough to reach it on their own.
Smart meters are part 15 devices and they are NOT burning out motion detector lights near them, nor do they require frequent testing by the power companies. In the US, smart meters in residential areas are required to meet absolute emissions limits for unintentional emitters and/or carrier-current devices and the transmit power limits for intentional emitters as specified in Part 15 rules. The data from the smart meter is sent out in short transmission bursts, which usually last a maximum 250 milliseconds at a time. In a typical day a smart meter spends about .25 seconds per minute actually transmitting, for a total of 6 minutes transmitting time per day, for a maximum duty cycle of .4%
I'm just a grumpy guy with a PhD in Electrical Engineering, with a specialty in RF engineering, so take my post for what you want, but Smart meters are NOT interfering with your weather stations.
