Bob DeMattia <b...@demattia.net> writes: > Quite a bit of attenuation! The sensor is located approximately 8 feet > horizontally and fifteen feet vertically > from the display. It must be the wet roof!
Not sure what you have for station hardware. That graph suggests Davis VP2 or Vue, and there I am pretty sure 'signal quality' is a recent average of the fraction of packets successfully received vs what should have been received. Assuming Davis: Davis at the 8'/15' should be very solid. It's 915 MHz, and it is very slow FH, AIUI one data packet on a frequency and a new frequency for the next packet rotating among a set of 51 (US). That protects against narrowband interference. So I am skeptical that this is just due to increased path loss. I don't look at signal strength on my VP2 often, but I used to see a dip from 100 to 98% occasionally, and the time pattern was suggestive of some other transmitter, but I haven't figured it out. But it was a brief dip to 98%, not hours at 25%. I just checked and last night with the temp peak/rain event it was mostly 99.1/99.9% with an occasional 97ish%. I can perceive no patterns. Console/sensor distance is probably 20' horizontal, 10' vertical, so not so different. Therefore, I would be suspicious of broadband noise happening because of the rain, although I admit that at 900 the level needed to explain this does not make a lot of sense. Speculating wildly and beyond the point of reason, it could be arcing of a powerline insulator when wet. Perhaps listen at 450 MHz during the next rain, or at 900 if you have an SDR set up that can function as a spectrum analyzer (rtlsdr/gqrx?). You can also use rtldavis to listen to the packets: https://github.com/lheijst/rtldavis with an RTL-SDR dongle. That might be useful information. Greg -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/rmia6vhf4rs.fsf%40s1.lexort.com.
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