The radiation observation type provides the actual sun power received at the time of measurement. The value depends on cloud coverage and the time of day.
Besides that it is interesting to know which amount of energy was received from the sun during the day or any other period of time. To get that value some calculation has to be done. Unlike with rain that cannot be done by simply summarizing the observation readings. Energy is no cumulative value. Instead, it is necessary to integrate (in the mathematical meaning of that word) the radiation readings over the aggregation interval. I extended GTS extension <https://github.com/roe-dl/weewx-GTS> to do that. For example you can display the amount of sun energy received the day before by using the tag $yesterday.radiation.energy_integral. Plots are also possible. For examples showing these values see: sun radiation energy value <https://www.woellsdorf-wetter.de> sun radiation energy plot <https://www.woellsdorf-wetter.de/graphs/?graph=month#Sonnenenergie> -- 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/8bfdcecb-8631-4a69-8c66-827b64d39949n%40googlegroups.com.
