Yes... some people use that way... but wrongly ! May be also because even the software developed by Davis (Weatherlink) to capture Davis Vantage data is proposing the use of a 120 W/m2 threshold for their global irradiance sensor !!!
The use of global irradiance sensors is largely discussed in the WMO document concerning the measurement of sunshine duration, and 2 differents formulas are proposed in appendix 8A and 8B to calculate the threshold value for global irradiance sensors My extension is using the formula of appendix 8B, and I can say that at least with a Davis radiation sensor, it is working very well , after many years of utilisation! Karen, except your Weerhuilje sunhours sensor, do you have with your weather station any global solar irradiance sensor ? If yes, you could try an alternate calculation of sunshine duration and compare. > Le 7 mai 2024 à 14:57, Karen K <[email protected]> a écrit : > > The sensor, most private weather stations use, measures the global > irradiance, that is from the sun as well as from the sky. So there the > threshold of 120 W/m^2 does not apply. Nevertheless, people use it that way. -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/110E6D14-4188-49F9-99A7-DBF466646431%40gmail.com.
