Kevin Crivelli <[email protected]> writes: > I've checked to ensure that my weewx configuration is set to "prefer > software" for getting Theoretical Max however, instead of having the bell > curve of the max with Solar Radiation and UV Index I have Solar Radiation > and UV Index but the numbers for the max are extremely low in comparison. I > am providing a screenshot to show you what I mean. Also I am using the > graph setup directly from the Belchertown Charts Document so I'm not sure > why this is what is happening. > > I'm providing two screenshots. one with just UV Index and Max and one with > all 3. > > [image: max1.JPG][image: max2.JPG]
(text mode mail reader here :-) > You'll see I do have data for the Max but it's wildly lower in wm^2 than > that of solar radiation Assuming you are at mid latitudes (40ish), I would expect theoretical max solar radiation to peak around solar noon around 1000 W/m^2 earlier in summer and maybe 900 now. Looking at my own graphs (42N, Boston), I eyeball 870 W/m^2. On clear-sky days the measured values are fairly close to the theoretical max curve. On partly cloudy days the peak measured values and the "max observed" values are higher, but not massively so. However, your values are just crazy. 67,000 W/m^2 is simply not possible on earth. A theoretical max of 874 W/m^2 is totally reasonable, depending on where you are. You mentioned Acurite, so you should be clear on what sensors your station actually has. It is highly likely that it measures illuminance in lux (= lumens/m^2) and not irradiance in W/m^2. One cannot convert lux to W/m^2, but people do anyway. Read carefully: https://github.com/weewx/weewx/wiki/Watts-and-lux/ Probably you are storing illuminance in an irradiance field, and there seems to be historical confusion in the wview schema which IIRC has a field labeled "radiation". -- 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/rmibkelbfhq.fsf%40s1.lexort.com.
