Mark Fraser <[email protected]> writes: > Looking at this again, I was confusing maxSolarRad_Wpm2 and radiation_Wpm2, > but the reading is still different to what is shown on the weather > station's own display where it is showing 700 W/m² and I'm getting 129.946 > W/m² from weewx_sdr. > > Running RTL_433 directly is showing Watts/m : 129.95 and Lux : > 88753.0
That should be W/m^2. You should understand whether your station hardware (which you did not specify) is measuring irradiance in W/m^2 or illuminance in lux. They are not the same thing and one cannot convert between them without making incorrect assumptions. However people do. https://github.com/weewx/weewx/wiki/Watts-and-lux https://www.extrica.com/article/21667/pdf (likely hard to follow if you are not already familiar with the issues) So: Does the station have an illuminance sensor or an irradiance sensor? (Or both?) If it has only an illuminance sensor, common in low-end stations that have any kind of light sensor, and it reports irradiance, then it is applying some kind of conversion. See what the manual says and if unsatisfactory, ask tech support. (I'll wait :-) (Davis VP2 can optionally have an irradiance sensor, but people do not use rtl-sdr. It also only reports irradiance and does not report illuminance. So it seems pretty clear that's not what you have.) Note that rtl-sdr may also have a conversion, and be populating one field for the other. That you can read the sources of. Note that there is no reason to expect that the conversion in the device and in rtl-sdr is the same, and in reality both are wrong, because strictly there is no conversion. > Something is wrong somewhere. Always true! In this case, much, but I hope the above will enable you to understand better what's going on with your system. -- 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/rmipm5n4slz.fsf%40s1.lexort.com.
