Karen, thanks. 
I will do the calculation, and let you know. It will be interesting to have 
a comparison , but I need some more information , particularly the 
 latitude and longitude of the place where your sensors are installed. I 
will send you a private email .
Le vendredi 10 mai 2024 à 19:26:46 UTC+2, Karen K a écrit :

> Jacques Terrettaz schrieb am Dienstag, 7. Mai 2024 um 15:26:49 UTC+2:
>
> 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.
>
>
> Unfortunately I cannot do the calculation actually due to lack of time. 
> But I can provide the raw data for you to do it yourself. The columns of 
> the table within the attached file are:
>
>    - localTime: timestamp of the end of the measuring interval in local 
>    time as text for reference
>    - dateTime: timestamp of the end of the measuring interval in seconds 
>    since 1.1.1970 0:0:0 UTC (Unix time)
>    - radiation: readings of the global irradiance sensor of the Davis 
>    weather station in Watt per squared meter
>    - sunshineDur: readings of the Weerhuisje/Instromet sunshine duration 
>    sensor in seconds per 5 minutes
>    - solarAzimuth: solar azimuth in degrees
>    - solarAltitude: solar altitude in degrees
>
>

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