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PostPosted: Thu May 27, 2021 8:08 am 

Joined: Thu May 27, 2021 7:47 am
Posts: 1
When I entered the coordinates and imported Meteonorm 8.0, "Meteonorm 8.0 (1981-2009), Sat = 23%" was obtained.
What kind of calculation is the Monthly meteo (Global irradiance, Global diffuse, Temperature, etc.) of this "Meteonorm 8.0 (1981-2009), Sat = 23%" calculated?

Is it the average value of station data in several nearby locations?
Or is it the value calculated by the mathematical model?


PostPosted: Tue Jun 08, 2021 10:33 am 
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Joined: Thu Sep 26, 2019 10:47 am
Posts: 21

Sat = 23% means that the share of satellite data when interpolating is 23%, the rest corresponds to station data, interpolated from nearby stations. Meteonorm does use a mixture of satellite and station data. The further one is from the stations the greater the weight of satellite data.

For more information about meteonorm, please also look at their documentation. For example their handbook's chapter 7.2 describes the interpolation in more details https://meteonorm.com/assets/downloads/mn80_theory.pdf

Best regards | Cordialement
Lazare Fesnien – www.pvsyst.com

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