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</html><thumbnail_url>https://blog.otthydromet.com/wp-content/uploads/2025/05/PV_Panels_solar_dusk-800x1200-b5da8ab.jpeg</thumbnail_url><thumbnail_width>800</thumbnail_width><thumbnail_height>428</thumbnail_height><description>Dew, frost, and soiling have a significant impact on the data quality of solar radiation. Our webinar provides an overview and explanation of the factors affecting solar radiation data and instrumentation classes according to the ISO 9060:2018 international standard.</description></oembed>
