Ground measured solar irradiance data is extremely valuable and critical for benchmarking solar radiation products, modeling climate processes, and understanding the Earth’s radiation budget. However, due to high costs and maintenance requirements, there are only a few hundred high-quality stations globally. Partly due to the scarcity, it has historically been difficult to determine if and where there is a nearby solar radiation monitoring station. To address this, this site provides an overview of high-quality solar radiation monitoring stations worldwide and supporting metadata.

A complete list of stations and metadata can be found here and downloaded as a csv file here.

To find the nearest station to a point of interest, check out the interactive map below. Note that it is possible to click on a station icon to get the station name and country.

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Solar radiation map backgrounds were obtained from the Global Solar Atlas 2.0, a free, web-based application developed and operated by Solargis s.r.o. on behalf of the World Bank Group, utilizing Solargis data, with funding provided by the Energy Sector Management Assistance Program (ESMAP). For additional information see