World Radiation Data Center (WRDC) Data

Petersburg, Russia, serves as a central depository for solar radiation data collected at over 1000 measurement sites throughout the world. The WRDC centrally collects, archives, and publishes radiometric data from the world to ensure the availability of these data for research by the international scientific community.

The WRDC archive contains the following measurements: Global solar radiation Diffuse solar radiation Downward atmospheric radiation Sunshine duration Direct solar radiation (hourly and instantaneous) Net total radiation Net terrestrial surface radiation (upward) Terrestrial surface radiation Reflected solar radiation Spectral radiation components (instantaneous fluxes) This online archive is made possible through the joint resources of the World Radiation Data Centre and the U.S. Department of Energy's National Renewable Energy Laboratory.