The World Radiation Data Centre (WRDC) is one of recognised World Data Centres sponsored by the World Meteorological Organization (WMO).The WRDC is a laboratory of Voeikov Main Geophysical Observatory,Russian Federal Service for Hydrometeorology and Environmental Monitoring -formerly USSR State Committee for Hydrometeorology, and is located in St.Petersburg. The WRDC began as the World Radiation Data Centre in 1964 and produced its first data publication of Solar Radiation and Radiation Balance Data (The World Network) in 1965. For more detailed information, please, contact: Voeikov Main Geophysical Observatory, World Radiation Data Centre, 7, Karbyshev Str., 194021, St.Petersburg, Russian Federation. tel.: 7 (812) 297-43-90 fax.: 7 (812) 297-86-61 Please direct any comments or suggestions regarding this site to Dr. Anatoly V. Tsvetkov, Head of WRDC. tel:7 (812) 295-04-45. e-mail: wrdc@main.mgo.rssi.ru e-mail: tsvetkov@main.mgo.rssi.ru Attention: 1. For correct visualisation of latest data in the link Data on the first page via Java applets please update Java at the site http://www.java.com/. 2. It's nesessary to clear Java cash memory and temporary files, as well check Security Level of Configure Java and check browser's Security Level and clear temporary files.