Solar radiation parameters are acquired in the region of Geneva since several tens of years in order to assess the local solar resource. The acquisition support, the number and type of the acquired parameters and the sites of measurements changed several times during these decades. Nowadays, two sites are maintained by the Energy Group of the Institute of Environmental Sciences, and a third station by the Architecture High School. The data are displayed in real time on the World Wide Web and the archived data are freely accessible through ascii files (www.unige.ch/energie). The data are used in several fields for model development and validation, solar power plants simulation, heating and cooling system study, new technologies development, etc. The present report describes the sites, the sensors, the sensors calibration method, the data display and their accessibility.