CESRA organizes triennial workshops on investigations of the solar atmosphere using radio and other observations. Although special emphasis is given to radio diagnostics, the workshop topics are of interest to a large community of solar physicists. The format of the workshops usually combine plenary sessions and working group sessions, with invited review talks, oral contributions, and posters. The workshops attract not only European scientists, but also scientists from the USA, China, Japan, Australia, and Brazil. CESRA has also cosponsored international solar physics conferences organized by the European Physical Society and in one occasion has organized a session within the European Geophysical Society 's General Assembly.