Radio science encompasses the knowledge and study of all aspects of electromagnetic fields and waves. The International Union of Radio Science (Union Radio-Scientifique Internationale), a non-governmental and non-profit organisation under the International Council for Science, is responsible for stimulating and co-ordinating, on an international basis, studies, research, applications, scientific exchange, and communication in the fields of radio science. URSI has the objective - to encourage and promote international activity in radio science and its applications, for the benefit of humanity; - to encourage the adoption of common methods of measurement - to stimulate and co-ordinate studies of the scientific aspects of the generation, radiation, propagation, and detection of fields and waves and their use in telecommunications. - to represent radio science to the general public.